config.c

/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file config.c
 * \brief gNB configuration performed by RRC or as a consequence of RRC procedures
 * \author  Navid Nikaein and Raymond Knopp, WEI-TAI CHEN
 * \date 2010 - 2014, 2018
 * \version 0.1
 * \company Eurecom, NTUST
 * \email: navid.nikaein@eurecom.fr, kroempa@gmail.com
 * @ingroup _mac

 */

#include "COMMON/platform_types.h"
#include "COMMON/platform_constants.h"
#include "common/ran_context.h"

#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"

#include "NR_BCCH-BCH-Message.h"
#include "NR_ServingCellConfigCommon.h"

#include "LAYER2/NR_MAC_gNB/mac_proto.h"
#include "SCHED_NR/phy_frame_config_nr.h"

#include "NR_MIB.h"
#include "LAYER2/NR_MAC_COMMON/nr_mac_common.h"

/* Softmodem params */
#include "executables/softmodem-common.h"

extern RAN_CONTEXT_t RC;
//extern int l2_init_gNB(void);
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) {

  nfapi_nr_config_request_scf_t *cfg = &RC.nrmac[Mod_idP]->config[0];
  RC.nrmac[Mod_idP]->common_channels[0].ServingCellConfigCommon = scc;
  int i;

  // Carrier configuration

  cfg->carrier_config.dl_bandwidth.value = config_bandwidth(scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing,
                                                            scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth,
                                                            *scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0]);
  cfg->carrier_config.dl_bandwidth.tl.tag   = NFAPI_NR_CONFIG_DL_BANDWIDTH_TAG; //temporary
  cfg->num_tlv++;
  LOG_I(PHY,"%s() dl_BandwidthP:%d\n", __FUNCTION__, cfg->carrier_config.dl_bandwidth.value);

  cfg->carrier_config.dl_frequency.value = from_nrarfcn(*scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0],
                                                        *scc->ssbSubcarrierSpacing,
                                                        scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA)/1000; // freq in kHz
  cfg->carrier_config.dl_frequency.tl.tag = NFAPI_NR_CONFIG_DL_FREQUENCY_TAG;
  cfg->num_tlv++;

  for (i=0; i<5; i++) {
    if (i==scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing) {
      cfg->carrier_config.dl_grid_size[i].value = scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth;
      cfg->carrier_config.dl_k0[i].value = scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->offsetToCarrier;
      cfg->carrier_config.dl_grid_size[i].tl.tag = NFAPI_NR_CONFIG_DL_GRID_SIZE_TAG;
      cfg->carrier_config.dl_k0[i].tl.tag = NFAPI_NR_CONFIG_DL_K0_TAG;
      cfg->num_tlv++;
      cfg->num_tlv++;
    }
    else {
      cfg->carrier_config.dl_grid_size[i].value = 0;
      cfg->carrier_config.dl_k0[i].value = 0;
    }
  }

  cfg->carrier_config.uplink_bandwidth.value = config_bandwidth(scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing,
                                                                scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth,
                                                                *scc->uplinkConfigCommon->frequencyInfoUL->frequencyBandList->list.array[0]);
  cfg->carrier_config.uplink_bandwidth.tl.tag   = NFAPI_NR_CONFIG_UPLINK_BANDWIDTH_TAG; //temporary
  cfg->num_tlv++;
  LOG_I(PHY,"%s() dl_BandwidthP:%d\n", __FUNCTION__, cfg->carrier_config.uplink_bandwidth.value);

  int UL_pointA;
  if (scc->uplinkConfigCommon->frequencyInfoUL->absoluteFrequencyPointA == NULL)
    UL_pointA = scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA;
  else
    UL_pointA = *scc->uplinkConfigCommon->frequencyInfoUL->absoluteFrequencyPointA; 

  cfg->carrier_config.uplink_frequency.value = from_nrarfcn(*scc->uplinkConfigCommon->frequencyInfoUL->frequencyBandList->list.array[0],
                                                            *scc->ssbSubcarrierSpacing,
                                                            UL_pointA)/1000; // freq in kHz
  cfg->carrier_config.uplink_frequency.tl.tag = NFAPI_NR_CONFIG_UPLINK_FREQUENCY_TAG;
  cfg->num_tlv++;

  for (i=0; i<5; i++) {
    if (i==scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing) {
      cfg->carrier_config.ul_grid_size[i].value = scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth;
      cfg->carrier_config.ul_k0[i].value = scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->offsetToCarrier;
      cfg->carrier_config.ul_grid_size[i].tl.tag = NFAPI_NR_CONFIG_UL_GRID_SIZE_TAG;
      cfg->carrier_config.ul_k0[i].tl.tag = NFAPI_NR_CONFIG_UL_K0_TAG;
      cfg->num_tlv++;
      cfg->num_tlv++;
    }
    else {
      cfg->carrier_config.ul_grid_size[i].value = 0;
      cfg->carrier_config.ul_k0[i].value = 0;
    }
  }

  uint32_t band = *scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0];
  frequency_range_t frequency_range = band<100?FR1:FR2;

  lte_frame_type_t frame_type;
  get_frame_type(*scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[0], *scc->ssbSubcarrierSpacing, &frame_type);
  RC.nrmac[Mod_idP]->common_channels[0].frame_type = frame_type;

  // Cell configuration
  cfg->cell_config.phy_cell_id.value = *scc->physCellId;
  cfg->cell_config.phy_cell_id.tl.tag = NFAPI_NR_CONFIG_PHY_CELL_ID_TAG;
  cfg->num_tlv++;

  cfg->cell_config.frame_duplex_type.value = frame_type;
  cfg->cell_config.frame_duplex_type.tl.tag = NFAPI_NR_CONFIG_FRAME_DUPLEX_TYPE_TAG;
  cfg->num_tlv++;


  // SSB configuration
  cfg->ssb_config.ss_pbch_power.value = scc->ss_PBCH_BlockPower;
  cfg->ssb_config.ss_pbch_power.tl.tag = NFAPI_NR_CONFIG_SS_PBCH_POWER_TAG;
  cfg->num_tlv++;

  cfg->ssb_config.bch_payload.value = 1;
  cfg->ssb_config.bch_payload.tl.tag = NFAPI_NR_CONFIG_BCH_PAYLOAD_TAG;
  cfg->num_tlv++;

  cfg->ssb_config.scs_common.value = *scc->ssbSubcarrierSpacing;
  cfg->ssb_config.scs_common.tl.tag = NFAPI_NR_CONFIG_SCS_COMMON_TAG;
  cfg->num_tlv++;

  // PRACH configuration

  uint8_t nb_preambles = 64;
  if(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->totalNumberOfRA_Preambles != NULL)
     nb_preambles = *scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->totalNumberOfRA_Preambles;

  cfg->prach_config.prach_sequence_length.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.present-1;
  cfg->prach_config.prach_sequence_length.tl.tag = NFAPI_NR_CONFIG_PRACH_SEQUENCE_LENGTH_TAG;
  cfg->num_tlv++;  

  if (scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing)
    cfg->prach_config.prach_sub_c_spacing.value = *scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing;
  else 
    cfg->prach_config.prach_sub_c_spacing.value = scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
  cfg->prach_config.prach_sub_c_spacing.tl.tag = NFAPI_NR_CONFIG_PRACH_SUB_C_SPACING_TAG;
  cfg->num_tlv++;
  cfg->prach_config.restricted_set_config.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->restrictedSetConfig;
  cfg->prach_config.restricted_set_config.tl.tag = NFAPI_NR_CONFIG_RESTRICTED_SET_CONFIG_TAG;
  cfg->num_tlv++;
  cfg->prach_config.prach_ConfigurationIndex.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.prach_ConfigurationIndex;
  cfg->prach_config.prach_ConfigurationIndex.tl.tag = NFAPI_NR_CONFIG_PRACH_CONFIG_INDEX_TAG;
  cfg->num_tlv++;

  switch (scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FDM) {
    case 0 :
      cfg->prach_config.num_prach_fd_occasions.value = 1;
      break;
    case 1 :
      cfg->prach_config.num_prach_fd_occasions.value = 2;
      break;
    case 2 :
      cfg->prach_config.num_prach_fd_occasions.value = 4;
      break;
    case 3 :
      cfg->prach_config.num_prach_fd_occasions.value = 8;
      break;
    default:
      AssertFatal(1==0,"msg1 FDM identifier %ld undefined (0,1,2,3) \n", scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FDM);
  } 
  cfg->prach_config.num_prach_fd_occasions.tl.tag = NFAPI_NR_CONFIG_NUM_PRACH_FD_OCCASIONS_TAG;
  cfg->num_tlv++;

  cfg->prach_config.prach_ConfigurationIndex.value =  scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.prach_ConfigurationIndex;
  cfg->prach_config.prach_ConfigurationIndex.tl.tag = NFAPI_NR_CONFIG_PRACH_CONFIG_INDEX_TAG;
  cfg->num_tlv++;

  cfg->prach_config.num_prach_fd_occasions_list = (nfapi_nr_num_prach_fd_occasions_t *) malloc(cfg->prach_config.num_prach_fd_occasions.value*sizeof(nfapi_nr_num_prach_fd_occasions_t));
  for (i=0; i<cfg->prach_config.num_prach_fd_occasions.value; i++) {
//    cfg->prach_config.num_prach_fd_occasions_list[i].num_prach_fd_occasions = i;
    if (cfg->prach_config.prach_sequence_length.value)
      cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l139; 
    else
      cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l839;
    cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index.tl.tag = NFAPI_NR_CONFIG_PRACH_ROOT_SEQUENCE_INDEX_TAG;
    cfg->num_tlv++;
    cfg->prach_config.num_prach_fd_occasions_list[i].k1.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FrequencyStart + (get_N_RA_RB( cfg->prach_config.prach_sub_c_spacing.value, scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing ) * i);
//k1= msg1_FrequencyStart + 12 (no. of FDM)(RB for PRACH occasion);
    cfg->prach_config.num_prach_fd_occasions_list[i].k1.tl.tag = NFAPI_NR_CONFIG_K1_TAG;
    cfg->num_tlv++;
    cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig;
    cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf.tl.tag = NFAPI_NR_CONFIG_PRACH_ZERO_CORR_CONF_TAG;
    cfg->num_tlv++;
    cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences.value = compute_nr_root_seq(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup,nb_preambles, frame_type, frequency_range);
    cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences.tl.tag = NFAPI_NR_CONFIG_NUM_ROOT_SEQUENCES_TAG;
    cfg->num_tlv++;
    cfg->prach_config.num_prach_fd_occasions_list[i].num_unused_root_sequences.value = 1;
  }

  cfg->prach_config.ssb_per_rach.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->ssb_perRACH_OccasionAndCB_PreamblesPerSSB->present-1;
  cfg->prach_config.ssb_per_rach.tl.tag = NFAPI_NR_CONFIG_SSB_PER_RACH_TAG;
  cfg->num_tlv++;

  // SSB Table Configuration
  int scs_scaling = 1<<(cfg->ssb_config.scs_common.value);
  if (scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA < 600000)
    scs_scaling = scs_scaling*3;
  if (scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA > 2016666)
    scs_scaling = scs_scaling>>2;
  uint32_t absolute_diff = (*scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB - scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
  uint16_t sco = absolute_diff%(12*scs_scaling);
  AssertFatal(sco==0,"absoluteFrequencySSB has a subcarrier offset of %d while it should be alligned with CRBs\n",sco);
  cfg->ssb_table.ssb_offset_point_a.value = absolute_diff/(12*scs_scaling) - 10; //absoluteFrequencySSB is the central frequency of SSB which is made by 20RBs in total
  cfg->ssb_table.ssb_offset_point_a.tl.tag = NFAPI_NR_CONFIG_SSB_OFFSET_POINT_A_TAG;
  cfg->num_tlv++;
  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++;

  switch (scc->ssb_PositionsInBurst->present) {
    case 1 :
      cfg->ssb_table.ssb_mask_list[0].ssb_mask.value = scc->ssb_PositionsInBurst->choice.shortBitmap.buf[0]<<24;
      cfg->ssb_table.ssb_mask_list[1].ssb_mask.value = 0;
      break;
    case 2 :
      cfg->ssb_table.ssb_mask_list[0].ssb_mask.value = scc->ssb_PositionsInBurst->choice.mediumBitmap.buf[0]<<24;
      cfg->ssb_table.ssb_mask_list[1].ssb_mask.value = 0;
      break;
    case 3 :
      cfg->ssb_table.ssb_mask_list[0].ssb_mask.value = 0;
      cfg->ssb_table.ssb_mask_list[1].ssb_mask.value = 0;
      for (i=0; i<4; i++) {
        cfg->ssb_table.ssb_mask_list[0].ssb_mask.value += (scc->ssb_PositionsInBurst->choice.longBitmap.buf[3-i]<<i*8);
        cfg->ssb_table.ssb_mask_list[1].ssb_mask.value += (scc->ssb_PositionsInBurst->choice.longBitmap.buf[7-i]<<i*8);
      }
      break;
    default:
      AssertFatal(1==0,"SSB bitmap size value %d undefined (allowed values 1,2,3) \n", scc->ssb_PositionsInBurst->present);
  }

  cfg->ssb_table.ssb_mask_list[0].ssb_mask.tl.tag = NFAPI_NR_CONFIG_SSB_MASK_TAG;
  cfg->num_tlv++;

  cfg->carrier_config.num_tx_ant.value = pdsch_AntennaPorts;
  AssertFatal(pdsch_AntennaPorts > 0 && pdsch_AntennaPorts < 13, "pdsch_AntennaPorts in 1...12\n");
  cfg->carrier_config.num_tx_ant.tl.tag = NFAPI_NR_CONFIG_NUM_TX_ANT_TAG;
  int num_ssb=0;
  for (int i=0;i<32;i++) {
    num_ssb += (cfg->ssb_table.ssb_mask_list[0].ssb_mask.value>>i)&1;
    num_ssb += (cfg->ssb_table.ssb_mask_list[1].ssb_mask.value>>i)&1;
  } 

  cfg->carrier_config.num_rx_ant.value = 1;//cfg->carrier_config.num_tx_ant.value;
  cfg->carrier_config.num_rx_ant.tl.tag = NFAPI_NR_CONFIG_NUM_RX_ANT_TAG;
  LOG_I(MAC,"Set TX/RX antenna number to %d (num ssb %d: %x,%x)\n",cfg->carrier_config.num_tx_ant.value,num_ssb,cfg->ssb_table.ssb_mask_list[0].ssb_mask.value,cfg->ssb_table.ssb_mask_list[1].ssb_mask.value);
  AssertFatal(cfg->carrier_config.num_tx_ant.value > 0,"carrier_config.num_tx_ant.value %d !\n",cfg->carrier_config.num_tx_ant.value );
  cfg->num_tlv++;
  cfg->num_tlv++;

  // TDD Table Configuration
  //cfg->tdd_table.tdd_period.value = scc->tdd_UL_DL_ConfigurationCommon->pattern1.dl_UL_TransmissionPeriodicity;
  cfg->tdd_table.tdd_period.tl.tag = NFAPI_NR_CONFIG_TDD_PERIOD_TAG;
  cfg->num_tlv++;
  if (scc->tdd_UL_DL_ConfigurationCommon->pattern1.ext1 == NULL)
    cfg->tdd_table.tdd_period.value = scc->tdd_UL_DL_ConfigurationCommon->pattern1.dl_UL_TransmissionPeriodicity;
  else {
    AssertFatal(scc->tdd_UL_DL_ConfigurationCommon->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530 != NULL,
		"scc->tdd_UL_DL_ConfigurationCommon->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530 is null\n");
    cfg->tdd_table.tdd_period.value = *scc->tdd_UL_DL_ConfigurationCommon->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530;
  }
  if(cfg->cell_config.frame_duplex_type.value == TDD){
    LOG_I(MAC,"Setting TDD configuration period to %d\n",cfg->tdd_table.tdd_period.value);
    int return_tdd = set_tdd_config_nr(cfg,
		    scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing,
                    scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSlots,
                    scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSymbols,
                    scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots,
                    scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSymbols);

    if (return_tdd != 0)
      LOG_E(MAC,"TDD configuration can not be done\n");
    else 
      LOG_I(MAC,"TDD has been properly configurated\n");
  }

}



extern uint16_t sl_ahead;
int rrc_mac_config_req_gNB(module_id_t Mod_idP, 
			   int ssb_SubcarrierOffset,
                           int pdsch_AntennaPorts,
                           int pusch_tgt_snrx10,
                           int pucch_tgt_snrx10,
                           NR_ServingCellConfigCommon_t *scc,
			   int add_ue,
			   uint32_t rnti,
			   NR_CellGroupConfig_t *secondaryCellGroup){

  if (scc != NULL ) {
    AssertFatal((scc->ssb_PositionsInBurst->present > 0) && (scc->ssb_PositionsInBurst->present < 4), "SSB Bitmap type %d is not valid\n",scc->ssb_PositionsInBurst->present);

    /* dimension UL_tti_req_ahead for number of slots in frame */
    const uint8_t slots_per_frame[5] = {10, 20, 40, 80, 160};
    const int n = slots_per_frame[*scc->ssbSubcarrierSpacing];
    RC.nrmac[Mod_idP]->UL_tti_req_ahead[0] = calloc(n, sizeof(nfapi_nr_ul_tti_request_t));
    AssertFatal(RC.nrmac[Mod_idP]->UL_tti_req_ahead[0],
                "could not allocate memory for RC.nrmac[]->UL_tti_req_ahead[]\n");
    /* fill in slot/frame numbers: slot is fixed, frame will be updated by
     * scheduler */
    for (int i = 0; i < n; ++i) {
      nfapi_nr_ul_tti_request_t *req = &RC.nrmac[Mod_idP]->UL_tti_req_ahead[0][i];
      /* consider that scheduler runs sl_ahead: the first sl_ahead slots are
       * already "in the past" and thus we put frame 1 instead of 0!  Note that
       * variable sl_ahead seems to not be correctly initialized, but I leave
       * it for information purposes here (the fix would always put 0, what
       * happens now, too) */
      req->SFN = i < sl_ahead;
      req->Slot = i;
    }

    RC.nrmac[Mod_idP]->common_channels[0].vrb_map_UL =
        calloc(n * 275, sizeof(uint16_t));
    AssertFatal(RC.nrmac[Mod_idP]->common_channels[0].vrb_map_UL,
                "could not allocate memory for RC.nrmac[]->common_channels[0].vrb_map_UL\n");

    LOG_I(MAC,"Configuring common parameters from NR ServingCellConfig\n");

    config_common(Mod_idP,
                  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);
  
    // if in nFAPI mode 
    if ( (nfapi_mode == 1 || nfapi_mode == 2) && (RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req == NULL) ){
      while(RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req == NULL) {
	// DJP AssertFatal(RC.nrmac[Mod_idP]->if_inst->PHY_config_req != NULL,"if_inst->phy_config_request is null\n");
	usleep(100 * 1000);
	printf("Waiting for PHY_config_req\n");
      }
    }
  
    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;
    phycfg.Mod_id = 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);

  }
  
  if (secondaryCellGroup) {

    RC.nrmac[Mod_idP]->secondaryCellGroupCommon = secondaryCellGroup;

    NR_UE_info_t *UE_info = &RC.nrmac[Mod_idP]->UE_info;
    if (add_ue == 1 && get_softmodem_params()->phy_test) {
      const int UE_id = add_new_nr_ue(Mod_idP,rnti);
      UE_info->secondaryCellGroup[UE_id] = secondaryCellGroup;
      compute_csi_bitlen (secondaryCellGroup, UE_info, UE_id);
      struct NR_ServingCellConfig__downlinkBWP_ToAddModList *bwpList =
          secondaryCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList;
      AssertFatal(bwpList->list.count == 1,
                  "downlinkBWP_ToAddModList has %d BWP!\n",
                  bwpList->list.count);
      const int bwp_id = 1;
      UE_info->UE_sched_ctrl[UE_id].active_bwp = bwpList->list.array[bwp_id - 1];
      struct NR_UplinkConfig__uplinkBWP_ToAddModList *ubwpList =
          secondaryCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->uplinkBWP_ToAddModList;
      AssertFatal(ubwpList->list.count == 1,
                  "uplinkBWP_ToAddModList has %d BWP!\n",
                  ubwpList->list.count);
      UE_info->UE_sched_ctrl[UE_id].active_ubwp = ubwpList->list.array[bwp_id - 1];
      LOG_I(PHY,"Added new UE_id %d/%x with initial secondaryCellGroup\n",UE_id,rnti);
    } else if (add_ue == 1 && !get_softmodem_params()->phy_test) {
      /* TODO: should check for free RA process */
      const int CC_id = 0;
      NR_RA_t *ra = &RC.nrmac[Mod_idP]->common_channels[CC_id].ra[0];
      ra->state = RA_IDLE;
      ra->secondaryCellGroup = secondaryCellGroup;
      if (secondaryCellGroup->spCellConfig->reconfigurationWithSync->rach_ConfigDedicated!=NULL) {
        if (secondaryCellGroup->spCellConfig->reconfigurationWithSync->rach_ConfigDedicated->choice.uplink->cfra != NULL) {
          ra->cfra = true;
          ra->rnti = rnti;
          struct NR_CFRA cfra = *secondaryCellGroup->spCellConfig->reconfigurationWithSync->rach_ConfigDedicated->choice.uplink->cfra;
          uint8_t num_preamble = cfra.resources.choice.ssb->ssb_ResourceList.list.count;
          ra->preambles.num_preambles = num_preamble;
          ra->preambles.preamble_list = (uint8_t *) malloc(num_preamble*sizeof(uint8_t));
          for (int i = 0; i < num_preamble; i++)
            ra->preambles.preamble_list[i] = cfra.resources.choice.ssb->ssb_ResourceList.list.array[i]->ra_PreambleIndex;
        }
      }
      LOG_I(PHY,"Added new RA process for UE RNTI %04x with initial secondaryCellGroup\n", rnti);
    } else { // secondaryCellGroup has been updated
      const int UE_id = find_nr_UE_id(Mod_idP,rnti);
      UE_info->secondaryCellGroup[UE_id] = secondaryCellGroup;
      LOG_I(PHY,"Modified UE_id %d/%x with secondaryCellGroup\n",UE_id,rnti);
    }
  }
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RRC_MAC_CONFIG, VCD_FUNCTION_OUT);
  
    
  return(0);

}// END rrc_mac_config_req_gNB