Merge branch 'next' into rlc_updates

CHANGELOG

@@ -1,6 +1,10 @@
 Change Log for Releases
 ==============================
 
+## 18.03.1
+  * Fixed compilation for NEON
+  * Fixed logging and RLC AM issue
+
 ## 18.03
   * Many bug-fixes and improved stability and performance in all parts
 

cmake/modules/SRSLTEVersion.cmake

@@ -20,5 +20,5 @@
 
 SET(SRSLTE_VERSION_MAJOR 18)
 SET(SRSLTE_VERSION_MINOR 3)
-SET(SRSLTE_VERSION_PATCH 0)
+SET(SRSLTE_VERSION_PATCH 1)
 SET(SRSLTE_VERSION_STRING "${SRSLTE_VERSION_MAJOR}.${SRSLTE_VERSION_MINOR}.${SRSLTE_VERSION_PATCH}")

lib/include/srslte/asn1/liblte_common.h

@@ -51,9 +51,11 @@
 
 // FIXME: This was chosen arbitrarily
 #define LIBLTE_ASN1_OID_MAXSUBIDS 128
+
+// Caution these values must match SRSLTE_ ones in common.h
 #define LIBLTE_MAX_MSG_SIZE_BITS  102048
 #define LIBLTE_MAX_MSG_SIZE_BYTES 12756
-#define LIBLTE_MSG_HEADER_OFFSET  1024
+#define LIBLTE_MSG_HEADER_OFFSET  1020
 
 /*******************************************************************************
                               TYPEDEFS
@@ -82,6 +84,8 @@ static const char liblte_error_text[LIBLTE_ERROR_N_ITEMS][64] = {
   "Decode failure",
 };
 
+#define LIBLTE_STRING_LEN 128
+
 typedef void* LIBLTE_ASN1_OPEN_TYPE_STRUCT;
 
 typedef struct {
@@ -96,86 +100,15 @@ typedef struct{
 
 typedef struct{
     uint32 N_bits;
+    uint8  header[LIBLTE_MSG_HEADER_OFFSET];
     uint8  msg[LIBLTE_MAX_MSG_SIZE_BITS];
-}LIBLTE_SIMPLE_BIT_MSG_STRUCT;
+}LIBLTE_BIT_MSG_STRUCT;
 
 typedef struct{
     uint32 N_bytes;
+    uint8  header[LIBLTE_MSG_HEADER_OFFSET];
     uint8  msg[LIBLTE_MAX_MSG_SIZE_BYTES];
-}LIBLTE_SIMPLE_BYTE_MSG_STRUCT;
+}LIBLTE_BYTE_MSG_STRUCT;
-
-
-struct LIBLTE_BYTE_MSG_STRUCT{
-    uint32  N_bytes;
-    uint8   buffer[LIBLTE_MAX_MSG_SIZE_BYTES];
-    uint8  *msg;
-
-    LIBLTE_BYTE_MSG_STRUCT():N_bytes(0)
-    {
-      msg = &buffer[LIBLTE_MSG_HEADER_OFFSET];
-    }
-    LIBLTE_BYTE_MSG_STRUCT(const LIBLTE_BYTE_MSG_STRUCT& buf)
-    {
-      N_bytes = buf.N_bytes;
-      memcpy(msg, buf.msg, N_bytes);
-    }
-    LIBLTE_BYTE_MSG_STRUCT & operator= (const LIBLTE_BYTE_MSG_STRUCT & buf)
-    {
-      // avoid self assignment
-      if (&buf == this)
-        return *this;
-      N_bytes = buf.N_bytes;
-      memcpy(msg, buf.msg, N_bytes);
-      return *this;
-    }
-    uint32 get_headroom()
-    {
-      return msg-buffer;
-    }
-    void reset()
-    {
-      N_bytes = 0;
-      msg = &buffer[LIBLTE_MSG_HEADER_OFFSET];
-    }
-};
-
-struct LIBLTE_BIT_MSG_STRUCT{
-    uint32  N_bits;
-    uint8   buffer[LIBLTE_MAX_MSG_SIZE_BITS];
-    uint8  *msg;
-
-    LIBLTE_BIT_MSG_STRUCT():N_bits(0)
-    {
-      msg = &buffer[LIBLTE_MSG_HEADER_OFFSET];
-      while( (uint64_t)(msg) % 8 > 0) {
-        msg++;
-      }
-    }
-    LIBLTE_BIT_MSG_STRUCT(const LIBLTE_BIT_MSG_STRUCT& buf){
-      N_bits = buf.N_bits;
-      memcpy(msg, buf.msg, N_bits);
-    }
-    LIBLTE_BIT_MSG_STRUCT & operator= (const LIBLTE_BIT_MSG_STRUCT & buf){
-      // avoid self assignment
-      if (&buf == this)
-        return *this;
-      N_bits = buf.N_bits;
-      memcpy(msg, buf.msg, N_bits);
-      return *this;
-    }
-    uint32 get_headroom()
-    {
-      return msg-buffer;
-    }
-    void reset()
-    {
-      N_bits = 0;
-      msg = &buffer[LIBLTE_MSG_HEADER_OFFSET];
-      while( (uint64_t)(msg) % 8 > 0) {
-        msg++;
-      }
-    }
-};
 
 
 /*******************************************************************************

lib/include/srslte/asn1/liblte_mme.h

@@ -1209,7 +1209,7 @@ static const char liblte_mme_add_ci_text[LIBLTE_MME_ADD_CI_N_ITEMS][20] = {"Don'
                                                                            "Add"};
 // Structs
 typedef struct{
-    std::string            name;
+    char                   name[LIBLTE_STRING_LEN];
     LIBLTE_MME_ADD_CI_ENUM add_ci;
 }LIBLTE_MME_NETWORK_NAME_STRUCT;
 // Functions
@@ -1752,7 +1752,7 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_guti_type_ie(uint8                     **ie_
 // Enums
 // Structs
 typedef struct{
-    std::string apn;
+    char apn[LIBLTE_STRING_LEN];
 }LIBLTE_MME_ACCESS_POINT_NAME_STRUCT;
 // Functions
 LIBLTE_ERROR_ENUM liblte_mme_pack_access_point_name_ie(LIBLTE_MME_ACCESS_POINT_NAME_STRUCT  *apn,

lib/include/srslte/asn1/liblte_rrc.h

@@ -5579,7 +5579,7 @@ static const char liblte_rrc_ul_information_transfer_type_text[LIBLTE_RRC_UL_INF
                                                                                                                        "CDMA2000-HRPD"};
 // Structs
 typedef struct{
-    LIBLTE_SIMPLE_BYTE_MSG_STRUCT                dedicated_info;
+    LIBLTE_BYTE_MSG_STRUCT                dedicated_info;
     LIBLTE_RRC_UL_INFORMATION_TRANSFER_TYPE_ENUM dedicated_info_type;
 }LIBLTE_RRC_UL_INFORMATION_TRANSFER_STRUCT;
 // Functions
@@ -5960,7 +5960,7 @@ typedef struct{
 }LIBLTE_RRC_REGISTERED_MME_STRUCT;
 typedef struct{
     LIBLTE_RRC_REGISTERED_MME_STRUCT registered_mme;
-    LIBLTE_SIMPLE_BYTE_MSG_STRUCT    dedicated_info_nas;
+    LIBLTE_BYTE_MSG_STRUCT    dedicated_info_nas;
     uint8                            rrc_transaction_id;
     uint8                            selected_plmn_id;
     bool                             registered_mme_present;
@@ -6245,7 +6245,7 @@ typedef struct{
 typedef struct{
     LIBLTE_RRC_MEAS_CONFIG_STRUCT           meas_cnfg;
     LIBLTE_RRC_MOBILITY_CONTROL_INFO_STRUCT mob_ctrl_info;
-    LIBLTE_SIMPLE_BYTE_MSG_STRUCT           ded_info_nas_list[LIBLTE_RRC_MAX_DRB];
+    LIBLTE_BYTE_MSG_STRUCT           ded_info_nas_list[LIBLTE_RRC_MAX_DRB];
     LIBLTE_RRC_RR_CONFIG_DEDICATED_STRUCT   rr_cnfg_ded;
     LIBLTE_RRC_SECURITY_CONFIG_HO_STRUCT    sec_cnfg_ho;
     uint32                                  N_ded_info_nas;
@@ -6626,7 +6626,7 @@ static const char liblte_rrc_dl_information_transfer_type_text[LIBLTE_RRC_DL_INF
                                                                                                                        "CDMA2000-HRPD"};
 // Structs
 typedef struct{
-    LIBLTE_SIMPLE_BYTE_MSG_STRUCT                dedicated_info;
+    LIBLTE_BYTE_MSG_STRUCT                dedicated_info;
     LIBLTE_RRC_DL_INFORMATION_TRANSFER_TYPE_ENUM dedicated_info_type;
     uint8                                        rrc_transaction_id;
 }LIBLTE_RRC_DL_INFORMATION_TRANSFER_STRUCT;

lib/include/srslte/common/common.h

@@ -61,7 +61,7 @@
 // 3GPP 36.306 Table 4.1.1
 #define SRSLTE_MAX_BUFFER_SIZE_BITS  102048
 #define SRSLTE_MAX_BUFFER_SIZE_BYTES 12756
-#define SRSLTE_BUFFER_HEADER_OFFSET  1024
+#define SRSLTE_BUFFER_HEADER_OFFSET  1020
 
 #define SRSLTE_BUFFER_POOL_LOG_ENABLED
 
@@ -116,15 +116,17 @@ public:
 
     byte_buffer_t():N_bytes(0)
     {
+      bzero(buffer, SRSLTE_MAX_BUFFER_SIZE_BYTES);
       timestamp_is_set = false;
       msg  = &buffer[SRSLTE_BUFFER_HEADER_OFFSET];
       next = NULL; 
 #ifdef SRSLTE_BUFFER_POOL_LOG_ENABLED
-      debug_name[0] = 0;
+      bzero(debug_name, SRSLTE_BUFFER_POOL_LOG_NAME_LEN);
 #endif
     }
     byte_buffer_t(const byte_buffer_t& buf)
     {
+      bzero(buffer, SRSLTE_MAX_BUFFER_SIZE_BYTES);
       N_bytes = buf.N_bytes;
       memcpy(msg, buf.msg, N_bytes);
     }
@@ -133,6 +135,7 @@ public:
       // avoid self assignment
       if (&buf == this)
         return *this;
+      bzero(buffer, SRSLTE_MAX_BUFFER_SIZE_BYTES);
       N_bytes = buf.N_bytes;
       memcpy(msg, buf.msg, N_bytes);
       return *this;

lib/include/srslte/common/pdu_queue.h

@@ -41,10 +41,15 @@ namespace srslte {
 class pdu_queue
 {
 public:
+  typedef enum {
+    DCH,
+    BCH,
+    MCH
+  } channel_t;
   class process_callback
   {
     public:
-      virtual void process_pdu(uint8_t *buff, uint32_t len, uint32_t tstamp) = 0;
+      virtual void process_pdu(uint8_t *buff, uint32_t len, channel_t channel, uint32_t tstamp) = 0;
   };
 
   pdu_queue(uint32_t pool_size = DEFAULT_POOL_SIZE) : pool(pool_size), callback(NULL), log_h(NULL) {}
@@ -52,7 +57,7 @@ public:
 
   uint8_t* request(uint32_t len);
   void     deallocate(uint8_t* pdu);
-  void     push(uint8_t *ptr, uint32_t len, uint32_t tstamp = 0);
+  void     push(uint8_t *ptr, uint32_t len, channel_t channel = DCH, uint32_t tstamp = 0);
 
   bool   process_pdus();
 
@@ -64,6 +69,7 @@ private:
     uint8_t  ptr[MAX_PDU_LEN];
     uint32_t len;
     uint32_t tstamp;
+    channel_t channel;
     #ifdef SRSLTE_BUFFER_POOL_LOG_ENABLED
       char   debug_name[128];
     #endif

lib/include/srslte/common/threads.h

@@ -89,7 +89,7 @@ public:
     period_us = period_us_; 
     start(priority);
   }
-  void stop() {
+  void stop_thread() {
     run_enable = false;
     wait_thread_finish();
   }

lib/include/srslte/common/timers.h

@@ -64,7 +64,7 @@ public:
       return (counter < timeout) && running; 
     }
     bool is_expired() {
-      return (timeout > 0) && (counter >= timeout || !running);
+      return (timeout > 0) && (counter >= timeout);
     }
     uint32_t get_timeout() {
       return timeout; 

lib/include/srslte/interfaces/ue_interfaces.h

@@ -112,30 +112,34 @@ public:
 class nas_interface_rrc
 {
 public:
+  typedef enum {
+    BARRING_NONE = 0,
+    BARRING_MO_DATA,
+    BARRING_MO_SIGNALLING,
+    BARRING_MT,
+    BARRING_ALL
+  } barring_t;
+  virtual void      set_barring(barring_t barring) = 0;
+  virtual void      paging(LIBLTE_RRC_S_TMSI_STRUCT *ue_identiy) = 0;
   virtual bool      is_attached() = 0;
-  virtual bool      is_attaching() = 0;
-  virtual void      notify_connection_setup() = 0;
   virtual void      write_pdu(uint32_t lcid, srslte::byte_buffer_t *pdu) = 0;
   virtual uint32_t  get_ul_count() = 0;
-  virtual bool      get_s_tmsi(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi) = 0;
   virtual bool      get_k_asme(uint8_t *k_asme_, uint32_t n) = 0;
-  virtual bool      plmn_found(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, uint16_t tracking_area_code) = 0;
-  virtual void      plmn_search_end() = 0;
 };
 
 // NAS interface for UE
 class nas_interface_ue
 {
 public:
-  virtual void attach_request() = 0;
+  virtual bool attach_request() = 0;
-  virtual void deattach_request() = 0;
+  virtual bool deattach_request() = 0;
 };
 
 // NAS interface for UE
 class nas_interface_gw
 {
 public:
-  virtual void attach_request() = 0;
+  virtual bool attach_request() = 0;
 };
 
 // RRC interface for MAC
@@ -159,8 +163,6 @@ class rrc_interface_phy
 public:
   virtual void in_sync() = 0;
   virtual void out_of_sync() = 0;
-  virtual void earfcn_end() = 0;
-  virtual void cell_camping(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp = NAN) = 0;
   virtual void new_phy_meas(float rsrp, float rsrq, uint32_t tti, int earfcn = -1, int pci = -1) = 0;
 };
 
@@ -168,12 +170,23 @@ public:
 class rrc_interface_nas
 {
 public:
+  typedef struct {
+    LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id;
+    uint16_t                        tac;
+  } found_plmn_t;
+
+  const static int MAX_FOUND_PLMNS = 16;
+
   virtual void write_sdu(uint32_t lcid, srslte::byte_buffer_t *sdu) = 0;
   virtual uint16_t get_mcc() = 0;
   virtual uint16_t get_mnc() = 0;
   virtual void enable_capabilities() = 0;
-  virtual void plmn_search() = 0;
+  virtual int plmn_search(found_plmn_t found_plmns[MAX_FOUND_PLMNS]) = 0;
-  virtual void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, bool connect_request = false) = 0;
+  virtual void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id) = 0;
+  virtual bool connection_request(LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM cause,
+                                  srslte::byte_buffer_t *dedicatedInfoNAS) = 0;
+  virtual void set_ue_idenity(LIBLTE_RRC_S_TMSI_STRUCT s_tmsi) = 0;
+  virtual bool is_connected() = 0;
   virtual std::string get_rb_name(uint32_t lcid) = 0;
 };
 
@@ -381,11 +394,6 @@ public:
   /* Indicate successfull decoding of PCH TB through PDSCH */
   virtual void pch_decoded_ok(uint32_t len) = 0;  
 
-  /* Function called every start of a subframe (TTI). Warning, this function is called 
-   * from a high priority thread and should terminate asap 
-   */
-  virtual void tti_clock(uint32_t tti) = 0;
-  
 };
 
 /* Interface RRC -> MAC shared between different RATs */
@@ -420,14 +428,13 @@ public:
     uint32_t prach_config_index;
   } mac_cfg_t;
 
+  virtual void    clear_rntis() = 0;
+
   /* Instructs the MAC to start receiving BCCH */
-  virtual void    bcch_start_rx() = 0; 
-  virtual void    bcch_stop_rx() = 0; 
   virtual void    bcch_start_rx(int si_window_start, int si_window_length) = 0;
 
   /* Instructs the MAC to start receiving PCCH */
   virtual void    pcch_start_rx() = 0; 
-  virtual void    pcch_stop_rx() = 0; 
 
   /* RRC configures a logical channel */
   virtual void    setup_lcid(uint32_t lcid, uint32_t lcg, uint32_t priority, int PBR_x_tti, uint32_t BSD) = 0;
@@ -487,9 +494,10 @@ typedef struct {
   uint32_t cfo_loop_pss_conv;
   uint32_t cfo_ref_mask;
   bool average_subframe_enabled;
-  int time_correct_period; 
+  bool estimator_fil_auto;
+  float estimator_fil_stddev;
+  uint32_t estimator_fil_order;
   std::string sss_algorithm;
-  float estimator_fil_w;   
   bool rssi_sensor_enabled;
   bool sic_pss_enabled;
   float rx_gain_offset;
@@ -503,8 +511,6 @@ typedef struct {
 class phy_interface_mac_common
 {
 public:
-  /* Start synchronization with strongest cell in the current carrier frequency */
-  virtual bool sync_status() = 0;
 
   /* Sets a C-RNTI allowing the PHY to pregenerate signals if necessary */
   virtual void set_crnti(uint16_t rnti) = 0;
@@ -581,15 +587,20 @@ public:
   virtual int  meas_start(uint32_t earfcn, int pci = -1) = 0;
   virtual int  meas_stop(uint32_t earfcn, int pci = -1) = 0;
 
+  typedef struct {
+    enum {CELL_FOUND = 0, CELL_NOT_FOUND, ERROR} found;
+    enum {MORE_FREQS = 0, NO_MORE_FREQS} last_freq;
+  } cell_search_ret_t;
+
+  typedef struct {
+    srslte_cell_t cell;
+    uint32_t      earfcn;
+  } phy_cell_t;
+
   /* Cell search and selection procedures */
-  virtual void cell_search_start() = 0;
+  virtual cell_search_ret_t  cell_search(phy_cell_t *cell) = 0;
-  virtual void cell_search_next() = 0;
+  virtual bool cell_select(phy_cell_t *cell = NULL) = 0;
-  virtual void cell_select(uint32_t earfcn, srslte_cell_t cell) = 0;
+  virtual bool cell_is_camping() = 0;
-  virtual bool cell_handover(srslte_cell_t cell) = 0;
-
-  /* Is the PHY downlink synchronized? */
-  virtual bool sync_status() = 0;
-  virtual void sync_reset()  = 0;
 
   /* Configure UL using parameters written with set_param() */
   virtual void configure_ul_params(bool pregen_disabled = false) = 0;

lib/include/srslte/phy/ch_estimation/chest_dl.h

@@ -74,6 +74,7 @@ typedef struct {
   float snr_vector[12000];
   float pilot_power[12000];
 #endif
+  bool smooth_filter_auto;
   uint32_t smooth_filter_len; 
   float smooth_filter[SRSLTE_CHEST_MAX_SMOOTH_FIL_LEN];
 
@@ -112,10 +113,10 @@ SRSLTE_API void srslte_chest_dl_free(srslte_chest_dl_t *q);
 
 SRSLTE_API int srslte_chest_dl_set_mbsfn_area_id(srslte_chest_dl_t *q,
                                                  uint16_t mbsfn_area_id);
+
 SRSLTE_API int srslte_chest_dl_set_cell(srslte_chest_dl_t *q,
                                         srslte_cell_t cell);
 
-
 SRSLTE_API void srslte_chest_dl_set_smooth_filter(srslte_chest_dl_t *q, 
                                                   float *filter, 
                                                   uint32_t filter_len); 
@@ -123,6 +124,13 @@ SRSLTE_API void srslte_chest_dl_set_smooth_filter(srslte_chest_dl_t *q,
 SRSLTE_API void srslte_chest_dl_set_smooth_filter3_coeff(srslte_chest_dl_t* q, 
                                                          float w); 
 
+SRSLTE_API void srslte_chest_dl_set_smooth_filter_gauss(srslte_chest_dl_t* q,
+                                                        uint32_t order,
+                                                        float std_dev);
+
+SRSLTE_API void srslte_chest_dl_set_smooth_filter_auto(srslte_chest_dl_t* q,
+                                            bool enable);
+
 SRSLTE_API void srslte_chest_dl_set_noise_alg(srslte_chest_dl_t *q, 
                                               srslte_chest_dl_noise_alg_t noise_estimation_alg); 
 

lib/include/srslte/phy/mimo/precoding.h

@@ -87,7 +87,7 @@ SRSLTE_API int srslte_predecoding_single(cf_t *y,
 SRSLTE_API int srslte_predecoding_single_multi(cf_t *y[SRSLTE_MAX_PORTS], 
                                                cf_t *h[SRSLTE_MAX_PORTS], 
                                                cf_t *x, 
-                                               float *csi,
+                                               float *csi[SRSLTE_MAX_CODEWORDS],
                                                int nof_rxant,
                                                int nof_symbols, 
                                                float scaling,
@@ -103,6 +103,7 @@ SRSLTE_API int srslte_predecoding_diversity(cf_t *y,
 SRSLTE_API int srslte_predecoding_diversity_multi(cf_t *y[SRSLTE_MAX_PORTS], 
                                                   cf_t *h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS], 
                                                   cf_t *x[SRSLTE_MAX_LAYERS],
+                                                  float *csi[SRSLTE_MAX_LAYERS],
                                                   int nof_rxant,
                                                   int nof_ports, 
                                                   int nof_symbols,
@@ -113,7 +114,7 @@ SRSLTE_API void srslte_predecoding_set_mimo_decoder (srslte_mimo_decoder_t _mimo
 SRSLTE_API int srslte_predecoding_type(cf_t *y[SRSLTE_MAX_PORTS],
                                        cf_t *h[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
                                        cf_t *x[SRSLTE_MAX_LAYERS],
-                                       float *csi,
+                                       float *csi[SRSLTE_MAX_CODEWORDS],
                                        int nof_rxant,
                                        int nof_ports,
                                        int nof_layers,

lib/include/srslte/phy/phch/sch.h

@@ -64,7 +64,7 @@ typedef struct SRSLTE_API {
   uint8_t *parity_bits;  
   void *e;
   uint8_t *temp_g_bits;
-  uint16_t *ul_interleaver;
+  uint32_t *ul_interleaver;
   srslte_uci_bit_t ack_ri_bits[12*288];
   uint32_t nof_ri_ack_bits; 
   

lib/include/srslte/phy/utils/bit.h

@@ -70,6 +70,17 @@ SRSLTE_API void srslte_bit_copy(uint8_t *dst,
                                 uint32_t src_offset, 
                                 uint32_t nof_bits);
 
+SRSLTE_API void srslte_bit_interleave_i(uint8_t *input,
+                                        uint8_t *output,
+                                        uint32_t *interleaver,
+                                        uint32_t nof_bits);
+
+SRSLTE_API void srslte_bit_interleave_i_w_offset(uint8_t *input,
+                                                 uint8_t *output,
+                                                 uint32_t *interleaver,
+                                                 uint32_t nof_bits,
+                                                 uint32_t w_offset);
+
 SRSLTE_API void srslte_bit_interleave_w_offset(uint8_t *input, 
                                                uint8_t *output, 
                                                uint16_t *interleaver, 

lib/include/srslte/phy/utils/mat.h

@@ -53,12 +53,17 @@ SRSLTE_API void srslte_mat_2x2_mmse_gen(cf_t y0, cf_t y1,
                                         float noise_estimate,
                                         float norm);
 
+SRSLTE_API void srslte_mat_2x2_mmse_csi_gen(cf_t y0, cf_t y1,
+                                            cf_t h00, cf_t h01, cf_t h10, cf_t h11,
+                                            cf_t *x0, cf_t *x1, float *csi0, float *csi1,
+                                            float noise_estimate,
+                                            float norm);
+
 SRSLTE_API float srslte_mat_2x2_cn(cf_t h00,
                                    cf_t h01,
                                    cf_t h10,
                                    cf_t h11);
 
-
 #ifdef LV_HAVE_SSE
 
 /* SSE implementation for complex reciprocal */
@@ -103,4 +108,114 @@ SRSLTE_API void srslte_mat_2x2_mmse_avx(__m256 y0, __m256 y1,
 
 #endif /* LV_HAVE_AVX */
 
-#endif // SRSLTE_MAT_H 
+#if SRSLTE_SIMD_CF_SIZE != 0
+
+/* Generic SIMD implementation for 2x2 determinant */
+static inline simd_cf_t srslte_mat_2x2_det_simd(simd_cf_t a00, simd_cf_t a01, simd_cf_t a10, simd_cf_t a11) {
+  return srslte_simd_cf_sub(srslte_simd_cf_prod(a00, a11), srslte_simd_cf_prod(a01, a10));
+}
+
+/* Generic SIMD implementation for Zero Forcing (ZF) solver */
+static inline void srslte_mat_2x2_zf_csi_simd(simd_cf_t y0,
+                                              simd_cf_t y1,
+                                              simd_cf_t h00,
+                                              simd_cf_t h01,
+                                              simd_cf_t h10,
+                                              simd_cf_t h11,
+                                              simd_cf_t *x0,
+                                              simd_cf_t *x1,
+                                              simd_f_t *csi0,
+                                              simd_f_t *csi1,
+                                              float norm) {
+  simd_cf_t det = srslte_mat_2x2_det_simd(h00, h01, h10, h11);
+  simd_cf_t detrec = srslte_simd_cf_mul(srslte_simd_cf_rcp(det), srslte_simd_f_set1(norm));
+
+  *x0 = srslte_simd_cf_prod(srslte_simd_cf_sub(srslte_simd_cf_prod(h11, y0), srslte_simd_cf_prod(h01, y1)), detrec);
+  *x1 = srslte_simd_cf_prod(srslte_simd_cf_sub(srslte_simd_cf_prod(h00, y1), srslte_simd_cf_prod(h10, y0)), detrec);
+
+  *csi0 = srslte_simd_f_set1(1.0f);
+  *csi1 = srslte_simd_f_set1(1.0f);
+}
+
+static inline void srslte_mat_2x2_zf_simd(simd_cf_t y0,
+                                          simd_cf_t y1,
+                                          simd_cf_t h00,
+                                          simd_cf_t h01,
+                                          simd_cf_t h10,
+                                          simd_cf_t h11,
+                                          simd_cf_t *x0,
+                                          simd_cf_t *x1,
+                                          float norm) {
+  simd_f_t csi1, csi2;
+  srslte_mat_2x2_zf_csi_simd(y0, y1, h00, h01, h10, h11, x0, x1, &csi1, &csi2, norm);
+}
+
+/* Generic SIMD implementation for Minimum Mean Squared Error (MMSE) solver */
+static inline void srslte_mat_2x2_mmse_csi_simd(simd_cf_t y0,
+                                                simd_cf_t y1,
+                                                simd_cf_t h00,
+                                                simd_cf_t h01,
+                                                simd_cf_t h10,
+                                                simd_cf_t h11,
+                                                simd_cf_t *x0,
+                                                simd_cf_t *x1,
+                                                simd_f_t *csi0,
+                                                simd_f_t *csi1,
+                                                float noise_estimate,
+                                                float norm) {
+  simd_cf_t _noise_estimate;
+  simd_f_t _norm = srslte_simd_f_set1(norm);
+
+  _noise_estimate.re = srslte_simd_f_set1(noise_estimate);
+  _noise_estimate.im = srslte_simd_f_zero();
+
+  /* 1. A = H' x H + No*/
+  simd_cf_t a00 =
+      srslte_simd_cf_add(srslte_simd_cf_add(srslte_simd_cf_conjprod(h00, h00), srslte_simd_cf_conjprod(h10, h10)),
+                         _noise_estimate);
+  simd_cf_t a01 = srslte_simd_cf_add(srslte_simd_cf_conjprod(h01, h00), srslte_simd_cf_conjprod(h11, h10));
+  simd_cf_t a10 = srslte_simd_cf_add(srslte_simd_cf_conjprod(h00, h01), srslte_simd_cf_conjprod(h10, h11));
+  simd_cf_t a11 =
+      srslte_simd_cf_add(srslte_simd_cf_add(srslte_simd_cf_conjprod(h01, h01), srslte_simd_cf_conjprod(h11, h11)),
+                         _noise_estimate);
+  simd_cf_t a_det_rcp = srslte_simd_cf_rcp(srslte_mat_2x2_det_simd(a00, a01, a10, a11));
+
+  /* 2. B = inv(H' x H + No) = inv(A) */
+  simd_cf_t _norm2 = srslte_simd_cf_mul(a_det_rcp, _norm);
+  simd_cf_t b00 = srslte_simd_cf_prod(a11, _norm2);
+  simd_cf_t b01 = srslte_simd_cf_prod(srslte_simd_cf_neg(a01), _norm2);
+  simd_cf_t b10 = srslte_simd_cf_prod(srslte_simd_cf_neg(a10), _norm2);
+  simd_cf_t b11 = srslte_simd_cf_prod(a00, _norm2);
+
+
+  /* 3. W = inv(H' x H + No) x H' = B x H' */
+  simd_cf_t w00 = srslte_simd_cf_add(srslte_simd_cf_conjprod(b00, h00), srslte_simd_cf_conjprod(b01, h01));
+  simd_cf_t w01 = srslte_simd_cf_add(srslte_simd_cf_conjprod(b00, h10), srslte_simd_cf_conjprod(b01, h11));
+  simd_cf_t w10 = srslte_simd_cf_add(srslte_simd_cf_conjprod(b10, h00), srslte_simd_cf_conjprod(b11, h01));
+  simd_cf_t w11 = srslte_simd_cf_add(srslte_simd_cf_conjprod(b10, h10), srslte_simd_cf_conjprod(b11, h11));
+
+  /* 4. X = W x Y */
+  *x0 = srslte_simd_cf_add(srslte_simd_cf_prod(y0, w00), srslte_simd_cf_prod(y1, w01));
+  *x1 = srslte_simd_cf_add(srslte_simd_cf_prod(y0, w10), srslte_simd_cf_prod(y1, w11));
+
+  /* 5. Extract CSI */
+  *csi0 = srslte_simd_f_rcp(srslte_simd_cf_re(b00));
+  *csi1 = srslte_simd_f_rcp(srslte_simd_cf_re(b11));
+}
+
+static inline void srslte_mat_2x2_mmse_simd(simd_cf_t y0,
+                                            simd_cf_t y1,
+                                            simd_cf_t h00,
+                                            simd_cf_t h01,
+                                            simd_cf_t h10,
+                                            simd_cf_t h11,
+                                            simd_cf_t *x0,
+                                            simd_cf_t *x1,
+                                            float noise_estimate,
+                                            float norm) {
+  simd_f_t csi0, csi1;
+  srslte_mat_2x2_mmse_csi_simd(y0, y1, h00, h01, h10, h11, x0, x1, &csi0, &csi1, noise_estimate, norm);
+}
+
+#endif /* SRSLTE_SIMD_CF_SIZE != 0 */
+#endif /* SRSLTE_MAT_H */

lib/include/srslte/phy/utils/simd.h

@@ -197,7 +197,7 @@ static inline simd_f_t srslte_simd_f_loadu(const float *ptr) {
 #ifdef LV_HAVE_AVX512
   return _mm512_loadu_ps(ptr);
 #else /* LV_HAVE_AVX512 */
- #ifdef LV_HAVE_AVX2
+#ifdef LV_HAVE_AVX2
   return _mm256_loadu_ps(ptr);
 #else /* LV_HAVE_AVX2 */
 #ifdef LV_HAVE_SSE
@@ -233,7 +233,7 @@ static inline void srslte_simd_f_storeu(float *ptr, simd_f_t simdreg) {
 #ifdef LV_HAVE_AVX512
   _mm512_storeu_ps(ptr, simdreg);
 #else /* LV_HAVE_AVX512 */
-  #ifdef LV_HAVE_AVX2
+#ifdef LV_HAVE_AVX2
   _mm256_storeu_ps(ptr, simdreg);
 #else /* LV_HAVE_AVX2 */
 #ifdef LV_HAVE_SSE
@@ -443,7 +443,7 @@ static inline simd_f_t srslte_simd_f_sqrt(simd_f_t a) {
 #ifdef LV_HAVE_AVX512
   return _mm512_sqrt_ps(a);
 #else /* LV_HAVE_AVX512 */
-  #ifdef LV_HAVE_AVX2
+#ifdef LV_HAVE_AVX2
   return _mm256_sqrt_ps(a);
 #else /* LV_HAVE_AVX2 */
   #ifdef LV_HAVE_SSE
@@ -464,18 +464,53 @@ static inline simd_f_t srslte_simd_f_sqrt(simd_f_t a) {
 #endif /* LV_HAVE_AVX512 */
 }
 
+static inline simd_f_t srslte_simd_f_neg(simd_f_t a) {
+#ifdef LV_HAVE_AVX512
+  return _mm512_xor_ps(_mm512_set1_ps(-0.0f), a);
+#else /* LV_HAVE_AVX512 */
+#ifdef LV_HAVE_AVX2
+  return _mm256_xor_ps(_mm256_set1_ps(-0.0f), a);
+#else /* LV_HAVE_AVX2 */
+  #ifdef LV_HAVE_SSE
+  return _mm_xor_ps(_mm_set1_ps(-0.0f), a);
+#else /* LV_HAVE_SSE */
+#ifdef HAVE_NEON
+  return vnegq_f32(a);
+#endif /* HAVE_NEON */
+#endif /* LV_HAVE_SSE */
+#endif /* LV_HAVE_AVX2 */
+#endif /* LV_HAVE_AVX512 */
+}
+
+static inline simd_f_t srslte_simd_f_neg_mask(simd_f_t a, simd_f_t mask) {
+#ifdef LV_HAVE_AVX512
+  return _mm512_xor_ps(mask, a);
+#else /* LV_HAVE_AVX512 */
+#ifdef LV_HAVE_AVX2
+  return _mm256_xor_ps(mask, a);
+#else /* LV_HAVE_AVX2 */
+  #ifdef LV_HAVE_SSE
+  return _mm_xor_ps(mask, a);
+#else /* LV_HAVE_SSE */
+#ifdef HAVE_NEON
+  return (float32x4_t) veorq_s32((int32x4_t) a, (int32x4_t) mask);
+#endif /* HAVE_NEON */
+#endif /* LV_HAVE_SSE */
+#endif /* LV_HAVE_AVX2 */
+#endif /* LV_HAVE_AVX512 */
+}
+
 #endif /* SRSLTE_SIMD_F_SIZE */
 
 
 #if SRSLTE_SIMD_CF_SIZE
 
 #ifdef HAVE_NEON
-   typedef float32x4x2_t simd_cf_t;
+typedef float32x4x2_t simd_cf_t;
 #else
 typedef struct {
   simd_f_t re;
   simd_f_t im;
-  
 } simd_cf_t;
 #endif
 
@@ -667,8 +702,8 @@ static inline void srslte_simd_cf_store(float *re, float *im, simd_cf_t simdreg)
   _mm512_store_ps(im, simdreg.im);
 #else /* LV_HAVE_AVX512 */
 #ifdef LV_HAVE_AVX2
-  _mm256_store_ps((float *) re, simdreg.re);
+  _mm256_store_ps(re, simdreg.re);
-  _mm256_store_ps((float *) im, simdreg.im);
+  _mm256_store_ps(im, simdreg.im);
 #else /* LV_HAVE_AVX512 */
 #ifdef LV_HAVE_SSE
   _mm_store_ps((float *) re, simdreg.re);
@@ -689,8 +724,8 @@ static inline void srslte_simd_cf_storeu(float *re, float *im, simd_cf_t simdreg
   _mm512_storeu_ps(im, simdreg.im);
 #else /* LV_HAVE_AVX512 */
 #ifdef LV_HAVE_AVX2
-  _mm256_storeu_ps((float *) re, simdreg.re);
+  _mm256_storeu_ps(re, simdreg.re);
-  _mm256_storeu_ps((float *) im, simdreg.im);
+  _mm256_storeu_ps(im, simdreg.im);
 #else /* LV_HAVE_AVX512 */
 #ifdef LV_HAVE_SSE
   _mm_storeu_ps((float *) re, simdreg.re);
@@ -833,6 +868,30 @@ static inline simd_cf_t srslte_simd_cf_add (simd_cf_t a, simd_cf_t b) {
   return ret;
 }
 
+static inline simd_cf_t srslte_simd_cf_sub (simd_cf_t a, simd_cf_t b) {
+  simd_cf_t ret;
+#ifdef LV_HAVE_AVX512
+  ret.re = _mm512_sub_ps(a.re, b.re);
+  ret.im = _mm512_sub_ps(a.im, b.im);
+#else /* LV_HAVE_AVX512 */
+#ifdef LV_HAVE_AVX2
+  ret.re = _mm256_sub_ps(a.re, b.re);
+  ret.im = _mm256_sub_ps(a.im, b.im);
+#else /* LV_HAVE_AVX2 */
+  #ifdef LV_HAVE_SSE
+  ret.re = _mm_sub_ps(a.re, b.re);
+  ret.im = _mm_sub_ps(a.im, b.im);
+#else /* LV_HAVE_SSE */
+#ifdef HAVE_NEON
+  ret.val[0] = vsubq_f32(a.val[0],b.val[0]);
+  ret.val[1] = vsubq_f32(a.val[1],b.val[1]);
+#endif /* HAVE_NEON */
+#endif /* LV_HAVE_SSE */
+#endif /* LV_HAVE_AVX2 */
+#endif /* LV_HAVE_AVX512 */
+  return ret;
+}
+
 static inline simd_cf_t srslte_simd_cf_mul (simd_cf_t a, simd_f_t b) {
   simd_cf_t ret;
 #ifdef LV_HAVE_AVX512
@@ -902,6 +961,59 @@ static inline simd_cf_t srslte_simd_cf_rcp (simd_cf_t a) {
   return ret;
 }
 
+static inline simd_cf_t srslte_simd_cf_neg (simd_cf_t a) {
+  simd_cf_t ret;
+#if LV_HAVE_NEON
+  ret.val[0] = srslte_simd_f_neg(a.val[0]);
+  ret.val[1] = srslte_simd_f_neg(a.val[1]);
+#else  /* LV_HAVE_NEON */
+  ret.re = srslte_simd_f_neg(a.re);
+  ret.im = srslte_simd_f_neg(a.im);
+#endif /* LV_HAVE_NEON */
+  return ret;
+}
+
+static inline simd_cf_t srslte_simd_cf_neg_mask (simd_cf_t a, simd_f_t mask) {
+  simd_cf_t ret;
+#ifndef LV_HAVE_AVX512
+#ifdef LV_HAVE_AVX2
+  mask = _mm256_permutevar8x32_ps(mask, _mm256_setr_epi32(0,4,1,5,2,6,3,7));
+#endif /* LV_HAVE_AVX2 */
+#endif /* LV_HAVE_AVX512 */
+#if LV_HAVE_NEON
+  ret.val[0] = srslte_simd_f_neg_mask(a.val[0], mask);
+  ret.val[1] = srslte_simd_f_neg_mask(a.val[1], mask);
+#else /* LV_HAVE_NEON */
+  ret.re = srslte_simd_f_neg_mask(a.re, mask);
+  ret.im = srslte_simd_f_neg_mask(a.im, mask);
+#endif /* LV_HAVE_NEON */
+  return ret;
+}
+
+static inline simd_cf_t srslte_simd_cf_conj (simd_cf_t a) {
+  simd_cf_t ret;
+#if LV_HAVE_NEON
+  ret.val[0] = a.val[0];
+  ret.val[1] = srslte_simd_f_neg(a.val[1]);
+#else /* LV_HAVE_NEON */
+  ret.re = a.re;
+  ret.im = srslte_simd_f_neg(a.im);
+#endif /* LV_HAVE_NEON */
+  return ret;
+}
+
+static inline simd_cf_t srslte_simd_cf_mulj (simd_cf_t a) {
+  simd_cf_t ret;
+#if LV_HAVE_NEON
+  ret.val[0] = srslte_simd_f_neg(a.val[1]);
+  ret.val[1] = a.val[0];
+#else /* LV_HAVE_NEON */
+  ret.re = srslte_simd_f_neg(a.im);
+  ret.im = a.re;
+#endif /* LV_HAVE_NEON */
+  return ret;
+}
+
 static inline simd_cf_t srslte_simd_cf_zero (void) {
   simd_cf_t ret;
 #ifdef LV_HAVE_AVX512
@@ -1115,7 +1227,7 @@ static inline simd_s_t srslte_simd_s_loadu(const int16_t *ptr) {
 #ifdef LV_HAVE_AVX512
   return _mm512_loadu_si512(ptr);
 #else /* LV_HAVE_AVX512 */
-  #ifdef LV_HAVE_AVX2
+#ifdef LV_HAVE_AVX2
   return _mm256_loadu_si256((__m256i*) ptr);
 #else /* LV_HAVE_AVX2 */
 #ifdef LV_HAVE_SSE

lib/include/srslte/phy/utils/vector.h

@@ -99,6 +99,7 @@ SRSLTE_API void srslte_vec_convert_fi(const float *x, const float scale, int16_t
 SRSLTE_API void srslte_vec_convert_if(const int16_t *x, const float scale, float *z, const uint32_t len);
 
 SRSLTE_API void srslte_vec_lut_sss(const short *x, const unsigned short *lut, short *y, const uint32_t len);
+SRSLTE_API void srslte_vec_lut_sis(const short *x, const unsigned int *lut, short *y, const uint32_t len);
 
 /* vector product (element-wise) */
 SRSLTE_API void srslte_vec_prod_ccc(const cf_t *x, const cf_t *y, cf_t *z, const uint32_t len);

lib/include/srslte/radio/radio.h

@@ -42,20 +42,18 @@ typedef struct {
   float rx_corr_dc_phase;
   float rx_corr_iq_i;
   float rx_corr_iq_q;
-}rf_cal_t; 
+} rf_cal_t;
-
 
 namespace srslte {
 
 /* Interface to the RF frontend. 
   */
-  class radio
+class radio {
-  {
  public:
-      radio() : tr_local_time(1024*10), tr_usrp_time(1024*10), tr_tx_time(1024*10), tr_is_eob(1024*10) {
+  radio() : tr_local_time(1024 * 10), tr_usrp_time(1024 * 10), tr_tx_time(1024 * 10), tr_is_eob(1024 * 10) {
     bzero(&rf_device, sizeof(srslte_rf_t));
     bzero(&end_of_burst_time, sizeof(srslte_timestamp_t));
-        bzero(zeros, burst_preamble_max_samples*sizeof(cf_t));
+    bzero(zeros, burst_preamble_max_samples * sizeof(cf_t));
 
     burst_preamble_sec = 0;
     is_start_of_burst = false;
@@ -74,6 +72,7 @@ namespace srslte {
     agc_enabled = false;
     radio_is_streaming = false;
     is_initialized = false;
+    continuous_tx = false;
   };
 
   bool init(char *args = NULL, char *devname = NULL, uint32_t nof_channels = 1);
@@ -87,6 +86,9 @@ namespace srslte {
 
   void set_manual_calibration(rf_cal_t *calibration);
 
+  bool is_continuous_tx();
+  void set_continuous_tx(bool enable);
+
   void get_time(srslte_timestamp_t *now);
   bool tx_single(void *buffer, uint32_t nof_samples, srslte_timestamp_t tx_time);
   bool tx(void *buffer[SRSLTE_MAX_PORTS], uint32_t nof_samples, srslte_timestamp_t tx_time);
@@ -136,7 +138,6 @@ namespace srslte {
 
   srslte_rf_t rf_device;
 
-      
   const static uint32_t burst_preamble_max_samples = 30720000;  // 30.72 MHz is maximum frequency
   double burst_preamble_sec;// Start of burst preamble time (off->on RF transition time)
   srslte_timestamp_t end_of_burst_time;
@@ -152,9 +153,9 @@ namespace srslte {
   // Define default values for known radios
   bool tx_adv_auto;
   bool tx_adv_negative;
-      const static double uhd_default_burst_preamble_sec = 600*1e-6;
+  const static double uhd_default_burst_preamble_sec = 600 * 1e-6;
   const static double uhd_default_tx_adv_samples = 98;
-      const static double uhd_default_tx_adv_offset_sec  = 4*1e-6; 
+  const static double uhd_default_tx_adv_offset_sec = 4 * 1e-6;
 
   const static double blade_default_burst_preamble_sec = 0.0;
   const static double blade_default_tx_adv_samples = 27;
@@ -170,14 +171,15 @@ namespace srslte {
   uint32_t tti;
   bool agc_enabled;
 
-      bool is_initialized = true;;
+  bool continuous_tx;
+  bool is_initialized;
   bool radio_is_streaming;
 
   uint32_t saved_nof_channels;
   char saved_args[128];
   char saved_devname[128];
 
-  }; 
+};
 }
 
 #endif // SRSLTE_RADIO_H

lib/include/srslte/upper/pdcp_entity.h

@@ -32,7 +32,6 @@
 #include "srslte/common/common.h"
 #include "srslte/interfaces/ue_interfaces.h"
 #include "srslte/common/security.h"
-#include "srslte/common/msg_queue.h"
 #include "srslte/common/threads.h"
 
 

lib/include/srslte/upper/rlc.h

@@ -31,7 +31,6 @@
 #include "srslte/common/log.h"
 #include "srslte/common/common.h"
 #include "srslte/interfaces/ue_interfaces.h"
-#include "srslte/common/msg_queue.h"
 #include "srslte/upper/rlc_entity.h"
 #include "srslte/upper/rlc_metrics.h"
 #include "srslte/upper/rlc_common.h"

lib/src/asn1/liblte_mme.cc

@@ -2225,14 +2225,14 @@ LIBLTE_ERROR_ENUM liblte_mme_pack_network_name_ie(LIBLTE_MME_NETWORK_NAME_STRUCT
     uint32             i;
     uint32             bit_offset;
     uint32             byte_offset;
-    const char        *char_str = net_name->name.c_str();
+    const char        *char_str = net_name->name;
 
     if(net_name != NULL &&
        ie_ptr   != NULL)
     {
         bit_offset  = 0;
         byte_offset = 2;
-        for(i=0; i<net_name->name.size(); i++)
+        for(i=0; i<strnlen(char_str, LIBLTE_STRING_LEN); i++)
         {
             if(char_str[i]  == 0x0A  ||
                char_str[i]  == 0x0D  ||
@@ -2319,6 +2319,7 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_network_name_ie(uint8
     uint32            N_bytes;
     uint8             spare_field;
     char              tmp_char;
+    uint32            str_cnt;
 
     if(ie_ptr   != NULL &&
        net_name != NULL)
@@ -2328,8 +2329,9 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_network_name_ie(uint8
         N_bytes          = (*ie_ptr)[0];
         bit_offset       = 0;
         byte_offset      = 2;
-        net_name->name   = "";
+        str_cnt          = 0;
-        while(byte_offset < N_bytes)
+
+        while(byte_offset < N_bytes && str_cnt < LIBLTE_STRING_LEN)
         {
             switch(bit_offset)
             {
@@ -2389,7 +2391,10 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_network_name_ie(uint8
                (tmp_char >= 0x61  &&
                 tmp_char <= 0x7A))
             {
-                net_name->name += tmp_char;
+                if (str_cnt < LIBLTE_STRING_LEN) {
+                    net_name->name[str_cnt] = tmp_char;
+                    str_cnt++;
+                }
             }
         }
 
@@ -2412,10 +2417,18 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_network_name_ie(uint8
                (tmp_char >= 0x61  &&
                 tmp_char <= 0x7A))
             {
-                net_name->name += tmp_char;
+                if (str_cnt < LIBLTE_STRING_LEN) {
+                    net_name->name[str_cnt] = tmp_char;
+                    str_cnt++;
+                }
             }
         }
 
+        if (str_cnt < LIBLTE_STRING_LEN) {
+            net_name->name[str_cnt] = '\0';
+            str_cnt++;
+        }
+
         *ie_ptr += byte_offset + 1;
 
         err = LIBLTE_SUCCESS;
@@ -3765,12 +3778,12 @@ LIBLTE_ERROR_ENUM liblte_mme_pack_access_point_name_ie(LIBLTE_MME_ACCESS_POINT_N
     if(apn    != NULL &&
        ie_ptr != NULL)
     {
-        apn_str      = apn->apn.c_str();
+        apn_str      = apn->apn;
-        (*ie_ptr)[0] = apn->apn.length()+1;
+        (*ie_ptr)[0] = strnlen(apn->apn, LIBLTE_STRING_LEN)+1;
         len_idx      = 0;
         apn_idx      = 0;
         label_len    = 0;
-        while(apn->apn.length() > apn_idx)
+        while(strnlen(apn->apn, LIBLTE_STRING_LEN) > apn_idx)
         {
             (*ie_ptr)[1+apn_idx+1] = (uint8)apn_str[apn_idx];
             apn_idx++;
@@ -3785,7 +3798,7 @@ LIBLTE_ERROR_ENUM liblte_mme_pack_access_point_name_ie(LIBLTE_MME_ACCESS_POINT_N
             }
         }
         (*ie_ptr)[1+len_idx]  = label_len;
-        *ie_ptr              += apn->apn.length() + 2;
+        *ie_ptr              += strnlen(apn->apn, LIBLTE_STRING_LEN) + 2;
 
         err = LIBLTE_SUCCESS;
     }
@@ -3799,26 +3812,31 @@ LIBLTE_ERROR_ENUM liblte_mme_unpack_access_point_name_ie(uint8
     uint32            i;
     uint32            ie_idx;
     uint32            label_len;
+    uint32            str_cnt;
 
     if(ie_ptr != NULL &&
        apn    != NULL)
     {
-        apn->apn.clear();
         ie_idx = 0;
-        while(ie_idx < (*ie_ptr)[0])
+        str_cnt = 0;
+        while(ie_idx < (*ie_ptr)[0] && str_cnt < LIBLTE_STRING_LEN)
         {
             label_len = (*ie_ptr)[1+ie_idx];
-            for(i=0; i<label_len; i++)
+            for(i=0; i<label_len && str_cnt < LIBLTE_STRING_LEN; i++)
             {
-                apn->apn += (char)((*ie_ptr)[1+ie_idx+i+1]);
+                apn->apn[str_cnt] = (char)((*ie_ptr)[1+ie_idx+i+1]);
+                str_cnt++;
             }
             ie_idx += label_len + 1;
-            if(ie_idx < (*ie_ptr)[0])
+            if(ie_idx < (*ie_ptr)[0] && str_cnt < LIBLTE_STRING_LEN)
             {
-                apn->apn += '.';
+                apn->apn[str_cnt] = '.';
+                str_cnt++;
+            }
         }
+        if (str_cnt < LIBLTE_STRING_LEN) {
+            apn->apn[str_cnt] = '\0';
         }
-        apn->apn += "\0";
         *ie_ptr  += (*ie_ptr)[0] + 1;
 
         err = LIBLTE_SUCCESS;

lib/src/asn1/liblte_rrc.cc

@@ -380,7 +380,7 @@ LIBLTE_ERROR_ENUM liblte_rrc_unpack_c_rnti_ie(uint8  **ie_ptr,
 
     Document Reference: 36.331 v10.0.0 Section 6.3.6
 *********************************************************************/
-LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_cdma2000_ie(LIBLTE_SIMPLE_BYTE_MSG_STRUCT  *ded_info_cdma2000,
+LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_cdma2000_ie(LIBLTE_BYTE_MSG_STRUCT  *ded_info_cdma2000,
                                                              uint8                         **ie_ptr)
 {
     LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
@@ -412,7 +412,7 @@ LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_cdma2000_ie(LIBLTE_SIMPLE_BYTE_
     return(err);
 }
 LIBLTE_ERROR_ENUM liblte_rrc_unpack_dedicated_info_cdma2000_ie(uint8                         **ie_ptr,
-                                                               LIBLTE_SIMPLE_BYTE_MSG_STRUCT  *ded_info_cdma2000)
+                                                               LIBLTE_BYTE_MSG_STRUCT  *ded_info_cdma2000)
 {
     LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
     uint32            i;
@@ -452,7 +452,7 @@ LIBLTE_ERROR_ENUM liblte_rrc_unpack_dedicated_info_cdma2000_ie(uint8
 
     Document Reference: 36.331 v10.0.0 Section 6.3.6
 *********************************************************************/
-LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_nas_ie(LIBLTE_SIMPLE_BYTE_MSG_STRUCT  *ded_info_nas,
+LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_nas_ie(LIBLTE_BYTE_MSG_STRUCT  *ded_info_nas,
                                                         uint8                         **ie_ptr)
 {
     LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
@@ -484,7 +484,7 @@ LIBLTE_ERROR_ENUM liblte_rrc_pack_dedicated_info_nas_ie(LIBLTE_SIMPLE_BYTE_MSG_S
     return(err);
 }
 LIBLTE_ERROR_ENUM liblte_rrc_unpack_dedicated_info_nas_ie(uint8                         **ie_ptr,
-                                                          LIBLTE_SIMPLE_BYTE_MSG_STRUCT  *ded_info_nas)
+                                                          LIBLTE_BYTE_MSG_STRUCT  *ded_info_nas)
 {
     LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
     uint32            i;
@@ -2715,8 +2715,10 @@ LIBLTE_ERROR_ENUM liblte_rrc_pack_report_config_eutra_ie(LIBLTE_RRC_REPORT_CONFI
         liblte_value_2_bits(rep_cnfg_eutra->trigger_type, ie_ptr, 1);
         if(LIBLTE_RRC_TRIGGER_TYPE_EUTRA_EVENT == rep_cnfg_eutra->trigger_type)
         {
+            // Event ID choice extension indicator
+            liblte_value_2_bits(0, ie_ptr, 1); // Choice with extension - unlikely to be >63 choices
+
             // Event ID
-            // FIXME: Handle extension properly
             liblte_value_2_bits(rep_cnfg_eutra->event.event_id, ie_ptr, 3);
             if(LIBLTE_RRC_EVENT_ID_EUTRA_A1 == rep_cnfg_eutra->event.event_id)
             {

lib/src/common/log_filter.cc

@@ -136,7 +136,7 @@ void log_filter::all_log(srslte::LOG_LEVEL_ENUM level,
 }
 
 void log_filter::console(const char * message, ...) {
-  char     *args_msg;
+  char     *args_msg = NULL;
   va_list   args;
   va_start(args, message);
   if(vasprintf(&args_msg, message, args) > 0)
@@ -147,7 +147,7 @@ void log_filter::console(const char * message, ...) {
 
 void log_filter::error(const char * message, ...) {
   if (level >= LOG_LEVEL_ERROR) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -158,7 +158,7 @@ void log_filter::error(const char * message, ...) {
 }
 void log_filter::warning(const char * message, ...) {
   if (level >= LOG_LEVEL_WARNING) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -169,7 +169,7 @@ void log_filter::warning(const char * message, ...) {
 }
 void log_filter::info(const char * message, ...) {
   if (level >= LOG_LEVEL_INFO) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -180,7 +180,7 @@ void log_filter::info(const char * message, ...) {
 }
 void log_filter::debug(const char * message, ...) {
   if (level >= LOG_LEVEL_DEBUG) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -192,7 +192,7 @@ void log_filter::debug(const char * message, ...) {
 
 void log_filter::error_hex(const uint8_t *hex, int size, const char * message, ...) {
   if (level >= LOG_LEVEL_ERROR) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -203,7 +203,7 @@ void log_filter::error_hex(const uint8_t *hex, int size, const char * message, .
 }
 void log_filter::warning_hex(const uint8_t *hex, int size, const char * message, ...) {
   if (level >= LOG_LEVEL_WARNING) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -214,7 +214,7 @@ void log_filter::warning_hex(const uint8_t *hex, int size, const char * message,
 }
 void log_filter::info_hex(const uint8_t *hex, int size, const char * message, ...) {
   if (level >= LOG_LEVEL_INFO) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)
@@ -225,7 +225,7 @@ void log_filter::info_hex(const uint8_t *hex, int size, const char * message, ..
 }
 void log_filter::debug_hex(const uint8_t *hex, int size, const char * message, ...) {
   if (level >= LOG_LEVEL_DEBUG) {
-    char     *args_msg;
+    char     *args_msg = NULL;
     va_list   args;
     va_start(args, message);
     if(vasprintf(&args_msg, message, args) > 0)

lib/src/common/pdu_queue.cc

@@ -74,12 +74,13 @@ void pdu_queue::deallocate(uint8_t* pdu)
  * This function enqueues the packet and returns quicly because ACK 
  * deadline is important here. 
  */ 
-void pdu_queue::push(uint8_t *ptr, uint32_t len, uint32_t tstamp)
+void pdu_queue::push(uint8_t *ptr, uint32_t len, channel_t channel, uint32_t tstamp)
 {
   if (ptr) {
     pdu_t *pdu  = (pdu_t*) ptr;
     pdu->len    = len;
     pdu->tstamp = tstamp;
+    pdu->channel = channel;
     pdu_q.push(pdu);
   } else {
     log_h->warning("Error pushing pdu: ptr is empty\n");
@@ -93,11 +94,13 @@ bool pdu_queue::process_pdus()
   pdu_t *pdu;
   while(pdu_q.try_pop(&pdu)) {
     if (callback) {
-      callback->process_pdu(pdu->ptr, pdu->len, pdu->tstamp);
+      callback->process_pdu(pdu->ptr, pdu->len, pdu->channel, pdu->tstamp);
     }
+    if (pdu->channel == DCH) {
       if (!pool.deallocate(pdu)) {
         log_h->warning("Error deallocating from buffer pool in process_pdus(): buffer not created in this pool.\n");
       }
+    }
     cnt++;
     have_data = true;
   }

lib/src/phy/ch_estimation/chest_dl.c

@@ -155,6 +155,7 @@ int srslte_chest_dl_init(srslte_chest_dl_t *q, uint32_t max_prb)
 
     q->rsrp_neighbour = false;
 
+    q->smooth_filter_auto = false;
     q->smooth_filter_len = 3; 
     srslte_chest_dl_set_smooth_filter3_coeff(q, 0.1);
     
@@ -263,41 +264,66 @@ int srslte_chest_dl_set_cell(srslte_chest_dl_t *q, srslte_cell_t cell)
 /* Uses the difference between the averaged and non-averaged pilot estimates */
 static float estimate_noise_pilots(srslte_chest_dl_t *q, uint32_t port_id, srslte_sf_t ch_mode)
 {
-  int nref=SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id);
+  const float weight = 1.0f;
+  float sum_power = 0.0f;
+  uint32_t count = 0;
+  uint32_t npilots = SRSLTE_REFSIGNAL_NUM_SF(q->cell.nof_prb, port_id);
+  uint32_t nsymbols =
+      (ch_mode == SRSLTE_SF_MBSFN) ? srslte_refsignal_mbsfn_nof_symbols() : srslte_refsignal_cs_nof_symbols(port_id);
+  uint32_t nref = npilots / nsymbols;
+  uint32_t fidx = srslte_refsignal_cs_fidx(q->cell, 0, port_id, 0);
 
-  if (q->average_subframe) {
+  cf_t *input2d[nsymbols + 2];
-    if (ch_mode == SRSLTE_SF_MBSFN) {
+  cf_t *tmp_noise = q->tmp_noise;
-      nref /= 4;
+
-    } else {
+  for (int i = 0; i < nsymbols; i++) {
-      nref /= 2;
+    input2d[i + 1] = &q->pilot_estimates[i * nref];
   }
+
+  input2d[0] = &q->tmp_noise[0];
+  if (nsymbols > 3) {
+    srslte_vec_sc_prod_cfc(input2d[2], 2.0f, input2d[0], nref);
+    srslte_vec_sub_ccc(input2d[0], input2d[4], input2d[0], nref);
+  } else {
+    srslte_vec_sc_prod_cfc(input2d[2], 1.0f, input2d[0], nref);
   }
 
-  /* Substract noisy pilot estimates */
+  input2d[nsymbols + 1] = &q->tmp_noise[nref];
-  srslte_vec_sub_ccc(q->pilot_estimates_average, q->pilot_estimates, q->tmp_noise, nref);  
+  if (nsymbols > 3) {
+    srslte_vec_sc_prod_cfc(input2d[nsymbols - 1], 2.0f, input2d[nsymbols + 1], nref);
+    srslte_vec_sub_ccc(input2d[nsymbols + 1], input2d[nsymbols - 3], input2d[nsymbols + 1], nref);
+  } else {
+    srslte_vec_sc_prod_cfc(input2d[nsymbols - 1], 1.0f, input2d[nsymbols + 1], nref);
+  }
 
-#ifdef FREQ_SEL_SNR
+  for (int i = 1; i < nsymbols + 1; i++) {
-  /* Compute frequency-selective SNR */
+    uint32_t offset = ((fidx < 3) ^ (i & 1)) ? 0 : 1;
-  srslte_vec_abs_square_cf(q->tmp_noise, q->snr_vector, nref);
+    srslte_vec_sc_prod_cfc(input2d[i], weight, tmp_noise, nref);
-  srslte_vec_abs_square_cf(q->pilot_estimates, q->pilot_power, nref);
-  srslte_vec_div_fff(q->pilot_power, q->snr_vector, q->snr_vector, nref);
 
-  srslte_vec_fprint_f(stdout, q->snr_vector, nref);
+    srslte_vec_sum_ccc(&input2d[i - 1][0], &tmp_noise[offset], &tmp_noise[offset], nref - offset);
-#endif
+    srslte_vec_sum_ccc(&input2d[i - 1][1 - offset], &tmp_noise[0], &tmp_noise[0], nref + offset - 1);
+    if (offset) {
+      tmp_noise[0] += 2.0f * input2d[i - 1][0] - input2d[i - 1][1];
+    } else {
+      tmp_noise[nref - 1] += 2.0f * input2d[i - 1][nref - 2] - input2d[i - 1][nref - 1];
+    }
 
-  /* Compute average power. Normalized for filter len 3 using matlab */
+    srslte_vec_sum_ccc(&input2d[i + 1][0], &tmp_noise[offset], &tmp_noise[offset], nref - offset);
-  float norm  = 1;
+    srslte_vec_sum_ccc(&input2d[i + 1][1 - offset], &tmp_noise[0], &tmp_noise[0], nref + offset - 1);
-  if (q->average_subframe) {
+    if (offset) {
-    norm = 32;
+      tmp_noise[0] += 2.0f * input2d[i + 1][0] - input2d[i + 1][1];
     } else {
-    if (q->smooth_filter_len == 3) {
+      tmp_noise[nref - 1] += 2.0f * input2d[i + 1][nref - 2] - input2d[i + 1][nref - 1];
-      float a = q->smooth_filter[0];
-      float norm3 = 6.143*a*a+0.04859*a-0.002774;
-      norm /= norm3;
     }
+
+    srslte_vec_sc_prod_cfc(tmp_noise, 1.0f / (weight + 4.0f), tmp_noise, nref);
+
+    srslte_vec_sub_ccc(input2d[i], tmp_noise, tmp_noise, nref);
+    sum_power = srslte_vec_avg_power_cf(tmp_noise, nref);
+    count++;
   }
-  float power = norm*srslte_vec_avg_power_cf(q->tmp_noise, nref);
+
-  return power; 
+  return sum_power / (float) count * sqrtf(weight + 4.0f);
 }
 
 static float estimate_noise_pss(srslte_chest_dl_t *q, cf_t *input, cf_t *ce) 
@@ -443,6 +469,53 @@ void srslte_chest_dl_set_smooth_filter3_coeff(srslte_chest_dl_t* q, float w)
   q->smooth_filter[1] = 1-2*w; 
 }
 
+void srslte_chest_dl_set_smooth_filter_gauss(srslte_chest_dl_t* q, uint32_t order, float std_dev)
+{
+  const uint32_t filterlen = order + 1;
+  const int center = (filterlen - 1) / 2;
+  float *filter = q->smooth_filter;
+  float norm_p = 0.0f;
+
+  if (filterlen) {
+
+    for (int i = 0; i < filterlen; i++) {
+      filter[i] = expf(-powf(i - center, 2) / (2.0f * powf(std_dev, 2)));
+      norm_p += powf(filter[i], 2);
+    }
+
+    const float norm = srslte_vec_acc_ff(filter, filterlen);
+
+    srslte_vec_sc_prod_fff(filter, 1.0f / norm, filter, filterlen);
+    q->smooth_filter_len = filterlen;
+  }
+}
+
+void srslte_chest_dl_set_smooth_filter_auto(srslte_chest_dl_t *q, bool enable) {
+  q->smooth_filter_auto = enable;
+}
+
+uint32_t srslte_chest_dl_interleave_pilots(srslte_chest_dl_t *q, cf_t *input, cf_t *tmp, cf_t *output, uint32_t port_id, srslte_sf_t ch_mode) {
+  uint32_t nsymbols = (ch_mode == SRSLTE_SF_MBSFN)?srslte_refsignal_mbsfn_nof_symbols(port_id):srslte_refsignal_cs_nof_symbols(port_id);
+  uint32_t nref = (ch_mode == SRSLTE_SF_MBSFN)?6*q->cell.nof_prb:2*q->cell.nof_prb;
+
+  if (srslte_refsignal_cs_fidx(q->cell, 0, port_id, 0) < 3) {
+    srslte_vec_interleave(input, &input[nref], tmp, nref);
+    for (int l = 2; l < nsymbols - 1; l += 2) {
+      srslte_vec_interleave_add(&input[l * nref], &input[(l + 1) * nref], tmp, nref);
+    }
+  } else {
+    srslte_vec_interleave(&input[nref], input, tmp, nref);
+    for (int l = 2; l < nsymbols - 1; l += 2) {
+      srslte_vec_interleave_add(&input[(l + 1) * nref], &input[l * nref], tmp, nref);
+    }
+  }
+
+  nref *= 2;
+  srslte_vec_sc_prod_cfc(tmp, 2.0f / nsymbols, output, nref);
+
+  return nref;
+}
+
 static void average_pilots(srslte_chest_dl_t *q, cf_t *input, cf_t *output, uint32_t port_id, srslte_sf_t ch_mode)  {
   uint32_t nsymbols = (ch_mode == SRSLTE_SF_MBSFN)?srslte_refsignal_mbsfn_nof_symbols(port_id):srslte_refsignal_cs_nof_symbols(port_id);
   uint32_t nref = (ch_mode == SRSLTE_SF_MBSFN)?6*q->cell.nof_prb:2*q->cell.nof_prb;
@@ -523,7 +596,16 @@ void chest_interpolate_noise_est(srslte_chest_dl_t *q, cf_t *input, cf_t *ce, ui
     q->cfo = chest_estimate_cfo(q);
   }
 
+  /* Estimate noise */
+  if (q->noise_alg == SRSLTE_NOISE_ALG_REFS) {
+    q->noise_estimate[rxant_id][port_id] = estimate_noise_pilots(q, port_id, ch_mode);
+  }
+
   if (ce != NULL) {
+    if (q->smooth_filter_auto) {
+      srslte_chest_dl_set_smooth_filter_gauss(q, 4, q->noise_estimate[rxant_id][port_id] * 200.0f);
+    }
+
     /* Smooth estimates (if applicable) and interpolate */
     if (q->smooth_filter_len == 0 || (q->smooth_filter_len == 3 && q->smooth_filter[0] == 0)) {
       interpolate_pilots(q, q->pilot_estimates, ce, port_id, ch_mode);
@@ -533,13 +615,11 @@ void chest_interpolate_noise_est(srslte_chest_dl_t *q, cf_t *input, cf_t *ce, ui
     }
   
     /* Estimate noise power */
-    if (q->noise_alg == SRSLTE_NOISE_ALG_REFS && q->smooth_filter_len > 0) {
+    if (q->noise_alg == SRSLTE_NOISE_ALG_PSS) {
-      q->noise_estimate[rxant_id][port_id] = estimate_noise_pilots(q, port_id, ch_mode);
-    } else if (q->noise_alg == SRSLTE_NOISE_ALG_PSS) {
       if (sf_idx == 0 || sf_idx == 5) {
         q->noise_estimate[rxant_id][port_id] = estimate_noise_pss(q, input, ce);
       }
-    } else {
+    } else if (q->noise_alg != SRSLTE_NOISE_ALG_REFS) {
       if (sf_idx == 0 || sf_idx == 5) {
         q->noise_estimate[rxant_id][port_id] = estimate_noise_empty_sc(q, input);        
       }

lib/src/phy/mimo/layermap.c

@@ -54,7 +54,7 @@ int srslte_layermap_multiplex(cf_t *d[SRSLTE_MAX_CODEWORDS], cf_t *x[SRSLTE_MAX_
     int nof_symbols[SRSLTE_MAX_CODEWORDS]) {
   if (nof_cw == nof_layers) {
     for (int i = 0; i < nof_cw; i++) {
-      srs_vec_cf_cpy(x[i], d[i], (uint32_t) nof_symbols[0]);
+      srs_vec_cf_cpy(d[i], x[i], (uint32_t) nof_symbols[0]);
     }
     return nof_symbols[0];
   } else if (nof_cw == 1) {

lib/src/phy/phch/pcfich.c

@@ -221,7 +221,7 @@ int srslte_pcfich_decode_multi(srslte_pcfich_t *q, cf_t *sf_symbols[SRSLTE_MAX_P
       /* no need for layer demapping */
       srslte_predecoding_single_multi(q_symbols, q_ce[0], q->d, NULL, q->nof_rx_antennas, q->nof_symbols, 1.0f, noise_estimate);
     } else {
-      srslte_predecoding_diversity_multi(q_symbols, q_ce, x, q->nof_rx_antennas, q->cell.nof_ports, q->nof_symbols, 1.0f);
+      srslte_predecoding_diversity_multi(q_symbols, q_ce, x, NULL, q->nof_rx_antennas, q->cell.nof_ports, q->nof_symbols, 1.0f);
       srslte_layerdemap_diversity(x, q->d, q->cell.nof_ports, q->nof_symbols / q->cell.nof_ports);
     }
 

lib/src/phy/phch/pdcch.c

@@ -492,7 +492,7 @@ int srslte_pdcch_extract_llr_multi(srslte_pdcch_t *q, cf_t *sf_symbols[SRSLTE_MA
       /* no need for layer demapping */
       srslte_predecoding_single_multi(q->symbols, q->ce[0], q->d, NULL, q->nof_rx_antennas, nof_symbols, 1.0f, noise_estimate/2);
     } else {
-      srslte_predecoding_diversity_multi(q->symbols, q->ce, x, q->nof_rx_antennas, q->cell.nof_ports, nof_symbols, 1.0f);
+      srslte_predecoding_diversity_multi(q->symbols, q->ce, x, NULL, q->nof_rx_antennas, q->cell.nof_ports, nof_symbols, 1.0f);
       srslte_layerdemap_diversity(x, q->d, q->cell.nof_ports, nof_symbols / q->cell.nof_ports);
     }
 

lib/src/phy/phch/pdsch.c

@@ -402,7 +402,7 @@ int srslte_pdsch_enable_csi(srslte_pdsch_t *q, bool enable) {
   if (enable) {
     for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
       if (!q->csi[i]) {
-        q->csi[i] = srslte_vec_malloc(sizeof(float) * q->max_re);
+        q->csi[i] = srslte_vec_malloc(sizeof(float) * q->max_re * 2);
         if (!q->csi[i]) {
           return SRSLTE_ERROR;
         }
@@ -757,7 +757,7 @@ int srslte_pdsch_decode(srslte_pdsch_t *q,
     }
 
     // Pre-decoder
-    if (srslte_predecoding_type(q->symbols, q->ce, x, q->csi[0], q->nof_rx_antennas, q->cell.nof_ports, cfg->nof_layers,
+    if (srslte_predecoding_type(q->symbols, q->ce, x, q->csi, q->nof_rx_antennas, q->cell.nof_ports, cfg->nof_layers,
                                       cfg->codebook_idx, cfg->nbits[0].nof_re, cfg->mimo_type, pdsch_scaling, noise_estimate)<0) {
       DEBUG("Error predecoding\n");
       return SRSLTE_ERROR;

lib/src/phy/phch/phich.c

@@ -241,7 +241,7 @@ int srslte_phich_decode(srslte_phich_t *q, cf_t *sf_symbols[SRSLTE_MAX_PORTS],
     /* no need for layer demapping */
     srslte_predecoding_single_multi(q_sf_symbols, q_ce[0], q->d0, NULL, q->nof_rx_antennas, SRSLTE_PHICH_MAX_NSYMB, 1.0f, noise_estimate);
   } else {
-    srslte_predecoding_diversity_multi(q_sf_symbols, q_ce, x, q->nof_rx_antennas, q->cell.nof_ports, SRSLTE_PHICH_MAX_NSYMB, 1.0f);
+    srslte_predecoding_diversity_multi(q_sf_symbols, q_ce, x, NULL, q->nof_rx_antennas, q->cell.nof_ports, SRSLTE_PHICH_MAX_NSYMB, 1.0f);
     srslte_layerdemap_diversity(x, q->d0, q->cell.nof_ports, SRSLTE_PHICH_MAX_NSYMB / q->cell.nof_ports);
   }
   DEBUG("Recv!!: \n");

lib/src/phy/phch/sch.c

@@ -130,7 +130,7 @@ int srslte_sch_init(srslte_sch_t *q) {
       goto clean; 
     }
     bzero(q->temp_g_bits, SRSLTE_MAX_PRB*12*12*12);
-    q->ul_interleaver = srslte_vec_malloc(sizeof(uint16_t)*SRSLTE_MAX_PRB*12*12*12);
+    q->ul_interleaver = srslte_vec_malloc(sizeof(uint32_t)*SRSLTE_MAX_PRB*12*12*12);
     if (!q->ul_interleaver) {
       goto clean; 
     }
@@ -577,7 +577,7 @@ int srslte_dlsch_encode2(srslte_sch_t *q, srslte_pdsch_cfg_t *cfg, srslte_softbu
  * Profiling show that the computation of this matrix is neglegible. 
  */
 static void ulsch_interleave_gen(uint32_t H_prime_total, uint32_t N_pusch_symbs, uint32_t Qm,
-                                 uint8_t *ri_present, uint16_t *interleaver_lut)
+                                 uint8_t *ri_present, uint32_t *interleaver_lut)
 {
   uint32_t rows = H_prime_total/N_pusch_symbs;
   uint32_t cols = N_pusch_symbs;
@@ -599,7 +599,7 @@ static void ulsch_interleave_gen(uint32_t H_prime_total, uint32_t N_pusch_symbs,
 /* UL-SCH channel interleaver according to 5.2.2.8 of 36.212 */
 void ulsch_interleave(uint8_t *g_bits, uint32_t Qm, uint32_t H_prime_total, 
                       uint32_t N_pusch_symbs, uint8_t *q_bits, srslte_uci_bit_t *ri_bits, uint32_t nof_ri_bits, 
-                      uint8_t *ri_present, uint16_t *inteleaver_lut) 
+                      uint8_t *ri_present, uint32_t *inteleaver_lut)
 {
   
   // Prepare ri_bits for fast search using temp_buffer
@@ -611,7 +611,7 @@ void ulsch_interleave(uint8_t *g_bits, uint32_t Qm, uint32_t H_prime_total,
   
   // Genearate interleaver table and interleave bits
   ulsch_interleave_gen(H_prime_total, N_pusch_symbs, Qm, ri_present, inteleaver_lut); 
-  srslte_bit_interleave(g_bits, q_bits, inteleaver_lut, H_prime_total*Qm);    
+  srslte_bit_interleave_i(g_bits, q_bits, inteleaver_lut, H_prime_total*Qm);
   
   // Reset temp_buffer because will be reused next time
   if (nof_ri_bits > 0) {
@@ -624,7 +624,7 @@ void ulsch_interleave(uint8_t *g_bits, uint32_t Qm, uint32_t H_prime_total,
 /* UL-SCH channel deinterleaver according to 5.2.2.8 of 36.212 */
 void ulsch_deinterleave(int16_t *q_bits, uint32_t Qm, uint32_t H_prime_total, 
                         uint32_t N_pusch_symbs, int16_t *g_bits, srslte_uci_bit_t *ri_bits, uint32_t nof_ri_bits, 
-                        uint8_t *ri_present, uint16_t *inteleaver_lut) 
+                        uint8_t *ri_present, uint32_t *inteleaver_lut)
 {     
   // Prepare ri_bits for fast search using temp_buffer
   if (nof_ri_bits > 0) {
@@ -635,7 +635,7 @@ void ulsch_deinterleave(int16_t *q_bits, uint32_t Qm, uint32_t H_prime_total,
 
   // Generate interleaver table and interleave samples 
   ulsch_interleave_gen(H_prime_total, N_pusch_symbs, Qm, ri_present, inteleaver_lut);
-  srslte_vec_lut_sss(q_bits, inteleaver_lut, g_bits, H_prime_total*Qm);
+  srslte_vec_lut_sis(q_bits, inteleaver_lut, g_bits, H_prime_total*Qm);
 
   // Reset temp_buffer because will be reused next time
   if (nof_ri_bits > 0) {

lib/src/phy/ue/ue_sync.c

@@ -41,7 +41,7 @@
 
 #define MAX_TIME_OFFSET 128
 
-#define TRACK_MAX_LOST          4
+#define TRACK_MAX_LOST          100
 #define TRACK_FRAME_SIZE        32
 #define FIND_NOF_AVG_FRAMES     4
 #define DEFAULT_SAMPLE_OFFSET_CORRECT_PERIOD  0

lib/src/phy/utils/bit.c

@@ -205,6 +205,163 @@ void srslte_bit_interleaver_run(srslte_bit_interleaver_t *q, uint8_t *input, uin
 }
 
 
+void srslte_bit_interleave_i(uint8_t *input, uint8_t *output, uint32_t *interleaver, uint32_t nof_bits) {
+  srslte_bit_interleave_i_w_offset(input, output, interleaver, nof_bits, 0);
+}
+
+void srslte_bit_interleave_i_w_offset(uint8_t *input, uint8_t *output, uint32_t *interleaver, uint32_t nof_bits, uint32_t w_offset) {
+  uint32_t st=0, w_offset_p=0;
+  static const uint8_t mask[] = { 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 };
+
+  if (w_offset < 8 && w_offset > 0) {
+    st=1;
+    for (uint32_t j=0;j<8-w_offset;j++) {
+      uint32_t i_p = interleaver[j];
+      if (input[i_p/8] & mask[i_p%8]) {
+        output[0] |= mask[j+w_offset];
+      } else {
+        output[0] &= ~(mask[j+w_offset]);
+      }
+    }
+    w_offset_p=8-w_offset;
+  }
+
+#ifdef LV_HAVE_SSE
+  __m64 m64mask = _mm_setr_pi8((uint8_t) 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1);
+
+  union {
+    uint8_t v[8];
+    __m64 m64;
+  } a, b, c;
+
+  union {
+    __m128i m128;
+    uint16_t u32[4];
+    uint16_t u16[8];
+    uint8_t u8[16];
+    struct {
+      __m64 reg_a;
+      __m64 reg_b;
+    } m64;
+    struct {
+      uint16_t i0, i1, i2, i3, i4, i5, i6, i7;
+    } v16;
+    struct {
+      uint32_t i0, i1, i2, i3;
+    } v32;
+  } ipx1, ipx2, epx1, epx2;
+  for (uint32_t i = st; i < nof_bits / 8; i++) {
+    ipx1.m128 = _mm_loadu_si128((__m128i *) (interleaver + (i * 8 + 0) - w_offset_p));
+    epx1.m128 = _mm_shuffle_epi8(ipx1.m128, _mm_set_epi8(0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C));
+    ipx2.m128 = _mm_loadu_si128((__m128i *) (interleaver + (i * 8 + 4) - w_offset_p));
+    epx2.m128 = _mm_shuffle_epi8(ipx2.m128, _mm_set_epi8(0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C,
+                                                         0x00, 0x04, 0x08, 0x0C));
+
+    epx1.m128 = _mm_blendv_epi8(epx2.m128, epx1.m128, _mm_setr_epi8(+1, +1, +1, +1,
+                                                                    -1, -1, -1, -1,
+                                                                    +1, +1, +1, +1,
+                                                                    -1, -1, -1, -1));
+
+    b.m64 = _mm_and_si64(epx1.m64.reg_a, _mm_set1_pi8(0x7));
+    b.m64 = _mm_shuffle_pi8(m64mask, b.m64);
+
+    ipx1.m128 = _mm_srli_epi32(ipx1.m128, 3);
+    ipx2.m128 = _mm_srli_epi32(ipx2.m128, 3);
+
+    a.m64 = _mm_set_pi8(input[ipx1.v32.i0],
+                        input[ipx1.v32.i1],
+                        input[ipx1.v32.i2],
+                        input[ipx1.v32.i3],
+                        input[ipx2.v32.i0],
+                        input[ipx2.v32.i1],
+                        input[ipx2.v32.i2],
+                        input[ipx2.v32.i3]);
+
+    c.m64 = _mm_cmpeq_pi8(_mm_and_si64(a.m64, b.m64), b.m64);
+    output[i] = (uint8_t) _mm_movemask_pi8(c.m64);
+  }
+
+#if 0 /* Disabled */
+  /* THIS PIECE OF CODE IS FOR CHECKING SIMD BEHAVIOUR. DO NOT ENABLE. */
+  uint8_t *output2 = malloc(nof_bits/8);
+  for (uint32_t i=st;i<nof_bits/8;i++) {
+
+    uint16_t i_p0 = interleaver[i*8+0-w_offset_p];
+    uint16_t i_p1 = interleaver[i*8+1-w_offset_p];
+    uint16_t i_p2 = interleaver[i*8+2-w_offset_p];
+    uint16_t i_p3 = interleaver[i*8+3-w_offset_p];
+    uint16_t i_p4 = interleaver[i*8+4-w_offset_p];
+    uint16_t i_p5 = interleaver[i*8+5-w_offset_p];
+    uint16_t i_p6 = interleaver[i*8+6-w_offset_p];
+    uint16_t i_p7 = interleaver[i*8+7-w_offset_p];
+
+    uint8_t out0  = (input[i_p0/8] & mask[i_p0%8])?mask[0]:(uint8_t)0;
+    uint8_t out1  = (input[i_p1/8] & mask[i_p1%8])?mask[1]:(uint8_t)0;
+    uint8_t out2  = (input[i_p2/8] & mask[i_p2%8])?mask[2]:(uint8_t)0;
+    uint8_t out3  = (input[i_p3/8] & mask[i_p3%8])?mask[3]:(uint8_t)0;
+    uint8_t out4  = (input[i_p4/8] & mask[i_p4%8])?mask[4]:(uint8_t)0;
+    uint8_t out5  = (input[i_p5/8] & mask[i_p5%8])?mask[5]:(uint8_t)0;
+    uint8_t out6  = (input[i_p6/8] & mask[i_p6%8])?mask[6]:(uint8_t)0;
+    uint8_t out7  = (input[i_p7/8] & mask[i_p7%8])?mask[7]:(uint8_t)0;
+
+    output2[i] = out0 | out1 | out2 | out3 | out4 | out5 | out6 | out7;
+  }
+
+  for(uint32_t i = st; i < nof_bits/8; i++) {
+    if (output[i] != output2[i]) {
+      printf("%05d/%05d %02X %02X\n", i, nof_bits/8, output[i], output2[i]);
+    }
+    //output[i] = output2[i];
+  }
+  free(output2);
+#endif /* Disabled */
+#else /* LV_HAVE_SSE */
+  for (uint32_t i=st;i<nof_bits/8;i++) {
+
+    uint32_t i_p0 = interleaver[i*8+0-w_offset_p];
+    uint32_t i_p1 = interleaver[i*8+1-w_offset_p];
+    uint32_t i_p2 = interleaver[i*8+2-w_offset_p];
+    uint32_t i_p3 = interleaver[i*8+3-w_offset_p];
+    uint32_t i_p4 = interleaver[i*8+4-w_offset_p];
+    uint32_t i_p5 = interleaver[i*8+5-w_offset_p];
+    uint32_t i_p6 = interleaver[i*8+6-w_offset_p];
+    uint32_t i_p7 = interleaver[i*8+7-w_offset_p];
+
+    uint8_t out0  = (input[i_p0/8] & mask[i_p0%8])?mask[0]:0;
+    uint8_t out1  = (input[i_p1/8] & mask[i_p1%8])?mask[1]:0;
+    uint8_t out2  = (input[i_p2/8] & mask[i_p2%8])?mask[2]:0;
+    uint8_t out3  = (input[i_p3/8] & mask[i_p3%8])?mask[3]:0;
+    uint8_t out4  = (input[i_p4/8] & mask[i_p4%8])?mask[4]:0;
+    uint8_t out5  = (input[i_p5/8] & mask[i_p5%8])?mask[5]:0;
+    uint8_t out6  = (input[i_p6/8] & mask[i_p6%8])?mask[6]:0;
+    uint8_t out7  = (input[i_p7/8] & mask[i_p7%8])?mask[7]:0;
+
+    output[i] = out0 | out1 | out2 | out3 | out4 | out5 | out6 | out7;
+  }
+#endif /* LV_HAVE_SSE */
+
+  for (uint32_t j=0;j<nof_bits%8;j++) {
+    uint32_t i_p = interleaver[(nof_bits/8)*8+j-w_offset];
+    if (input[i_p/8] & mask[i_p%8]) {
+      output[nof_bits/8] |= mask[j];
+    } else {
+      output[nof_bits/8] &= ~(mask[j]);
+    }
+  }
+  for (uint32_t j=0;j<w_offset;j++) {
+    uint32_t i_p = interleaver[(nof_bits/8)*8+j-w_offset];
+    if (input[i_p/8] & (1<<(7-i_p%8))) {
+      output[nof_bits/8] |= mask[j];
+    } else {
+      output[nof_bits/8] &= ~(mask[j]);
+    }
+  }
+}
 
 void srslte_bit_interleave(uint8_t *input, uint8_t *output, uint16_t *interleaver, uint32_t nof_bits) {
   srslte_bit_interleave_w_offset(input, output, interleaver, nof_bits, 0);

lib/src/phy/utils/mat.c

@@ -60,8 +60,8 @@ inline void srslte_mat_2x2_zf_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h10
 }
 
 /* Generic implementation for Minimum Mean Squared Error (MMSE) solver */
-inline void srslte_mat_2x2_mmse_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h10, cf_t h11,
+inline void srslte_mat_2x2_mmse_csi_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h10, cf_t h11,
-                                        cf_t *x0, cf_t *x1, float noise_estimate, float norm) {
+                                        cf_t *x0, cf_t *x1, float *csi0, float *csi1, float noise_estimate, float norm) {
   /* Create conjugated matrix */
   cf_t _h00 = conjf(h00);
   cf_t _h01 = conjf(h01);
@@ -73,14 +73,14 @@ inline void srslte_mat_2x2_mmse_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h
   cf_t a01 = _h00 * h01 + _h10 * h11;
   cf_t a10 = _h01 * h00 + _h11 * h10;
   cf_t a11 = _h01 * h01 + _h11 * h11 + noise_estimate;
+  cf_t a_det_rcp = srslte_mat_cf_recip_gen(srslte_mat_2x2_det_gen(a00, a01, a10, a11));
 
   /* 2. B = inv(H' x H + No) = inv(A) */
-  cf_t b00 = a11;
+  cf_t _norm = norm * a_det_rcp;
-  cf_t b01 = -a01;
+  cf_t b00 = a11 * _norm;
-  cf_t b10 = -a10;
+  cf_t b01 = -a01 * _norm;
-  cf_t b11 = a00;
+  cf_t b10 = -a10 * _norm;
-  cf_t _norm = norm * srslte_mat_cf_recip_gen(srslte_mat_2x2_det_gen(a00, a01, a10, a11));
+  cf_t b11 = a00 * _norm;
-
 
   /* 3. W = inv(H' x H + No) x H' = B x H' */
   cf_t w00 = b00 * _h00 + b01 * _h01;
@@ -89,8 +89,19 @@ inline void srslte_mat_2x2_mmse_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h
   cf_t w11 = b10 * _h10 + b11 * _h11;
 
   /* 4. X = W x Y */
-  *x0 = (y0 * w00 + y1 * w01) * _norm;
+  *x0 = (y0 * w00 + y1 * w01);
-  *x1 = (y0 * w10 + y1 * w11) * _norm;
+  *x1 = (y0 * w10 + y1 * w11);
+
+  /* 5. Set CSI */
+  *csi0 = 1.0f / crealf(b00);
+  *csi1 = 1.0f / crealf(b11);
+}
+
+/* Generic implementation for Minimum Mean Squared Error (MMSE) solver */
+void srslte_mat_2x2_mmse_gen(cf_t y0, cf_t y1, cf_t h00, cf_t h01, cf_t h10, cf_t h11,
+                                        cf_t *x0, cf_t *x1, float noise_estimate, float norm) {
+  float csi0, csi1;
+  srslte_mat_2x2_mmse_csi_gen(y0, y1, h00, h01, h10, h11, x0, x1, &csi0, &csi1, noise_estimate, norm);
 }
 
 inline float srslte_mat_2x2_cn(cf_t h00, cf_t h01, cf_t h10, cf_t h11) {

lib/src/phy/utils/test/mat_test.c

@@ -32,8 +32,8 @@
 #include <sys/time.h>
 
 #include "srslte/phy/utils/mat.h"
-#include "srslte/phy/utils/simd.h"
 #include "srslte/phy/utils/vector.h"
+#include "srslte/phy/utils/vector_simd.h"
 
 
 bool zf_solver = false;
@@ -378,6 +378,98 @@ bool test_mmse_solver_avx(void) {
 
 #endif /* LV_HAVE_AVX */
 
+#if SRSLTE_SIMD_CF_SIZE != 0
+
+bool test_zf_solver_simd(void) {
+  cf_t cf_error0, cf_error1;
+  float error = 0.0f;
+
+  cf_t x0_gold_1 = RANDOM_CF();
+  cf_t x1_gold_1 = RANDOM_CF();
+  cf_t h00_1 = RANDOM_CF();
+  cf_t h01_1 = RANDOM_CF();
+  cf_t h10_1 = RANDOM_CF();
+  cf_t h11_1 = (1 - h01_1 * h10_1) / h00_1;
+  cf_t y0_1 = x0_gold_1 * h00_1 + x1_gold_1 * h01_1;
+  cf_t y1_1 = x0_gold_1 * h10_1 + x1_gold_1 * h11_1;
+
+  simd_cf_t _y0 = srslte_simd_cf_set1(y0_1);
+  simd_cf_t _y1 = srslte_simd_cf_set1(y1_1);
+
+  simd_cf_t _h00 = srslte_simd_cf_set1(h00_1);
+  simd_cf_t _h01 = srslte_simd_cf_set1(h01_1);
+  simd_cf_t _h10 = srslte_simd_cf_set1(h10_1);
+  simd_cf_t _h11 = srslte_simd_cf_set1(h11_1);
+
+  simd_cf_t _x0, _x1;
+
+  srslte_mat_2x2_zf_simd(_y0, _y1, _h00, _h01, _h10, _h11, &_x0, &_x1, 1.0f);
+
+  __attribute__((aligned(SRSLTE_SIMD_BIT_ALIGN))) cf_t x0[SRSLTE_SIMD_CF_SIZE];
+  __attribute__((aligned(SRSLTE_SIMD_BIT_ALIGN))) cf_t x1[SRSLTE_SIMD_CF_SIZE];
+
+  srslte_simd_cfi_store(x0, _x0);
+  srslte_simd_cfi_store(x1, _x1);
+
+  cf_error0 = x0[1] - x0_gold_1;
+  cf_error1 = x1[1] - x1_gold_1;
+  error += crealf(cf_error0) * crealf(cf_error0) + cimagf(cf_error0) * cimagf(cf_error0) +
+      crealf(cf_error1) * crealf(cf_error1) + cimagf(cf_error1) * cimagf(cf_error1);
+
+  return (error < 1e-3);
+}
+
+bool test_mmse_solver_simd(void) {
+  cf_t cf_error0, cf_error1;
+  float error = 0.0f;
+
+  cf_t x0_gold[SRSLTE_SIMD_CF_SIZE];
+  cf_t x1_gold[SRSLTE_SIMD_CF_SIZE];
+  cf_t h00[SRSLTE_SIMD_CF_SIZE];
+  cf_t h01[SRSLTE_SIMD_CF_SIZE];
+  cf_t h10[SRSLTE_SIMD_CF_SIZE];
+  cf_t h11[SRSLTE_SIMD_CF_SIZE];
+  cf_t y0[SRSLTE_SIMD_CF_SIZE];
+  cf_t y1[SRSLTE_SIMD_CF_SIZE];
+  for (int i = 0; i < SRSLTE_SIMD_CF_SIZE; i++) {
+    x0_gold[i] = RANDOM_CF();
+    x1_gold[i] = RANDOM_CF();
+    h00[i] = RANDOM_CF();
+    h01[i] = RANDOM_CF();
+    h10[i] = RANDOM_CF();
+    h11[i] = (1 - h01[i] * h10[i]) / h00[i];
+    y0[i] = x0_gold[i] * h00[i]+ x1_gold[i] * h01[i];
+    y1[i] = x0_gold[i] * h10[i] + x1_gold[i] * h11[i];
+  }
+
+  simd_cf_t _y0 = srslte_simd_cfi_loadu(y0);
+  simd_cf_t _y1 = srslte_simd_cfi_loadu(y1);
+
+  simd_cf_t _h00 = srslte_simd_cfi_loadu(h00);
+  simd_cf_t _h01 = srslte_simd_cfi_loadu(h01);
+  simd_cf_t _h10 = srslte_simd_cfi_loadu(h10);
+  simd_cf_t _h11 = srslte_simd_cfi_loadu(h11);
+
+  simd_cf_t _x0, _x1;
+
+  srslte_mat_2x2_mmse_simd(_y0, _y1, _h00, _h01, _h10, _h11, &_x0, &_x1, 0.0f, 1.0f);
+
+  __attribute__((aligned(SRSLTE_SIMD_BIT_ALIGN))) cf_t x0[SRSLTE_SIMD_CF_SIZE];
+  __attribute__((aligned(SRSLTE_SIMD_BIT_ALIGN))) cf_t x1[SRSLTE_SIMD_CF_SIZE];
+
+  srslte_simd_cfi_store(x0, _x0);
+  srslte_simd_cfi_store(x1, _x1);
+
+  cf_error0 = x0[1] - x0_gold[1];
+  cf_error1 = x1[1] - x1_gold[1];
+  error += crealf(cf_error0) * crealf(cf_error0) + cimagf(cf_error0) * cimagf(cf_error0) +
+      crealf(cf_error1) * crealf(cf_error1) + cimagf(cf_error1) * cimagf(cf_error1);
+
+  return (error < 1e-3);
+}
+
+#endif /* SRSLTE_SIMD_CF_SIZE != 0 */
+
 bool test_vec_dot_prod_ccc(void) {
   __attribute__((aligned(256))) cf_t a[14];
   __attribute__((aligned(256))) cf_t b[14];
@@ -413,6 +505,10 @@ int main(int argc, char **argv) {
 #ifdef LV_HAVE_AVX
     RUN_TEST(test_zf_solver_avx);
 #endif /* LV_HAVE_AVX */
+
+#if SRSLTE_SIMD_CF_SIZE != 0
+    RUN_TEST(test_zf_solver_simd);
+#endif /* SRSLTE_SIMD_CF_SIZE != 0*/
   }
 
   if (mmse_solver) {
@@ -426,6 +522,10 @@ int main(int argc, char **argv) {
 #ifdef LV_HAVE_AVX
     RUN_TEST(test_mmse_solver_avx);
 #endif /* LV_HAVE_AVX */
+
+#if SRSLTE_SIMD_CF_SIZE != 0
+    RUN_TEST(test_mmse_solver_simd);
+#endif /* SRSLTE_SIMD_CF_SIZE != 0*/
   }
 
   RUN_TEST(test_vec_dot_prod_ccc);

lib/src/phy/utils/vector.c

@@ -104,6 +104,12 @@ void srslte_vec_lut_sss(const short *x, const unsigned short *lut, short *y, con
   srslte_vec_lut_sss_simd(x, lut, y, len);
 }
 
+void srslte_vec_lut_sis(const short *x, const unsigned int *lut, short *y, const uint32_t len) {
+  for (int i=0; i < len; i++) {
+    y[lut[i]] = x[i];
+  }
+}
+
 void *srslte_vec_malloc(uint32_t size) {
   void *ptr;
   if (posix_memalign(&ptr, SRSLTE_SIMD_BIT_ALIGN, size)) {
@@ -421,8 +427,8 @@ void srslte_vec_quant_sus(const int16_t *in, uint16_t *out, const float gain, co
   }
 }
 
-void srs_vec_cf_cpy(const cf_t *dst, cf_t *src, int len) {
+void srs_vec_cf_cpy(const cf_t *src, cf_t *dst, int len) {
-  srslte_vec_cp_simd(dst, src, len);
+  srslte_vec_cp_simd(src, dst, len);
 }
 
 void srslte_vec_interleave(const cf_t *x, const cf_t *y, cf_t *z, const int len) {

lib/src/radio/radio.cc

@@ -51,11 +51,13 @@ bool radio::init(char *args, char *devname, uint32_t nof_channels)
   // Suppress radio stdout
   srslte_rf_suppress_stdout(&rf_device);
 
+  continuous_tx = false;
   tx_adv_auto = true;
   // Set default preamble length each known device
   // We distinguish by device family, maybe we should calibrate per device
   if (strstr(srslte_rf_name(&rf_device), "uhd")) {
     burst_preamble_sec = uhd_default_burst_preamble_sec;
+    continuous_tx = true;
   } else if (strstr(srslte_rf_name(&rf_device), "bladerf")) {
     burst_preamble_sec = blade_default_burst_preamble_sec;
   } else {
@@ -89,6 +91,7 @@ void radio::reset()
   printf("Resetting Radio...\n");
   srslte_rf_stop_rx_stream(&rf_device);
   radio_is_streaming = false;
+  usleep(100000);
 }
 
 void radio::set_manual_calibration(rf_cal_t* calibration)
@@ -110,6 +113,14 @@ void radio::set_burst_preamble(double preamble_us)
   burst_preamble_sec = (double) preamble_us/1e6; 
 }
 
+void radio::set_continuous_tx(bool enable) {
+  continuous_tx = enable;
+}
+
+bool radio::is_continuous_tx() {
+  return continuous_tx;
+}
+
 void radio::set_tx_adv(int nsamples)
 {
   tx_adv_auto = false;
@@ -175,7 +186,7 @@ float radio::set_tx_power(float power)
 
 float radio::get_max_tx_power()
 {
-  return 10;
+  return 40;
 }
 
 float radio::get_rssi()
@@ -450,6 +461,10 @@ void radio::set_tx_srate(double srate)
   
   // Calculate TX advance in seconds from samples and sampling rate 
   tx_adv_sec = nsamples/cur_tx_srate;
+  if (tx_adv_sec<0) {
+    tx_adv_sec *= -1;
+    tx_adv_negative = true; 
+  }
 }
 
 void radio::register_error_handler(srslte_rf_error_handler_t h)

lib/src/upper/rlc_tm.cc

@@ -60,9 +60,10 @@ void rlc_tm::empty_queue()
   // Drop all messages in TX queue
   byte_buffer_t *buf;
   while(ul_queue.size() > 0) {
-    ul_queue.read(&buf);
+    if (ul_queue.try_read(&buf)) {
       pool->deallocate(buf);
     }
+  }
 }
 
 void rlc_tm::reset()
@@ -112,7 +113,7 @@ int rlc_tm::read_pdu(uint8_t *payload, uint32_t nof_bytes)
     return 0;
   }
   byte_buffer_t *buf;
-  ul_queue.read(&buf);
+  if (ul_queue.try_read(&buf)) {
     pdu_size = buf->N_bytes;
     memcpy(payload, buf->msg, buf->N_bytes);
     log->debug("%s Complete SDU scheduled for tx. Stack latency: %ld us\n",
@@ -120,6 +121,10 @@ int rlc_tm::read_pdu(uint8_t *payload, uint32_t nof_bytes)
     pool->deallocate(buf);
     log->info_hex(payload, pdu_size, "TX %s, %s PDU", rrc->get_rb_name(lcid).c_str(), rlc_mode_text[RLC_MODE_TM]);
     return pdu_size;
+  } else {
+    log->warning("Queue empty while trying to read\n");
+    return 0;
+  }
 }
 
 void rlc_tm::write_pdu(uint8_t *payload, uint32_t nof_bytes)

srsenb/hdr/mac/scheduler_metric.h

@@ -43,7 +43,7 @@ private:
   bool new_allocation(uint32_t nof_rbg, uint32_t* rbgmask); 
   void update_allocation(uint32_t new_mask); 
   bool allocation_is_valid(uint32_t mask);
-  
+  dl_harq_proc* apply_user_allocation(sched_ue *user);
 
   uint32_t get_required_rbg(sched_ue *user, uint32_t tti); 
   uint32_t count_rbg(uint32_t mask); 
@@ -51,7 +51,6 @@ private:
   
   bool used_rb[MAX_RBG]; 
 
-  uint32_t nof_users_with_data; 
 
   uint32_t current_tti;
   uint32_t total_rb;
@@ -72,8 +71,8 @@ private:
   
   bool new_allocation(uint32_t L, ul_harq_proc::ul_alloc_t *alloc);
   bool allocation_is_valid(ul_harq_proc::ul_alloc_t alloc); 
+  ul_harq_proc* apply_user_allocation(sched_ue *user);
 
-  uint32_t nof_users_with_data; 
 
   bool used_rb[MAX_PRB]; 
   uint32_t current_tti; 

srsenb/hdr/mac/scheduler_ue.h

@@ -40,7 +40,8 @@ class sched_ue {
 public: 
   
   // used by sched_metric
-  uint32_t ue_idx;
+  dl_harq_proc* dl_next_alloc;
+  ul_harq_proc* ul_next_alloc;
 
   bool has_pucch;
   

srsenb/hdr/mac/ue.h

@@ -95,7 +95,7 @@ public:
   
   bool     process_pdus(); 
   uint8_t *request_buffer(uint32_t tti, uint32_t len); 
-  void     process_pdu(uint8_t *pdu, uint32_t nof_bytes, uint32_t tstamp);
+  void     process_pdu(uint8_t *pdu, uint32_t nof_bytes, srslte::pdu_queue::channel_t channel, uint32_t tstamp);
   void     push_pdu(uint32_t tti, uint32_t len); 
   void     deallocate_pdu(uint32_t tti);
   

srsenb/hdr/upper/s1ap.h

@@ -32,7 +32,6 @@
 #include "srslte/common/buffer_pool.h"
 #include "srslte/common/log.h"
 #include "srslte/common/common.h"
-#include "srslte/common/msg_queue.h"
 #include "srslte/common/threads.h"
 #include "srslte/interfaces/enb_interfaces.h"
 #include "common_enb.h"

srsenb/src/mac/scheduler_metric.cc

@@ -78,7 +78,6 @@ uint32_t dl_metric_rr::get_required_rbg(sched_ue *user, uint32_t tti)
 
 void dl_metric_rr::new_tti(std::map<uint16_t,sched_ue> &ue_db, uint32_t start_rb, uint32_t nof_rb, uint32_t nof_ctrl_symbols_, uint32_t tti)
 {
-  
   total_rb = start_rb+nof_rb; 
   for (uint32_t i=0;i<total_rb;i++) {
     if (i<start_rb) {
@@ -92,13 +91,19 @@ void dl_metric_rr::new_tti(std::map<uint16_t,sched_ue> &ue_db, uint32_t start_rb
   current_tti = tti;
   nof_ctrl_symbols = nof_ctrl_symbols_;
 
-  nof_users_with_data = 0; 
+  if(ue_db.size()==0)
-  for(std::map<uint16_t, sched_ue>::iterator iter=ue_db.begin(); iter!=ue_db.end(); ++iter) {
+    return;
-    sched_ue *user      = (sched_ue*) &iter->second;
+
-    if (user->get_pending_dl_new_data(current_tti) || user->get_pending_dl_harq(current_tti)) {
+  // give priority in a time-domain RR basis
-      user->ue_idx = nof_users_with_data;
+  uint32_t priority_idx = current_tti % ue_db.size();
-      nof_users_with_data++; 
+  std::map<uint16_t, sched_ue>::iterator iter = ue_db.begin();
+  std::advance(iter,priority_idx);
+  for(uint32_t ue_count = 0 ; ue_count < ue_db.size() ; ++iter, ++ue_count) {
+    if(iter==ue_db.end()) {
+      iter = ue_db.begin(); // wrap around
     }
+    sched_ue *user = (sched_ue*) &iter->second;
+    user->dl_next_alloc = apply_user_allocation(user);
   }
 }
 
@@ -136,24 +141,10 @@ bool dl_metric_rr::allocation_is_valid(uint32_t mask)
   return (mask & used_rb_mask); 
 }
 
-dl_harq_proc* dl_metric_rr::get_user_allocation(sched_ue *user)
+dl_harq_proc* dl_metric_rr::apply_user_allocation(sched_ue *user) {
-{
   uint32_t pending_data = user->get_pending_dl_new_data(current_tti);
   dl_harq_proc *h = user->get_pending_dl_harq(current_tti);
 
-  // Time-domain RR scheduling
-#if ASYNC_DL_SCHED
-  if (pending_data || h) {
-#else
-  if (pending_data || (h && !h->is_empty())) {
-#endif
-    if (nof_users_with_data) {
-      if ((current_tti%nof_users_with_data) != user->ue_idx) {
-        return NULL; 
-      }    
-    }
-  }
-  
   // Schedule retx if we have space
 #if ASYNC_DL_SCHED
   if (h) {
@@ -166,6 +157,7 @@ dl_harq_proc* dl_metric_rr::get_user_allocation(sched_ue *user)
       update_allocation(retx_mask);
       return h;
     }
+
     // If not, try to find another mask in the current tti
     uint32_t nof_rbg = count_rbg(retx_mask);
     if (nof_rbg < available_rb) {
@@ -195,9 +187,15 @@ dl_harq_proc* dl_metric_rr::get_user_allocation(sched_ue *user)
       }
     }
   }
+
   return NULL;
 }
 
+dl_harq_proc* dl_metric_rr::get_user_allocation(sched_ue *user)
+{
+  return user->dl_next_alloc;
+}
+
 
 
 
@@ -219,15 +217,20 @@ void ul_metric_rr::new_tti(std::map<uint16_t,sched_ue> &ue_db, uint32_t nof_rb_,
   available_rb = nof_rb_; 
   bzero(used_rb, nof_rb*sizeof(bool));
   
-  nof_users_with_data = 0; 
+  if(ue_db.size()==0)
-  for(std::map<uint16_t, sched_ue>::iterator iter=ue_db.begin(); iter!=ue_db.end(); ++iter) {
+      return;
-    sched_ue *user      = (sched_ue*) &iter->second;
+
-    if (user->get_pending_ul_new_data(current_tti) || !user->get_ul_harq(current_tti)->is_empty(0)) {
+  // give priority in a time-domain RR basis
-      user->ue_idx    = nof_users_with_data;
+  uint32_t priority_idx = (current_tti+ue_db.size()/2) % ue_db.size(); // make DL and UL interleaved
-      nof_users_with_data++;
+  std::map<uint16_t, sched_ue>::iterator iter = ue_db.begin();
+  std::advance(iter,priority_idx);
+  for(uint32_t ue_count = 0 ; ue_count < ue_db.size() ; ++iter, ++ue_count) {
+    if(iter==ue_db.end()) {
+      iter = ue_db.begin(); // wrap around
     }
+    sched_ue *user = (sched_ue*) &iter->second;
+    user->ul_next_alloc = apply_user_allocation(user);
   }
-
 }
 
 bool ul_metric_rr::allocation_is_valid(ul_harq_proc::ul_alloc_t alloc)
@@ -288,24 +291,13 @@ void ul_metric_rr::update_allocation(ul_harq_proc::ul_alloc_t alloc)
   available_rb -= alloc.L; 
 }
 
-ul_harq_proc*  ul_metric_rr::get_user_allocation(sched_ue *user)
+ul_harq_proc* ul_metric_rr::apply_user_allocation(sched_ue *user) {
-{
   // Time-domain RR scheduling
   uint32_t pending_data = user->get_pending_ul_new_data(current_tti);
   ul_harq_proc *h = user->get_ul_harq(current_tti);
 
-  if (pending_data || !h->is_empty(0)) {
-    if (nof_users_with_data) {
-      if ((current_tti%nof_users_with_data) != user->ue_idx) {
-        return NULL; 
-      }    
-    }    
-  }
-
   // Schedule retx if we have space
-  
   if (!h->is_empty(0)) {
-    
     ul_harq_proc::ul_alloc_t alloc = h->get_alloc();
 
     // If can schedule the same mask, do it
@@ -321,6 +313,7 @@ ul_harq_proc*  ul_metric_rr::get_user_allocation(sched_ue *user)
       return h;
     }
   }
+
   // If could not schedule the reTx, or there wasn't any pending retx, find an empty PID
   if (h->is_empty(0)) {
     // Allocate resources based on pending data
@@ -338,6 +331,9 @@ ul_harq_proc*  ul_metric_rr::get_user_allocation(sched_ue *user)
   return NULL;
 }
 
-
+ul_harq_proc*  ul_metric_rr::get_user_allocation(sched_ue *user)
+{
+  return user->ul_next_alloc;
+}
 
 }

srsenb/src/mac/scheduler_ue.cc

@@ -49,7 +49,7 @@ namespace srsenb {
  * 
  *******************************************************/
 
-sched_ue::sched_ue() : ue_idx(0), has_pucch(false), power_headroom(0), rnti(0), max_mcs_dl(0), max_mcs_ul(0),
+sched_ue::sched_ue() : dl_next_alloc(NULL), ul_next_alloc(NULL), has_pucch(false), power_headroom(0), rnti(0), max_mcs_dl(0), max_mcs_ul(0),
                        fixed_mcs_ul(0), fixed_mcs_dl(0), phy_config_dedicated_enabled(false)
 {
   log_h = NULL;

srsenb/src/mac/ue.cc

@@ -142,7 +142,7 @@ void ue::set_tti(uint32_t tti) {
 
 #include <assert.h>
 
-void ue::process_pdu(uint8_t* pdu, uint32_t nof_bytes, uint32_t tstamp)
+void ue::process_pdu(uint8_t* pdu, uint32_t nof_bytes, srslte::pdu_queue::channel_t channel, uint32_t tstamp)
 {
   // Unpack ULSCH MAC PDU 
   mac_msg_ul.init_rx(nof_bytes, true);

srsenb/src/upper/rrc.cc

@@ -121,7 +121,7 @@ uint32_t rrc::generate_sibs()
   
   // msg is array of SI messages, each SI message msg[i] may contain multiple SIBs
   // all SIBs in a SI message msg[i] share the same periodicity
-  LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT *msg = (LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT*)calloc(nof_messages, sizeof(LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT));
+  LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT *msg = (LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT*)calloc(nof_messages+1, sizeof(LIBLTE_RRC_BCCH_DLSCH_MSG_STRUCT));
 
   // Copy SIB1 to first SI message
   msg[0].N_sibs = 1;
@@ -1090,9 +1090,13 @@ void rrc::ue::notify_s1ap_ue_ctxt_setup_complete()
 void rrc::ue::notify_s1ap_ue_erab_setup_response(LIBLTE_S1AP_E_RABTOBESETUPLISTBEARERSUREQ_STRUCT *e)
 {
   LIBLTE_S1AP_MESSAGE_E_RABSETUPRESPONSE_STRUCT res;
+  res.ext=false;
   res.E_RABSetupListBearerSURes.len = 0;
   res.E_RABFailedToSetupListBearerSURes.len = 0;
 
+  res.CriticalityDiagnostics_present = false;
+  res.E_RABFailedToSetupListBearerSURes_present = false;
+
   for(uint32_t i=0; i<e->len; i++) {
     res.E_RABSetupListBearerSURes_present = true;
     LIBLTE_S1AP_E_RABTOBESETUPITEMBEARERSUREQ_STRUCT *erab = &e->buffer[i];
@@ -1447,6 +1451,8 @@ void rrc::ue::send_connection_reconf(srslte::byte_buffer_t *pdu)
   // Get DRB1 configuration 
   if (get_drbid_config(&conn_reconf->rr_cnfg_ded.drb_to_add_mod_list[0], 1)) {
     parent->rrc_log->error("Getting DRB1 configuration\n");
+    printf("The QCI %d for DRB1 is invalid or not configured.\n", erabs[5].qos_params.qCI.QCI);
+    return;
   } else {
     conn_reconf->rr_cnfg_ded.drb_to_add_mod_list_size = 1; 
   }
@@ -1524,8 +1530,10 @@ void rrc::ue::send_connection_reconf_new_bearer(LIBLTE_S1AP_E_RABTOBESETUPLISTBE
     uint8_t lcid  = id - 2; // Map e.g. E-RAB 5 to LCID 3 (==DRB1)
 
     // Get DRB configuration
-    if (get_drbid_config(&conn_reconf->rr_cnfg_ded.drb_to_add_mod_list[i], lcid)) {
+    if (get_drbid_config(&conn_reconf->rr_cnfg_ded.drb_to_add_mod_list[i], lcid-2)) {
       parent->rrc_log->error("Getting DRB configuration\n");    
+      printf("ERROR: The QCI %d is invalid or not configured.\n", erabs[lcid+4].qos_params.qCI.QCI);
+      return;
     } else {
       conn_reconf->rr_cnfg_ded.drb_to_add_mod_list_size++;
     }

srsepc/src/mme/s1ap_nas_transport.cc

@@ -1806,7 +1806,7 @@ s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *u
   act_def_eps_bearer_context_req.eps_qos.mbr_dl_ext = 250; //FIXME check
 
   //set apn
-  act_def_eps_bearer_context_req.apn.apn = m_s1ap->m_s1ap_args.mme_apn;
+  strncpy(act_def_eps_bearer_context_req.apn.apn, m_s1ap->m_s1ap_args.mme_apn.c_str(), LIBLTE_STRING_LEN);
   act_def_eps_bearer_context_req.proc_transaction_id = ue_emm_ctx->procedure_transaction_id; //FIXME
 
   //Set DNS server
@@ -1933,10 +1933,10 @@ s1ap_nas_transport::pack_emm_information( ue_ctx_t *ue_ctx, srslte::byte_buffer_
 
   LIBLTE_MME_EMM_INFORMATION_MSG_STRUCT emm_info;
   emm_info.full_net_name_present = true;
-  emm_info.full_net_name.name = std::string("Software Radio Systems LTE");
+  strncpy(emm_info.full_net_name.name, "Software Radio Systems LTE", LIBLTE_STRING_LEN);
   emm_info.full_net_name.add_ci = LIBLTE_MME_ADD_CI_DONT_ADD;
   emm_info.short_net_name_present = true;
-  emm_info.short_net_name.name = std::string("srsLTE");
+  strncpy(emm_info.short_net_name.name, "srsLTE", LIBLTE_STRING_LEN);
   emm_info.short_net_name.add_ci = LIBLTE_MME_ADD_CI_DONT_ADD;
 
   emm_info.local_time_zone_present = false;

srsue/hdr/mac/demux.h

@@ -51,12 +51,13 @@ public:
   
   void     push_pdu(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp);
   void     push_pdu_bcch(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp);
+  void     push_pdu_mch(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp);
   void     push_pdu_temp_crnti(uint8_t *buff, uint32_t nof_bytes);
 
   void     set_uecrid_callback(bool (*callback)(void*, uint64_t), void *arg);
   bool     get_uecrid_successful();
 
-  void     process_pdu(uint8_t *pdu, uint32_t nof_bytes, uint32_t tstamp);
+  void     process_pdu(uint8_t *pdu, uint32_t nof_bytes, srslte::pdu_queue::channel_t channel, uint32_t tstamp);
   
 private:
   const static int MAX_PDU_LEN     = 150*1024/8; // ~ 150 Mbps  

srsue/hdr/mac/mac.h

@@ -50,7 +50,7 @@ class mac
     ,public mac_interface_rrc
     ,public srslte::timer_callback
     ,public srslte::mac_interface_timers
-    ,public thread
+    ,public periodic_thread
 {
 public:
   mac();
@@ -68,15 +68,13 @@ public:
   void tb_decoded(bool ack, uint32_t tb_idx, srslte_rnti_type_t rnti_type, uint32_t harq_pid);
   void bch_decoded_ok(uint8_t *payload, uint32_t len);
   void pch_decoded_ok(uint32_t len);    
-  void tti_clock(uint32_t tti);
 
   
   /******** Interface from RLC (RLC -> MAC) ****************/ 
   void bcch_start_rx(); 
-  void bcch_stop_rx(); 
   void bcch_start_rx(int si_window_start, int si_window_length);
   void pcch_start_rx(); 
-  void pcch_stop_rx(); 
+  void clear_rntis();
   void setup_lcid(uint32_t lcid, uint32_t lcg, uint32_t priority, int PBR_x_tti, uint32_t BSD);
   void reconfiguration(); 
   void reset();
@@ -110,14 +108,13 @@ public:
 
 
 private:  
-  void run_thread(); 
+  void run_period();
   
   static const int MAC_MAIN_THREAD_PRIO = -1; // Use default high-priority below UHD
   static const int MAC_PDU_THREAD_PRIO  = DEFAULT_PRIORITY-5;
   static const int MAC_NOF_HARQ_PROC    = 2*HARQ_DELAY_MS;
 
   // Interaction with PHY 
-  srslte::tti_sync_cv   ttisync; 
   phy_interface_mac    *phy_h;
   rlc_interface_mac    *rlc_h; 
   rrc_interface_mac    *rrc_h; 
@@ -130,10 +127,6 @@ private:
   ue_rnti_t     uernti; 
   
   uint32_t      tti; 
-  bool          started; 
-  bool          is_synchronized; 
-  uint16_t      last_temporal_crnti;
-  uint16_t      phy_rnti;
 
   /* Multiplexing/Demultiplexing Units */
   mux           mux_unit; 
@@ -168,19 +161,6 @@ private:
 
   mac_metrics_t metrics;
 
-  /* Class to run Timers in a dedicated thread */
-  class mac_timers : public periodic_thread {
-   public:
-    void init(srslte::timers *timers, srslte::log *log_h);
-   private:
-    void run_period();
-    srslte::timers *timers;
-    bool running;
-    srslte::log *log_h;
-  };
-
-  mac_timers mactimers;
-
   /* Class to process MAC PDUs from DEMUX unit */
   class pdu_process : public thread {
   public: 

srsue/hdr/phy/phch_common.h

@@ -27,9 +27,6 @@
 #ifndef SRSUE_PHCH_COMMON_H
 #define SRSUE_PHCH_COMMON_H
 
-#define TX_MODE_CONTINUOUS 1
-
-
 #include <pthread.h>
 #include <string.h>
 #include <vector>
@@ -68,15 +65,17 @@ public:
   float cur_radio_power;
   float cur_pusch_power;
   float avg_rsrp;
+  float avg_rsrp_cqi;
   float avg_rsrp_dbm;
+  float avg_rsrp_sync_dbm;
   float avg_rsrq_db;
   float avg_rssi_dbm;
   float last_radio_rssi;
   float rx_gain_offset;
-  float avg_snr_db;
+  float avg_snr_db_cqi;
+  float avg_snr_db_sync;
   float avg_noise;
 
-  bool     pcell_meas_enabled;
   uint32_t pcell_report_period;
 
   // Save last TBS for mcs>28 cases

srsue/hdr/phy/phch_recv.h

@@ -28,6 +28,7 @@
 #define SRSUE_PHCH_RECV_H
 
 #include <map>
+#include <pthread.h>
 
 #include "srslte/srslte.h"
 #include "srslte/common/log.h"
@@ -50,29 +51,23 @@ class phch_recv : public thread, public chest_feedback_itf
 public:
   phch_recv();
   ~phch_recv();
+
   void init(srslte::radio_multi* radio_handler, mac_interface_phy *mac,rrc_interface_phy *rrc,
             prach *prach_buffer, srslte::thread_pool *_workers_pool,
             phch_common *_worker_com, srslte::log* _log_h, srslte::log *_log_phy_lib_h, uint32_t nof_rx_antennas, uint32_t prio, int sync_cpu_affinity = -1);
   void stop();
-  void set_agc_enable(bool enable);
+  void radio_overflow();
-
-  void    set_earfcn(std::vector<uint32_t> earfcn);
-  void    force_freq(float dl_freq, float ul_freq);
 
-  void    reset_sync();
+  // RRC interface for controling the SYNC state
-  void    cell_search_start();
+  phy_interface_rrc::cell_search_ret_t cell_search(phy_interface_rrc::phy_cell_t *cell);
-  void    cell_search_next(bool reset = false);
+  bool    cell_select(phy_interface_rrc::phy_cell_t *cell);
-  void    cell_select(uint32_t earfcn, srslte_cell_t cell);
+  bool    cell_is_camping();
-  bool    cell_handover(srslte_cell_t cell);
 
+  // RRC interface for controlling the neighbour cell measurement
   void    meas_reset();
   int     meas_start(uint32_t earfcn, int pci);
   int     meas_stop(uint32_t earfcn, int pci);
 
-  uint32_t get_current_tti();
-  
-  bool    status_is_sync();
-
   // from chest_feedback_itf
   void    in_sync();
   void    out_of_sync();
@@ -80,37 +75,21 @@ public:
 
   void    set_time_adv_sec(float time_adv_sec);
   void    get_current_cell(srslte_cell_t *cell, uint32_t *earfcn = NULL);
+  uint32_t get_current_tti();
 
+  // From UE configuration
+  void    set_agc_enable(bool enable);
+  void    set_earfcn(std::vector<uint32_t> earfcn);
+  void    force_freq(float dl_freq, float ul_freq);
 
+  // Other functions
   const static int MUTEX_X_WORKER = 4;
-
   double set_rx_gain(double gain);
   int radio_recv_fnc(cf_t *data[SRSLTE_MAX_PORTS], uint32_t nsamples, srslte_timestamp_t *rx_time);
   int scell_recv_fnc(cf_t *data[SRSLTE_MAX_PORTS], uint32_t nsamples, srslte_timestamp_t *rx_time);
 
 private:
 
-  std::vector<uint32_t> earfcn;
-
-  void   reset();
-  void   radio_error();
-  void   set_ue_sync_opts(srslte_ue_sync_t *q, float cfo);
-  void   run_thread();
-
-  void   set_sampling_rate();
-  bool   set_frequency();
-  bool   set_cell();
-
-  void   cell_search_inc();
-  void   cell_reselect();
-
-  float  get_cfo();
-
-  uint32_t new_earfcn;
-  srslte_cell_t new_cell;
-
-  bool   running;
-
   // Class to run cell search
   class search {
   public:
@@ -119,9 +98,7 @@ private:
     ~search();
     void     init(cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t nof_rx_antennas, phch_recv *parent);
     void     reset();
-    float    get_last_gain();
     float    get_last_cfo();
-    void     set_N_id_2(int N_id_2);
     void     set_agc_enable(bool enable);
     ret_code run(srslte_cell_t *cell);
 
@@ -137,22 +114,23 @@ private:
   // Class to synchronize system frame number
   class sfn_sync {
   public:
-    typedef enum {IDLE, SFN_FOUND, SFX0_FOUND, ERROR, TIMEOUT} ret_code;
+    typedef enum {IDLE, SFN_FOUND, SFX0_FOUND, SFN_NOFOUND, ERROR} ret_code;
 
     ~sfn_sync();
-    void     init(srslte_ue_sync_t *ue_sync, cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t timeout = SYNC_SFN_TIMEOUT);
+    void     init(srslte_ue_sync_t *ue_sync, cf_t *buffer[SRSLTE_MAX_PORTS], srslte::log *log_h, uint32_t nof_subframes = SFN_SYNC_NOF_SUBFRAMES);
     void     reset();
     bool     set_cell(srslte_cell_t cell);
     ret_code run_subframe(srslte_cell_t *cell, uint32_t *tti_cnt, bool sfidx_only = false);
 
   private:
+    const static int SFN_SYNC_NOF_SUBFRAMES = 100;
+
+    uint32_t          cnt;
+    uint32_t          timeout;
     srslte::log      *log_h;
     srslte_ue_sync_t *ue_sync;
     cf_t             *buffer[SRSLTE_MAX_PORTS];
     srslte_ue_mib_t   ue_mib;
-    uint32_t          cnt;
-    uint32_t          timeout;
-    const static uint32_t SYNC_SFN_TIMEOUT = 80;
   };
 
   // Class to perform cell measurements
@@ -170,7 +148,7 @@ private:
     void      set_cell(srslte_cell_t cell);
     ret_code  run_subframe(uint32_t sf_idx);
     ret_code  run_subframe_sync(srslte_ue_sync_t *ue_sync, uint32_t sf_idx);
-    ret_code  run_multiple_subframes(cf_t *buffer, int offset, uint32_t sf_idx, uint32_t nof_sf);
+    ret_code  run_multiple_subframes(cf_t *buffer, uint32_t offset, uint32_t sf_idx, uint32_t nof_sf);
     float     rssi();
     float     rsrp();
     float     rsrq();
@@ -261,9 +239,26 @@ private:
   // 36.133 9.1.2.1 for band 7
   const static float ABSOLUTE_RSRP_THRESHOLD_DBM = -125;
 
+  std::vector<uint32_t> earfcn;
+
+  void   reset();
+  void   radio_error();
+  void   set_ue_sync_opts(srslte_ue_sync_t *q, float cfo);
+  void   run_thread();
+  float  get_tx_cfo();
+
+  void   set_sampling_rate();
+  bool   set_frequency();
+  bool   set_cell();
+
+  uint32_t new_earfcn;
+  srslte_cell_t new_cell;
+
+  bool   radio_is_overflow;
+  bool   radio_overflow_return;
+  bool   running;
 
   // Objects for internal use
-  measure               measure_p;
   search                search_p;
   sfn_sync              sfn_p;
   intra_measure         intra_freq_meas;
@@ -298,19 +293,128 @@ private:
   const static uint32_t NOF_OUT_OF_SYNC_SF = 200;
   const static uint32_t NOF_IN_SYNC_SF     = 100;
 
-  // State for primary cell
+  // State machine for SYNC thread
+  class sync_state {
+   public:
     typedef enum {
       IDLE = 0,
       CELL_SEARCH,
-    CELL_SELECT,
+      SFN_SYNC,
-    CELL_RESELECT,
+      CAMPING,
-    CELL_MEASURE,
+    } state_t;
-    CELL_CAMP,
-  } phy_state_t;
 
-  phy_state_t phy_state, prev_state;
+    /* Run_state is called by the main thread at the start of each loop. It updates the state
+     * and returns the current state
+     */
+    state_t run_state() {
+      pthread_mutex_lock(&inside);
+      cur_state = next_state;
+      pthread_cond_broadcast(&cvar);
+      pthread_mutex_unlock(&inside);
+      return cur_state;
+    }
+
+    // Called by the main thread at the end of each state to indicate it has finished.
+    void state_exit(bool exit_ok = true) {
+      pthread_mutex_lock(&inside);
+      if (cur_state == SFN_SYNC && exit_ok == true) {
+        next_state = CAMPING;
+      } else {
+        next_state = IDLE;
+      }
+      pthread_mutex_unlock(&inside);
+    }
+    void force_sfn_sync() {
+      pthread_mutex_lock(&inside);
+      next_state = SFN_SYNC;
+      pthread_mutex_unlock(&inside);
+    }
+
+    /* Functions to be called from outside the STM thread to instruct the STM to switch state.
+     * The functions change the state and wait until it has changed it.
+     *
+     * These functions are mutexed and only 1 can be called at a time
+     */
+    void go_idle() {
+      pthread_mutex_lock(&outside);
+      go_state(IDLE);
+      pthread_mutex_unlock(&outside);
+    }
+    void run_cell_search() {
+      pthread_mutex_lock(&outside);
+      go_state(CELL_SEARCH);
+      wait_state_change(CELL_SEARCH);
+      pthread_mutex_unlock(&outside);
+    }
+    void run_sfn_sync() {
+      pthread_mutex_lock(&outside);
+      go_state(SFN_SYNC);
+      wait_state_change(SFN_SYNC);
+      pthread_mutex_unlock(&outside);
+    }
+
+
+    /* Helpers below this */
+    bool is_idle() {
+      return cur_state == IDLE;
+    }
+    bool is_camping() {
+      return cur_state == CAMPING;
+    }
+
+    const char *to_string() {
+      switch(cur_state) {
+        case IDLE:
+          return "IDLE";
+        case CELL_SEARCH:
+          return "SEARCH";
+        case SFN_SYNC:
+          return "SYNC";
+        case CAMPING:
+          return "CAMPING";
+        default:
+          return "UNKNOWN";
+      }
+    }
+
+    sync_state() {
+      pthread_mutex_init(&inside, NULL);
+      pthread_mutex_init(&outside, NULL);
+      pthread_cond_init(&cvar, NULL);
+      cur_state = IDLE;
+      next_state = IDLE;
+    }
+   private:
+
+    void go_state(state_t s) {
+      pthread_mutex_lock(&inside);
+      next_state = s;
+      while(cur_state != s) {
+        pthread_cond_wait(&cvar, &inside);
+      }
+      pthread_mutex_unlock(&inside);
+    }
+
+    /* Waits until there is a call to set_state() and then run_state(). Returns when run_state() returns */
+    void wait_state_change(state_t prev_state) {
+      pthread_mutex_lock(&inside);
+      while(cur_state == prev_state) {
+        pthread_cond_wait(&cvar, &inside);
+      }
+      pthread_mutex_unlock(&inside);
+    }
+
+    state_t cur_state, next_state;
+    pthread_mutex_t inside, outside;
+    pthread_cond_t  cvar;
+
+  };
 
-  bool is_in_idle;
+  pthread_mutex_t rrc_mutex;
+
+  sync_state phy_state;
+
+  search::ret_code   cell_search_ret;
 
   // Sampling rate mode (find is 1.96 MHz, camp is the full cell BW)
   enum {
@@ -320,9 +424,8 @@ private:
 
   // This is the primary cell
   srslte_cell_t cell;
-  bool          cell_is_set;
   bool          started;
-  float         time_adv_sec;
+  float         time_adv_sec, next_time_adv_sec;
   uint32_t      tti;
   bool          do_agc;
   
@@ -330,8 +433,8 @@ private:
   uint32_t      tx_mutex_cnt;
 
   float         ul_dl_factor;
-  uint32_t      current_earfcn;
+  int           current_earfcn;
-  int           cur_earfcn_index;
+  uint32_t      cellsearch_earfcn_index;
 
   float         dl_freq;
   float         ul_freq;

srsue/hdr/phy/phch_worker.h

@@ -53,6 +53,7 @@ public:
   cf_t* get_buffer(uint32_t antenna_idx);
   void  set_tti(uint32_t tti, uint32_t tx_tti); 
   void  set_tx_time(srslte_timestamp_t tx_time, uint32_t next_offset);
+  void  set_prach(cf_t *prach_ptr, float prach_power);
   void  set_cfo(float cfo);
 
   void  set_ul_params(bool pregen_disabled = false);
@@ -169,6 +170,8 @@ private:
   bool                              sr_configured;
   float                             cfo;
   bool                              rar_cqi_request;
+  cf_t                             *prach_ptr;
+  float                             prach_power;
 
   uint32_t rssi_read_cnt;
 

srsue/hdr/phy/phy.h

@@ -82,21 +82,18 @@ public:
 
   /********** RRC INTERFACE ********************/
   void    reset();
-  void    sync_reset();
   void    configure_ul_params(bool pregen_disabled = false);
-  void    cell_search_start();
+  cell_search_ret_t cell_search(phy_cell_t *cell);
-  void    cell_search_next();
+  bool    cell_select(phy_cell_t *cell);
-  void    cell_select(uint32_t earfcn, srslte_cell_t phy_cell);
-  bool    cell_handover(srslte_cell_t cell);
 
   void    meas_reset();
   int     meas_start(uint32_t earfcn, int pci);
   int     meas_stop(uint32_t earfcn, int pci);
 
-  /********** MAC INTERFACE ********************/
+  // also MAC interface
-  /* Functions to synchronize with a cell */
+  bool    cell_is_camping();
-  bool    sync_status(); // this is also RRC interface
 
+  /********** MAC INTERFACE ********************/
   /* Sets a C-RNTI allowing the PHY to pregenerate signals if necessary */
   void    set_crnti(uint16_t rnti);
   

srsue/hdr/phy/prach.h

@@ -58,14 +58,12 @@ namespace srsue {
     bool           is_ready_to_send(uint32_t current_tti);
     bool           is_pending();
     int            tx_tti();
-    
+    cf_t*          generate(float cfo, uint32_t *nof_sf, float *target_power = NULL);
-    void           send(srslte::radio* radio_handler, float cfo, float pathloss, srslte_timestamp_t rx_time);
-    float          get_p0_preamble();
-    
-    static const uint32_t tx_advance_sf = 4; // Number of subframes to advance transmission
 
   private:
 
+    const static int MAX_LEN_SF = 3;
+    
     LIBLTE_RRC_PRACH_CONFIG_SIB_STRUCT *config;
     phy_args_t                         *args; 
     

srsue/hdr/ue.h

@@ -69,6 +69,8 @@ public:
 
   bool init(all_args_t *args_);
   void stop();
+  bool attach();
+  bool deattach();
   bool is_attached();
   void start_plot();
 

srsue/hdr/ue_base.h

@@ -64,6 +64,7 @@ typedef struct {
   std::string   device_args;
   std::string   time_adv_nsamples;
   std::string   burst_preamble;
+  std::string   continuous_tx;
 }rf_args_t;
 
 typedef struct {
@@ -112,6 +113,7 @@ typedef struct {
   phy_args_t    phy;
   float         metrics_period_secs;
   bool          pregenerate_signals;
+  bool          print_buffer_state;
   bool          metrics_csv_enable;
   std::string   metrics_csv_filename;
 }expert_args_t;
@@ -155,6 +157,8 @@ public:
 
   virtual bool init(all_args_t *args_) = 0;
   virtual void stop() = 0;
+  virtual bool attach() = 0;
+  virtual bool deattach() = 0;
   virtual bool is_attached() = 0;
   virtual void start_plot() = 0;
 

srsue/hdr/upper/gw.h

@@ -30,7 +30,6 @@
 #include "srslte/common/buffer_pool.h"
 #include "srslte/common/log.h"
 #include "srslte/common/common.h"
-#include "srslte/common/msg_queue.h"
 #include "srslte/common/interfaces_common.h"
 #include "srslte/interfaces/ue_interfaces.h"
 #include "srslte/common/threads.h"

srsue/hdr/upper/nas.h

@@ -43,29 +43,20 @@ namespace srsue {
 typedef enum {
   EMM_STATE_NULL = 0,
   EMM_STATE_DEREGISTERED,
-  EMM_STATE_REGISTERED_INITIATED,
   EMM_STATE_REGISTERED,
-  EMM_STATE_SERVICE_REQUEST_INITIATED,
   EMM_STATE_DEREGISTERED_INITIATED,
   EMM_STATE_TAU_INITIATED,
   EMM_STATE_N_ITEMS,
 } emm_state_t;
 static const char emm_state_text[EMM_STATE_N_ITEMS][100] = {"NULL",
                                                             "DEREGISTERED",
-                                                            "REGISTERED INITIATED",
                                                             "REGISTERED",
-                                                            "SERVICE REQUEST INITIATED",
                                                             "DEREGISTERED INITIATED",
                                                             "TRACKING AREA UPDATE INITIATED"};
 
 static const bool eia_caps[8] = {false, true, true, false, false, false, false, false};
 static const bool eea_caps[8] = {true,  true, true, false, false, false, false, false};
 
-typedef enum {
-  PLMN_NOT_SELECTED = 0,
-  PLMN_SELECTED
-} plmn_selection_state_t;
-
 class nas
   : public nas_interface_rrc,
     public nas_interface_ue,
@@ -83,20 +74,16 @@ public:
   emm_state_t get_state();
 
   // RRC interface
-  void notify_connection_setup();
+  void paging(LIBLTE_RRC_S_TMSI_STRUCT *ue_identiy);
+  void set_barring(barring_t barring);
   void write_pdu(uint32_t lcid, byte_buffer_t *pdu);
   uint32_t get_ul_count();
   bool is_attached();
-  bool is_attaching();
-  bool is_data_requested();
-  bool get_s_tmsi(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi);
   bool get_k_asme(uint8_t *k_asme_, uint32_t n);
-  bool plmn_found(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, uint16_t tracking_area_code);
-  void plmn_search_end();
 
   // UE interface
-  void attach_request();
+  bool attach_request();
-  void deattach_request();
+  bool deattach_request();
 
   // PCAP
   void start_pcap(srslte::nas_pcap *pcap_);
@@ -112,9 +99,10 @@ private:
 
   emm_state_t state;
 
-  plmn_selection_state_t plmn_selection;
+  nas_interface_rrc::barring_t current_barring;
+
+  bool plmn_is_selected;
   LIBLTE_RRC_PLMN_IDENTITY_STRUCT current_plmn;
-  LIBLTE_RRC_PLMN_IDENTITY_STRUCT selecting_plmn;
   LIBLTE_RRC_PLMN_IDENTITY_STRUCT home_plmn;
 
   std::vector<LIBLTE_RRC_PLMN_IDENTITY_STRUCT > known_plmns;
@@ -148,6 +136,10 @@ private:
   // PCAP
   srslte::nas_pcap *pcap = NULL;
 
+  bool running;
+
+  bool rrc_connect();
+
   void integrity_generate(uint8_t *key_128,
                           uint32_t count,
                           uint8_t direction,
@@ -160,6 +152,8 @@ private:
 
   bool check_cap_replay(LIBLTE_MME_UE_SECURITY_CAPABILITIES_STRUCT *caps);
 
+  void select_plmn();
+
   // Parsers
   void parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu);
   void parse_attach_reject(uint32_t lcid, byte_buffer_t *pdu);
@@ -171,10 +165,12 @@ private:
   void parse_esm_information_request(uint32_t lcid, byte_buffer_t *pdu);
   void parse_emm_information(uint32_t lcid, byte_buffer_t *pdu);
 
+  // Packet generators
+  void gen_attach_request(byte_buffer_t *msg);
+  void gen_service_request(byte_buffer_t *msg);
+
   // Senders
-  void send_attach_request();
   void send_identity_response();
-  void send_service_request();
   void send_esm_information_response();
   void gen_pdn_connectivity_request(LIBLTE_BYTE_MSG_STRUCT *msg);
   void send_security_mode_reject(uint8_t cause);

srsue/hdr/upper/rrc.h

@@ -36,6 +36,7 @@
 #include "srslte/interfaces/ue_interfaces.h"
 #include "srslte/common/security.h"
 #include "srslte/common/threads.h"
+#include "srslte/common/block_queue.h"
 
 #include <math.h>
 #include <map>
@@ -52,21 +53,21 @@ using srslte::byte_buffer_t;
 
 namespace srsue {
 
-
 class cell_t
 {
  public:
   bool is_valid() {
-    return earfcn != 0 && srslte_cell_isvalid(&phy_cell);
+    return phy_cell.earfcn != 0 && srslte_cell_isvalid(&phy_cell.cell);
   }
   bool equals(cell_t *x) {
-    return equals(x->earfcn, x->phy_cell.id);
+    return equals(x->phy_cell.earfcn, x->phy_cell.cell.id);
   }
   bool equals(uint32_t earfcn, uint32_t pci) {
-    return earfcn == this->earfcn && pci == phy_cell.id;
+    return earfcn == this->phy_cell.earfcn && pci == phy_cell.cell.id;
   }
+  // NaN means an RSRP value has not yet been obtained. Keep then in the list and clean them if never updated
   bool greater(cell_t *x) {
-    return rsrp > x->rsrp;
+    return rsrp > x->rsrp || isnan(rsrp);
   }
   bool plmn_equals(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id) {
     if (has_valid_sib1) {
@@ -78,11 +79,39 @@ class cell_t
     }
     return false;
   }
+
+  uint32_t nof_plmns() {
+    if (has_valid_sib1) {
+      return sib1.N_plmn_ids;
+    } else {
+      return 0;
+    }
+  }
+
+  LIBLTE_RRC_PLMN_IDENTITY_STRUCT get_plmn(uint32_t idx) {
+    if (idx < sib1.N_plmn_ids && has_valid_sib1) {
+      return sib1.plmn_id[idx].id;
+    } else {
+      LIBLTE_RRC_PLMN_IDENTITY_STRUCT null;
+      null.mnc = 0;
+      null.mcc = 0;
+      return null;
+    }
+  }
+
+  uint16_t get_tac() {
+    if (has_valid_sib1) {
+      return sib1.tracking_area_code;
+    } else {
+      return 0;
+    }
+  }
+
   cell_t() {
-    srslte_cell_t tmp = {};
+    phy_interface_rrc::phy_cell_t tmp = {};
-    cell_t(tmp, 0, 0);
+    cell_t(tmp, 0);
   }
-  cell_t(srslte_cell_t phy_cell, uint32_t earfcn, float rsrp) {
+  cell_t(phy_interface_rrc::phy_cell_t phy_cell, float rsrp) {
     gettimeofday(&last_update, NULL);
     this->has_valid_sib1 = false;
     this->has_valid_sib2 = false;
@@ -90,7 +119,6 @@ class cell_t
     this->has_valid_sib13 = false;
     this->phy_cell = phy_cell;
     this->rsrp = rsrp;
-    this->earfcn = earfcn;
     in_sync = true;
     bzero(&sib1, sizeof(sib1));
     bzero(&sib2, sizeof(sib2));
@@ -99,15 +127,15 @@ class cell_t
   }
 
   uint32_t get_earfcn() {
-    return earfcn;
+    return phy_cell.earfcn;
   }
 
   uint32_t get_pci() {
-    return phy_cell.id;
+    return phy_cell.cell.id;
   }
 
   void set_rsrp(float rsrp) {
-    if (~isnan(rsrp)) {
+    if (!isnan(rsrp)) {
       this->rsrp = rsrp;
     }
     in_sync = true;
@@ -170,6 +198,20 @@ class cell_t
     return has_valid_sib13;
   }
 
+  bool has_sib(uint32_t index) {
+    switch(index) {
+      case 0:
+        return has_sib1();
+      case 1:
+        return has_sib2();
+      case 2:
+        return has_sib3();
+      case 12:
+        return has_sib13();
+    }
+    return false;
+  }
+
   uint16_t get_mcc() {
     if (has_valid_sib1) {
       if (sib1.N_plmn_ids > 0) {
@@ -188,12 +230,11 @@ class cell_t
     return 0;
   }
 
-  srslte_cell_t phy_cell;
+  phy_interface_rrc::phy_cell_t phy_cell;
   bool     in_sync;
 
  private:
   float    rsrp;
-  uint32_t earfcn;
   struct timeval last_update;
 
   bool     has_valid_sib1;
@@ -231,56 +272,61 @@ public:
   void stop();
 
   rrc_state_t get_state();
-
   void set_args(rrc_args_t *args);
 
   // Timeout callback interface
   void timer_expired(uint32_t timeout_id);
-
   void liblte_rrc_log(char *str);
 
-
   // NAS interface
   void write_sdu(uint32_t lcid, byte_buffer_t *sdu);
-
+  void enable_capabilities();
   uint16_t get_mcc();
-
   uint16_t get_mnc();
-
+  int plmn_search(found_plmn_t found_plmns[MAX_FOUND_PLMNS]);
-  void enable_capabilities();
+  void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id);
-  void plmn_search();
+  bool connection_request(LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM cause,
-  void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, bool connect_request);
+                          srslte::byte_buffer_t *dedicatedInfoNAS);
+  void set_ue_idenity(LIBLTE_RRC_S_TMSI_STRUCT s_tmsi);
 
   // PHY interface
   void in_sync();
   void out_of_sync();
-  void earfcn_end();
-  void cell_camping(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp);
   void new_phy_meas(float rsrp, float rsrq, uint32_t tti, int earfcn, int pci);
 
   // MAC interface
   void ho_ra_completed(bool ra_successful);
   void release_pucch_srs();
   void run_tti(uint32_t tti);
-
   void ra_problem();
 
   // GW interface
-  bool is_connected();
+  bool is_connected(); // this is also NAS interface
-
   bool have_drb();
 
   // PDCP interface
   void write_pdu(uint32_t lcid, byte_buffer_t *pdu);
-
   void write_pdu_bcch_bch(byte_buffer_t *pdu);
-
   void write_pdu_bcch_dlsch(byte_buffer_t *pdu);
-
   void write_pdu_pcch(byte_buffer_t *pdu);
 
 
 private:
+
+  typedef struct {
+    enum {
+      PCCH,
+      STOP
+    } command;
+    byte_buffer_t *pdu;
+  } cmd_msg_t;
+
+  bool running;
+  srslte::block_queue<cmd_msg_t> cmd_q;
+  void run_thread();
+
+  void process_pcch(byte_buffer_t *pdu);
+
   srslte::byte_buffer_pool *pool;
   srslte::log *rrc_log;
   phy_interface_rrc *phy;
@@ -295,6 +341,8 @@ private:
   LIBLTE_RRC_DL_CCCH_MSG_STRUCT dl_ccch_msg;
   LIBLTE_RRC_DL_DCCH_MSG_STRUCT dl_dcch_msg;
 
+  byte_buffer_t *dedicatedInfoNAS;
+
   byte_buffer_t* byte_align_and_pack();
   void send_ul_ccch_msg();
   void send_ul_dcch_msg();
@@ -304,28 +352,22 @@ private:
 
   rrc_state_t state;
   uint8_t transaction_id;
+  LIBLTE_RRC_S_TMSI_STRUCT ueIdentity;
+  bool ueIdentity_configured;
+
   bool drb_up;
 
   rrc_args_t args;
-  bool first_stimsi_attempt;
+
+  uint32_t cell_clean_cnt;
 
   uint16_t ho_src_rnti;
   cell_t   ho_src_cell;
-  uint32_t ho_target_pci;
+  phy_interface_rrc::phy_cfg_t previous_phy_cfg;
-  bool     ho_syncing;
+  mac_interface_rrc::mac_cfg_t previous_mac_cfg;
-  phy_interface_rrc::phy_cfg_t ho_src_phy_cfg;
-  mac_interface_rrc::mac_cfg_t ho_src_mac_cfg;
   bool pending_mob_reconf;
   LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT mob_reconf;
 
-  // timeouts in ms
-
-  uint32_t connecting_timeout;
-  static const uint32_t RRC_CONNECTING_TIMEOUT = 5000;
-
-  uint32_t plmn_select_timeout;
-  static const uint32_t RRC_PLMN_SELECT_TIMEOUT = 10000;
-
   uint8_t k_rrc_enc[32];
   uint8_t k_rrc_int[32];
   uint8_t k_up_enc[32];
@@ -341,7 +383,7 @@ private:
   srslte::mac_interface_timers *mac_timers;
   uint32_t n310_cnt, N310;
   uint32_t n311_cnt, N311;
-  uint32_t t300, t301, t310, t311, t304;
+  uint32_t t300, t301, t302, t310, t311, t304;
 
   // Radio bearers
   typedef enum{
@@ -376,42 +418,35 @@ private:
   std::vector<cell_t*> neighbour_cells;
   cell_t *serving_cell;
   void set_serving_cell(uint32_t cell_idx);
-  void set_serving_cell(uint32_t earfcn, uint32_t pci);
+  void set_serving_cell(phy_interface_rrc::phy_cell_t phy_cell);
 
   int  find_neighbour_cell(uint32_t earfcn, uint32_t pci);
   bool add_neighbour_cell(uint32_t earfcn, uint32_t pci, float rsrp);
-  bool add_neighbour_cell(uint32_t earfcn, srslte_cell_t phy_cell, float rsrp);
+  bool add_neighbour_cell(phy_interface_rrc::phy_cell_t phy_cell, float rsrp);
   bool add_neighbour_cell(cell_t *cell);
   void sort_neighbour_cells();
   void clean_neighbours();
   std::vector<cell_t*>::iterator delete_neighbour(std::vector<cell_t*>::iterator it);
   void delete_neighbour(uint32_t cell_idx);
 
-  typedef enum {
+  bool               configure_serving_cell();
-    SI_ACQUIRE_IDLE = 0,
-    SI_ACQUIRE_SIB1,
-    SI_ACQUIRE_SIB2
-  } si_acquire_state_t;
 
-  si_acquire_state_t si_acquire_state;
+  bool               si_acquire(uint32_t index);
-  void               run_si_acquisition_procedure();
   uint32_t           sib_start_tti(uint32_t tti, uint32_t period, uint32_t offset, uint32_t sf);
-  uint32_t           nof_sib1_trials;
+  const static int SIB_SEARCH_TIMEOUT_MS = 1000;
-  uint16_t           sysinfo_index;
-  uint32_t           last_win_start;
 
-  bool select_next_cell_in_plmn();
+  const static uint32_t NOF_REQUIRED_SIBS = 3; // SIB1, SIB2 and SIB3
-  LIBLTE_RRC_PLMN_IDENTITY_STRUCT selected_plmn_id;
 
-  bool thread_running;
+  bool initiated;
-  void run_thread();
+  bool ho_start;
+  bool go_idle;
 
   // Measurements sub-class
   class rrc_meas {
   public:
     void init(rrc *parent);
     void reset();
-    void parse_meas_config(LIBLTE_RRC_MEAS_CONFIG_STRUCT *meas_config);
+    bool parse_meas_config(LIBLTE_RRC_MEAS_CONFIG_STRUCT *meas_config);
     void new_phy_meas(uint32_t earfcn, uint32_t pci, float rsrp, float rsrq, uint32_t tti);
     void run_tti(uint32_t tti);
     bool timer_expired(uint32_t timer_id);
@@ -500,6 +535,18 @@ private:
 
   rrc_meas measurements;
 
+  // Measurement object from phy
+  typedef struct {
+    float rsrp;
+    float rsrq;
+    uint32_t tti;
+    uint32_t earfcn;
+    uint32_t pci;
+  } phy_meas_t;
+
+  void process_phy_meas();
+  void process_new_phy_meas(phy_meas_t meas);
+  std::queue<phy_meas_t> phy_meas_q;
 
   // Cell selection/reselection functions/variables
   typedef struct {
@@ -510,25 +557,36 @@ private:
     float s_intrasearchP;
     float q_hyst;
     float threshservinglow;
-
   } cell_resel_cfg_t;
 
   cell_resel_cfg_t cell_resel_cfg;
 
   float         get_srxlev(float Qrxlevmeas);
   float         get_squal(float Qqualmeas);
-  void          cell_reselection_eval(float rsrp, float rsrq);
-  bool          cell_selection_eval(float rsrp, float rsrq = 0);
 
-  bool connection_requested;
+  typedef enum {
-  void plmn_select_rrc(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id);
+    CHANGED_CELL = 0,
+    SAME_CELL    = 1,
+    NO_CELL      = 2
+  } cs_ret_t;
+
+  cs_ret_t      cell_selection();
+  bool          cell_selection_criteria(float rsrp, float rsrq = 0);
+  void          cell_reselection(float rsrp, float rsrq);
+
+  phy_interface_rrc::cell_search_ret_t cell_search();
+
+  LIBLTE_RRC_PLMN_IDENTITY_STRUCT selected_plmn_id;
+  bool plmn_is_selected;
+
+  bool security_is_activated;
 
   // RLC interface
   void          max_retx_attempted();
 
   // Senders
-  void          send_con_request();
+  void          send_con_request(LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM cause);
-  void          send_con_restablish_request(LIBLTE_RRC_CON_REEST_REQ_CAUSE_ENUM cause, uint16_t crnti);
+  void          send_con_restablish_request(LIBLTE_RRC_CON_REEST_REQ_CAUSE_ENUM cause);
   void          send_con_restablish_complete();
   void          send_con_setup_complete(byte_buffer_t *nas_msg);
   void          send_ul_info_transfer(byte_buffer_t *nas_msg);
@@ -542,16 +600,15 @@ private:
   void          parse_dl_info_transfer(uint32_t lcid, byte_buffer_t *pdu);
 
   // Helpers
-  void          ho_failed();
+  bool          con_reconfig(LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT *reconfig);
+  void          con_reconfig_failed();
+  bool          con_reconfig_ho(LIBLTE_RRC_CONNECTION_RECONFIGURATION_STRUCT *reconfig);
   bool          ho_prepare();
-  void          ho_synced(uint32_t target_pci);
+  void          ho_failed();
   void          rrc_connection_release();
-  void          con_restablish_cell_reselected();
   void          radio_link_failure();
   void          leave_connected();
 
-  static void*  start_sib_thread(void *rrc_);
-  void          sib_search();
   void          apply_rr_config_common_dl(LIBLTE_RRC_RR_CONFIG_COMMON_STRUCT *config);
   void          apply_rr_config_common_ul(LIBLTE_RRC_RR_CONFIG_COMMON_STRUCT *config);
   void          handle_sib1();
@@ -566,7 +623,7 @@ private:
   void          add_srb(LIBLTE_RRC_SRB_TO_ADD_MOD_STRUCT *srb_cnfg);
   void          add_drb(LIBLTE_RRC_DRB_TO_ADD_MOD_STRUCT *drb_cnfg);
   void          release_drb(uint8_t lcid);
-  void          apply_rr_config_dedicated(LIBLTE_RRC_RR_CONFIG_DEDICATED_STRUCT *cnfg);
+  bool          apply_rr_config_dedicated(LIBLTE_RRC_RR_CONFIG_DEDICATED_STRUCT *cnfg);
   void          apply_phy_config_dedicated(LIBLTE_RRC_PHYSICAL_CONFIG_DEDICATED_STRUCT *phy_cnfg, bool apply_defaults); 
   void          apply_mac_config_dedicated(LIBLTE_RRC_MAC_MAIN_CONFIG_STRUCT *mac_cfg, bool apply_defaults); 
   

srsue/hdr/upper/rrc_common.h

@@ -33,27 +33,11 @@ namespace srsue {
 // RRC states (3GPP 36.331 v10.0.0)
 typedef enum {
   RRC_STATE_IDLE = 0,
-  RRC_STATE_PLMN_START,
-  RRC_STATE_PLMN_SELECTION,
-  RRC_STATE_CELL_SELECTING,
-  RRC_STATE_CELL_SELECTED,
-  RRC_STATE_CONNECTING,
   RRC_STATE_CONNECTED,
-  RRC_STATE_HO_PREPARE,
-  RRC_STATE_HO_PROCESS,
-  RRC_STATE_LEAVE_CONNECTED,
   RRC_STATE_N_ITEMS,
 } rrc_state_t;
 static const char rrc_state_text[RRC_STATE_N_ITEMS][100] = {"IDLE",
-                                                            "PLMN SELECTED",
+                                                            "CONNECTED"};
-                                                            "PLMN SELECTION",
-                                                            "CELL SELECTING",
-                                                            "CELL SELECTED",
-                                                            "CONNECTING",
-                                                            "CONNECTED",
-                                                            "HO PREPARE",
-                                                            "HO PROCESS",
-                                                            "LEAVE CONNECTED"};
 
 } // namespace srsue
 

srsue/src/mac/demux.cc

@@ -107,27 +107,29 @@ void demux::push_pdu_temp_crnti(uint8_t *buff, uint32_t nof_bytes)
     
     Debug("Saved MAC PDU with Temporal C-RNTI in buffer\n");
     
-    pdus.push(buff, nof_bytes);
+    pdus.push(buff, nof_bytes, srslte::pdu_queue::DCH);
   } else {
     Warning("Trying to push PDU with payload size zero\n");
   }
 }
 
 /* Demultiplexing of logical channels and dissassemble of MAC CE
- * This function enqueues the packet and returns quicly because ACK 
+ * This function enqueues the packet and returns quickly because ACK
  * deadline is important here.
  */
 void demux::push_pdu(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp) {
-  return pdus.push(buff, nof_bytes, tstamp);
+  return pdus.push(buff, nof_bytes, srslte::pdu_queue::DCH, tstamp);
 }
 
 /* Demultiplexing of MAC PDU associated with SI-RNTI. The PDU passes through
 * the MAC in transparent mode.
-* Warning: In this case function sends the message to RLC now, since SI blocks do not
-* require ACK feedback to be transmitted quickly.
 */
 void demux::push_pdu_bcch(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp) {
-  rlc->write_pdu_bcch_dlsch(buff, nof_bytes);
+  pdus.push(buff, nof_bytes, srslte::pdu_queue::BCH, tstamp);
+}
+
+void demux::push_pdu_mch(uint8_t *buff, uint32_t nof_bytes, uint32_t tstamp) {
+  pdus.push(buff, nof_bytes, srslte::pdu_queue::MCH, tstamp);
 }
 
 bool demux::process_pdus()
@@ -135,15 +137,25 @@ bool demux::process_pdus()
   return pdus.process_pdus();
 }
 
-void demux::process_pdu(uint8_t *mac_pdu, uint32_t nof_bytes, uint32_t tstamp)
+void demux::process_pdu(uint8_t *mac_pdu, uint32_t nof_bytes, srslte::pdu_queue::channel_t channel, uint32_t tstamp)
 {
+  Debug("Processing MAC PDU channel %d\n", channel);
+  switch(channel) {
+    case srslte::pdu_queue::DCH:
       // Unpack DLSCH MAC PDU
       mac_msg.init_rx(nof_bytes);
       mac_msg.parse_packet(mac_pdu);
 
       process_sch_pdu(&mac_msg);
       //srslte_vec_fprint_byte(stdout, mac_pdu, nof_bytes);
-  Debug("MAC PDU processed\n");
+      break;
+    case srslte::pdu_queue::BCH:
+      rlc->write_pdu_bcch_dlsch(mac_pdu, nof_bytes);
+      break;
+    case srslte::pdu_queue::MCH:
+      // Process downlink MCH
+      break;
+  }
 }
 
 void demux::process_sch_pdu(srslte::sch_pdu *pdu_msg)

srsue/src/mac/mac.cc

@@ -41,27 +41,21 @@
 
 namespace srsue {
 
-mac::mac() : ttisync(10240), 
+mac::mac() : timers(64),
-             timers(64),
              mux_unit(MAC_NOF_HARQ_PROC),
              pdu_process_thread(&demux_unit)
 {
-  started = false;
   pcap    = NULL;
   bzero(&metrics, sizeof(mac_metrics_t));
 }
 
 bool mac::init(phy_interface_mac *phy, rlc_interface_mac *rlc, rrc_interface_mac *rrc, srslte::log *log_h_)
 {
-  started = false;
   phy_h = phy;
   rlc_h = rlc;
   rrc_h = rrc;
   log_h = log_h_;
   tti = 0;
-  is_synchronized = false;
-  last_temporal_crnti = 0;
-  phy_rnti = 0;
 
   srslte_softbuffer_rx_init(&pch_softbuffer, 100);
 
@@ -79,23 +73,18 @@ bool mac::init(phy_interface_mac *phy, rlc_interface_mac *rlc, rrc_interface_mac
 
   reset();
 
-  started = true;
+  start_periodic(1000, MAC_MAIN_THREAD_PRIO);
-  start(MAC_MAIN_THREAD_PRIO);
 
-  mactimers.init(&timers, log_h);
+  return true;
-
-  return started;
 }
 
 void mac::stop()
 {
   srslte_softbuffer_rx_free(&pch_softbuffer);
 
-  started = false;
-  ttisync.increase();
   pdu_process_thread.stop();
+  stop_thread();
   wait_thread_finish();
-  mactimers.stop();
 }
 
 void mac::start_pcap(srslte::mac_pcap* pcap_)
@@ -150,32 +139,11 @@ void mac::reset()
   bzero(&uernti, sizeof(ue_rnti_t));
 }
 
-void mac::mac_timers::init(srslte::timers *timers, srslte::log *log_h) {
+void mac::run_period() {
-  this->timers = timers;
-  running = true;
-  this->log_h = log_h;
-  start_periodic(1000);
-}
-
-void mac::mac_timers::run_period() {
-  timers->step_all();
-}
-
-void mac::run_thread() {
-  int cnt=0;
-
-  while (!phy_h->sync_status() && started) {
-    usleep(5000);
-    if (phy_h->sync_status()) {
-      Debug("Setting ttysync to %d\n", phy_h->get_current_tti());
-      ttisync.set_producer_cntr(phy_h->get_current_tti());
-    }
-  }
-
-  while(started) {
 
   /* Warning: Here order of invocation of procedures is important!! */
-    tti = ttisync.wait();
+
+  tti = phy_h->get_current_tti();
 
   log_h->step(tti);
 
@@ -199,10 +167,10 @@ void mac::run_thread() {
   if (sr_procedure.need_random_access()) {
     ra_procedure.start_mac_order();
   }
-    ra_procedure.step(tti);
 
+  ra_procedure.step(tti);
+  timers.step_all();
   rrc_h->run_tti(tti);
-  }
 }
 
 void mac::bcch_start_rx()
@@ -221,28 +189,17 @@ void mac::bcch_start_rx(int si_window_start, int si_window_length)
   Info("SCHED: Searching for DL grant for SI-RNTI window_st=%d, window_len=%d\n", si_window_start, si_window_length);
 }
 
-void mac::bcch_stop_rx()
-{
-  phy_h->pdcch_dl_search_reset();
-}
-
 void mac::pcch_start_rx()
 {
   phy_h->pdcch_dl_search(SRSLTE_RNTI_PCH, SRSLTE_PRNTI);
   Info("SCHED: Searching for DL grant for P-RNTI\n");
 }
 
-void mac::pcch_stop_rx()
+void mac::clear_rntis()
 {
   phy_h->pdcch_dl_search_reset();
 }
 
-
-void mac::tti_clock(uint32_t tti)
-{
-  ttisync.increase(tti);
-}
-
 void mac::bch_decoded_ok(uint8_t* payload, uint32_t len)
 {
   // Send MIB to RLC

srsue/src/main.cc

@@ -77,6 +77,7 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
     ("rf.time_adv_nsamples", bpo::value<string>(&args->rf.time_adv_nsamples)->default_value("auto"),
      "Transmission time advance")
     ("rf.burst_preamble_us", bpo::value<string>(&args->rf.burst_preamble)->default_value("auto"), "Transmission time advance")
+    ("rf.continuous_tx", bpo::value<string>(&args->rf.continuous_tx)->default_value("auto"), "Transmit samples continuously to the radio or on bursts (auto/yes/no). Default is auto (yes for UHD, no for rest)")
 
     ("rrc.feature_group", bpo::value<uint32_t>(&args->rrc.feature_group)->default_value(0xe6041c00), "Hex value of the featureGroupIndicators field in the"
                                                                                            "UECapabilityInformation message. Default 0xe6041c00")
@@ -159,6 +160,10 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
      bpo::value<bool>(&args->expert.pregenerate_signals)->default_value(false),
      "Pregenerate uplink signals after attach. Improves CPU performance.")
 
+    ("expert.print_buffer_state",
+     bpo::value<bool>(&args->expert.print_buffer_state)->default_value(false),
+     "Prints on the console the buffer state every 10 seconds")
+
     ("expert.rssi_sensor_enabled",
      bpo::value<bool>(&args->expert.phy.rssi_sensor_enabled)->default_value(false),
      "Enable or disable RF frontend RSSI sensor. In some USRP devices can cause segmentation fault")
@@ -261,18 +266,22 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
      bpo::value<bool>(&args->expert.phy.average_subframe_enabled)->default_value(true),
      "Averages in the time domain the channel estimates within 1 subframe. Needs accurate CFO correction.")
 
-    ("expert.time_correct_period",
+    ("expert.estimator_fil_auto",
-     bpo::value<int>(&args->expert.phy.time_correct_period)->default_value(5),
+     bpo::value<bool>(&args->expert.phy.estimator_fil_auto)->default_value(false),
-     "Period for sampling time offset correction.")
+     "The channel estimator smooths the channel estimate with an adaptative filter.")
+
+    ("expert.estimator_fil_stddev",
+     bpo::value<float>(&args->expert.phy.estimator_fil_stddev)->default_value(1.0f),
+     "Sets the channel estimator smooth gaussian filter standard deviation.")
+
+    ("expert.estimator_fil_order",
+     bpo::value<uint32_t>(&args->expert.phy.estimator_fil_order)->default_value(4),
+     "Sets the channel estimator smooth gaussian filter order (even values perform better).")
 
     ("expert.sss_algorithm",
      bpo::value<string>(&args->expert.phy.sss_algorithm)->default_value("full"),
      "Selects the SSS estimation algorithm.")
 
-    ("expert.estimator_fil_w",
-     bpo::value<float>(&args->expert.phy.estimator_fil_w)->default_value(0.1),
-     "Chooses the coefficients for the 3-tap channel estimator centered filter.")
-
     ("expert.pdsch_csi_enabled",
      bpo::value<bool>(&args->expert.phy.pdsch_csi_enabled)->default_value(false),
      "Stores the Channel State Information and uses it for weightening the softbits. It is only compatible with TM1.")
@@ -470,18 +479,25 @@ int main(int argc, char *argv[])
   pthread_t input;
   pthread_create(&input, NULL, &input_loop, &args);
 
-  bool plot_started = false;
+  printf("Attaching UE...\n");
-  bool signals_pregenerated = false;
+  while (!ue->attach() && running) {
-
+    sleep(1);
-  while (running) {
+  }
-    if (ue->is_attached()) {
+  if (running) {
-      if (!signals_pregenerated && args.expert.pregenerate_signals) {
+    if (args.expert.pregenerate_signals) {
       ue->pregenerate_signals(true);
-        signals_pregenerated = true;
     }
-      if (!plot_started && args.gui.enable) {
+    if (args.gui.enable) {
       ue->start_plot();
-        plot_started = true;
+    }
+  }
+  int cnt=0;
+  while (running) {
+    if (args.expert.print_buffer_state) {
+      cnt++;
+      if (cnt==10) {
+        cnt=0;
+        ue->print_pool();
       }
     }
     sleep(1);

srsue/src/phy/phch_common.cc

@@ -248,7 +248,7 @@ void phch_common::worker_end(uint32_t tti, bool tx_enable,
     radio_h->tx_single(buffer, nof_samples, tx_time);
     is_first_of_burst = false; 
   } else {
-    if (TX_MODE_CONTINUOUS) {
+    if (radio_h->is_continuous_tx()) {
       if (!is_first_of_burst) {
         radio_h->tx_single(zeros, nof_samples, tx_time);
       }
@@ -342,11 +342,13 @@ void phch_common::reset() {
   cur_radio_power = 0;
   sr_last_tx_tti = -1;
   cur_pusch_power = 0;
+  avg_snr_db_cqi = 0;
+  avg_snr_db_sync = 0;
   avg_rsrp = 0;
+  avg_rsrp_cqi = 0;
   avg_rsrp_dbm = 0;
   avg_rsrq_db = 0;
 
-  pcell_meas_enabled  = false;
   pcell_report_period = 20;
 
   bzero(pending_ack, sizeof(pending_ack_t)*TTIMOD_SZ);

srsue/src/phy/phch_worker.cc

@@ -133,6 +133,7 @@ bool phch_worker::init(uint32_t max_prb, srslte::log *log_h, srslte::log *log_ph
     return false;
   }
 
+  srslte_chest_dl_set_rsrp_neighbour(&ue_dl.chest, true);
   srslte_chest_dl_average_subframe(&ue_dl.chest, phy->args->average_subframe_enabled);
   srslte_chest_dl_cfo_estimate_enable(&ue_dl.chest, phy->args->cfo_ref_mask!=0, phy->args->cfo_ref_mask);
   srslte_ue_ul_set_normalization(&ue_ul, true);
@@ -185,6 +186,11 @@ void phch_worker::set_tti(uint32_t tti_, uint32_t tx_tti_)
   log_phy_lib_h->step(tti);
 }
 
+void phch_worker::set_prach(cf_t *prach_ptr, float prach_power) {
+  this->prach_ptr   = prach_ptr;
+  this->prach_power = prach_power;
+}
+
 void phch_worker::set_cfo(float cfo_)
 {
   cfo = cfo_;
@@ -319,6 +325,14 @@ void phch_worker::work_imp()
 
   /***** Uplink Processing + Transmission *******/
 
+  bool signal_ready = false;
+  cf_t *signal_ptr = NULL;
+
+  /* Transmit PRACH if pending, or PUSCH/PUCCH otherwise */
+  if (prach_ptr) {
+    signal_ready = true;
+    signal_ptr   = prach_ptr;
+  } else {
     /* Generate SR if required*/
     set_uci_sr();
 
@@ -349,7 +363,6 @@ void phch_worker::work_imp()
     srslte_ue_ul_set_cfo(&ue_ul, cfo);
 
     /* Transmit PUSCH, PUCCH or SRS */
-  bool signal_ready = false; 
     if (ul_action.tx_enabled) {
       encode_pusch(&ul_action.phy_grant.ul, ul_action.payload_ptr[0], ul_action.current_tx_nb,
                    &ul_action.softbuffers[0], ul_action.rv[0], ul_action.rnti, ul_mac_grant.is_from_rar);
@@ -365,13 +378,16 @@ void phch_worker::work_imp()
       encode_srs();
       signal_ready = true;
     }
+    signal_ptr = signal_buffer[0];
+  }
+
 
   tr_log_end();
 
   if (next_offset > 0) {
-    phy->worker_end(tx_tti, signal_ready, signal_buffer[0], SRSLTE_SF_LEN_PRB(cell.nof_prb)+next_offset, tx_time);
+    phy->worker_end(tx_tti, signal_ready, signal_ptr, SRSLTE_SF_LEN_PRB(cell.nof_prb)+next_offset, tx_time);
   } else {
-    phy->worker_end(tx_tti, signal_ready, &signal_buffer[0][-next_offset], SRSLTE_SF_LEN_PRB(cell.nof_prb)+next_offset, tx_time);
+    phy->worker_end(tx_tti, signal_ready, &signal_ptr[-next_offset], SRSLTE_SF_LEN_PRB(cell.nof_prb)+next_offset, tx_time);
   }
 
   if (!dl_action.generate_ack_callback) {
@@ -391,13 +407,13 @@ void phch_worker::work_imp()
   update_measurements();
 
   if (chest_ok) {
-    if (phy->avg_rsrp_dbm > -130.0 && phy->avg_snr_db > -10.0) {
+    if (phy->avg_rsrp_sync_dbm > -130.0 && phy->avg_snr_db_sync > -10.0) {
       log_h->debug("SNR=%.1f dB, RSRP=%.1f dBm sync=in-sync from channel estimator\n",
-                   phy->avg_snr_db, phy->avg_rsrp_dbm);
+                   phy->avg_snr_db_sync, phy->avg_rsrp_sync_dbm);
       chest_loop->in_sync();
     } else {
       log_h->warning("SNR=%.1f dB RSRP=%.1f dBm, sync=out-of-sync from channel estimator\n",
-                     phy->avg_snr_db, phy->avg_rsrp_dbm);
+                     phy->avg_snr_db_sync, phy->avg_rsrp_sync_dbm);
       chest_loop->out_of_sync();
     }
   }
@@ -429,24 +445,23 @@ void phch_worker::compute_ri(uint8_t *ri, uint8_t *pmi, float *sinr) {
     }
     uci_data.uci_ri_len = 1;
   } else if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4) {
+    if (sinr) {
       srslte_ue_dl_ri_pmi_select(&ue_dl, ri, pmi, sinr);
       Debug("TM4 ri=%d; pmi=%d; SINR=%.1fdB\n", ue_dl.ri, ue_dl.pmi[ue_dl.ri], 10*log10f(ue_dl.sinr[ue_dl.ri][ue_dl.pmi[ue_dl.ri]]));
     }
+  }
 }
 
 bool phch_worker::extract_fft_and_pdcch_llr() {
   bool decode_pdcch = true;
 
-  /* Without a grant, we might need to do fft processing if need to decode PHICH */
+  // Do always channel estimation to keep track of out-of-sync and send measurements to RRC
-  if (phy->get_pending_ack(tti) || decode_pdcch) {
 
   // Setup estimator filter
-    float w_coeff = phy->args->estimator_fil_w; 
+  srslte_chest_dl_set_smooth_filter_gauss(&ue_dl.chest,
-    if (w_coeff > 0.0) {
+                                          phy->args->estimator_fil_order,
-      srslte_chest_dl_set_smooth_filter3_coeff(&ue_dl.chest, w_coeff); 
+                                          phy->args->estimator_fil_stddev);
-    } else if (w_coeff == 0.0) {
+  srslte_chest_dl_set_smooth_filter_auto(&ue_dl.chest, phy->args->estimator_fil_auto);
-      srslte_chest_dl_set_smooth_filter(&ue_dl.chest, NULL, 0); 
-    }
 
   if (!phy->args->snr_estim_alg.compare("refs")) {
     srslte_chest_dl_set_noise_alg(&ue_dl.chest, SRSLTE_NOISE_ALG_REFS);
@@ -461,9 +476,14 @@ bool phch_worker::extract_fft_and_pdcch_llr() {
     return false;
   }
   chest_done = true;
-  } else {
+
-    chest_done = false; 
+  if (srslte_ue_dl_decode_fft_estimate(&ue_dl, tti%10, &cfi) < 0) {
+    Error("Getting PDCCH FFT estimate\n");
+    return false;
   }
+
+  chest_done = true;
+
   if (chest_done && decode_pdcch) { /* and not in DRX mode */
     
     float noise_estimate = phy->avg_noise;
@@ -504,13 +524,13 @@ bool phch_worker::decode_pdcch_dl(srsue::mac_interface_phy::mac_grant_t* grant)
     srslte_ra_dl_dci_t dci_unpacked;
 
     if (type == SRSLTE_RNTI_RAR) {
-      Info("Looking for RNTI=0x%x\n", dl_rnti);
+      Debug("Looking for RNTI=0x%x\n", dl_rnti);
     }
 
     if (srslte_ue_dl_find_dl_dci_type(&ue_dl, phy->config->dedicated.antenna_info_explicit_value.tx_mode, cfi, tti%10,
                                       dl_rnti, type, &dci_msg) != 1) {
       if (type == SRSLTE_RNTI_RAR) {
-        Info("RAR not found, SNR=%.1f dB, tti=%d, cfi=%d, tx_mode=%d, cell_id=%d\n",
+        Debug("RAR not found, SNR=%.1f dB, tti=%d, cfi=%d, tx_mode=%d, cell_id=%d\n",
              10*log10(srslte_chest_dl_get_snr(&ue_dl.chest)), tti, cfi,
              phy->config->dedicated.antenna_info_explicit_value.tx_mode, cell.id);
       }
@@ -908,16 +928,16 @@ void phch_worker::set_uci_periodic_cqi()
       if (period_cqi.format_is_subband) {
         // TODO: Implement subband periodic reports
         cqi_report.type = SRSLTE_CQI_TYPE_SUBBAND;
-        cqi_report.subband.subband_cqi = srslte_cqi_from_snr(phy->avg_snr_db);
+        cqi_report.subband.subband_cqi = srslte_cqi_from_snr(phy->avg_snr_db_cqi);
         cqi_report.subband.subband_label = 0;
         log_h->console("Warning: Subband CQI periodic reports not implemented\n");
-        Debug("PUCCH: Periodic CQI=%d, SNR=%.1f dB\n", cqi_report.subband.subband_cqi, phy->avg_snr_db);
+        Debug("PUCCH: Periodic CQI=%d, SNR=%.1f dB\n", cqi_report.subband.subband_cqi, phy->avg_snr_db_cqi);
       } else {
         cqi_report.type = SRSLTE_CQI_TYPE_WIDEBAND;
         if (cqi_fixed >= 0) {
           cqi_report.wideband.wideband_cqi = cqi_fixed;
         } else {
-          cqi_report.wideband.wideband_cqi = srslte_cqi_from_snr(phy->avg_snr_db);      
+          cqi_report.wideband.wideband_cqi = srslte_cqi_from_snr(phy->avg_snr_db_cqi);      
         }
         if (cqi_max >= 0 && cqi_report.wideband.wideband_cqi > cqi_max) {
           cqi_report.wideband.wideband_cqi = cqi_max; 
@@ -927,7 +947,7 @@ void phch_worker::set_uci_periodic_cqi()
           cqi_report.wideband.pmi = phy->last_pmi;
           cqi_report.wideband.rank_is_not_one = (phy->last_ri != 0);
         }
-        Debug("PUCCH: Periodic CQI=%d, SNR=%.1f dB\n", cqi_report.wideband.wideband_cqi, phy->avg_snr_db);
+        Debug("PUCCH: Periodic CQI=%d, SNR=%.1f dB\n", cqi_report.wideband.wideband_cqi, phy->avg_snr_db_cqi);
       }
       uci_data.uci_cqi_len = (uint32_t) srslte_cqi_value_pack(&cqi_report, uci_data.uci_cqi);
       rar_cqi_request = false;       
@@ -957,7 +977,7 @@ void phch_worker::set_uci_aperiodic_cqi()
         if (rnti_is_set) {
           srslte_cqi_value_t cqi_report = {0};
           cqi_report.type = SRSLTE_CQI_TYPE_SUBBAND_HL;
-          cqi_report.subband_hl.wideband_cqi_cw0 = srslte_cqi_from_snr(phy->avg_snr_db);
+          cqi_report.subband_hl.wideband_cqi_cw0 = srslte_cqi_from_snr(phy->avg_snr_db_cqi);
 
           // TODO: implement subband CQI properly
           cqi_report.subband_hl.subband_diff_cqi_cw0 = 0; // Always report zero offset on all subbands
@@ -983,7 +1003,7 @@ void phch_worker::set_uci_aperiodic_cqi()
           }
 
           Info("PUSCH: Aperiodic RM30 CQI=%s, %sSNR=%.1f dB, for %d subbands\n",
-               cqi_str, (uci_data.uci_ri_len)?((uci_data.uci_ri == 0)?"ri=0, ":"ri=1, "):"", phy->avg_snr_db, cqi_report.subband_hl.N);
+               cqi_str, (uci_data.uci_ri_len)?((uci_data.uci_ri == 0)?"ri=0, ":"ri=1, "):"", phy->avg_snr_db_cqi, cqi_report.subband_hl.N);
         }
         break;
       case LIBLTE_RRC_CQI_REPORT_MODE_APERIODIC_RM31:
@@ -1396,18 +1416,18 @@ void phch_worker::update_measurements()
       }
     }
     
-    // Average RSRQ
+    // Average RSRQ over DEFAULT_MEAS_PERIOD_MS then sent to RRC
     float rsrq_db = 10*log10(srslte_chest_dl_get_rsrq(&ue_dl.chest));
     if (isnormal(rsrq_db)) {
-      if (!phy->avg_rsrq_db) {
+      if (!(tti%phy->pcell_report_period) || !phy->avg_rsrq_db) {
-        phy->avg_rsrq_db = SRSLTE_VEC_EMA(rsrq_db, phy->avg_rsrq_db, snr_ema_coeff);
-      } else {
         phy->avg_rsrq_db = rsrq_db;
+      } else {
+        phy->avg_rsrq_db = SRSLTE_VEC_CMA(rsrq_db, phy->avg_rsrq_db, tti%phy->pcell_report_period);
       }
     }
 
-    // Average RSRP
+    // Average RSRP taken from CRS
-    float rsrp_lin = srslte_chest_dl_get_rsrp(&ue_dl.chest);
+    float rsrp_lin = srslte_chest_dl_get_rsrp_neighbour(&ue_dl.chest);
     if (isnormal(rsrp_lin)) {
       if (!phy->avg_rsrp) {
         phy->avg_rsrp = SRSLTE_VEC_EMA(rsrp_lin, phy->avg_rsrp, snr_ema_coeff);
@@ -1419,16 +1439,18 @@ void phch_worker::update_measurements()
     /* Correct absolute power measurements by RX gain offset */
     float rsrp_dbm = 10*log10(rsrp_lin) + 30 - phy->rx_gain_offset;
 
-    // Serving cell measurements are averaged over DEFAULT_MEAS_PERIOD_MS then sent to RRC
+    // Serving cell RSRP measurements are averaged over DEFAULT_MEAS_PERIOD_MS then sent to RRC
     if (isnormal(rsrp_dbm)) {
-      if (!phy->avg_rsrp_dbm) {
+      if (!(tti%phy->pcell_report_period) || !phy->avg_rsrp_dbm) {
         phy->avg_rsrp_dbm = rsrp_dbm;
       } else {
-        phy->avg_rsrp_dbm = SRSLTE_VEC_EMA(rsrp_dbm, phy->avg_rsrp_dbm, snr_ema_coeff);
+        phy->avg_rsrp_dbm = SRSLTE_VEC_CMA(rsrp_dbm, phy->avg_rsrp_dbm, tti%phy->pcell_report_period);
       }
-      if ((tti%phy->pcell_report_period) == 0 && phy->pcell_meas_enabled) {
-        phy->rrc->new_phy_meas(phy->avg_rsrp_dbm, phy->avg_rsrq_db, tti);
     }
+
+    // Send PCell measurement
+    if ((tti%phy->pcell_report_period) == phy->pcell_report_period-1) {
+      phy->rrc->new_phy_meas(phy->avg_rsrp_dbm, phy->avg_rsrq_db, tti);
     }
 
     // Compute PL
@@ -1445,8 +1467,28 @@ void phch_worker::update_measurements()
       }
     }
 
-    // Compute SNR
+    // To compute CQI use RSRP measurements from resource elements in RS since is more robust to time offset
-    phy->avg_snr_db = 10*log10(phy->avg_rsrp/phy->avg_noise);
+    float rsrp_lin_cqi = srslte_chest_dl_get_rsrp(&ue_dl.chest);
+    if (isnormal(rsrp_lin_cqi)) {
+      if (!phy->avg_rsrp_cqi) {
+        phy->avg_rsrp_cqi = SRSLTE_VEC_EMA(rsrp_lin_cqi, phy->avg_rsrp_cqi, snr_ema_coeff);
+      } else {
+        phy->avg_rsrp_cqi = rsrp_lin_cqi;
+      }
+    }
+    float rsrp_sync_dbm = 10*log10(rsrp_lin_cqi) + 30 - phy->rx_gain_offset;
+    if (isnormal(rsrp_sync_dbm)) {
+      if (!phy->avg_rsrp_sync_dbm) {
+        phy->avg_rsrp_sync_dbm = rsrp_sync_dbm;
+      } else {
+        phy->avg_rsrp_sync_dbm = SRSLTE_VEC_EMA(rsrp_sync_dbm, phy->avg_rsrp_sync_dbm, snr_ema_coeff);
+      }
+    }
+
+    // We compute 2 SNR metrics, 1 for deciding in-sync/out-of-sync and another for CQI measurements
+    phy->avg_snr_db_cqi  = 10*log10(phy->avg_rsrp_cqi/phy->avg_noise); // this for CQI
+    phy->avg_snr_db_sync = 10*log10(phy->avg_rsrp/phy->avg_noise);     // this for sync
+
 
     // Store metrics
     dl_metrics.n      = phy->avg_noise;
@@ -1454,7 +1496,7 @@ void phch_worker::update_measurements()
     dl_metrics.rsrq   = phy->avg_rsrq_db;
     dl_metrics.rssi   = phy->avg_rssi_dbm;
     dl_metrics.pathloss = phy->pathloss;
-    dl_metrics.sinr   = phy->avg_snr_db;
+    dl_metrics.sinr   = phy->avg_snr_db_cqi;
     dl_metrics.turbo_iters = srslte_pdsch_last_noi(&ue_dl.pdsch);
     phy->set_dl_metrics(dl_metrics);
 

srsue/src/phy/phy.cc

@@ -96,9 +96,10 @@ void phy::set_default_args(phy_args_t *args)
   args->equalizer_mode      = "mmse"; 
   args->cfo_integer_enabled = false; 
   args->cfo_correct_tol_hz  = 50; 
-  args->time_correct_period = 5; 
   args->sss_algorithm       = "full";
-  args->estimator_fil_w     = 0.1; 
+  args->estimator_fil_auto  = false;
+  args->estimator_fil_stddev = 1.0f;
+  args->estimator_fil_order  = 4;
 }
 
 bool phy::check_args(phy_args_t *args) 
@@ -107,10 +108,6 @@ bool phy::check_args(phy_args_t *args)
     log_h->console("Error in PHY args: nof_phy_threads must be 1, 2 or 3\n");
     return false; 
   }
-  if (args->estimator_fil_w > 1.0) {
-    log_h->console("Error in PHY args: estimator_fil_w must be 0<=w<=1\n");
-    return false; 
-  }
   if (args->snr_ema_coeff > 1.0) {
     log_h->console("Error in PHY args: snr_ema_coeff must be 0<=w<=1\n");
     return false; 
@@ -250,20 +247,6 @@ void phy::configure_ul_params(bool pregen_disabled)
   }
 }
 
-void phy::cell_search_start()
-{
-  sf_recv.cell_search_start();
-}
-
-void phy::cell_search_next()
-{
-  sf_recv.cell_search_next();
-}
-
-void phy::sync_reset() {
-  sf_recv.reset_sync();
-}
-
 void phy::meas_reset() {
   sf_recv.meas_reset();
 }
@@ -276,13 +259,16 @@ int phy::meas_stop(uint32_t earfcn, int pci) {
   return sf_recv.meas_stop(earfcn, pci);
 }
 
-void phy::cell_select(uint32_t earfcn, srslte_cell_t phy_cell)
+bool phy::cell_select(phy_cell_t *cell) {
-{
+  return sf_recv.cell_select(cell);
-  sf_recv.cell_select(earfcn, phy_cell);
+}
+
+phy_interface_rrc::cell_search_ret_t  phy::cell_search(phy_cell_t *cell) {
+  return sf_recv.cell_search(cell);
 }
 
-bool phy::cell_handover(srslte_cell_t cell) {
+bool phy::cell_is_camping() {
-  return sf_recv.cell_handover(cell);
+  return sf_recv.cell_is_camping();
 }
 
 float phy::get_phr()
@@ -348,13 +334,14 @@ int phy::prach_tx_tti()
 
 // Handle the case of a radio overflow. Resynchronise inmediatly
 void phy::radio_overflow() {
-  sf_recv.reset_sync();
+  sf_recv.radio_overflow();
 }
 
 void phy::reset()
 {
   Info("Resetting PHY\n");
   n_ta = 0;
+  sf_recv.set_time_adv_sec(0);
   pdcch_dl_search_reset();
   for(uint32_t i=0;i<nof_workers;i++) {
     workers[i].reset();
@@ -388,11 +375,6 @@ void phy::force_freq(float dl_freq, float ul_freq)
   sf_recv.force_freq(dl_freq, ul_freq);
 }
 
-bool phy::sync_status()
-{
-  return sf_recv.status_is_sync();
-}
-
 void phy::set_rar_grant(uint32_t tti, uint8_t grant_payload[SRSLTE_RAR_GRANT_LEN])
 {
   workers_common.set_rar_grant(tti, grant_payload);

srsue/src/phy/prach.cc

@@ -75,7 +75,7 @@ void prach::init(LIBLTE_RRC_PRACH_CONFIG_SIB_STRUCT *config_, uint32_t max_prb,
     return;
   }
   srslte_cfo_set_tol(&cfo_h, 0);
-  signal_buffer = (cf_t *) srslte_vec_malloc(SRSLTE_PRACH_MAX_LEN * sizeof(cf_t));
+  signal_buffer = (cf_t *) srslte_vec_malloc(MAX_LEN_SF * 30720 * sizeof(cf_t));
   if (!signal_buffer) {
     perror("malloc");
     return;
@@ -159,10 +159,10 @@ bool prach::is_pending() {
 bool prach::is_ready_to_send(uint32_t current_tti_) {
   if (is_pending()) {
     // consider the number of subframes the transmission must be anticipated 
-    uint32_t current_tti = (current_tti_ + tx_advance_sf)%10240;
+    uint32_t tti_tx = TTI_TX(current_tti_);
-    if (srslte_prach_tti_opportunity(&prach_obj, current_tti, allowed_subframe)) {
+    if (srslte_prach_tti_opportunity(&prach_obj, tti_tx, allowed_subframe)) {
-      Debug("PRACH Buffer: Ready to send at tti: %d (now is %d)\n", current_tti, current_tti_);
+      Debug("PRACH Buffer: Ready to send at tti: %d (now is %d)\n", tti_tx, current_tti_);
-      transmitted_tti = current_tti; 
+      transmitted_tti = tti_tx;
       return true; 
     }
   }
@@ -173,55 +173,31 @@ int prach::tx_tti() {
   return transmitted_tti; 
 }
 
-float prach::get_p0_preamble()
+cf_t *prach::generate(float cfo, uint32_t *nof_sf, float *target_power) {
-{
-  return target_power_dbm; 
-}
-
 
-void prach::send(srslte::radio *radio_handler, float cfo, float pathloss, srslte_timestamp_t tx_time)
+  if (cell_initiated && preamble_idx >= 0 && nof_sf) {
-{
-  
-  // Get current TX gain 
-  float old_gain = radio_handler->get_tx_gain(); 
 
     // Correct CFO before transmission FIXME: UL SISO Only
     srslte_cfo_correct(&cfo_h, buffer[preamble_idx], signal_buffer, cfo / srslte_symbol_sz(cell.nof_prb));
 
-  // If power control is enabled, choose amplitude and power 
+    // pad guard symbols with zeros
-  if (args->ul_pwr_ctrl_en) {
+    uint32_t nsf = (len-1)/SRSLTE_SF_LEN_PRB(cell.nof_prb)+1;
-    // Get PRACH transmission power 
+    bzero(&signal_buffer[len], (nsf*SRSLTE_SF_LEN_PRB(cell.nof_prb)-len)*sizeof(cf_t));
-    float tx_power = SRSLTE_MIN(SRSLTE_PC_MAX, pathloss + target_power_dbm);
-    
-    // Get output power for amplitude 1
-    radio_handler->set_tx_power(tx_power);
 
-    // Scale signal
+    *nof_sf = nsf;
-    float digital_power = srslte_vec_avg_power_cf(signal_buffer, len);
-    float scale = sqrtf(pow(10,tx_power/10)/digital_power);
 
-    srslte_vec_sc_prod_cfc(signal_buffer, scale, signal_buffer, len);
+    if (target_power) {
-    log_h->console("PRACH: Pathloss=%.2f dB, Target power %.2f dBm, TX_power %.2f dBm, TX_gain %.1f dB, scale %.2f\n",
+      *target_power = target_power_dbm;
-          pathloss, target_power_dbm, tx_power, radio_handler->get_tx_gain(), scale);
-    
-  } else {
-    float prach_gain = args->prach_gain; 
-    if (prach_gain > 0) {
-      radio_handler->set_tx_gain(prach_gain);
-    }
-    Debug("TX PRACH: Power control for PRACH is disabled, setting gain to %.0f dB\n", prach_gain);
     }
 
-  void *tmp_buffer[SRSLTE_MAX_PORTS] = {signal_buffer, NULL, NULL, NULL};
+    Info("PRACH: Transmitted preamble=%d, CFO=%.2f KHz, nof_sf=%d, target_power=%.1f dBm\n",
-  radio_handler->tx(tmp_buffer, len, tx_time);
+         preamble_idx, cfo*15, nsf, target_power_dbm);
-  radio_handler->tx_end();
-  
-  Info("PRACH: Transmitted preamble=%d, CFO=%.2f KHz, tx_time=%f\n", 
-       preamble_idx, cfo*15, tx_time.frac_secs);
     preamble_idx = -1;
 
-  radio_handler->set_tx_gain(old_gain);
+    return signal_buffer;
-  Debug("Restoring TX gain to %.0f dB\n", old_gain);  
+  } else {
+    return NULL;
+  }
 }
   
 } // namespace srsue

srsue/src/ue.cc

@@ -160,6 +160,9 @@ bool ue::init(all_args_t *args_)
   if (args->rf.burst_preamble.compare("auto")) {
     radio.set_burst_preamble(atof(args->rf.burst_preamble.c_str()));    
   }
+  if (args->rf.continuous_tx.compare("auto")) {
+    radio.set_continuous_tx(args->rf.continuous_tx.compare("yes")?false:true);
+  }
 
   radio.set_manual_calibration(&args->rf_cal);
 
@@ -226,7 +229,6 @@ bool ue::init(all_args_t *args_)
   }
 
   printf("...\n");
-  nas.attach_request();
 
   started = true;
   return true;
@@ -273,6 +275,14 @@ void ue::stop()
   }
 }
 
+bool ue::attach() {
+  return nas.attach_request();
+}
+
+bool ue::deattach() {
+  return nas.deattach_request();
+}
+
 bool ue::is_attached()
 {
   return rrc.is_connected();

srsue/src/upper/gw.cc

@@ -248,10 +248,8 @@ void gw::run_thread()
     return;
   }
 
-  const static uint32_t ATTACH_TIMEOUT_MS   = 10000;
+  const static uint32_t ATTACH_WAIT_TOUT = 40; // 4 sec
-  const static uint32_t ATTACH_MAX_ATTEMPTS = 3;
+  uint32_t attach_wait = 0;
-  uint32_t attach_cnt = 0;
-  uint32_t attach_attempts = 0;
 
   gw_log->info("GW IP packet receiver thread run_enable\n");
 
@@ -278,25 +276,18 @@ void gw::run_thread()
         {
           gw_log->info_hex(pdu->msg, pdu->N_bytes, "TX PDU");
 
-          while(run_enable && !pdcp->is_drb_enabled(cfg.lcid) && attach_attempts < ATTACH_MAX_ATTEMPTS) {
+          while(run_enable && !pdcp->is_drb_enabled(cfg.lcid) && attach_wait < ATTACH_WAIT_TOUT) {
-            if (attach_cnt == 0) {
+            if (!attach_wait) {
-              gw_log->info("LCID=%d not active, requesting NAS attach (%d/%d)\n", cfg.lcid, attach_attempts, ATTACH_MAX_ATTEMPTS);
+              gw_log->info("LCID=%d not active, requesting NAS attach (%d/%d)\n", cfg.lcid, attach_wait, ATTACH_WAIT_TOUT);
-              nas->attach_request();
+              if (!nas->attach_request()) {
-              attach_attempts++;
+                gw_log->warning("Could not re-establish the connection\n");
               }
-            attach_cnt++;
-            if (attach_cnt == ATTACH_TIMEOUT_MS) {
-              attach_cnt = 0;
             }
-            usleep(1000);
+            usleep(100000);
-          }
+            attach_wait++;
-
-          if (attach_attempts == ATTACH_MAX_ATTEMPTS) {
-            gw_log->warning("LCID=%d was not active after %d attempts\n", cfg.lcid, ATTACH_MAX_ATTEMPTS);
           }
 
-          attach_attempts = 0;
+          attach_wait = 0;
-          attach_cnt = 0;
 
           if (!run_enable) {
             break;

srsue/src/upper/nas.cc

@@ -45,10 +45,13 @@ namespace srsue {
  ********************************************************************/
 
 nas::nas()
-  : state(EMM_STATE_DEREGISTERED), plmn_selection(PLMN_SELECTED), have_guti(false), have_ctxt(false), ip_addr(0), eps_bearer_id(0)
+  : state(EMM_STATE_DEREGISTERED), have_guti(false), have_ctxt(false), ip_addr(0), eps_bearer_id(0)
 {
   ctxt.rx_count = 0;
   ctxt.tx_count = 0;
+  ctxt.cipher_algo = CIPHERING_ALGORITHM_ID_EEA0;
+  ctxt.integ_algo = INTEGRITY_ALGORITHM_ID_EIA0;
+  plmn_is_selected = false;
 }
 
 void nas::init(usim_interface_nas *usim_,
@@ -63,7 +66,6 @@ void nas::init(usim_interface_nas *usim_,
   gw = gw_;
   nas_log = nas_log_;
   state = EMM_STATE_DEREGISTERED;
-  plmn_selection = PLMN_NOT_SELECTED;
 
   if (!usim->get_home_plmn_id(&home_plmn)) {
     nas_log->error("Getting Home PLMN Id from USIM. Defaulting to 001-01\n");
@@ -80,9 +82,11 @@ void nas::init(usim_interface_nas *usim_,
     have_guti = true;
     have_ctxt = true;
   }
+  running = true;
 }
 
 void nas::stop() {
+  running = false;
   write_ctxt_file(ctxt);
 }
 
@@ -94,71 +98,173 @@ emm_state_t nas::get_state() {
  * UE interface
  ******************************************************************************/
 
-void nas::attach_request() {
+/** Blocking function to Attach to the network and establish RRC connection if not established.
+ * The function returns true if the UE could attach correctly or false in case of error or timeout during attachment.
+ *
+ */
+bool nas::attach_request() {
+  rrc_interface_nas::found_plmn_t found_plmns[rrc_interface_nas::MAX_FOUND_PLMNS];
+  int nof_plmns = 0;
+
   nas_log->info("Attach Request\n");
-  if (state == EMM_STATE_DEREGISTERED) {
+  switch (state) {
-    state = EMM_STATE_REGISTERED_INITIATED;
+    case EMM_STATE_DEREGISTERED:
-    if (plmn_selection == PLMN_NOT_SELECTED) {
+
-      nas_log->info("Starting PLMN Search...\n");
+      // Search PLMN is not selected
-      rrc->plmn_search();
+      if (!plmn_is_selected) {
-    } else if (plmn_selection == PLMN_SELECTED) {
+        nas_log->info("No PLMN selected. Starting PLMN Search...\n");
-      nas_log->info("Selecting PLMN %s\n", plmn_id_to_string(current_plmn).c_str());
+        nof_plmns = rrc->plmn_search(found_plmns);
+        if (nof_plmns > 0) {
+          // Save PLMNs
+          known_plmns.clear();
+          for (int i=0;i<nof_plmns;i++) {
+            known_plmns.push_back(found_plmns[i].plmn_id);
+            nas_log->info("Found PLMN:  Id=%s, TAC=%d\n", plmn_id_to_string(found_plmns[i].plmn_id).c_str(),
+                          found_plmns[i].tac);
+            nas_log->console("Found PLMN:  Id=%s, TAC=%d\n", plmn_id_to_string(found_plmns[i].plmn_id).c_str(),
+                             found_plmns[i].tac);
+          }
+          select_plmn();
+        } else if (nof_plmns == 0) {
+          nas_log->warning("Did not find any PLMN in the set of frequencies\n");
+          return false;
+        } else if (nof_plmns < 0) {
+          nas_log->error("Error while searching for PLMNs\n");
+          return false;
+        }
+      }
+      // Select PLMN in request establishment of RRC connection
+      if (plmn_is_selected) {
         rrc->plmn_select(current_plmn);
-      selecting_plmn = current_plmn;
+        if (rrc_connect()) {
+          nas_log->info("NAS attached successfully.\n");
+          return true;
+        } else {
+          nas_log->error("Could not attach in attach request\n");
         }
-  } else if (state == EMM_STATE_REGISTERED) {
-    nas_log->info("NAS state is registered, selecting current PLMN\n");
-    rrc->plmn_select(current_plmn, true);
       } else {
+        nas_log->error("PLMN is not selected because no suitable PLMN was found\n");
+      }
+      break;
+    case EMM_STATE_REGISTERED:
+      if (rrc->is_connected()) {
+        nas_log->info("NAS is already registered and RRC connected\n");
+        return true;
+      } else {
+        nas_log->info("NAS is already registered but RRC disconnected. Connecting now...\n");
+        if (rrc_connect()) {
+          nas_log->info("NAS attached successfully.\n");
+          return true;
+        } else {
+          nas_log->error("Could not attach from attach_request\n");
+        }
+      }
+      break;
+    default:
       nas_log->info("Attach request ignored. State = %s\n", emm_state_text[state]);
   }
+  return false;
 }
 
-void nas::deattach_request() {
+bool nas::deattach_request() {
   state = EMM_STATE_DEREGISTERED_INITIATED;
   nas_log->info("Dettach request not supported\n");
+  return false;
 }
 
-/*******************************************************************************
- * RRC interface
- ******************************************************************************/
 
-bool nas::plmn_found(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, uint16_t tracking_area_code) {
+bool nas::is_attached() {
+  return state == EMM_STATE_REGISTERED;
+}
 
-  // Check if already registered
+void nas::paging(LIBLTE_RRC_S_TMSI_STRUCT *ue_identiy) {
-  for (uint32_t i=0;i<known_plmns.size();i++) {
+  if (state == EMM_STATE_REGISTERED) {
-    if (plmn_id.mcc == known_plmns[i].mcc && plmn_id.mnc == known_plmns[i].mnc) {
+    nas_log->info("Received paging: requesting RRC connection establishment\n");
-      nas_log->info("Found known PLMN Id=%s\n", plmn_id_to_string(plmn_id).c_str());
+    if (rrc_connect()) {
-      if (plmn_id.mcc == home_plmn.mcc && plmn_id.mnc == home_plmn.mnc) {
+      nas_log->info("Attached successfully\n");
-        nas_log->info("Connecting Home PLMN Id=%s\n", plmn_id_to_string(plmn_id).c_str());
+    } else {
-        rrc->plmn_select(plmn_id, state == EMM_STATE_REGISTERED_INITIATED);
+      nas_log->error("Could not attach from paging\n");
-        selecting_plmn = plmn_id;
+    }
+  } else {
+    nas_log->warning("Received paging while in state %s\n", emm_state_text[state]);
+  }
+}
+
+void nas::set_barring(barring_t barring) {
+  current_barring = barring;
+}
+
+/* Internal function that requests RRC connection, waits for positive or negative response and returns true/false
+ */
+bool nas::rrc_connect() {
+  if (rrc->is_connected()) {
+    nas_log->info("Already connected\n");
     return true;
   }
-      return false;
+
+  // Generate service request or attach request message
+  byte_buffer_t *dedicatedInfoNAS = pool_allocate;
+  if (state == EMM_STATE_REGISTERED) {
+    gen_service_request(dedicatedInfoNAS);
+  } else {
+    gen_attach_request(dedicatedInfoNAS);
   }
+
+  // Provide UE-Identity to RRC if have one
+  if (have_guti) {
+    LIBLTE_RRC_S_TMSI_STRUCT s_tmsi;
+    s_tmsi.mmec   = ctxt.guti.mme_code;
+    s_tmsi.m_tmsi = ctxt.guti.m_tmsi;
+    rrc->set_ue_idenity(s_tmsi);
   }
 
-  // Save if new PLMN
+  // Set establishment cause
-  known_plmns.push_back(plmn_id);
+  LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM establish_cause = LIBLTE_RRC_CON_REQ_EST_CAUSE_MO_SIGNALLING;
 
-  nas_log->info("Found PLMN:  Id=%s, TAC=%d\n", plmn_id_to_string(plmn_id).c_str(),
+  if (rrc->connection_request(establish_cause, dedicatedInfoNAS))
-                tracking_area_code);
+  {
-  nas_log->console("Found PLMN:  Id=%s, TAC=%d\n", plmn_id_to_string(plmn_id).c_str(),
+    nas_log->info("Connection established correctly. Waiting for Attach\n");
-                tracking_area_code);
 
-  if (plmn_id.mcc == home_plmn.mcc && plmn_id.mnc == home_plmn.mnc) {
+    // Wait until attachment. If doing a service request is already attached
-    rrc->plmn_select(plmn_id, state == EMM_STATE_REGISTERED_INITIATED);
+    uint32_t tout = 0;
-    selecting_plmn = plmn_id;
+    while (tout < 5000 && state != EMM_STATE_REGISTERED && running && rrc->is_connected()) {
+      usleep(1000);
+      tout++;
+    }
+    if (state == EMM_STATE_REGISTERED) {
+      nas_log->info("EMM Registered correctly\n");
       return true;
+    } else if (state == EMM_STATE_DEREGISTERED) {
+      nas_log->error("Timeout or received attach reject while trying to attach\n");
+      nas_log->console("Failed to Attach\n");
+    } else if (!rrc->is_connected()) {
+      nas_log->error("Was disconnected while attaching\n");
+    } else {
+      nas_log->error("Timed out while trying to attach\n");
+    }
+  } else {
+    nas_log->error("Could not establish RRC connection\n");
+    pool->deallocate(dedicatedInfoNAS);
   }
   return false;
 }
 
-// RRC indicates that the UE has gone through all EARFCN and finished PLMN selection
+void nas::select_plmn() {
-void nas::plmn_search_end() {
+
+  plmn_is_selected = false;
+
+  // First find if Home PLMN is available
+  for (uint32_t i=0;i<known_plmns.size();i++) {
+    if (known_plmns[i].mcc == home_plmn.mcc && known_plmns[i].mnc == home_plmn.mnc) {
+      nas_log->info("Selecting Home PLMN Id=%s\n", plmn_id_to_string(known_plmns[i]).c_str());
+      plmn_is_selected = true;
+      current_plmn = known_plmns[i];
+      return;
+    }
+  }
+
+  // If not, select the first available PLMN
   if (known_plmns.size() > 0) {
-    if (home_plmn.mcc != known_plmns[0].mcc && home_plmn.mnc != known_plmns[0].mnc) {
     nas_log->info("Could not find Home PLMN Id=%s, trying to connect to PLMN Id=%s\n",
                   plmn_id_to_string(home_plmn).c_str(),
                   plmn_id_to_string(known_plmns[0]).c_str());
@@ -166,32 +272,11 @@ void nas::plmn_search_end() {
     nas_log->console("Could not find Home PLMN Id=%s, trying to connect to PLMN Id=%s\n",
                      plmn_id_to_string(home_plmn).c_str(),
                      plmn_id_to_string(known_plmns[0]).c_str());
+    plmn_is_selected = true;
+    current_plmn = known_plmns[0];
   }
-    rrc->plmn_select(known_plmns[0], state == EMM_STATE_REGISTERED_INITIATED);
-  } else {
-    nas_log->info("Finished searching PLMN in current EARFCN set but no networks were found.\n");
-    if (state == EMM_STATE_REGISTERED_INITIATED && plmn_selection == PLMN_NOT_SELECTED) {
-      rrc->plmn_search();
-    }
-  }
-}
-
-bool nas::is_attached() {
-  return state == EMM_STATE_REGISTERED;
 }
 
-bool nas::is_attaching() {
-  return state == EMM_STATE_REGISTERED_INITIATED;
-}
-
-void nas::notify_connection_setup() {
-  nas_log->debug("State = %s\n", emm_state_text[state]);
-  if (EMM_STATE_REGISTERED_INITIATED == state) {
-    send_attach_request();
-  } else {
-    send_service_request();
-  }
-}
 
 void nas::write_pdu(uint32_t lcid, byte_buffer_t *pdu) {
   uint8 pd = 0;
@@ -271,16 +356,6 @@ uint32_t nas::get_ul_count() {
   return ctxt.tx_count;
 }
 
-bool nas::get_s_tmsi(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi) {
-  if (have_guti) {
-    s_tmsi->mmec   = ctxt.guti.mme_code;
-    s_tmsi->m_tmsi = ctxt.guti.m_tmsi;
-    return true;
-  } else {
-    return false;
-  }
-}
-
 bool nas::get_k_asme(uint8_t *k_asme_, uint32_t n) {
   if(!have_ctxt) {
     nas_log->error("K_asme requested before security context established\n");
@@ -350,7 +425,7 @@ bool nas::integrity_check(byte_buffer_t *pdu)
     return NULL;
   }
   if (pdu->N_bytes > 5) {
-    uint8_t exp_mac[4];
+    uint8_t exp_mac[4] = {0};
     uint8_t *mac = &pdu->msg[1];
     int i;
 
@@ -408,7 +483,7 @@ void nas::cipher_encrypt(byte_buffer_t *pdu)
       memcpy(&pdu->msg[6], &pdu_tmp.msg[6], pdu->N_bytes-6);
       break;
   default:
-      nas_log->error("Ciphering algorithmus not known");
+      nas_log->error("Ciphering algorithm not known\n");
       break;
   }
 }
@@ -474,10 +549,10 @@ void nas::parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu) {
     return;
   }
 
-  LIBLTE_MME_ATTACH_ACCEPT_MSG_STRUCT attach_accept;
+  LIBLTE_MME_ATTACH_ACCEPT_MSG_STRUCT attach_accept = {0};
-  LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT act_def_eps_bearer_context_req;
+  LIBLTE_MME_ATTACH_COMPLETE_MSG_STRUCT attach_complete = {0};
-  LIBLTE_MME_ATTACH_COMPLETE_MSG_STRUCT attach_complete;
+  LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_REQUEST_MSG_STRUCT act_def_eps_bearer_context_req = {0};
-  LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT act_def_eps_bearer_context_accept;
+  LIBLTE_MME_ACTIVATE_DEFAULT_EPS_BEARER_CONTEXT_ACCEPT_MSG_STRUCT act_def_eps_bearer_context_accept = {0};
 
   nas_log->info("Received Attach Accept\n");
 
@@ -489,6 +564,11 @@ void nas::parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu) {
     if (attach_accept.guti_present) {
       memcpy(&ctxt.guti, &attach_accept.guti.guti, sizeof(LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT));
       have_guti = true;
+      // Update RRC UE-Idenity
+      LIBLTE_RRC_S_TMSI_STRUCT s_tmsi;
+      s_tmsi.mmec   = ctxt.guti.mme_code;
+      s_tmsi.m_tmsi = ctxt.guti.m_tmsi;
+      rrc->set_ue_idenity(s_tmsi);
     }
     if (attach_accept.lai_present) {}
     if (attach_accept.ms_id_present) {}
@@ -511,7 +591,7 @@ void nas::parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu) {
       ip_addr |= act_def_eps_bearer_context_req.pdn_addr.addr[3];
 
       nas_log->info("Network attach successful. APN: %s, IP: %u.%u.%u.%u\n",
-                    act_def_eps_bearer_context_req.apn.apn.c_str(),
+                    act_def_eps_bearer_context_req.apn.apn,
                     act_def_eps_bearer_context_req.pdn_addr.addr[0],
                     act_def_eps_bearer_context_req.pdn_addr.addr[1],
                     act_def_eps_bearer_context_req.pdn_addr.addr[2],
@@ -554,8 +634,6 @@ void nas::parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu) {
     // FIXME: Setup the default EPS bearer context
 
     state = EMM_STATE_REGISTERED;
-    current_plmn = selecting_plmn;
-    plmn_selection = PLMN_SELECTED;
 
     ctxt.rx_count++;
 
@@ -599,7 +677,7 @@ void nas::parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu) {
 }
 
 void nas::parse_attach_reject(uint32_t lcid, byte_buffer_t *pdu) {
-  LIBLTE_MME_ATTACH_REJECT_MSG_STRUCT attach_rej;
+  LIBLTE_MME_ATTACH_REJECT_MSG_STRUCT attach_rej = {0};
 
   liblte_mme_unpack_attach_reject_msg((LIBLTE_BYTE_MSG_STRUCT *) pdu, &attach_rej);
   nas_log->warning("Received Attach Reject. Cause= %02X\n", attach_rej.emm_cause);
@@ -611,7 +689,9 @@ void nas::parse_attach_reject(uint32_t lcid, byte_buffer_t *pdu) {
 
 void nas::parse_authentication_request(uint32_t lcid, byte_buffer_t *pdu) {
   LIBLTE_MME_AUTHENTICATION_REQUEST_MSG_STRUCT auth_req;
+  bzero(&auth_req, sizeof(LIBLTE_MME_AUTHENTICATION_REQUEST_MSG_STRUCT));
   LIBLTE_MME_AUTHENTICATION_RESPONSE_MSG_STRUCT auth_res;
+  bzero(&auth_res, sizeof(LIBLTE_MME_AUTHENTICATION_RESPONSE_MSG_STRUCT));
 
   nas_log->info("Received Authentication Request\n");
   liblte_mme_unpack_authentication_request_msg((LIBLTE_BYTE_MSG_STRUCT *) pdu, &auth_req);
@@ -666,8 +746,8 @@ void nas::parse_authentication_reject(uint32_t lcid, byte_buffer_t *pdu) {
 }
 
 void nas::parse_identity_request(uint32_t lcid, byte_buffer_t *pdu) {
-  LIBLTE_MME_ID_REQUEST_MSG_STRUCT  id_req;
+  LIBLTE_MME_ID_REQUEST_MSG_STRUCT  id_req = {0};
-  LIBLTE_MME_ID_RESPONSE_MSG_STRUCT id_resp;
+  LIBLTE_MME_ID_RESPONSE_MSG_STRUCT id_resp = {0};
 
   liblte_mme_unpack_identity_request_msg((LIBLTE_BYTE_MSG_STRUCT *) pdu, &id_req);
   nas_log->info("Received Identity Request. ID type: %d\n", id_req.id_type);
@@ -711,7 +791,9 @@ void nas::parse_security_mode_command(uint32_t lcid, byte_buffer_t *pdu)
   }
 
   LIBLTE_MME_SECURITY_MODE_COMMAND_MSG_STRUCT sec_mode_cmd;
+  bzero(&sec_mode_cmd, sizeof(LIBLTE_MME_SECURITY_MODE_COMMAND_MSG_STRUCT));
   LIBLTE_MME_SECURITY_MODE_COMPLETE_MSG_STRUCT sec_mode_comp;
+  bzero(&sec_mode_comp, sizeof(LIBLTE_MME_SECURITY_MODE_COMPLETE_MSG_STRUCT));
 
   liblte_mme_unpack_security_mode_command_msg((LIBLTE_BYTE_MSG_STRUCT *) pdu, &sec_mode_cmd);
   nas_log->info("Received Security Mode Command ksi: %d, eea: %s, eia: %s\n",
@@ -838,21 +920,19 @@ void nas::parse_emm_information(uint32_t lcid, byte_buffer_t *pdu) {
  * Senders
  ******************************************************************************/
 
-void nas::send_attach_request() {
+void nas::gen_attach_request(byte_buffer_t *msg) {
-
-
-  LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT attach_req;
-  byte_buffer_t *msg = pool_allocate;
   if (!msg) {
-    nas_log->error("Fatal Error: Couldn't allocate PDU in send_attach_request().\n");
+    nas_log->error("Fatal Error: Couldn't allocate PDU in gen_attach_request().\n");
     return;
   }
+  LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT attach_req;
+  bzero(&attach_req, sizeof(LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT));
 
-  u_int32_t i;
+  nas_log->info("Generating attach request\n");
 
   attach_req.eps_attach_type = LIBLTE_MME_EPS_ATTACH_TYPE_EPS_ATTACH;
 
-  for (i = 0; i < 8; i++) {
+  for (u_int32_t i = 0; i < 8; i++) {
     attach_req.ue_network_cap.eea[i] = eea_caps[i];
     attach_req.ue_network_cap.eia[i] = eia_caps[i];
   }
@@ -915,16 +995,49 @@ void nas::send_attach_request() {
     pcap->write_nas(msg->msg, msg->N_bytes);
   }
 
-  nas_log->info("Sending attach request\n");
-  rrc->write_sdu(cfg.lcid, msg);
-
   if (have_ctxt) {
     ctxt.tx_count++;
   }
 }
 
+
+void nas::gen_service_request(byte_buffer_t *msg) {
+  if (!msg) {
+    nas_log->error("Fatal Error: Couldn't allocate PDU in gen_service_request().\n");
+    return;
+  }
+
+  nas_log->info("Generating service request\n");
+
+  // Pack the service request message directly
+  msg->msg[0] = (LIBLTE_MME_SECURITY_HDR_TYPE_SERVICE_REQUEST << 4) | (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
+  msg->N_bytes++;
+  msg->msg[1] = (ctxt.ksi & 0x07) << 5;
+  msg->msg[1] |= ctxt.tx_count & 0x1F;
+  msg->N_bytes++;
+
+  uint8_t mac[4];
+  integrity_generate(&k_nas_int[16],
+                     ctxt.tx_count,
+                     SECURITY_DIRECTION_UPLINK,
+                     &msg->msg[0],
+                     2,
+                     &mac[0]);
+  // Set the short MAC
+  msg->msg[2] = mac[2];
+  msg->N_bytes++;
+  msg->msg[3] = mac[3];
+  msg->N_bytes++;
+
+  if(pcap != NULL) {
+    pcap->write_nas(msg->msg, msg->N_bytes);
+  }
+
+  ctxt.tx_count++;
+}
+
 void nas::gen_pdn_connectivity_request(LIBLTE_BYTE_MSG_STRUCT *msg) {
-  LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT pdn_con_req;
+  LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT pdn_con_req = {0};
 
   nas_log->info("Generating PDN Connectivity Request\n");
 
@@ -940,8 +1053,8 @@ void nas::gen_pdn_connectivity_request(LIBLTE_BYTE_MSG_STRUCT *msg) {
     pdn_con_req.apn_present = false;
   } else {
     pdn_con_req.apn_present = true;
-    LIBLTE_MME_ACCESS_POINT_NAME_STRUCT apn;
+    LIBLTE_MME_ACCESS_POINT_NAME_STRUCT apn = {0};
-    apn.apn = cfg.apn;
+    strncpy(apn.apn, cfg.apn.c_str(), LIBLTE_STRING_LEN);
     pdn_con_req.apn = apn;
   }
   pdn_con_req.protocol_cnfg_opts_present = false;
@@ -958,7 +1071,7 @@ void nas::send_security_mode_reject(uint8_t cause) {
     return;
   }
 
-  LIBLTE_MME_SECURITY_MODE_REJECT_MSG_STRUCT sec_mode_rej;
+  LIBLTE_MME_SECURITY_MODE_REJECT_MSG_STRUCT sec_mode_rej = {0};
   sec_mode_rej.emm_cause = cause;
   liblte_mme_pack_security_mode_reject_msg(&sec_mode_rej, (LIBLTE_BYTE_MSG_STRUCT *) msg);
   if(pcap != NULL) {
@@ -970,42 +1083,6 @@ void nas::send_security_mode_reject(uint8_t cause) {
 
 void nas::send_identity_response() {}
 
-void nas::send_service_request() {
-  byte_buffer_t *msg = pool_allocate;
-  if (!msg) {
-    nas_log->error("Fatal Error: Couldn't allocate PDU in send_service_request().\n");
-    return;
-  }
-
-  // Pack the service request message directly
-  msg->msg[0] = (LIBLTE_MME_SECURITY_HDR_TYPE_SERVICE_REQUEST << 4) | (LIBLTE_MME_PD_EPS_MOBILITY_MANAGEMENT);
-  msg->N_bytes++;
-  msg->msg[1] = (ctxt.ksi & 0x07) << 5;
-  msg->msg[1] |= ctxt.tx_count & 0x1F;
-  msg->N_bytes++;
-
-  uint8_t mac[4];
-  integrity_generate(&k_nas_int[16],
-                     ctxt.tx_count,
-                     SECURITY_DIRECTION_UPLINK,
-                     &msg->msg[0],
-                     2,
-                     &mac[0]);
-  // Set the short MAC
-  msg->msg[2] = mac[2];
-  msg->N_bytes++;
-  msg->msg[3] = mac[3];
-  msg->N_bytes++;
-
-  if(pcap != NULL) {
-    pcap->write_nas(msg->msg, msg->N_bytes);
-  }
-
-  nas_log->info("Sending service request\n");
-  rrc->write_sdu(cfg.lcid, msg);
-  ctxt.tx_count++;
-}
-
 void nas::send_esm_information_response() {}
 
 

srsue/test/mac/mac_test.cc

@@ -406,13 +406,13 @@ public:
         printf("SIB1 received %d bytes, CellID=%d, si_window=%d, sib2_period=%d\n", 
                 nof_bytes, dlsch_msg.sibs[0].sib.sib1.cell_id&0xfff, si_window_len, sib2_period);          
         sib1_decoded = true;         
-        mac.bcch_stop_rx();        
+        mac.clear_rntis();
       } else if (dlsch_msg.sibs[0].sib_type == LIBLTE_RRC_SYS_INFO_BLOCK_TYPE_2) {
         
         printf("SIB2 received %d bytes\n", nof_bytes);
         setup_mac_phy_sib2(&dlsch_msg.sibs[0].sib.sib2, &mac, &phy);        
         sib2_decoded = true; 
-        mac.bcch_stop_rx();
+        mac.clear_rntis();
       }
     }
   }

srsue/test/phy/ue_itf_test_prach.cc

@@ -380,7 +380,7 @@ int main(int argc, char *argv[])
   radio.set_tx_freq(prog_args.rf_tx_freq);
   
   // Instruct the PHY to configure PRACH parameters and sync to current cell 
-  while(!my_phy.sync_status()) {
+  while(!my_phy.cell_is_camping()) {
     usleep(20000);
   }
 

srsue/test/phy/ue_itf_test_sib1.cc

@@ -196,7 +196,7 @@ int main(int argc, char *argv[])
   
   bool running = true;
   while(running) {
-    if (bch_decoded && my_phy.sync_status()) {
+    if (bch_decoded && my_phy.cell_is_camping()) {
       uint32_t tti = my_phy.get_current_tti();
       
       // SIB1 is scheduled in subframe #5 of even frames, try to decode next frame SIB1
@@ -206,7 +206,7 @@ int main(int argc, char *argv[])
       total_pkts++;       
     }
     usleep(30000);    
-    if (bch_decoded && my_phy.sync_status() && total_pkts > 0) {
+    if (bch_decoded && my_phy.cell_is_camping() && total_pkts > 0) {
       if (srslte_verbose == SRSLTE_VERBOSE_NONE && srsapps_verbose == 0) {
         float gain = prog_args.rf_gain; 
         if (gain < 0) {

srsue/test/upper/nas_test.cc

@@ -50,6 +50,15 @@ uint8_t auth_request_pdu[] = { 0x07, 0x52, 0x01, 0x0c, 0x63, 0xa8, 0x54, 0x13, 0
 uint8_t sec_mode_command_pdu[] = { 0x37, 0x37, 0xc7, 0x67, 0xae, 0x00, 0x07, 0x5d, 0x02, 0x01,
                                    0x02, 0xe0, 0x60, 0xc1 };
 
+uint8_t attach_accept_pdu[] = { 0x27, 0x0f, 0x4f, 0xb3, 0xef, 0x01, 0x07, 0x42, 0x01, 0x3e,
+                                0x06, 0x00, 0x00, 0xf1, 0x10, 0x00, 0x01, 0x00, 0x2a, 0x52,
+                                0x01, 0xc1, 0x01, 0x04, 0x1b, 0x07, 0x74, 0x65, 0x73, 0x74,
+                                0x31, 0x32, 0x33, 0x06, 0x6d, 0x6e, 0x63, 0x30, 0x30, 0x31,
+                                0x06, 0x6d, 0x63, 0x63, 0x30, 0x30, 0x31, 0x04, 0x67, 0x70,
+                                0x72, 0x73, 0x05, 0x01, 0xc0, 0xa8, 0x05, 0x02, 0x27, 0x01,
+                                0x80, 0x50, 0x0b, 0xf6, 0x00, 0xf1, 0x10, 0x80, 0x01, 0x01,
+                                0x35, 0x16, 0x6d, 0xbc, 0x64, 0x01, 0x00 };
+
 uint16 mcc = 61441;
 uint16 mnc = 65281;
 
@@ -71,18 +80,35 @@ public:
 class rrc_dummy : public rrc_interface_nas
 {
 public:
+  rrc_dummy() : last_sdu_len(0) {
+    plmns.plmn_id.mcc = mcc;
+    plmns.plmn_id.mnc = mnc;
+    plmns.tac = 0xffff;
+  }
   void write_sdu(uint32_t lcid, byte_buffer_t *sdu)
   {
-    printf("NAS generated SDU (len=%d):\n", sdu->N_bytes);
     last_sdu_len = sdu->N_bytes;
-    srslte_vec_fprint_byte(stdout, sdu->msg, sdu->N_bytes);
+    //printf("NAS generated SDU (len=%d):\n", sdu->N_bytes);
+    //srslte_vec_fprint_byte(stdout, sdu->msg, sdu->N_bytes);
     byte_buffer_pool::get_instance()->deallocate(sdu);
   }
   std::string get_rb_name(uint32_t lcid) { return std::string("lcid"); }
   uint32_t get_last_sdu_len() { return last_sdu_len; }
 
-  void plmn_search() {};
+  int plmn_search(srsue::rrc_interface_nas::found_plmn_t* found) {
-  void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, bool con_req) {};
+    memcpy(found, &plmns, sizeof(found_plmn_t));
+    return 1;
+  };
+  void plmn_select(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id) {};
+  void set_ue_idenity(LIBLTE_RRC_S_TMSI_STRUCT s_tmsi) {}
+  bool connection_request(LIBLTE_RRC_CON_REQ_EST_CAUSE_ENUM cause, srslte::byte_buffer_t *sdu) {
+    printf("NAS generated SDU (len=%d):\n", sdu->N_bytes);
+    last_sdu_len = sdu->N_bytes;
+    srslte_vec_fprint_byte(stdout, sdu->msg, sdu->N_bytes);
+    byte_buffer_pool::get_instance()->deallocate(sdu);
+    return true;
+  }
+  bool is_connected() {return false;}
 
   uint16_t get_mcc() { return mcc; }
   uint16_t get_mnc() { return mnc; }
@@ -90,6 +116,7 @@ public:
 
 private:
   uint32_t last_sdu_len;
+  found_plmn_t plmns;
 };
 
 class gw_dummy : public gw_interface_nas, public gw_interface_pdcp
@@ -130,15 +157,12 @@ int security_command_test()
   uint8_t res[16];
   usim.init(&args, &usim_log);
 
-  srslte::byte_buffer_pool *pool;
-  pool = byte_buffer_pool::get_instance();
-
   srsue::nas nas;
   srslte_nas_config_t cfg;
   nas.init(&usim, &rrc_dummy, &gw, &nas_log, cfg);
 
   // push auth request PDU to NAS to generate security context
-  byte_buffer_t* tmp = pool->allocate();
+  byte_buffer_t* tmp = byte_buffer_pool::get_instance()->allocate();
   memcpy(tmp->msg, auth_request_pdu, sizeof(auth_request_pdu));
   tmp->N_bytes = sizeof(auth_request_pdu);
   nas.write_pdu(LCID, tmp);
@@ -155,7 +179,7 @@ int security_command_test()
     ret = SRSLTE_SUCCESS;
   }
 
-  pool->cleanup();
+  byte_buffer_pool::get_instance()->cleanup();
 
   return ret;
 }
@@ -190,13 +214,22 @@ int mme_attach_request_test()
   nas.init(&usim, &rrc_dummy, &gw, &nas_log, nas_cfg);
 
   nas.attach_request();
-  nas.notify_connection_setup();
 
-  // check length of generated NAS SDU
+  // this will time out in the first place
+
+  // finally push attach accept
+  byte_buffer_t* tmp = byte_buffer_pool::get_instance()->allocate();
+  memcpy(tmp->msg, attach_accept_pdu, sizeof(attach_accept_pdu));
+  tmp->N_bytes = sizeof(attach_accept_pdu);
+  nas.write_pdu(LCID, tmp);
+
+  // check length of generated NAS SDU (attach complete)
   if (rrc_dummy.get_last_sdu_len() > 3) {
     ret = SRSLTE_SUCCESS;
   }
 
+  byte_buffer_pool::get_instance()->cleanup();
+
   return ret;
 }
 

srsue/ue.conf.example

@@ -21,6 +21,8 @@
 #                     Default "auto". B210 USRP: 100 samples, bladeRF: 27.
 # burst_preamble_us:  Preamble length to transmit before start of burst. 
 #                     Default "auto". B210 USRP: 400 us, bladeRF: 0 us.
+# continuous_tx:      Transmit samples continuously to the radio or on bursts (auto/yes/no).
+#                     Default is auto (yes for UHD, no for rest)
 #####################################################################
 [rf]
 dl_earfcn = 3400
@@ -33,6 +35,7 @@ rx_gain = 40
 #device_args = auto
 #time_adv_nsamples = auto
 #burst_preamble_us = auto
+#continuous_tx     = auto
 
 
 #####################################################################
@@ -150,7 +153,9 @@ enable = false
 #                       sampling frequency offset. Default is enabled. 
 # sss_algorithm:        Selects the SSS estimation algorithm. Can choose between 
 #                       {full, partial, diff}. 
-# estimator_fil_w:      Chooses the coefficients for the 3-tap channel estimator centered filter. 
+# estimator_fil_auto:   The channel estimator smooths the channel estimate with an adaptative filter.
+# estimator_fil_stddev: Sets the channel estimator smooth gaussian filter standard deviation.
+# estimator_fil_order:  Sets the channel estimator smooth gaussian filter order (even values perform better).
 #                       The taps are [w, 1-2w, w]
 # metrics_period_secs:  Sets the period at which metrics are requested from the UE. 
 #
@@ -204,7 +209,9 @@ enable = false
 #time_correct_period = 5
 #sfo_correct_disable = false
 #sss_algorithm       = full
-#estimator_fil_w     = 0.1
+#estimator_fil_auto  = false
+#estimator_fil_stddev  = 1.0
+#estimator_fil_order  = 4
 #average_subframe_enabled = true
 #sic_pss_enabled     = true
 #pregenerate_signals = false