Addes SIB1 packing/unpacking to RRC

lte/examples/cell_measurement.c

@@ -36,6 +36,7 @@
 #include <assert.h>
 #include <signal.h>
 
+#include "liblte/rrc/rrc.h"
 #include "liblte/phy/phy.h"
 #include "liblte/cuhd/cuhd.h"
 #include "cell_search_utils.h"
@@ -105,7 +106,7 @@ void parse_args(prog_args_t *args, int argc, char **argv) {
 /**********************************************************************/
 
 /* TODO: Do something with the output data */
-uint8_t data[10000];
+uint8_t data[10000], data_unpacked[1000];
 
 int cuhd_recv_wrapper(void *h, void *data, uint32_t nsamples) {
   DEBUG(" ----  Receive %d samples  ---- \n", nsamples);
@@ -121,6 +122,7 @@ int main(int argc, char **argv) {
   int64_t sf_cnt;
   ue_sync_t ue_sync; 
   void *uhd; 
+  ue_dl_t ue_dl; 
 
   parse_args(&prog_args, argc, argv);
 
@@ -148,6 +150,11 @@ int main(int argc, char **argv) {
     fprintf(stderr, "Error initiating ue_sync\n");
     exit(-1); 
   }
+  if (ue_dl_init(&ue_dl, cell, 1234)) { 
+    fprintf(stderr, "Error initiating UE downlink processing module\n");
+    exit(-1);
+  }
+  pdsch_set_rnti(&ue_dl.pdsch, SIRNTI);
 
   /* Initialize subframe counter */
   sf_cnt = 0;
@@ -168,6 +175,9 @@ int main(int argc, char **argv) {
   cf_t *sf_symbols = vec_malloc(sf_re * sizeof(cf_t));
   uint32_t nframes=0;
   
+  bool sib1_decoded = false; 
+  int n; 
+  
   /* Main loop */
   while (sf_cnt < prog_args.nof_subframes || prog_args.nof_subframes == -1) {
     
@@ -181,6 +191,20 @@ int main(int argc, char **argv) {
     /* iodev_receive returns 1 if successfully read 1 aligned subframe */
     if (ret == 1) {
 
+      if (!sib1_decoded) {
+        n = ue_dl_decode(&ue_dl, sf_buffer, data, ue_sync_get_sfidx(&ue_sync), SIRNTI);
+        if (n < 0) {
+          fprintf(stderr, "\nError running receiver\n");fflush(stdout);
+          exit(-1);
+        } else if (n > 0) {
+          printf("\n\nDecoded SIB1 Message Len %d: ",n);
+          vec_fprint_hex(stdout, data, n);          
+          bit_unpack_vector(data, data_unpacked, n);
+          bcch_dlsch_sib1_unpack(data_unpacked, n);
+          printf("\n");fflush(stdout);
+          sib1_decoded = true; 
+        }
+      } else {
       /* Run FFT for all subframe data */
         lte_fft_run_sf(&fft, sf_buffer, sf_symbols);
         
@@ -198,7 +222,7 @@ int main(int argc, char **argv) {
                 10*log10(rsrp*1000)-prog_args.uhd_gain, 
               10*log10(rsrq));                
         }
-        
+      }     
     } else if (ret == 0) {
       printf("Finding PSS... Peak: %8.1f, FrameCnt: %d, State: %d\r", 
         sync_get_peak_value(&ue_sync.sfind), 

lte/phy/lib/ch_estimation/src/chest.c

@@ -38,7 +38,7 @@
 #define SLOT_SZ(q) (q->nof_symbols * q->symbol_sz)
 #define SF_SZ(q) (2 * SLOT_SZ(q))
 
-//#define VOLK_INTERP
+#define VOLK_INTERP
 
 void chest_fprint(chest_t *q, FILE *stream, uint32_t nslot, uint32_t port_id) {
   chest_ref_fprint(q, stream, nslot, port_id);

lte/rrc/asn/asn_internal.h

@@ -31,6 +31,8 @@ int get_asn1c_environment_version(void);	/* Run-time version */
 #define	asn_debug_indent	0
 #define ASN_DEBUG_INDENT_ADD(i) do{}while(0)
 
+#define EMIT_ASN_DEBUG 1
+
 /*
  * A macro for debugging the ASN.1 internals.
  * You may enable or override it.

lte/rrc/asn/per_decoder.h

@@ -20,7 +20,7 @@ struct asn_TYPE_descriptor_s;	/* Forward declaration */
  * Unaligned PER decoder of a "complete encoding" as per X.691#10.1.
  * On success, this call always returns (.consumed >= 1), as per X.691#10.1.3.
  */
- asn_dec_rval_t uper_decode_complete(struct asn_codec_ctx_s *opt_codec_ctx,
+ LIBLTE_API asn_dec_rval_t uper_decode_complete(struct asn_codec_ctx_s *opt_codec_ctx,
 	struct asn_TYPE_descriptor_s *type_descriptor,	/* Type to decode */
 	void **struct_ptr,	/* Pointer to a target structure's pointer */
 	const void *buffer,	/* Data to be decoded */

lte/rrc/asn/rrc_asn.h

@@ -28,5 +28,6 @@
 #define EMIT_ASN_DEBUG 1
 
 #include "MasterInformationBlock.h"
+#include "SystemInformationBlockType1.h"
 #include "per_encoder.h"
 #include "xer_encoder.h"

lte/rrc/asn/xer_encoder.h

@@ -38,7 +38,7 @@ asn_enc_rval_t xer_encode(struct asn_TYPE_descriptor_s *type_descriptor,
  * 	-1: Problem printing the structure.
  * WARNING: No sensible errno value is returned.
  */
-int xer_fprint(FILE *stream, struct asn_TYPE_descriptor_s *td, void *sptr);
+LIBLTE_API int xer_fprint(FILE *stream, struct asn_TYPE_descriptor_s *td, void *sptr);
 
 /*
  * Type of the generic XER encoder.

lte/rrc/include/liblte/rrc/rrc_msg/bcch.h

@@ -45,4 +45,9 @@ LIBLTE_API int bcch_bch_mib_unpack(uint8_t *buffer,
                                    lte_cell_t *cell, 
                                    uint32_t *sfn);
 
+LIBLTE_API int bcch_dlsch_sib1_pack(uint8_t *buffer, 
+                                    uint32_t buffer_size_bytes); 
+
+LIBLTE_API int bcch_dlsch_sib1_unpack(uint8_t *buffer, 
+                                      uint32_t msg_nof_bits);
 #endif // AGC_

lte/rrc/lib/rrc_msg/src/bcch.c

@@ -31,6 +31,7 @@
 #include "liblte/rrc/rrc_msg/bcch.h"
 #include "liblte/phy/utils/bit.h"
 #include "rrc_asn.h"
+#include "sib.h"
 
 
 int bcch_bch_mib_pack(lte_cell_t *cell, uint32_t sfn, uint8_t *buffer, uint32_t buffer_size_bytes) {
@@ -155,3 +156,43 @@ int bcch_bch_mib_unpack(uint8_t *buffer, uint32_t msg_nof_bits, lte_cell_t *cell
   }
   return LIBLTE_SUCCESS;
 }
+
+
+int bcch_dlsch_sib1_pack(uint8_t *buffer, uint32_t buffer_size_bytes) {
+  SystemInformationBlockType1_t req; 
+  
+  MCC_MNC_Digit_t mcc[3] = {1,0,1};
+  MCC_MNC_Digit_t mnc[2] = {2,3};
+  uint8_t tac_val[2] = {0x10,0x20};
+  uint8_t cid_val[4] = {0x3,0x4,0x5,0x6};
+  printf("calling create\n");
+  sib1_create_default(&req, mcc, mnc, tac_val, cid_val, 6);
+  printf("calling encode\n");
+  asn_enc_rval_t n = uper_encode_to_buffer(&asn_DEF_SystemInformationBlockType1, (void*) &req, buffer, 200);
+  if (n.encoded == -1) {
+    printf("Encoding failed.\n");
+    printf("Failed to encode element %s\n", n.failed_type ? n.failed_type->name : "");
+    return LIBLTE_ERROR;
+  } 
+  asn_fprint(stdout, &asn_DEF_MasterInformationBlock, &req); 
+  return LIBLTE_SUCCESS;
+}
+
+int bcch_dlsch_sib1_unpack(uint8_t *buffer, uint32_t msg_nof_bits) {
+  SystemInformationBlockType1_t *req = calloc(1, sizeof(SystemInformationBlockType1_t));
+  if (!req) {
+    perror("calloc");
+    return LIBLTE_ERROR; 
+  }
+  asn_dec_rval_t n = uper_decode(NULL, &asn_DEF_SystemInformationBlockType1, 
+                                 (void**) &req, buffer, msg_nof_bits/8,0,msg_nof_bits%8);
+  if (n.consumed == -1) {
+    printf("Decoding failed.\n");
+    return LIBLTE_ERROR;
+  } else {
+    printf("Decoding OK consumed: %d bits\n", n.consumed);
+  }
+  asn_fprint(stdout, &asn_DEF_SystemInformationBlockType1, req); 
+
+  return LIBLTE_SUCCESS;
+}

lte/rrc/lib/rrc_msg/test/CMakeLists.txt

@@ -24,6 +24,11 @@
 ########################################################################
 
 ADD_EXECUTABLE(bcch_bch_test bcch_bch_test.c)
-TARGET_LINK_LIBRARIES(bcch_bch_test lte_rrc)
+TARGET_LINK_LIBRARIES(bcch_bch_test lte_rrc rrc_asn )
 
 ADD_TEST(bcch_bch_test_1 bcch_bch_test) 
+
+ADD_EXECUTABLE(bcch_dlsch_test bcch_dlsch_test.c)
+TARGET_LINK_LIBRARIES(bcch_dlsch_test lte_rrc rrc_asn )
+
+ADD_TEST(bcch_dlsch_test_1 bcch_dlsch_test) 

lte/rrc/lib/rrc_msg/test/bcch_bch_test.c

@@ -48,3 +48,4 @@ int main(int argc, char **argv) {
   cell.phich_resources = 1;
   bcch_bch_mib_pack(&cell, 123, buffer, 1024);
 }
+