reworking of MAC functions to schedule SSBs, including VRB map occupation and...

reworking of MAC functions to schedule SSBs, including VRB map occupation and get_type0_PDCCH_CSS_config_parameters

openair1/PHY/NR_TRANSPORT/nr_dci.c

@@ -30,7 +30,7 @@
 * \warning
 */
 
-#include <LAYER2/NR_MAC_gNB/nr_mac_gNB.h>
+
 #include "nr_dci.h"
 #include "nr_dlsch.h"
 #include "nr_sch_dmrs.h"
@@ -87,7 +87,8 @@ void nr_generate_dci(PHY_VARS_gNB *gNB,
   get_coreset_rballoc(pdcch_pdu_rel15->FreqDomainResource,&n_rb,&rb_offset);
   cset_start_sc = frame_parms.first_carrier_offset + rb_offset*NR_NB_SC_PER_RB;
   if (pdcch_pdu_rel15->CoreSetType == NFAPI_NR_CSET_CONFIG_MIB_SIB1) {
-    cset_start_sc = cset_start_sc + RC.nrmac[gNB->Mod_id]->type0_PDCCH_CSS_config.cset_start_rb*NR_NB_SC_PER_RB;
+    // TODO fix this using fapi structures
+    //cset_start_sc = cset_start_sc + RC.nrmac[gNB->Mod_id]->type0_PDCCH_CSS_config.cset_start_rb*NR_NB_SC_PER_RB;
   }
 
   for (int d=0;d<pdcch_pdu_rel15->numDlDci;d++) {

openair2/LAYER2/NR_MAC_COMMON/nr_mac.h

@@ -418,14 +418,6 @@ typedef enum {
   NR_RNTI_MCS_C,
 } nr_rnti_type_t;
 
-typedef enum subcarrier_spacing_e {
-  scs_15kHz  = 0x1,
-  scs_30kHz  = 0x2,
-  scs_60kHz  = 0x4,
-  scs_120kHz = 0x8,
-  scs_240kHz = 0x16
-} subcarrier_spacing_t;
-
 typedef enum channel_bandwidth_e {
   bw_5MHz   = 0x1,
   bw_10MHz  = 0x2,

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c

@@ -3117,49 +3117,36 @@ uint32_t get_ssb_slot(uint32_t ssb_index){
   //  return first_symbol(case, freq, ssb_index) / 14
 }
 
-int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDCCH_CSS_config,
+void get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDCCH_CSS_config,
+                                           frame_t frameP,
                                            NR_MIB_t *mib,
-                                          uint8_t extra_bits,
-                                          uint32_t ssb_length,
+                                           uint8_t num_slot_per_frame,
+                                           uint8_t ssb_subcarrier_offset,
+                                           NR_SubcarrierSpacing_t scs_ssb,
+                                           frequency_range_t frequency_range,
                                            uint32_t ssb_index,
                                            uint32_t ssb_offset_point_a) {
 
-  //  deafult for testing
-  subcarrier_spacing_t scs_ssb = scs_30kHz;
-  channel_bandwidth_t min_channel_bw = bw_10MHz;
-  frequency_range_t frequency_range = FR1;
-  const uint32_t num_slot_per_frame = 20;
+  NR_SubcarrierSpacing_t scs_pdcch;
 
-  type0_PDCCH_CSS_config->ssb_length = ssb_length;
-  type0_PDCCH_CSS_config->ssb_index = ssb_index;
-  type0_PDCCH_CSS_config->frame = (mib->systemFrameNumber.buf[0] >> mib->systemFrameNumber.bits_unused);
-
-  uint16_t frame_number_4lsb = 0;
-  for (int i=0; i<4; i++) {
-    frame_number_4lsb |= ((extra_bits>>i)&1)<<(3-i);
-  }
+  channel_bandwidth_t min_channel_bw = bw_10MHz; // TODO remove hardcoding and implement Table 5.3.5-1 in 38.104
 
-  uint8_t ssb_subcarrier_offset_msb = ( extra_bits >> 5 ) & 0x1;    //	extra bits[5]
-  uint8_t ssb_subcarrier_offset = (uint8_t)mib->ssb_SubcarrierOffset;
-
-  type0_PDCCH_CSS_config->frame = type0_PDCCH_CSS_config->frame << 4;
-  type0_PDCCH_CSS_config->frame = type0_PDCCH_CSS_config->frame | frame_number_4lsb;
-
-  if(type0_PDCCH_CSS_config->ssb_length == 64){
-    type0_PDCCH_CSS_config->ssb_index = type0_PDCCH_CSS_config->ssb_index & (( extra_bits >> 2 ) & 0x1C );    //	{ extra_bits[5:7], ssb_index[2:0] }
-  }else{
-    if(ssb_subcarrier_offset_msb){
-      ssb_subcarrier_offset = ssb_subcarrier_offset | 0x10;
+  if (frequency_range == FR2) {
+    if(mib->subCarrierSpacingCommon == NR_MIB__subCarrierSpacingCommon_scs15or60)
+      scs_pdcch = NR_SubcarrierSpacing_kHz60;
+    else
+      scs_pdcch = NR_SubcarrierSpacing_kHz120;
   }
+  else {
+    frequency_range = FR1;
+    if(mib->subCarrierSpacingCommon == NR_MIB__subCarrierSpacingCommon_scs15or60)
+      scs_pdcch = NR_SubcarrierSpacing_kHz15;
+    else
+      scs_pdcch = NR_SubcarrierSpacing_kHz30;
   }
 
-  //  assume carrier frequency < 6GHz
-  subcarrier_spacing_t scs_pdcch;
-  if(mib->subCarrierSpacingCommon == NR_MIB__subCarrierSpacingCommon_scs15or60){
-    scs_pdcch = scs_15kHz;
-  }else{  //NR_MIB__subCarrierSpacingCommon_scs30or120
-    scs_pdcch = scs_30kHz;
-  }
+  type0_PDCCH_CSS_config->ssb_index = ssb_index;
+  type0_PDCCH_CSS_config->frame = frameP;
 
   uint32_t is_condition_A = (ssb_subcarrier_offset == 0);   //  38.213 ch.13
   uint32_t index_4msb = (mib->pdcch_ConfigSIB1.controlResourceSetZero);
@@ -3170,8 +3157,8 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
   type0_PDCCH_CSS_config->rb_offset = -1;
 
   //  type0-pdcch coreset
-  switch( (scs_ssb << 5) | scs_pdcch ){
-    case (scs_15kHz << 5) | scs_15kHz :
+  switch( (scs_ssb << 3) | scs_pdcch ){
+    case (NR_SubcarrierSpacing_kHz15 << 5) | NR_SubcarrierSpacing_kHz15:
       AssertFatal(index_4msb < 15, "38.213 Table 13-1 4 MSB out of range\n");
       type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
       type0_PDCCH_CSS_config->num_rbs     = table_38213_13_1_c2[index_4msb];
@@ -3179,7 +3166,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       type0_PDCCH_CSS_config->rb_offset   = table_38213_13_1_c4[index_4msb];
       break;
 
-    case (scs_15kHz << 5) | scs_30kHz:
+    case (NR_SubcarrierSpacing_kHz15 << 3) | NR_SubcarrierSpacing_kHz30:
       AssertFatal(index_4msb < 14, "38.213 Table 13-2 4 MSB out of range\n");
       type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
       type0_PDCCH_CSS_config->num_rbs     = table_38213_13_2_c2[index_4msb];
@@ -3187,7 +3174,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       type0_PDCCH_CSS_config->rb_offset   = table_38213_13_2_c4[index_4msb];
       break;
 
-    case (scs_30kHz << 5) | scs_15kHz:
+    case (NR_SubcarrierSpacing_kHz30 << 3) | NR_SubcarrierSpacing_kHz15:
       if((min_channel_bw & bw_5MHz) | (min_channel_bw & bw_10MHz)){
         AssertFatal(index_4msb < 9, "38.213 Table 13-3 4 MSB out of range\n");
         type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
@@ -3204,7 +3191,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
 
       break;
 
-    case (scs_30kHz << 5) | scs_30kHz:
+    case (NR_SubcarrierSpacing_kHz30 << 3) | NR_SubcarrierSpacing_kHz30:
       if((min_channel_bw & bw_5MHz) | (min_channel_bw & bw_10MHz)){
         type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
         type0_PDCCH_CSS_config->num_rbs     = table_38213_13_4_c2[index_4msb];
@@ -3220,7 +3207,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       }else{ ; }
       break;
 
-    case (scs_120kHz << 5) | scs_60kHz:
+    case (NR_SubcarrierSpacing_kHz120 << 3) | NR_SubcarrierSpacing_kHz60:
       AssertFatal(index_4msb < 12, "38.213 Table 13-7 4 MSB out of range\n");
       if(index_4msb & 0x7){
         type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
@@ -3237,7 +3224,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       }
       break;
 
-    case (scs_120kHz << 5) | scs_120kHz:
+    case (NR_SubcarrierSpacing_kHz120 << 3) | NR_SubcarrierSpacing_kHz120:
       AssertFatal(index_4msb < 8, "38.213 Table 13-8 4 MSB out of range\n");
       if(index_4msb & 0x3){
         type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
@@ -3254,7 +3241,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       }
       break;
 
-    case (scs_240kHz << 5) | scs_60kHz:
+    case (NR_SubcarrierSpacing_kHz240 << 3) | NR_SubcarrierSpacing_kHz60:
       AssertFatal(index_4msb < 4, "38.213 Table 13-9 4 MSB out of range\n");
       type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
       type0_PDCCH_CSS_config->num_rbs     = table_38213_13_9_c2[index_4msb];
@@ -3262,7 +3249,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
       type0_PDCCH_CSS_config->rb_offset   = table_38213_13_9_c4[index_4msb];
       break;
 
-    case (scs_240kHz << 5) | scs_120kHz:
+    case (NR_SubcarrierSpacing_kHz240 << 3) | NR_SubcarrierSpacing_kHz120:
       AssertFatal(index_4msb < 8, "38.213 Table 13-10 4 MSB out of range\n");
       if(index_4msb & 0x3){
         type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern = 1;
@@ -3333,7 +3320,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
     type0_PDCCH_CSS_config->number_of_search_space_per_slot = table_38213_13_11_c2[index_4lsb];
     big_m = table_38213_13_11_c3[index_4lsb];
 
-    uint32_t temp = (uint32_t)(big_o*scs_pdcch) + (uint32_t)(type0_PDCCH_CSS_config->ssb_index*big_m);
+    uint32_t temp = (uint32_t)(big_o*(1<<scs_pdcch)) + (uint32_t)(type0_PDCCH_CSS_config->ssb_index*big_m);
     type0_PDCCH_CSS_config->n_c = temp / num_slot_per_frame;
     if((temp/num_slot_per_frame) & 0x1){
       type0_PDCCH_CSS_config->sfn_c = SFN_C_MOD_2_EQ_1;
@@ -3369,7 +3356,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
   /// MUX PATTERN 2
   if(type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern == 2){
 
-    if((scs_ssb == scs_120kHz) && (scs_pdcch == scs_60kHz)){
+    if((scs_ssb == NR_SubcarrierSpacing_kHz120) && (scs_pdcch == NR_SubcarrierSpacing_kHz60)){
       //  38.213 Table 13-13
       AssertFatal(index_4lsb == 0, "38.213 Table 13-13 4 LSB out of range\n");
       //  PDCCH monitoring occasions (SFN and slot number) same as SSB frame-slot
@@ -3391,7 +3378,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
         default: break;
       }
 
-    }else if((scs_ssb == scs_240kHz) && (scs_pdcch == scs_120kHz)){
+    }else if((scs_ssb == NR_SubcarrierSpacing_kHz240) && (scs_pdcch == NR_SubcarrierSpacing_kHz120)){
       //  38.213 Table 13-14
       AssertFatal(index_4lsb == 0, "38.213 Table 13-14 4 LSB out of range\n");
       //  PDCCH monitoring occasions (SFN and slot number) same as SSB frame-slot
@@ -3433,7 +3420,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
 
   /// MUX PATTERN 3
   if(type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern == 3){
-    if((scs_ssb == scs_120kHz) && (scs_pdcch == scs_120kHz)){
+    if((scs_ssb == NR_SubcarrierSpacing_kHz120) && (scs_pdcch == NR_SubcarrierSpacing_kHz120)){
       //  38.213 Table 13-15
       AssertFatal(index_4lsb == 0, "38.213 Table 13-15 4 LSB out of range\n");
       //  PDCCH monitoring occasions (SFN and slot number) same as SSB frame-slot
@@ -3475,8 +3462,7 @@ int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDC
   AssertFatal(type0_PDCCH_CSS_config->sfn_c!=SFN_C_IMPOSSIBLE,"");
   AssertFatal(type0_PDCCH_CSS_config->n_c!=UINT_MAX,"");
 
-  type0_PDCCH_CSS_config->n_0 = ((uint32_t)(big_o*scs_pdcch) + (uint32_t)(type0_PDCCH_CSS_config->ssb_index*big_m))%num_slot_per_frame;
+  type0_PDCCH_CSS_config->n_0 = ((uint32_t)(big_o*(1<<scs_pdcch)) + (uint32_t)(type0_PDCCH_CSS_config->ssb_index*big_m))%num_slot_per_frame;
   type0_PDCCH_CSS_config->cset_start_rb = ssb_offset_point_a - type0_PDCCH_CSS_config->rb_offset;
 
-  return 0;
 }

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h

@@ -126,10 +126,13 @@ int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmr
 uint8_t get_L_ptrs(uint8_t mcs1, uint8_t mcs2, uint8_t mcs3, uint8_t I_mcs, uint8_t mcs_table);
 uint8_t get_K_ptrs(uint16_t nrb0, uint16_t nrb1, uint16_t N_RB);
 
-int get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDCCH_CSS_config,
+void get_type0_PDCCH_CSS_config_parameters(NR_Type0_PDCCH_CSS_config_t *type0_PDCCH_CSS_config,
+                                           frame_t frameP,
                                            NR_MIB_t *mib,
-                                          uint8_t extra_bits,
-                                          uint32_t ssb_length,
+                                           uint8_t num_slot_per_frame,
+                                           uint8_t ssb_subcarrier_offset,
+                                           NR_SubcarrierSpacing_t scs_ssb,
+                                           frequency_range_t frequency_range,
                                            uint32_t ssb_index,
                                            uint32_t ssb_offset_point_a);
 

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

@@ -104,7 +104,7 @@ int8_t nr_ue_decode_mib(module_id_t module_id,
   LOG_I(MAC,"[L2][MAC] decode mib\n");
 
   NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);
-
+  frequency_range_t frequency_range;
   nr_mac_rrc_data_ind_ue( module_id, cc_id, gNB_index, NR_BCCH_BCH, (uint8_t *) pduP, 3 );    //  fixed 3 bytes MIB PDU
     
   AssertFatal(mac->mib != NULL, "nr_ue_decode_mib() mac->mib == NULL\n");
@@ -120,9 +120,11 @@ int8_t nr_ue_decode_mib(module_id_t module_id,
   frame = frame << 4;
   frame = frame | frame_number_4lsb;
   if(ssb_length == 64){
+    frequency_range = FR2;
     for (int i=0; i<3; i++)
       ssb_index += (((extra_bits>>(7-i))&0x01)<<(3+i));
   }else{
+    frequency_range = FR1;
     if(ssb_subcarrier_offset_msb){
       ssb_subcarrier_offset = ssb_subcarrier_offset | 0x10;
     }
@@ -141,10 +143,19 @@ int8_t nr_ue_decode_mib(module_id_t module_id,
   //storing ssb index in the mac structure
   mac->mib_ssb = ssb_index;
 
-  get_type0_PDCCH_CSS_config_parameters(&mac->type0_PDCCH_CSS_config, mac->mib, extra_bits, ssb_length, ssb_index,
+  // TODO fix this (it shouldn't be taken from config)
+  uint8_t scs_ssb = mac->phy_config.config_req.ssb_config.scs_common;
+
+  get_type0_PDCCH_CSS_config_parameters(&mac->type0_PDCCH_CSS_config,
+                                        frame,
+                                        mac->mib,
+                                        nr_slots_per_frame[scs_ssb],
+                                        ssb_subcarrier_offset,
+                                        scs_ssb,
+                                        frequency_range,
+                                        ssb_index,
                                         mac->phy_config.config_req.ssb_table.ssb_offset_point_a);
 
-  ssb_index = mac->type0_PDCCH_CSS_config.ssb_index; //  TODO: ssb_index should obtain from L1 in case Lssb != 64
   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;

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -54,7 +54,7 @@ extern RAN_CONTEXT_t RC;
 extern void mac_top_init_gNB(void);
 extern uint8_t nfapi_mode;
 
-void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigCommon_t *scc) {
+void config_common(int Mod_idP, int ssb_SubcarrierOffset, int pdsch_AntennaPorts, NR_ServingCellConfigCommon_t *scc) {
 
   nfapi_nr_config_request_scf_t *cfg = &RC.nrmac[Mod_idP]->config[0];
   RC.nrmac[Mod_idP]->common_channels[0].ServingCellConfigCommon = scc;
@@ -241,6 +241,9 @@ void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigComm
   cfg->ssb_table.ssb_period.value = *scc->ssb_periodicityServingCell;
   cfg->ssb_table.ssb_period.tl.tag = NFAPI_NR_CONFIG_SSB_PERIOD_TAG;
   cfg->num_tlv++;
+  cfg->ssb_table.ssb_subcarrier_offset.value = ssb_SubcarrierOffset;
+  cfg->ssb_table.ssb_subcarrier_offset.tl.tag = NFAPI_NR_CONFIG_SSB_SUBCARRIER_OFFSET_TAG;
+  cfg->num_tlv++;
 
   switch (scc->ssb_PositionsInBurst->present) {
     case 1 :
@@ -362,6 +365,7 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
     LOG_I(MAC,"Configuring common parameters from NR ServingCellConfig\n");
 
     config_common(Mod_idP,
+                  ssb_SubcarrierOffset,
                   pdsch_AntennaPorts, 
 		  scc);
     LOG_E(MAC, "%s() %s:%d RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req:%p\n", __FUNCTION__, __FILE__, __LINE__, RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req);
@@ -375,6 +379,7 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
       }
     }
 
+    RC.nrmac[Mod_idP]->ssb_SubcarrierOffset = ssb_SubcarrierOffset;
     RC.nrmac[Mod_idP]->pusch_target_snrx10 = pusch_tgt_snrx10;
     RC.nrmac[Mod_idP]->pucch_target_snrx10 = pucch_tgt_snrx10;
     NR_PHY_Config_t phycfg;
@@ -382,10 +387,6 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
     phycfg.CC_id  = 0;
     phycfg.cfg    = &RC.nrmac[Mod_idP]->config[0];
 
-    phycfg.cfg->ssb_table.ssb_subcarrier_offset.value = ssb_SubcarrierOffset;
-    phycfg.cfg->ssb_table.ssb_subcarrier_offset.tl.tag = NFAPI_NR_CONFIG_SSB_SUBCARRIER_OFFSET_TAG;
-    phycfg.cfg->num_tlv++;
-
     if (RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req) RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req(&phycfg);
 
     find_SSB_and_RO_available(Mod_idP);

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -41,6 +41,7 @@ void set_cset_offset(uint16_t);
 void mac_top_init_gNB(void);
 
 void config_common(int Mod_idP,
+                   int ssb_SubcarrierOffset,
                    int pdsch_AntennaPorts,
 		   NR_ServingCellConfigCommon_t *scc
 		   );
@@ -70,6 +71,7 @@ void nr_schedule_ue_spec(module_id_t module_id,
 
 void schedule_control_sib1(module_id_t module_id,
                            int CC_id,
+                           NR_Type0_PDCCH_CSS_config_t *type0_PDCCH_CSS_config,
                            int time_domain_allocation,
                            uint8_t mcsTableIdx,
                            uint8_t mcs,
@@ -360,7 +362,7 @@ int binomial(int n, int k);
 
 bool is_xlsch_in_slot(uint64_t bitmap, sub_frame_t slot);
 
-void fill_ssb_vrb_map (NR_COMMON_channels_t *cc, int rbStart, int CC_id);
+void fill_ssb_vrb_map (NR_COMMON_channels_t *cc, int rbStart, uint16_t symStart, int CC_id);
 
 
 /* \brief Function to indicate a received SDU on ULSCH.

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -536,6 +536,8 @@ typedef struct gNB_MAC_INST_s {
   int                             pusch_target_snrx10;
   /// Pucch target SNR
   int                             pucch_target_snrx10;
+  /// Subcarrier Offset
+  int                             ssb_SubcarrierOffset;
   /// Common cell resources
   NR_COMMON_channels_t common_channels[NFAPI_CC_MAX];
   /// current PDU index (BCH,DLSCH)
@@ -601,7 +603,8 @@ typedef struct gNB_MAC_INST_s {
 
   NR_UE_sched_ctrl_t *sched_ctrlCommon;
   NR_CellGroupConfig_t *secondaryCellGroupCommon;
-  NR_Type0_PDCCH_CSS_config_t type0_PDCCH_CSS_config;
+  NR_Type0_PDCCH_CSS_config_t type0_PDCCH_CSS_config[3];
+  uint8_t num_css_config;
 
 } gNB_MAC_INST;