function to schedule reception of sib1

openair2/LAYER2/NR_MAC_UE/mac_defs.h

@@ -353,6 +353,9 @@ typedef struct {
   /// SSB index from MIB decoding
   uint8_t mib_ssb;
 
+  /// Flag for SIB1
+  uint8_t sib1_received;
+
   /// Last NDI of UL HARQ processes
   uint8_t UL_ndi[NR_MAX_HARQ_PROCESSES];
 

openair2/LAYER2/NR_MAC_UE/mac_proto.h

@@ -231,6 +231,14 @@ void nr_ue_msg3_scheduler(NR_UE_MAC_INST_t *mac,
                           sub_frame_t current_slot,
                           uint8_t Msg3_tda_id);
 
+void nr_ue_sib1_scheduler(module_id_t module_idP,
+                          uint16_t ssb_start_symbol,
+                          uint16_t frame,
+                          uint8_t ssb_subcarrier_offset,
+                          uint32_t ssb_index,
+                          uint16_t ssb_start_subcarrier,
+                          frequency_range_t frequency_range);
+
 /* \brief Function called by PHY to process the received RAR and check that the preamble matches what was sent by the gNB. It provides the timing advance and t-CRNTI.
 @param Mod_id Index of UE instance
 @param CC_id Index to a component carrier

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

@@ -148,27 +148,19 @@ int8_t nr_ue_decode_mib(module_id_t module_id,
   uint32_t band;
   uint16_t ssb_start_symbol;
 
-  if (get_softmodem_params()->sa == 1) {
+  if ((get_softmodem_params()->sa == 1) && (mac->sib1_received == 0)) {
     scs_ssb = get_softmodem_params()->numerology;
     band = mac->nr_band;
     ssb_start_symbol = get_ssb_start_symbol(band,scs_ssb,ssb_index);
-    uint16_t ssb_offset_point_a = (ssb_start_subcarrier - ssb_subcarrier_offset)/12;
-
-    get_type0_PDCCH_CSS_config_parameters(&mac->type0_PDCCH_CSS_config,
-                                          frame,
-                                          mac->mib,
-                                          nr_slots_per_frame[scs_ssb],
-                                          ssb_subcarrier_offset,
-                                          ssb_start_symbol,
-                                          scs_ssb,
-                                          frequency_range,
-                                          ssb_index,
-                                          ssb_offset_point_a);
-
-
-    mac->type0_pdcch_ss_mux_pattern = mac->type0_PDCCH_CSS_config.type0_pdcch_ss_mux_pattern;
-    mac->type0_pdcch_ss_sfn_c = mac->type0_PDCCH_CSS_config.sfn_c;
-    mac->type0_pdcch_ss_n_c = mac->type0_PDCCH_CSS_config.n_c;
+
+    nr_ue_sib1_scheduler(module_id,
+                         ssb_start_symbol,
+                         frame,
+                         ssb_subcarrier_offset,
+                         ssb_index,
+                         ssb_start_subcarrier,
+                         frequency_range);
+
   }
   else {
     NR_ServingCellConfigCommon_t *scc = mac->scc;

openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c

@@ -1439,7 +1439,9 @@ static void map_ssb_to_ro(NR_ServingCellConfigCommon_t *scc) {
                     ssb_list.tx_ssb[ssb_idx].nb_mapped_ro++;
                     AssertFatal(MAX_NB_RO_PER_SSB_IN_ASSOCIATION_PATTERN > ssb_list.tx_ssb[ssb_idx].nb_mapped_ro,"Too many mapped ROs (%d) to a single SSB\n", ssb_list.tx_ssb[ssb_idx].nb_mapped_ro);
 
-                    LOG_D(MAC,"Mapped ssb_idx %u to RO slot-symbol %u-%u, %u-%u-%u/%u\n", ssb_idx, ro_p->slot, ro_p->start_symbol, slot, ro_in_time, ro_in_freq, prach_conf_period_p->prach_occasion_slot_map[frame][slot].nb_of_prach_occasion_in_freq);
+                    LOG_D(MAC,"Mapped ssb_idx %u to RO slot-symbol %u-%u, %u-%u-%u/%u\n",
+                          ssb_idx, ro_p->slot, ro_p->start_symbol, slot, ro_in_time, ro_in_freq,
+                          prach_conf_period_p->prach_occasion_slot_map[frame][slot].nb_of_prach_occasion_in_freq);
                     LOG_D(MAC,"Nb mapped ROs for this ssb idx: in the association period only %u\n", ssb_list.tx_ssb[ssb_idx].nb_mapped_ro);
 
                     // If all the required SSBs are mapped to this RO, exit the loop of SSBs
@@ -1508,11 +1510,15 @@ static void map_ssb_to_ro(NR_ServingCellConfigCommon_t *scc) {
                     ro_p->nb_mapped_ssb = 1;
                     ssb_list.tx_ssb[ssb_idx].mapped_ro[ssb_list.tx_ssb[ssb_idx].nb_mapped_ro] = ro_p;
                     ssb_list.tx_ssb[ssb_idx].nb_mapped_ro++;
-                    AssertFatal(MAX_NB_RO_PER_SSB_IN_ASSOCIATION_PATTERN > ssb_list.tx_ssb[ssb_idx].nb_mapped_ro,"Too many mapped ROs (%d) to a single SSB\n", ssb_list.tx_ssb[ssb_idx].nb_mapped_ro);
+                    AssertFatal(MAX_NB_RO_PER_SSB_IN_ASSOCIATION_PATTERN > ssb_list.tx_ssb[ssb_idx].nb_mapped_ro,"Too many mapped ROs (%d) to a single SSB\n",
+                                ssb_list.tx_ssb[ssb_idx].nb_mapped_ro);
                     nb_mapped_ro_in_association_period++;
 
-                    LOG_D(MAC,"Mapped ssb_idx %u to RO slot-symbol %u-%u, %u-%u-%u/%u\n", ssb_idx, ro_p->slot, ro_p->start_symbol, slot, ro_in_time, ro_in_freq, prach_conf_period_p->prach_occasion_slot_map[frame][slot].nb_of_prach_occasion_in_freq);
-                    LOG_D(MAC,"Nb mapped ROs for this ssb idx: in the association period only %u / total %u\n", ssb_list.tx_ssb[ssb_idx].nb_mapped_ro, nb_mapped_ro_in_association_period);
+                    LOG_D(MAC,"Mapped ssb_idx %u to RO slot-symbol %u-%u, %u-%u-%u/%u\n",
+                          ssb_idx, ro_p->slot, ro_p->start_symbol, slot, ro_in_time, ro_in_freq,
+                          prach_conf_period_p->prach_occasion_slot_map[frame][slot].nb_of_prach_occasion_in_freq);
+                    LOG_D(MAC,"Nb mapped ROs for this ssb idx: in the association period only %u / total %u\n",
+                          ssb_list.tx_ssb[ssb_idx].nb_mapped_ro, nb_mapped_ro_in_association_period);
 
                     // Exit the loop if this SSB has been mapped to all the required ROs
                     // WIP: Assuming that ssb_rach_ratio equals the maximum nb of times a given ssb_idx is mapped within an association period:
@@ -1655,6 +1661,7 @@ void build_ssb_to_ro_map(NR_ServingCellConfigCommon_t *scc, uint8_t unpaired){
   LOG_D(MAC,"Map SSB to RO done\n");
 }
 
+
 // This function schedules the PRACH according to prach_ConfigurationIndex and TS 38.211, tables 6.3.3.2.x
 // PRACH formats 9, 10, 11 are corresponding to dual PRACH format configurations A1/B1, A2/B2, A3/B3.
 // - todo:
@@ -1792,6 +1799,39 @@ void nr_ue_prach_scheduler(module_id_t module_idP, frame_t frameP, sub_frame_t s
   } // if is_nr_UL_slot
 }
 
+
+// This function schedules the reception of SIB1 after initial sync and before going to real time state
+void nr_ue_sib1_scheduler(module_id_t module_idP,
+                          uint16_t ssb_start_symbol,
+                          uint16_t frame,
+                          uint8_t ssb_subcarrier_offset,
+                          uint32_t ssb_index,
+                          uint16_t ssb_start_subcarrier,
+                          frequency_range_t frequency_range) {
+
+  NR_UE_MAC_INST_t *mac = get_mac_inst(module_idP);
+
+  uint8_t scs_ssb = get_softmodem_params()->numerology;
+  uint16_t ssb_offset_point_a = (ssb_start_subcarrier - ssb_subcarrier_offset)/12;
+
+  get_type0_PDCCH_CSS_config_parameters(&mac->type0_PDCCH_CSS_config,
+                                        frame,
+                                        mac->mib,
+                                        nr_slots_per_frame[scs_ssb],
+                                        ssb_subcarrier_offset,
+                                        ssb_start_symbol,
+                                        scs_ssb,
+                                        frequency_range,
+                                        ssb_index,
+                                        ssb_offset_point_a);
+
+    mac->type0_pdcch_ss_mux_pattern = mac->type0_PDCCH_CSS_config.type0_pdcch_ss_mux_pattern;
+    mac->type0_pdcch_ss_sfn_c = mac->type0_PDCCH_CSS_config.sfn_c;
+    mac->type0_pdcch_ss_n_c = mac->type0_PDCCH_CSS_config.n_c;
+
+}
+
+
 uint8_t
 nr_ue_get_sdu(module_id_t module_idP, int CC_id, frame_t frameP,
            sub_frame_t subframe, uint8_t eNB_index,