rlc,rrc,nr: remove rb_type from rlc_um_config

Signed-off-by: Carlo Galiotto <carlo@srs.io>

lib/include/srsran/asn1/rrc_nr_utils.h

@@ -134,10 +134,7 @@ bool                     make_mac_dl_harq_cfg_nr_t(const asn1::rrc_nr::pdsch_ser
 /***************************
  *      RLC Config
  **************************/
-int make_rlc_config_t(const asn1::rrc_nr::rlc_cfg_c& asn1_type,
-                      uint8_t                        bearer_id,
-                      rlc_rb_type_t                  rb_type,
-                      rlc_config_t*                  rlc_config_out);
+int make_rlc_config_t(const asn1::rrc_nr::rlc_cfg_c& asn1_type, uint8_t bearer_id, rlc_config_t* rlc_config_out);
 
 /***************************
  *      PDCP Config

lib/include/srsran/interfaces/rlc_interface_types.h

@@ -70,8 +70,6 @@ inline uint16_t to_number(const rlc_am_nr_sn_size_t& sn_size)
   return enum_to_number(options, (uint32_t)rlc_mode_t::nulltype, (uint32_t)sn_size);
 }
 
-typedef enum { RLC_RB_IS_SRB, RLC_RB_IS_DRB } rlc_rb_type_t;
-
 struct rlc_am_config_t {
   /****************************************************************************
    * Configurable parameters
@@ -114,7 +112,6 @@ struct rlc_um_nr_config_t {
   rlc_um_nr_sn_size_t sn_field_length; // Number of bits used for sequence number
   int32_t             t_reassembly_ms; // Timer used by rx to detect PDU loss (ms)
   uint8_t             bearer_id;       // This is not in the 3GPP TS 38.322
-  rlc_rb_type_t       rb_type;         // This is not in the 3GPP TS 38.322
 };
 
 #define RLC_TX_QUEUE_LEN (256)

lib/src/asn1/rrc_nr_utils.cc

@@ -101,7 +101,7 @@ rach_nr_cfg_t make_mac_rach_cfg(const rach_cfg_common_s& asn1_type)
   return rach_nr_cfg;
 };
 
-int make_rlc_config_t(const rlc_cfg_c& asn1_type, uint8_t bearer_id, rlc_rb_type_t rb_type, rlc_config_t* cfg_out)
+int make_rlc_config_t(const rlc_cfg_c& asn1_type, uint8_t bearer_id, rlc_config_t* cfg_out)
 {
   rlc_config_t rlc_cfg = rlc_config_t::default_rlc_um_nr_config();
   rlc_cfg.rat          = srsran_rat_t::nr;
@@ -113,7 +113,6 @@ int make_rlc_config_t(const rlc_cfg_c& asn1_type, uint8_t bearer_id, rlc_rb_type
       rlc_cfg.rlc_mode              = rlc_mode_t::um;
       rlc_cfg.um_nr.t_reassembly_ms = asn1_type.um_bi_dir().dl_um_rlc.t_reassembly.to_number();
       rlc_cfg.um_nr.bearer_id       = bearer_id;
-      rlc_cfg.um_nr.rb_type         = rb_type;
       if (asn1_type.um_bi_dir().dl_um_rlc.sn_field_len_present &&
           asn1_type.um_bi_dir().ul_um_rlc.sn_field_len_present &&
           asn1_type.um_bi_dir().dl_um_rlc.sn_field_len != asn1_type.um_bi_dir().ul_um_rlc.sn_field_len) {

lib/src/rlc/rlc_um_nr.cc

@@ -67,12 +67,7 @@ bool rlc_um_nr::configure(const rlc_config_t& cnfg_)
 std::string rlc_um_nr::get_rb_name() const
 {
   fmt::memory_buffer fmtbuf;
-  // currently we only support DRB 1 (hardcoded)
-  if (cfg.um_nr.bearer_id == 1) {
-    fmt::format_to(fmtbuf, "{}{}", cfg.um_nr.rb_type == RLC_RB_IS_SRB ? "SRB" : "DRB", cfg.um_nr.bearer_id);
-  } else {
-    fmt::format_to(fmtbuf, "DRB N/A");
-  }
+  fmt::format_to(fmtbuf, "DRB{}", cfg.um_nr.bearer_id);
   return fmt::to_string(fmtbuf);
 }
 

lib/test/asn1/rrc_nr_utils_test.cc

@@ -36,7 +36,7 @@ int test_rlc_config()
 
   rlc_config_t rlc_cfg;
   // We hard-code the bearer_id=1 and rb_type=DRB
-  TESTASSERT(make_rlc_config_t(rlc_cfg_asn1, /* bearer_id */ 1, /*rb_type*/ RLC_RB_IS_DRB, &rlc_cfg) == SRSRAN_SUCCESS);
+  TESTASSERT(make_rlc_config_t(rlc_cfg_asn1, /* bearer_id */ 1, &rlc_cfg) == SRSRAN_SUCCESS);
   TESTASSERT(rlc_cfg.rat == srsran_rat_t::nr);
   TESTASSERT(rlc_cfg.um_nr.sn_field_length == rlc_um_nr_sn_size_t::size12bits);
   return SRSRAN_SUCCESS;

srsenb/src/stack/rrc/rrc_nr.cc

@@ -1405,7 +1405,6 @@ int rrc_nr::ue::add_drb()
   /// NOTE, we need to pass the radio-bearer to the rlc_config
   if (srsran::make_rlc_config_t(cell_group_cfg.rlc_bearer_to_add_mod_list[0].rlc_cfg,
                                 rlc_bearer.served_radio_bearer.drb_id(),
-                                srsran::RLC_RB_IS_DRB,
                                 &rlc_cfg) != SRSRAN_SUCCESS) {
     parent->logger.error("Failed to build RLC config");
     return SRSRAN_ERROR;

srsue/src/stack/rrc/rrc_nr.cc

@@ -457,15 +457,15 @@ bool rrc_nr::apply_rlc_add_mod(const rlc_bearer_cfg_s& rlc_bearer_cfg)
   uint32_t     drb_id   = 0;
   uint32_t     srb_id   = 0;
   rlc_config_t rlc_cfg;
-  // We change this to RLC_RB_IS_DRB if below we detect it's a DRB
-  rlc_rb_type_t rb_type = RLC_RB_IS_SRB;
+  // We set this to true if below we detect it's a DRB
+  bool isDRB = false;
 
   lc_ch_id = rlc_bearer_cfg.lc_ch_id;
   if (rlc_bearer_cfg.served_radio_bearer_present == true) {
     if (rlc_bearer_cfg.served_radio_bearer.type() == rlc_bearer_cfg_s::served_radio_bearer_c_::types::drb_id) {
       drb_id = rlc_bearer_cfg.served_radio_bearer.drb_id();
       add_lcid_drb(lc_ch_id, drb_id);
-      rb_type = RLC_RB_IS_DRB;
+      isDRB = true;
     }
   } else {
     logger.error("In RLC bearer cfg does not contain served radio bearer");
@@ -473,8 +473,8 @@ bool rrc_nr::apply_rlc_add_mod(const rlc_bearer_cfg_s& rlc_bearer_cfg)
   }
 
   if (rlc_bearer_cfg.rlc_cfg_present == true) {
-    uint8_t bearer_id = static_cast<uint8_t>(rb_type == RLC_RB_IS_SRB ? srb_id : drb_id);
-    if (srsran::make_rlc_config_t(rlc_bearer_cfg.rlc_cfg, bearer_id, rb_type, &rlc_cfg) != SRSRAN_SUCCESS) {
+    uint8_t bearer_id = static_cast<uint8_t>(isDRB ? drb_id : srb_id);
+    if (srsran::make_rlc_config_t(rlc_bearer_cfg.rlc_cfg, bearer_id, &rlc_cfg) != SRSRAN_SUCCESS) {
       logger.error("Failed to build RLC config");
       return false;
     }