nr_ue_procedures.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 ue_procedures.c
 * \brief procedures related to UE
 * \author R. Knopp, K.H. HSU, G. Casati
 * \date 2018
 * \version 0.1
 * \company Eurecom / NTUST
 * \email: knopp@eurecom.fr, kai-hsiang.hsu@eurecom.fr, guido.casati@iis.fraunhofer.de
 * \note
 * \warning
 */


#include <stdio.h>
#include <math.h>

/* exe */
#include "executables/nr-softmodem.h"

/* RRC*/
#include "RRC/NR_UE/rrc_proto.h"
#include "NR_RACH-ConfigCommon.h"
#include "NR_RACH-ConfigGeneric.h"
#include "NR_FrequencyInfoDL.h"
#include "NR_PDCCH-ConfigCommon.h"

/* MAC */
#include "NR_MAC_COMMON/nr_mac.h"
#include "NR_MAC_UE/mac_proto.h"
#include "NR_MAC_UE/mac_extern.h"
#include "NR_MAC_COMMON/nr_mac_extern.h"
#include "common/utils/nr/nr_common.h"

/* PHY */
#include "PHY/NR_TRANSPORT/nr_dci.h"
#include "executables/softmodem-common.h"
#include "SCHED_NR_UE/defs.h"

/* utils */
#include "assertions.h"
#include "asn1_conversions.h"
#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"

//#define ENABLE_MAC_PAYLOAD_DEBUG 1
//#define DEBUG_EXTRACT_DCI
//#define DEBUG_RAR

int get_rnti_type(NR_UE_MAC_INST_t *mac, uint16_t rnti){

    RA_config_t *ra = &mac->ra;
    int rnti_type;

    if (rnti == ra->ra_rnti) {
      rnti_type = NR_RNTI_RA;
    } else if (rnti == mac->crnti) {
      rnti_type = NR_RNTI_C;
    } else if (rnti == ra->t_crnti) {
      rnti_type = NR_RNTI_TC;
    } else if (rnti == 0xFFFE) {
      rnti_type = NR_RNTI_P;
    } else if (rnti == 0xFFFF) {
      rnti_type = NR_RNTI_SI;
    } else {
      AssertFatal(1 == 0, "In %s: Not identified/handled rnti %d \n", __FUNCTION__, rnti);
    }

    LOG_D(MAC, "In %s: returning rnti_type %s \n", __FUNCTION__, rnti_types[rnti_type]);

    return rnti_type;

}


int8_t nr_ue_decode_mib(module_id_t module_id,
                        int cc_id,
                        uint8_t gNB_index,
                        uint8_t extra_bits,	//	8bits 38.212 c7.1.1
                        uint32_t ssb_length,
                        uint32_t ssb_index,
                        void *pduP,
                        uint16_t cell_id)
{
  LOG_I(MAC,"[L2][MAC] decode mib\n");

  NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);

  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");
  //if(mac->mib != NULL){
  uint16_t frame = (mac->mib->systemFrameNumber.buf[0] >> mac->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);
  uint8_t half_frame_bit = ( extra_bits >> 4 ) & 0x1;               //	extra bits[4]
  uint8_t ssb_subcarrier_offset_msb = ( extra_bits >> 5 ) & 0x1;    //	extra bits[5]
  uint8_t ssb_subcarrier_offset = (uint8_t)mac->mib->ssb_SubcarrierOffset;

  frame = frame << 4;
  frame = frame | frame_number_4lsb;
  if(ssb_length == 64){
    for (int i=0; i<3; i++)
      ssb_index += (((extra_bits>>(7-i))&0x01)<<(3+i));
  }else{
    if(ssb_subcarrier_offset_msb){
      ssb_subcarrier_offset = ssb_subcarrier_offset | 0x10;
    }
  }

  LOG_D(MAC,"system frame number(6 MSB bits): %d\n",  mac->mib->systemFrameNumber.buf[0]);
  LOG_D(MAC,"system frame number(with LSB): %d\n", (int)frame);
  LOG_D(MAC,"subcarrier spacing (0=15or60, 1=30or120): %d\n", (int)mac->mib->subCarrierSpacingCommon);
  LOG_D(MAC,"ssb carrier offset(with MSB):  %d\n", (int)ssb_subcarrier_offset);
  LOG_D(MAC,"dmrs type A position (0=pos2,1=pos3): %d\n", (int)mac->mib->dmrs_TypeA_Position);
  LOG_D(MAC,"cell barred (0=barred,1=notBarred): %d\n", (int)mac->mib->cellBarred);
  LOG_D(MAC,"intra frequency reselection (0=allowed,1=notAllowed): %d\n", (int)mac->mib->intraFreqReselection);
  LOG_D(MAC,"half frame bit(extra bits):    %d\n", (int)half_frame_bit);
  LOG_D(MAC,"ssb index(extra bits):         %d\n", (int)ssb_index);

  //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,
                                        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;
  mac->dl_config_request.sfn = mac->type0_PDCCH_CSS_config.frame;
  mac->dl_config_request.slot = (ssb_index>>1) + ((ssb_index>>4)<<1); // not valid for 240kHz SCS

  return 0;
}

int8_t nr_ue_decode_sib1(module_id_t module_id,
                         int cc_id,
                         unsigned int gNB_index,
                         uint32_t sibs_mask,
                         uint8_t *pduP,
                         uint32_t pdu_len) {
  LOG_D(MAC, "Decode sib1\n");
  nr_mac_rrc_data_ind_ue(module_id, cc_id, gNB_index, NR_BCCH_DL_SCH, (uint8_t *) pduP, pdu_len);
  return 0;
}

//  TODO: change to UE parameter, scs: 15KHz, slot duration: 1ms
uint32_t get_ssb_frame(uint32_t test){
  return test;
}

/*
 * This code contains all the functions needed to process all dci fields.
 * These tables and functions are going to be called by function nr_ue_process_dci
 */
int8_t nr_ue_process_dci_freq_dom_resource_assignment(nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu,
						      fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu,
						      uint16_t n_RB_ULBWP,
						      uint16_t n_RB_DLBWP,
						      uint16_t riv
						      ){

  /*
   * TS 38.214 subclause 5.1.2.2 Resource allocation in frequency domain (downlink)
   * when the scheduling grant is received with DCI format 1_0, then downlink resource allocation type 1 is used
   */
  if(dlsch_config_pdu != NULL){

    /*
     * TS 38.214 subclause 5.1.2.2.1 Downlink resource allocation type 0
     */
    /*
     * TS 38.214 subclause 5.1.2.2.2 Downlink resource allocation type 1
     */
    dlsch_config_pdu->number_rbs = NRRIV2BW(riv,n_RB_DLBWP);
    dlsch_config_pdu->start_rb   = NRRIV2PRBOFFSET(riv,n_RB_DLBWP);

    // Sanity check in case a false or erroneous DCI is received
    if ((dlsch_config_pdu->number_rbs < 1 ) || (dlsch_config_pdu->number_rbs > n_RB_DLBWP - dlsch_config_pdu->start_rb)) {
      // DCI is invalid!
      LOG_W(MAC, "Frequency domain assignment values are invalid! #RBs: %d, Start RB: %d, n_RB_DLBWP: %d \n", dlsch_config_pdu->number_rbs, dlsch_config_pdu->start_rb, n_RB_DLBWP);
      return -1;
    }

    LOG_D(MAC,"riv = %i\n", riv);
    LOG_D(MAC,"n_RB_DLBWP = %i\n", n_RB_DLBWP);
    LOG_D(MAC,"number_rbs = %i\n", dlsch_config_pdu->number_rbs);
    LOG_D(MAC,"start_rb = %i\n", dlsch_config_pdu->start_rb);

  }
  if(pusch_config_pdu != NULL){
    /*
     * TS 38.214 subclause 6.1.2.2 Resource allocation in frequency domain (uplink)
     */
    /*
     * TS 38.214 subclause 6.1.2.2.1 Uplink resource allocation type 0
     */
    /*
     * TS 38.214 subclause 6.1.2.2.2 Uplink resource allocation type 1
     */

    pusch_config_pdu->rb_size  = NRRIV2BW(riv,n_RB_ULBWP);
    pusch_config_pdu->rb_start = NRRIV2PRBOFFSET(riv,n_RB_ULBWP);

    // Sanity check in case a false or erroneous DCI is received
    if ((pusch_config_pdu->rb_size < 1) || (pusch_config_pdu->rb_size > n_RB_ULBWP - pusch_config_pdu->rb_start)) {
      // DCI is invalid!
      LOG_W(MAC, "Frequency domain assignment values are invalid! #RBs: %d, Start RB: %d, n_RB_ULBWP: %d \n",pusch_config_pdu->rb_size, pusch_config_pdu->rb_start, n_RB_ULBWP);
      return -1;
    }

  }
  return 0;
}

int8_t nr_ue_process_dci_time_dom_resource_assignment(NR_UE_MAC_INST_t *mac,
						      nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu,
						      fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu,
						      uint8_t time_domain_ind
						      ){
  int dmrs_typeA_pos = mac->scc->dmrs_TypeA_Position;
//  uint8_t k_offset=0;
  uint8_t sliv_S=0;
  uint8_t sliv_L=0;
  uint8_t table_5_1_2_1_1_2_time_dom_res_alloc_A[16][3]={ // for PDSCH from TS 38.214 subclause 5.1.2.1.1
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?12:11}, // row index 1
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?10:9},  // row index 2
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?9:8},   // row index 3
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?7:6},   // row index 4
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?5:4},   // row index 5
    {0,(dmrs_typeA_pos == 0)?9:10,(dmrs_typeA_pos == 0)?4:4},   // row index 6
    {0,(dmrs_typeA_pos == 0)?4:6, (dmrs_typeA_pos == 0)?4:4},   // row index 7
    {0,5,7},  // row index 8
    {0,5,2},  // row index 9
    {0,9,2},  // row index 10
    {0,12,2}, // row index 11
    {0,1,13}, // row index 12
    {0,1,6},  // row index 13
    {0,2,4},  // row index 14
    {0,4,7},  // row index 15
    {0,8,4}   // row index 16
  };
  /*uint8_t table_5_1_2_1_1_3_time_dom_res_alloc_A_extCP[16][3]={ // for PDSCH from TS 38.214 subclause 5.1.2.1.1
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?6:5},   // row index 1
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?10:9},  // row index 2
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?9:8},   // row index 3
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?7:6},   // row index 4
    {0,(dmrs_typeA_pos == 0)?2:3, (dmrs_typeA_pos == 0)?5:4},   // row index 5
    {0,(dmrs_typeA_pos == 0)?6:8, (dmrs_typeA_pos == 0)?4:2},   // row index 6
    {0,(dmrs_typeA_pos == 0)?4:6, (dmrs_typeA_pos == 0)?4:4},   // row index 7
    {0,5,6},  // row index 8
    {0,5,2},  // row index 9
    {0,9,2},  // row index 10
    {0,10,2}, // row index 11
    {0,1,11}, // row index 12
    {0,1,6},  // row index 13
    {0,2,4},  // row index 14
    {0,4,6},  // row index 15
    {0,8,4}   // row index 16
    };*/
  /*uint8_t table_5_1_2_1_1_4_time_dom_res_alloc_B[16][3]={ // for PDSCH from TS 38.214 subclause 5.1.2.1.1
    {0,2,2},  // row index 1
    {0,4,2},  // row index 2
    {0,6,2},  // row index 3
    {0,8,2},  // row index 4
    {0,10,2}, // row index 5
    {1,2,2},  // row index 6
    {1,4,2},  // row index 7
    {0,2,4},  // row index 8
    {0,4,4},  // row index 9
    {0,6,4},  // row index 10
    {0,8,4},  // row index 11
    {0,10,4}, // row index 12
    {0,2,7},  // row index 13
    {0,(dmrs_typeA_pos == 0)?2:3,(dmrs_typeA_pos == 0)?12:11},  // row index 14
    {1,2,4},  // row index 15
    {0,0,0}   // row index 16
    };*/
  /*uint8_t table_5_1_2_1_1_5_time_dom_res_alloc_C[16][3]={ // for PDSCH from TS 38.214 subclause 5.1.2.1.1
    {0,2,2},  // row index 1
    {0,4,2},  // row index 2
    {0,6,2},  // row index 3
    {0,8,2},  // row index 4
    {0,10,2}, // row index 5
    {0,0,0},  // row index 6
    {0,0,0},  // row index 7
    {0,2,4},  // row index 8
    {0,4,4},  // row index 9
    {0,6,4},  // row index 10
    {0,8,4},  // row index 11
    {0,10,4}, // row index 12
    {0,2,7},  // row index 13
    {0,(dmrs_typeA_pos == 0)?2:3,(dmrs_typeA_pos == 0)?12:11},  // row index 14
    {0,0,6},  // row index 15
    {0,2,6}   // row index 16
    };*/
  uint8_t mu_pusch = 1;
  // definition table j Table 6.1.2.1.1-4
  uint8_t j = (mu_pusch==3)?3:(mu_pusch==2)?2:1;
  uint8_t table_6_1_2_1_1_2_time_dom_res_alloc_A[16][3]={ // for PUSCH from TS 38.214 subclause 6.1.2.1.1
    {j,  0,14}, // row index 1
    {j,  0,12}, // row index 2
    {j,  0,10}, // row index 3
    {j,  2,10}, // row index 4
    {j,  4,10}, // row index 5
    {j,  4,8},  // row index 6
    {j,  4,6},  // row index 7
    {j+1,0,14}, // row index 8
    {j+1,0,12}, // row index 9
    {j+1,0,10}, // row index 10
    {j+2,0,14}, // row index 11
    {j+2,0,12}, // row index 12
    {j+2,0,10}, // row index 13
    {j,  8,6},  // row index 14
    {j+3,0,14}, // row index 15
    {j+3,0,10}  // row index 16
  };
  /*uint8_t table_6_1_2_1_1_3_time_dom_res_alloc_A_extCP[16][3]={ // for PUSCH from TS 38.214 subclause 6.1.2.1.1
    {j,  0,8},  // row index 1
    {j,  0,12}, // row index 2
    {j,  0,10}, // row index 3
    {j,  2,10}, // row index 4
    {j,  4,4},  // row index 5
    {j,  4,8},  // row index 6
    {j,  4,6},  // row index 7
    {j+1,0,8},  // row index 8
    {j+1,0,12}, // row index 9
    {j+1,0,10}, // row index 10
    {j+2,0,6},  // row index 11
    {j+2,0,12}, // row index 12
    {j+2,0,10}, // row index 13
    {j,  8,4},  // row index 14
    {j+3,0,8},  // row index 15
    {j+3,0,10}  // row index 16
    };*/

  /*
   * TS 38.214 subclause 5.1.2.1 Resource allocation in time domain (downlink)
   */
  if(dlsch_config_pdu != NULL){
    NR_PDSCH_TimeDomainResourceAllocationList_t *pdsch_TimeDomainAllocationList = NULL;
    if (mac->DLbwp[0]->bwp_Dedicated->pdsch_Config->choice.setup->pdsch_TimeDomainAllocationList)
      pdsch_TimeDomainAllocationList = mac->DLbwp[0]->bwp_Dedicated->pdsch_Config->choice.setup->pdsch_TimeDomainAllocationList->choice.setup;
    else if (mac->DLbwp[0]->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList)
      pdsch_TimeDomainAllocationList = mac->DLbwp[0]->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList;
    if (pdsch_TimeDomainAllocationList) {

      if (time_domain_ind >= pdsch_TimeDomainAllocationList->list.count) {
        LOG_E(MAC, "time_domain_ind %d >= pdsch->TimeDomainAllocationList->list.count %d\n",
              time_domain_ind, pdsch_TimeDomainAllocationList->list.count);
        dlsch_config_pdu->start_symbol   = 0;
        dlsch_config_pdu->number_symbols = 0;
        return -1;
      }

      int startSymbolAndLength = pdsch_TimeDomainAllocationList->list.array[time_domain_ind]->startSymbolAndLength;
      int S,L;
      SLIV2SL(startSymbolAndLength,&S,&L);
      dlsch_config_pdu->start_symbol=S;
      dlsch_config_pdu->number_symbols=L;

      LOG_D(MAC,"SLIV = %i\n", startSymbolAndLength);
      LOG_D(MAC,"start_symbol = %i\n", dlsch_config_pdu->start_symbol);
      LOG_D(MAC,"number_symbols = %i\n", dlsch_config_pdu->number_symbols);

    }
    else {// Default configuration from tables
//      k_offset = table_5_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][0];
      sliv_S   = table_5_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][1];
      sliv_L   = table_5_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][2];
      // k_offset = table_5_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][0];
      // sliv_S   = table_5_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][1];
      // sliv_L   = table_5_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][2];
      // k_offset = table_5_1_2_1_1_4_time_dom_res_alloc_B[nr_pdci_info_extracted->time_dom_resource_assignment][0];
      // sliv_S   = table_5_1_2_1_1_4_time_dom_res_alloc_B[nr_pdci_info_extracted->time_dom_resource_assignment][1];
      // sliv_L   = table_5_1_2_1_1_4_time_dom_res_alloc_B[nr_pdci_info_extracted->time_dom_resource_assignment][2];
      // k_offset = table_5_1_2_1_1_5_time_dom_res_alloc_C[nr_pdci_info_extracted->time_dom_resource_assignment][0];
      // sliv_S   = table_5_1_2_1_1_5_time_dom_res_alloc_C[nr_pdci_info_extracted->time_dom_resource_assignment][1];
      // sliv_L   = table_5_1_2_1_1_5_time_dom_res_alloc_C[nr_pdci_info_extracted->time_dom_resource_assignment][2];
      dlsch_config_pdu->number_symbols = sliv_L;
      dlsch_config_pdu->start_symbol = sliv_S;
    }
  }	/*
	 * TS 38.214 subclause 6.1.2.1 Resource allocation in time domain (uplink)
	 */
  if(pusch_config_pdu != NULL){
    NR_PUSCH_TimeDomainResourceAllocationList_t *pusch_TimeDomainAllocationList = NULL;
    if (mac->ULbwp[0]->bwp_Dedicated->pusch_Config->choice.setup->pusch_TimeDomainAllocationList) {
      pusch_TimeDomainAllocationList = mac->ULbwp[0]->bwp_Dedicated->pusch_Config->choice.setup->pusch_TimeDomainAllocationList->choice.setup;
    }
    else if (mac->ULbwp[0]->bwp_Common->pusch_ConfigCommon->choice.setup->pusch_TimeDomainAllocationList) {
      pusch_TimeDomainAllocationList = mac->ULbwp[0]->bwp_Common->pusch_ConfigCommon->choice.setup->pusch_TimeDomainAllocationList;
    }
    	
    if (pusch_TimeDomainAllocationList) {
      if (time_domain_ind >= pusch_TimeDomainAllocationList->list.count) {
        LOG_E(MAC, "time_domain_ind %d >= pusch->TimeDomainAllocationList->list.count %d\n",
              time_domain_ind, pusch_TimeDomainAllocationList->list.count);
        pusch_config_pdu->start_symbol_index=0;
        pusch_config_pdu->nr_of_symbols=0;
        return -1;
      }
      
      int startSymbolAndLength = pusch_TimeDomainAllocationList->list.array[time_domain_ind]->startSymbolAndLength;
      int S,L;
      SLIV2SL(startSymbolAndLength,&S,&L);
      pusch_config_pdu->start_symbol_index=S;
      pusch_config_pdu->nr_of_symbols=L;
    }
    else {
//      k_offset = table_6_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][0];
      sliv_S   = table_6_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][1];
      sliv_L   = table_6_1_2_1_1_2_time_dom_res_alloc_A[time_domain_ind-1][2];
      // k_offset = table_6_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][0];
      // sliv_S   = table_6_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][1];
      // sliv_L   = table_6_1_2_1_1_3_time_dom_res_alloc_A_extCP[nr_pdci_info_extracted->time_dom_resource_assignment][2];
      pusch_config_pdu->nr_of_symbols = sliv_L;
      pusch_config_pdu->start_symbol_index = sliv_S;
    }
  }
  return 0;
}

int nr_ue_process_dci_indication_pdu(module_id_t module_id,int cc_id, int gNB_index, frame_t frame, int slot, fapi_nr_dci_indication_pdu_t *dci) {

  NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);

  LOG_D(MAC,"Received dci indication (rnti %x,dci format %d,n_CCE %d,payloadSize %d,payload %llx)\n",
	dci->rnti,dci->dci_format,dci->n_CCE,dci->payloadSize,*(unsigned long long*)dci->payloadBits);

  uint32_t dci_format = nr_extract_dci_info(mac, dci->dci_format, dci->payloadSize, dci->rnti, (uint64_t *)dci->payloadBits, def_dci_pdu_rel15);
  return (nr_ue_process_dci(module_id, cc_id, gNB_index, frame, slot, def_dci_pdu_rel15, dci->rnti, dci_format));
}

int8_t nr_ue_process_dci(module_id_t module_id, int cc_id, uint8_t gNB_index, frame_t frame, int slot, dci_pdu_rel15_t *dci, uint16_t rnti, uint8_t dci_format){

  int ret = 0;
  int pucch_res_set_cnt = 0, valid = 0;
  frame_t frame_tx = 0;
  int slot_tx = 0;
  bool valid_ptrs_setup = 0;
  NR_UE_MAC_INST_t *mac = get_mac_inst(module_id);
  RA_config_t *ra = &mac->ra;
  fapi_nr_dl_config_request_t *dl_config = &mac->dl_config_request;
  uint8_t is_Msg3 = 0;

  //const uint16_t n_RB_DLBWP = dl_config->dl_config_list[dl_config->number_pdus].dci_config_pdu.dci_config_rel15.N_RB_BWP; //make sure this has been set
  AssertFatal(mac->DLbwp[0]!=NULL,"DLbwp[0] should not be zero here!\n");
  AssertFatal(mac->ULbwp[0]!=NULL,"DLbwp[0] should not be zero here!\n");

  const uint16_t n_RB_DLBWP = (ra->ra_state == WAIT_RAR) ? NRRIV2BW(mac->scc->downlinkConfigCommon->initialDownlinkBWP->genericParameters.locationAndBandwidth, MAX_BWP_SIZE) : NRRIV2BW(mac->DLbwp[0]->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);

  LOG_I(MAC, "In %s: Processing received DCI format %s (DL BWP %d) harq_pid %d\n", 
             __FUNCTION__, dci_formats[dci_format], n_RB_DLBWP, dci->harq_pid);



  switch(dci_format){
  case NR_UL_DCI_FORMAT_0_0: {
    /*
     *  with CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI
     *    0  IDENTIFIER_DCI_FORMATS:
     *    10 FREQ_DOM_RESOURCE_ASSIGNMENT_UL: PUSCH hopping with resource allocation type 1 not considered
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 6.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    17 FREQ_HOPPING_FLAG: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    25 NDI:
     *    26 RV:
     *    27 HARQ_PROCESS_NUMBER:
     *    32 TPC_PUSCH:
     *    49 PADDING_NR_DCI: (Note 2) If DCI format 0_0 is monitored in common search space
     *    50 SUL_IND_0_0:
     */
    // Calculate the slot in which ULSCH should be scheduled. This is current slot + K2,
    // where K2 is the offset between the slot in which UL DCI is received and the slot
    // in which ULSCH should be scheduled. K2 is configured in RRC configuration.  
    // todo:
    // - SUL_IND_0_0

    // Schedule PUSCH
    ret = nr_ue_pusch_scheduler(mac, is_Msg3, frame, slot, &frame_tx, &slot_tx, dci->time_domain_assignment.val);

    if (ret != -1){

      // Get UL config request corresponding slot_tx
      fapi_nr_ul_config_request_t *ul_config = get_ul_config_request(mac, slot_tx);

      if (!ul_config) {
        LOG_W(MAC, "In %s: ul_config request is NULL. Probably due to unexpected UL DCI in frame.slot %d.%d. Ignoring DCI!\n", __FUNCTION__, frame, slot);
        return -1;
      }
      AssertFatal(ul_config->number_pdus < sizeof(ul_config->ul_config_list) / sizeof(ul_config->ul_config_list[0]),
                  "Number of PDUS in ul_config = %d > ul_config_list num elements", ul_config->number_pdus);
      nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu = &ul_config->ul_config_list[ul_config->number_pdus].pusch_config_pdu;

      fill_ul_config(ul_config, frame_tx, slot_tx, FAPI_NR_UL_CONFIG_TYPE_PUSCH);

      // Config PUSCH PDU
      ret = nr_config_pusch_pdu(mac, pusch_config_pdu, dci, NULL, rnti, &dci_format);

      if (ret != -1 && ra->RA_active && mac->crnti){
        nr_ra_succeeded(module_id, frame, slot);
      }

    }
    
    break;
  }

  case NR_UL_DCI_FORMAT_0_1: {
    /*
     *  with CRC scrambled by C-RNTI or CS-RNTI or SP-CSI-RNTI or new-RNTI
     *    0  IDENTIFIER_DCI_FORMATS:
     *    1  CARRIER_IND
     *    2  SUL_IND_0_1
     *    7  BANDWIDTH_PART_IND
     *    10 FREQ_DOM_RESOURCE_ASSIGNMENT_UL: PUSCH hopping with resource allocation type 1 not considered
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 6.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    17 FREQ_HOPPING_FLAG: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    25 NDI:
     *    26 RV:
     *    27 HARQ_PROCESS_NUMBER:
     *    29 FIRST_DAI
     *    30 SECOND_DAI
     *    32 TPC_PUSCH:
     *    36 SRS_RESOURCE_IND:
     *    37 PRECOD_NBR_LAYERS:
     *    38 ANTENNA_PORTS:
     *    40 SRS_REQUEST:
     *    42 CSI_REQUEST:
     *    43 CBGTI
     *    45 PTRS_DMRS
     *    46 BETA_OFFSET_IND
     *    47 DMRS_SEQ_INI
     *    48 UL_SCH_IND
     *    49 PADDING_NR_DCI: (Note 2) If DCI format 0_0 is monitored in common search space
     */
    // TODO: 
    // - FIRST_DAI
    // - SECOND_DAI
    // - SRS_RESOURCE_IND

    // Schedule PUSCH
    ret = nr_ue_pusch_scheduler(mac, is_Msg3, frame, slot, &frame_tx, &slot_tx, dci->time_domain_assignment.val);

    if (ret != -1){

      // Get UL config request corresponding slot_tx
      fapi_nr_ul_config_request_t *ul_config = get_ul_config_request(mac, slot_tx);

      if (!ul_config) {
        LOG_W(MAC, "In %s: ul_config request is NULL. Probably due to unexpected UL DCI in frame.slot %d.%d. Ignoring DCI!\n", __FUNCTION__, frame, slot);
        return -1;
      }
      ul_config->number_pdus = 0;
      AssertFatal(ul_config->number_pdus < sizeof(ul_config->ul_config_list) / sizeof(ul_config->ul_config_list[0]),
                  "Number of PDUS in ul_config = %d > ul_config_list num elements", ul_config->number_pdus);
      nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu = &ul_config->ul_config_list[ul_config->number_pdus].pusch_config_pdu;

      fill_ul_config(ul_config, frame_tx, slot_tx, FAPI_NR_UL_CONFIG_TYPE_PUSCH);

      // Config PUSCH PDU
      ret = nr_config_pusch_pdu(mac, pusch_config_pdu, dci, NULL, rnti, &dci_format);

      if (ret != -1 && ra->RA_active && mac->crnti){
        nr_ra_succeeded(module_id, frame, slot);
      }

    }

    break;
  }

  case NR_DL_DCI_FORMAT_1_0: {
    /*
     *  with CRC scrambled by C-RNTI or CS-RNTI or new-RNTI
     *    0  IDENTIFIER_DCI_FORMATS:
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    25 NDI:
     *    26 RV:
     *    27 HARQ_PROCESS_NUMBER:
     *    28 DAI_: For format1_1: 4 if more than one serving cell are configured in the DL and the higher layer parameter HARQ-ACK-codebook=dynamic, where the 2 MSB bits are the counter DAI and the 2 LSB bits are the total DAI
     *    33 TPC_PUCCH:
     *    34 PUCCH_RESOURCE_IND:
     *    35 PDSCH_TO_HARQ_FEEDBACK_TIME_IND:
     *    55 RESERVED_NR_DCI
     *  with CRC scrambled by P-RNTI
     *    8  SHORT_MESSAGE_IND
     *    9  SHORT_MESSAGES
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    31 TB_SCALING
     *    55 RESERVED_NR_DCI
     *  with CRC scrambled by SI-RNTI
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    26 RV:
     *    55 RESERVED_NR_DCI
     *  with CRC scrambled by RA-RNTI
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    31 TB_SCALING
     *    55 RESERVED_NR_DCI
     *  with CRC scrambled by TC-RNTI
     *    0  IDENTIFIER_DCI_FORMATS:
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    24 MCS:
     *    25 NDI:
     *    26 RV:
     *    27 HARQ_PROCESS_NUMBER:
     *    28 DAI_: For format1_1: 4 if more than one serving cell are configured in the DL and the higher layer parameter HARQ-ACK-codebook=dynamic, where the 2 MSB bits are the counter DAI and the 2 LSB bits are the total DAI
     *    33 TPC_PUCCH:
     */

    dl_config->dl_config_list[dl_config->number_pdus].dlsch_config_pdu.rnti = rnti;
    fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu_1_0 = &dl_config->dl_config_list[dl_config->number_pdus].dlsch_config_pdu.dlsch_config_rel15;
    NR_PDSCH_Config_t *pdsch_config=mac->DLbwp[0]->bwp_Dedicated->pdsch_Config->choice.setup;
    uint16_t BWPSize = 0;

    if(rnti == SI_RNTI) {
      dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_SI_DLSCH;
      dlsch_config_pdu_1_0->BWPSize = mac->type0_PDCCH_CSS_config.num_rbs;
      dlsch_config_pdu_1_0->BWPStart = mac->type0_PDCCH_CSS_config.cset_start_rb;
      dlsch_config_pdu_1_0->SubcarrierSpacing = mac->mib->subCarrierSpacingCommon;
      pdsch_config->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->dmrs_AdditionalPosition = NULL; // For PDSCH with mapping type A, the UE shall assume dmrs-AdditionalPosition='pos2'
      BWPSize = dlsch_config_pdu_1_0->BWPSize;
    } else {
      if (ra->RA_window_cnt >= 0 && rnti == ra->ra_rnti){
        dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_RA_DLSCH;
      } else {
        dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_DLSCH;
      }
      dlsch_config_pdu_1_0->BWPSize = NRRIV2BW(mac->DLbwp[0]->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
      dlsch_config_pdu_1_0->BWPStart = NRRIV2PRBOFFSET(mac->DLbwp[0]->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
      dlsch_config_pdu_1_0->SubcarrierSpacing = mac->DLbwp[0]->bwp_Common->genericParameters.subcarrierSpacing;
      BWPSize = n_RB_DLBWP;
    }

    /* IDENTIFIER_DCI_FORMATS */
    /* FREQ_DOM_RESOURCE_ASSIGNMENT_DL */
    if (nr_ue_process_dci_freq_dom_resource_assignment(NULL,dlsch_config_pdu_1_0,0,BWPSize,dci->frequency_domain_assignment.val) < 0) {
      LOG_W(MAC, "[%d.%d] Invalid frequency_domain_assignment. Possibly due to false DCI. Ignoring DCI!\n", frame, slot);
      return -1;
    }
    /* TIME_DOM_RESOURCE_ASSIGNMENT */
    if (nr_ue_process_dci_time_dom_resource_assignment(mac,NULL,dlsch_config_pdu_1_0,dci->time_domain_assignment.val) < 0) {
      LOG_W(MAC, "[%d.%d] Invalid time_domain_assignment. Possibly due to false DCI. Ignoring DCI!\n", frame, slot);
      return -1;
    }
    /* dmrs symbol positions*/
    dlsch_config_pdu_1_0->dlDmrsSymbPos = fill_dmrs_mask(pdsch_config,
							 mac->scc->dmrs_TypeA_Position,
               dlsch_config_pdu_1_0->start_symbol+dlsch_config_pdu_1_0->number_symbols);
    dlsch_config_pdu_1_0->dmrsConfigType = mac->DLbwp[0]->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->dmrs_Type == NULL ? 0 : 1;
    /* number of DM-RS CDM groups without data according to subclause 5.1.6.2 of 3GPP TS 38.214 version 15.9.0 Release 15 */
    if (dlsch_config_pdu_1_0->number_symbols == 2)
      dlsch_config_pdu_1_0->n_dmrs_cdm_groups = 1;
    else
      dlsch_config_pdu_1_0->n_dmrs_cdm_groups = 2;
    /* VRB_TO_PRB_MAPPING */
    dlsch_config_pdu_1_0->vrb_to_prb_mapping = (dci->vrb_to_prb_mapping.val == 0) ? vrb_to_prb_mapping_non_interleaved:vrb_to_prb_mapping_interleaved;
    /* MCS TABLE INDEX */
    dlsch_config_pdu_1_0->mcs_table = (pdsch_config->mcs_Table) ? (*pdsch_config->mcs_Table + 1) : 0;
    /* MCS */
    dlsch_config_pdu_1_0->mcs = dci->mcs;
    // Basic sanity check for MCS value to check for a false or erroneous DCI
    if (dlsch_config_pdu_1_0->mcs > 28) {
      LOG_W(MAC, "[%d.%d] MCS value %d out of bounds! Possibly due to false DCI. Ignoring DCI!\n", frame, slot, dlsch_config_pdu_1_0->mcs);
      return -1;
    }
    /* NDI (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI)*/
    dlsch_config_pdu_1_0->ndi = dci->ndi;
    /* RV (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI)*/
    dlsch_config_pdu_1_0->rv = dci->rv;
    /* HARQ_PROCESS_NUMBER (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI)*/
    dlsch_config_pdu_1_0->harq_process_nbr = dci->harq_pid;
    /* DAI (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI)*/
    dlsch_config_pdu_1_0->dai = dci->dai[0].val;
    /* TB_SCALING (only if CRC scrambled by P-RNTI or RA-RNTI) */
    // according to TS 38.214 Table 5.1.3.2-3
    if (dci->tb_scaling == 0) dlsch_config_pdu_1_0->scaling_factor_S = 1;
    if (dci->tb_scaling == 1) dlsch_config_pdu_1_0->scaling_factor_S = 0.5;
    if (dci->tb_scaling == 2) dlsch_config_pdu_1_0->scaling_factor_S = 0.25;
    if (dci->tb_scaling == 3) dlsch_config_pdu_1_0->scaling_factor_S = 0; // value not defined in table
    /* TPC_PUCCH (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI or TC-RNTI)*/
    // according to TS 38.213 Table 7.2.1-1
    if (dci->tpc == 0) dlsch_config_pdu_1_0->accumulated_delta_PUCCH = -1;
    if (dci->tpc == 1) dlsch_config_pdu_1_0->accumulated_delta_PUCCH = 0;
    if (dci->tpc == 2) dlsch_config_pdu_1_0->accumulated_delta_PUCCH = 1;
    if (dci->tpc == 3) dlsch_config_pdu_1_0->accumulated_delta_PUCCH = 3;
    /* PUCCH_RESOURCE_IND (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI)*/
    //if (dci->pucch_resource_indicator == 0) dlsch_config_pdu_1_0->pucch_resource_id = 1; //pucch-ResourceId obtained from the 1st value of resourceList FIXME!!!
    //if (dci->pucch_resource_indicator == 1) dlsch_config_pdu_1_0->pucch_resource_id = 2; //pucch-ResourceId obtained from the 2nd value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 2) dlsch_config_pdu_1_0->pucch_resource_id = 3; //pucch-ResourceId obtained from the 3rd value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 3) dlsch_config_pdu_1_0->pucch_resource_id = 4; //pucch-ResourceId obtained from the 4th value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 4) dlsch_config_pdu_1_0->pucch_resource_id = 5; //pucch-ResourceId obtained from the 5th value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 5) dlsch_config_pdu_1_0->pucch_resource_id = 6; //pucch-ResourceId obtained from the 6th value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 6) dlsch_config_pdu_1_0->pucch_resource_id = 7; //pucch-ResourceId obtained from the 7th value of resourceList FIXME!!
    //if (dci->pucch_resource_indicator == 7) dlsch_config_pdu_1_0->pucch_resource_id = 8; //pucch-ResourceId obtained from the 8th value of resourceList FIXME!!
    dlsch_config_pdu_1_0->pucch_resource_id = dci->pucch_resource_indicator;
    // Sanity check for pucch_resource_indicator value received to check for false DCI.
    valid = 0;
    pucch_res_set_cnt = mac->ULbwp[0]->bwp_Dedicated->pucch_Config->choice.setup->resourceSetToAddModList->list.count;
    for (int id = 0; id < pucch_res_set_cnt; id++) {
      if (dlsch_config_pdu_1_0->pucch_resource_id < mac->ULbwp[0]->bwp_Dedicated->pucch_Config->choice.setup->resourceSetToAddModList->list.array[id]->resourceList.list.count) {
        valid = 1;
        break;
      }
    }
    if (!valid) {
      LOG_W(MAC, "[%d.%d] pucch_resource_indicator value %d is out of bounds. Possibly due to false DCI. Ignoring DCI!\n", frame, slot, dlsch_config_pdu_1_0->pucch_resource_id);
      return -1;
    }

    /* PDSCH_TO_HARQ_FEEDBACK_TIME_IND (only if CRC scrambled by C-RNTI or CS-RNTI or new-RNTI)*/
    dlsch_config_pdu_1_0->pdsch_to_harq_feedback_time_ind = dci->pdsch_to_harq_feedback_timing_indicator.val;

    LOG_D(MAC,"(nr_ue_procedures.c) rnti = %x dl_config->number_pdus = %d\n",
	  dl_config->dl_config_list[dl_config->number_pdus].dlsch_config_pdu.rnti,
	  dl_config->number_pdus);
    LOG_D(MAC,"(nr_ue_procedures.c) frequency_domain_resource_assignment=%d \t number_rbs=%d \t start_rb=%d\n",
	  dci->frequency_domain_assignment.val,
	  dlsch_config_pdu_1_0->number_rbs,
	  dlsch_config_pdu_1_0->start_rb);
    LOG_D(MAC,"(nr_ue_procedures.c) time_domain_resource_assignment=%d \t number_symbols=%d \t start_symbol=%d\n",
	  dci->time_domain_assignment.val,
	  dlsch_config_pdu_1_0->number_symbols,
	  dlsch_config_pdu_1_0->start_symbol);
    LOG_D(MAC,"(nr_ue_procedures.c) vrb_to_prb_mapping=%d \n>>> mcs=%d\n>>> ndi=%d\n>>> rv=%d\n>>> harq_process_nbr=%d\n>>> dai=%d\n>>> scaling_factor_S=%f\n>>> tpc_pucch=%d\n>>> pucch_res_ind=%d\n>>> pdsch_to_harq_feedback_time_ind=%d\n",
	  dlsch_config_pdu_1_0->vrb_to_prb_mapping,
	  dlsch_config_pdu_1_0->mcs,
	  dlsch_config_pdu_1_0->ndi,
	  dlsch_config_pdu_1_0->rv,
	  dlsch_config_pdu_1_0->harq_process_nbr,
	  dlsch_config_pdu_1_0->dai,
	  dlsch_config_pdu_1_0->scaling_factor_S,
	  dlsch_config_pdu_1_0->accumulated_delta_PUCCH,
	  dlsch_config_pdu_1_0->pucch_resource_id,
	  dlsch_config_pdu_1_0->pdsch_to_harq_feedback_time_ind);

    //	    dl_config->dl_config_list[dl_config->number_pdus].dci_config_pdu.dci_config_rel15.N_RB_BWP = n_RB_DLBWP;
	    
    LOG_D(MAC,"(nr_ue_procedures.c) pdu_type=%d\n\n",dl_config->dl_config_list[dl_config->number_pdus].pdu_type);
            
    dl_config->number_pdus = dl_config->number_pdus + 1;
    break;
  }

  case NR_DL_DCI_FORMAT_1_1: {
    /*
     *  with CRC scrambled by C-RNTI or CS-RNTI or new-RNTI
     *    0  IDENTIFIER_DCI_FORMATS:
     *    1  CARRIER_IND:
     *    7  BANDWIDTH_PART_IND:
     *    11 FREQ_DOM_RESOURCE_ASSIGNMENT_DL:
     *    12 TIME_DOM_RESOURCE_ASSIGNMENT: 0, 1, 2, 3, or 4 bits as defined in Subclause 5.1.2.1 of [6, TS 38.214]. The bitwidth for this field is determined as log2(I) bits,
     *    13 VRB_TO_PRB_MAPPING: 0 bit if only resource allocation type 0
     *    14 PRB_BUNDLING_SIZE_IND:
     *    15 RATE_MATCHING_IND:
     *    16 ZP_CSI_RS_TRIGGER:
     *    18 TB1_MCS:
     *    19 TB1_NDI:
     *    20 TB1_RV:
     *    21 TB2_MCS:
     *    22 TB2_NDI:
     *    23 TB2_RV:
     *    27 HARQ_PROCESS_NUMBER:
     *    28 DAI_: For format1_1: 4 if more than one serving cell are configured in the DL and the higher layer parameter HARQ-ACK-codebook=dynamic, where the 2 MSB bits are the counter DAI and the 2 LSB bits are the total DAI
     *    33 TPC_PUCCH:
     *    34 PUCCH_RESOURCE_IND:
     *    35 PDSCH_TO_HARQ_FEEDBACK_TIME_IND:
     *    38 ANTENNA_PORTS:
     *    39 TCI:
     *    40 SRS_REQUEST:
     *    43 CBGTI:
     *    44 CBGFI:
     *    47 DMRS_SEQ_INI:
     */

    if (dci->bwp_indicator.val != 1) {
      LOG_W(MAC, "[%d.%d] bwp_indicator != 1! Possibly due to false DCI. Ignoring DCI!\n", frame, slot);
      return -1;
    }
    config_bwp_ue(mac, &dci->bwp_indicator.val, &dci_format);
    NR_BWP_Id_t dl_bwp_id = mac->DL_BWP_Id;
    NR_PDSCH_Config_t *pdsch_config=mac->DLbwp[dl_bwp_id-1]->bwp_Dedicated->pdsch_Config->choice.setup;

    dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_DLSCH;
    dl_config->dl_config_list[dl_config->number_pdus].dlsch_config_pdu.rnti = rnti;
    fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu_1_1 = &dl_config->dl_config_list[dl_config->number_pdus].dlsch_config_pdu.dlsch_config_rel15;
    /* IDENTIFIER_DCI_FORMATS */
    /* CARRIER_IND */
    /* BANDWIDTH_PART_IND */
    //    dlsch_config_pdu_1_1->bandwidth_part_ind = dci->bandwidth_part_ind;
    /* FREQ_DOM_RESOURCE_ASSIGNMENT_DL */
    if (nr_ue_process_dci_freq_dom_resource_assignment(NULL,dlsch_config_pdu_1_1,0,n_RB_DLBWP,dci->frequency_domain_assignment.val) < 0) {
      LOG_W(MAC, "[%d.%d] Invalid frequency_domain_assignment. Possibly due to false DCI. Ignoring DCI!\n", frame, slot);
      return -1;
    }
    /* TIME_DOM_RESOURCE_ASSIGNMENT */
    if (nr_ue_process_dci_time_dom_resource_assignment(mac,NULL,dlsch_config_pdu_1_1,dci->time_domain_assignment.val) < 0) {
      LOG_W(MAC, "[%d.%d] Invalid time_domain_assignment. Possibly due to false DCI. Ignoring DCI!\n", frame, slot);
      return -1;
    }
    /* dmrs symbol positions*/
    dlsch_config_pdu_1_1->dlDmrsSymbPos = fill_dmrs_mask(pdsch_config,
							 mac->scc->dmrs_TypeA_Position,
							 dlsch_config_pdu_1_1->number_symbols);
    dlsch_config_pdu_1_1->dmrsConfigType = mac->DLbwp[dl_bwp_id-1]->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->dmrs_Type == NULL ? 0 : 1;
    /* TODO: fix number of DM-RS CDM groups without data according to subclause 5.1.6.2 of 3GPP TS 38.214,
             using tables 7.3.1.2.2-1, 7.3.1.2.2-2, 7.3.1.2.2-3, 7.3.1.2.2-4 of 3GPP TS 38.212 */
    dlsch_config_pdu_1_1->n_dmrs_cdm_groups = 1;
    /* VRB_TO_PRB_MAPPING */
    if (mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.resource_allocation != 0)
      dlsch_config_pdu_1_1->vrb_to_prb_mapping = (dci->vrb_to_prb_mapping.val == 0) ? vrb_to_prb_mapping_non_interleaved:vrb_to_prb_mapping_interleaved;
    /* PRB_BUNDLING_SIZE_IND */
    dlsch_config_pdu_1_1->prb_bundling_size_ind = dci->prb_bundling_size_indicator.val;
    /* RATE_MATCHING_IND */
    dlsch_config_pdu_1_1->rate_matching_ind = dci->rate_matching_indicator.val;
    /* ZP_CSI_RS_TRIGGER */
    dlsch_config_pdu_1_1->zp_csi_rs_trigger = dci->zp_csi_rs_trigger.val;
    /* MCS (for transport block 1)*/
    dlsch_config_pdu_1_1->mcs = dci->mcs;
    // Basic sanity check for MCS value to check for a false or erroneous DCI
    if (dlsch_config_pdu_1_1->mcs > 28) {
      LOG_W(MAC, "[%d.%d] MCS value %d out of bounds! Possibly due to false DCI. Ignoring DCI!\n", frame, slot, dlsch_config_pdu_1_1->mcs);
      return -1;
    }
    /* NDI (for transport block 1)*/
    dlsch_config_pdu_1_1->ndi = dci->ndi;
    /* RV (for transport block 1)*/
    dlsch_config_pdu_1_1->rv = dci->rv;
    /* MCS (for transport block 2)*/
    dlsch_config_pdu_1_1->tb2_mcs = dci->mcs2.val;
    // Basic sanity check for MCS value to check for a false or erroneous DCI
    if (dlsch_config_pdu_1_1->tb2_mcs > 28) {
      LOG_W(MAC, "[%d.%d] MCS value %d out of bounds! Possibly due to false DCI. Ignoring DCI!\n", frame, slot, dlsch_config_pdu_1_1->tb2_mcs);
      return -1;
    }
    /* NDI (for transport block 2)*/
    dlsch_config_pdu_1_1->tb2_ndi = dci->ndi2.val;
    /* RV (for transport block 2)*/
    dlsch_config_pdu_1_1->tb2_rv = dci->rv2.val;
    /* HARQ_PROCESS_NUMBER */
    dlsch_config_pdu_1_1->harq_process_nbr = dci->harq_pid;
    /* DAI */
    dlsch_config_pdu_1_1->dai = dci->dai[0].val;
    /* TPC_PUCCH */
    // according to TS 38.213 Table 7.2.1-1
    if (dci->tpc == 0) dlsch_config_pdu_1_1->accumulated_delta_PUCCH = -1;
    if (dci->tpc == 1) dlsch_config_pdu_1_1->accumulated_delta_PUCCH = 0;
    if (dci->tpc == 2) dlsch_config_pdu_1_1->accumulated_delta_PUCCH = 1;
    if (dci->tpc == 3) dlsch_config_pdu_1_1->accumulated_delta_PUCCH = 3;
    /* PUCCH_RESOURCE_IND */
    dlsch_config_pdu_1_1->pucch_resource_id = dci->pucch_resource_indicator;
    // Sanity check for pucch_resource_indicator value received to check for false DCI.
    valid = 0;
    pucch_res_set_cnt = mac->ULbwp[0]->bwp_Dedicated->pucch_Config->choice.setup->resourceSetToAddModList->list.count;
    for (int id = 0; id < pucch_res_set_cnt; id++) {
      if (dlsch_config_pdu_1_1->pucch_resource_id < mac->ULbwp[0]->bwp_Dedicated->pucch_Config->choice.setup->resourceSetToAddModList->list.array[id]->resourceList.list.count) {
        valid = 1;
        break;
      }
    }
    if (!valid) {
      LOG_W(MAC, "[%d.%d] pucch_resource_indicator value %d is out of bounds. Possibly due to false DCI. Ignoring DCI!\n", frame, slot, dlsch_config_pdu_1_1->pucch_resource_id);
      return -1;
    }

    /* PDSCH_TO_HARQ_FEEDBACK_TIME_IND */
    // according to TS 38.213 Table 9.2.3-1
    NR_BWP_Id_t ul_bwp_id = mac->UL_BWP_Id;
    dlsch_config_pdu_1_1->pdsch_to_harq_feedback_time_ind = mac->ULbwp[ul_bwp_id-1]->bwp_Dedicated->pucch_Config->choice.setup->dl_DataToUL_ACK->list.array[dci->pdsch_to_harq_feedback_timing_indicator.val][0];
    /* ANTENNA_PORTS */
    uint8_t n_codewords = 1; // FIXME!!!
    if ((mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.dmrs_type == 1) &&
	(mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.max_length == 1)){
      // Table 7.3.1.2.2-1: Antenna port(s) (1000 + DMRS port), dmrs-Type=1, maxLength=1
      dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_1[dci->antenna_ports.val][0];
      dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_1[dci->antenna_ports.val][1];
      dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_1[dci->antenna_ports.val][2];
      dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_1[dci->antenna_ports.val][3];
      dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_1[dci->antenna_ports.val][4];
    }
    if ((mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.dmrs_type == 1) &&
	(mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.max_length == 2)){
      // Table 7.3.1.2.2-2: Antenna port(s) (1000 + DMRS port), dmrs-Type=1, maxLength=2
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][4];
	dlsch_config_pdu_1_1->n_front_load_symb = table_7_3_2_3_3_2_oneCodeword[dci->antenna_ports.val][5];
      }
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][4];
	dlsch_config_pdu_1_1->dmrs_ports[4]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][5];
	dlsch_config_pdu_1_1->dmrs_ports[5]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][6];
	dlsch_config_pdu_1_1->dmrs_ports[6]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][7];
	dlsch_config_pdu_1_1->dmrs_ports[7]     = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][8];
	dlsch_config_pdu_1_1->n_front_load_symb = table_7_3_2_3_3_2_twoCodeword[dci->antenna_ports.val][9];
      }
    }
    if ((mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.dmrs_type == 2) &&
	(mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.max_length == 1)){
      // Table 7.3.1.2.2-3: Antenna port(s) (1000 + DMRS port), dmrs-Type=2, maxLength=1
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_3_oneCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_3_oneCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_3_oneCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_3_oneCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_3_oneCodeword[dci->antenna_ports.val][4];
      }
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][4];
	dlsch_config_pdu_1_1->dmrs_ports[4]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][5];
	dlsch_config_pdu_1_1->dmrs_ports[5]     = table_7_3_2_3_3_3_twoCodeword[dci->antenna_ports.val][6];
      }
    }
    if ((mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.dmrs_type == 2) &&
	(mac->phy_config.config_req.dl_bwp_dedicated.pdsch_config_dedicated.dmrs_dl_for_pdsch_mapping_type_a.max_length == 2)){
      // Table 7.3.1.2.2-4: Antenna port(s) (1000 + DMRS port), dmrs-Type=2, maxLength=2
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][4];
	dlsch_config_pdu_1_1->n_front_load_symb = table_7_3_2_3_3_4_oneCodeword[dci->antenna_ports.val][5];
      }
      if (n_codewords == 1) {
	dlsch_config_pdu_1_1->n_dmrs_cdm_groups = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][0];
	dlsch_config_pdu_1_1->dmrs_ports[0]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][1];
	dlsch_config_pdu_1_1->dmrs_ports[1]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][2];
	dlsch_config_pdu_1_1->dmrs_ports[2]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][3];
	dlsch_config_pdu_1_1->dmrs_ports[3]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][4];
	dlsch_config_pdu_1_1->dmrs_ports[4]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][5];
	dlsch_config_pdu_1_1->dmrs_ports[5]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][6];
	dlsch_config_pdu_1_1->dmrs_ports[6]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][7];
	dlsch_config_pdu_1_1->dmrs_ports[7]     = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][8];
	dlsch_config_pdu_1_1->n_front_load_symb = table_7_3_2_3_3_4_twoCodeword[dci->antenna_ports.val][9];
      }
    }
    /* TCI */
    if (mac->dl_config_request.dl_config_list[0].dci_config_pdu.dci_config_rel15.coreset.tci_present_in_dci == 1){
      // 0 bit if higher layer parameter tci-PresentInDCI is not enabled
      // otherwise 3 bits as defined in Subclause 5.1.5 of [6, TS38.214]
      dlsch_config_pdu_1_1->tci_state = dci->transmission_configuration_indication.val;
    }
    /* SRS_REQUEST */
    // if SUL is supported in the cell, there is an additional bit in this field and the value of this bit represents table 7.1.1.1-1 TS 38.212 FIXME!!!
    dlsch_config_pdu_1_1->srs_config.aperiodicSRS_ResourceTrigger = (dci->srs_request.val & 0x11); // as per Table 7.3.1.1.2-24 TS 38.212
    /* CBGTI */
    dlsch_config_pdu_1_1->cbgti = dci->cbgti.val;
    /* CBGFI */
    dlsch_config_pdu_1_1->codeBlockGroupFlushIndicator = dci->cbgfi.val;
    /* DMRS_SEQ_INI */
    //FIXME!!!

    //	    dl_config->dl_config_list[dl_config->number_pdus].dci_config_pdu.dci_config_rel15.N_RB_BWP = n_RB_DLBWP;
	    
    dl_config->dl_config_list[dl_config->number_pdus].pdu_type = FAPI_NR_DL_CONFIG_TYPE_DLSCH;
    LOG_D(MAC,"(nr_ue_procedures.c) pdu_type=%d\n\n",dl_config->dl_config_list[dl_config->number_pdus].pdu_type);
            
    dl_config->number_pdus = dl_config->number_pdus + 1;
    /* TODO same calculation for MCS table as done in UL */
    dlsch_config_pdu_1_1->mcs_table = (pdsch_config->mcs_Table) ? (*pdsch_config->mcs_Table + 1) : 0;
    /*PTRS configuration */
    if(mac->DLbwp[dl_bwp_id-1]->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->phaseTrackingRS != NULL) {
      valid_ptrs_setup = set_dl_ptrs_values(mac->DLbwp[dl_bwp_id-1]->bwp_Dedicated->pdsch_Config->choice.setup->dmrs_DownlinkForPDSCH_MappingTypeA->choice.setup->phaseTrackingRS->choice.setup,
                                            dlsch_config_pdu_1_1->number_rbs, dlsch_config_pdu_1_1->mcs, dlsch_config_pdu_1_1->mcs_table,
                                            &dlsch_config_pdu_1_1->PTRSFreqDensity,&dlsch_config_pdu_1_1->PTRSTimeDensity,
                                            &dlsch_config_pdu_1_1->PTRSPortIndex,&dlsch_config_pdu_1_1->nEpreRatioOfPDSCHToPTRS,
                                            &dlsch_config_pdu_1_1->PTRSReOffset, dlsch_config_pdu_1_1->number_symbols);
      if(valid_ptrs_setup==true) {
        dlsch_config_pdu_1_1->pduBitmap |= 0x1;
      }
    }

    break;
  }

  case NR_DL_DCI_FORMAT_2_0:
    break;

  case NR_DL_DCI_FORMAT_2_1:        
    break;

  case NR_DL_DCI_FORMAT_2_2:        
    break;

  case NR_DL_DCI_FORMAT_2_3:
    break;

  default: 
    break;
  }


  if(rnti == SI_RNTI){

    //    }else if(rnti == mac->ra_rnti){

  }else if(rnti == P_RNTI){

  }else{  //  c-rnti

    ///  check if this is pdcch order 
    //dci->random_access_preamble_index;
    //dci->ss_pbch_index;
    //dci->prach_mask_index;

    ///  else normal DL-SCH grant
  }

  return ret;

}

int8_t nr_ue_get_SR(module_id_t module_idP, int CC_id, frame_t frameP, uint8_t eNB_id, uint16_t rnti, sub_frame_t subframe){

  return 0;
}

void nr_ue_send_sdu(nr_downlink_indication_t *dl_info, NR_UL_TIME_ALIGNMENT_t *ul_time_alignment, int pdu_id){

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_IN);

  #if defined(ENABLE_MAC_PAYLOAD_DEBUG)
    LOG_T(MAC, "[UE %d] First 32 bytes of DLSCH : \n", module_idP);
    for (i = 0; i < 32; i++) {
      LOG_T(MAC, "%x.", sdu[i]);
    }
    LOG_T(MAC, "\n");
  #endif

  LOG_D(MAC, "In %s [%d.%d] Handling DLSCH PDU...\n", __FUNCTION__, dl_info->frame, dl_info->slot);

  // Processing MAC PDU
  // it parses MAC CEs subheaders, MAC CEs, SDU subheaderds and SDUs
  switch (dl_info->rx_ind->rx_indication_body[pdu_id].pdu_type){
    case FAPI_NR_RX_PDU_TYPE_DLSCH:
    nr_ue_process_mac_pdu(dl_info, ul_time_alignment, pdu_id);
    break;
    case FAPI_NR_RX_PDU_TYPE_RAR:
    nr_ue_process_rar(dl_info, ul_time_alignment, pdu_id);
    break;
    default:
    break;
  }

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_SEND_SDU, VCD_FUNCTION_OUT);

}

// N_RB configuration according to 7.3.1.0 (DCI size alignment) of TS 38.212
int get_n_rb(NR_UE_MAC_INST_t *mac, int rnti_type){

  int N_RB = 0, start_RB;
  switch(rnti_type) {
    case NR_RNTI_RA:
    case NR_RNTI_TC:
    case NR_RNTI_P: {
      NR_BWP_Id_t dl_bwp_id = mac->DL_BWP_Id;
      if (mac->DLbwp[dl_bwp_id-1]->bwp_Common->pdcch_ConfigCommon->choice.setup->controlResourceSetZero) {
        uint8_t coreset_id = 0; // assuming controlResourceSetId is 0 for controlResourceSetZero
        NR_ControlResourceSet_t *coreset = mac->coreset[dl_bwp_id-1][coreset_id];
        get_coreset_rballoc(coreset->frequencyDomainResources.buf,&N_RB,&start_RB);
      } else {
        N_RB = NRRIV2BW(mac->scc->downlinkConfigCommon->initialDownlinkBWP->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
      }
      break;
    }
    case NR_RNTI_SI:
      N_RB = mac->type0_PDCCH_CSS_config.num_rbs;
      break;
    case NR_RNTI_C:
      N_RB = NRRIV2BW(mac->DLbwp[0]->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
      break;
  }
  return N_RB;

}

uint8_t nr_extract_dci_info(NR_UE_MAC_INST_t *mac,
			 uint8_t dci_format,
			 uint8_t dci_size,
			 uint16_t rnti,
			 uint64_t *dci_pdu,
			 dci_pdu_rel15_t *dci_pdu_rel15) {

  int rnti_type = get_rnti_type(mac, rnti);

  AssertFatal(mac->DLbwp[0] != NULL, "DLbwp[0] shouldn't be null here!\n");
  AssertFatal(mac->ULbwp[0] != NULL, "ULbwp[0] shouldn't be null here!\n");
  int N_RB = get_n_rb(mac, rnti_type);
  int N_RB_UL = (mac->scg != NULL) ? 
    NRRIV2BW(mac->ULbwp[0]->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE) :
    NRRIV2BW(mac->scc->uplinkConfigCommon->initialUplinkBWP->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);

  int pos=0;
  int fsize=0;

  if (rnti_type == NR_RNTI_C) {
    // First find out the DCI format from the first bit (UE performed blind decoding)
    pos++;
    dci_pdu_rel15->format_indicator = (*dci_pdu>>(dci_size-pos))&1;
#ifdef DEBUG_EXTRACT_DCI
    LOG_D(MAC,"Format indicator %d (%d bits) N_RB_BWP %d => %d (0x%lx)\n",dci_pdu_rel15->format_indicator,1,N_RB,dci_size-pos,*dci_pdu);
#endif

    if (dci_format == NR_UL_DCI_FORMAT_0_0 || dci_format == NR_DL_DCI_FORMAT_1_0) {
      if (dci_pdu_rel15->format_indicator == 0) 
        dci_format = NR_UL_DCI_FORMAT_0_0;
      else
        dci_format = NR_DL_DCI_FORMAT_1_0;
    }
    else if (dci_format == NR_UL_DCI_FORMAT_0_1 || dci_format == NR_DL_DCI_FORMAT_1_1) {
      // In case the sizes of formats 0_1 and 1_1 happen to be the same
      if (dci_pdu_rel15->format_indicator == 0) 
        dci_format = NR_UL_DCI_FORMAT_0_1;
      else
        dci_format = NR_DL_DCI_FORMAT_1_1;
    }
  }
#ifdef DEBUG_EXTRACT_DCI
  LOG_D(MAC, "DCI format is %d\n", dci_format);
#endif
  
  switch(dci_format) {

  case NR_DL_DCI_FORMAT_1_0:
    switch(rnti_type) {
    case NR_RNTI_RA:
      // Freq domain assignment
      fsize = (int)ceil( log2( (N_RB*(N_RB+1))>>1 ) );
      pos=fsize;
      dci_pdu_rel15->frequency_domain_assignment.val = *dci_pdu>>(dci_size-pos)&((1<<fsize)-1);
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"frequency-domain assignment %d (%d bits) N_RB_BWP %d=> %d (0x%lx)\n",dci_pdu_rel15->frequency_domain_assignment.val,fsize,N_RB,dci_size-pos,*dci_pdu);
#endif
      // Time domain assignment
      pos+=4;
      dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu >> (dci_size-pos))&0xf;
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"time-domain assignment %d  (4 bits)=> %d (0x%lx)\n",dci_pdu_rel15->time_domain_assignment.val,dci_size-pos,*dci_pdu);
#endif
      // VRB to PRB mapping
	
      pos++;
      dci_pdu_rel15->vrb_to_prb_mapping.val = (*dci_pdu>>(dci_size-pos))&0x1;
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"vrb to prb mapping %d  (1 bits)=> %d (0x%lx)\n",dci_pdu_rel15->vrb_to_prb_mapping.val,dci_size-pos,*dci_pdu);
#endif
      // MCS
      pos+=5;
      dci_pdu_rel15->mcs = (*dci_pdu>>(dci_size-pos))&0x1f;
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"mcs %d  (5 bits)=> %d (0x%lx)\n",dci_pdu_rel15->mcs,dci_size-pos,*dci_pdu);
#endif
      // TB scaling
      pos+=2;
      dci_pdu_rel15->tb_scaling = (*dci_pdu>>(dci_size-pos))&0x3;
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"tb_scaling %d  (2 bits)=> %d (0x%lx)\n",dci_pdu_rel15->tb_scaling,dci_size-pos,*dci_pdu);
#endif
      break;

    case NR_RNTI_C:
	
      // Freq domain assignment (275rb >> fsize = 16)
      fsize = (int)ceil( log2( (N_RB*(N_RB+1))>>1 ) );
      pos+=fsize;
      dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<fsize)-1);
  	
#ifdef DEBUG_EXTRACT_DCI
      LOG_D(MAC,"Freq domain assignment %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->frequency_domain_assignment.val,fsize,dci_size-pos,*dci_pdu);
#endif
    	
      uint16_t is_ra = 1;
      for (int i=0; i<fsize; i++)
	if (!((dci_pdu_rel15->frequency_domain_assignment.val>>i)&1)) {
	  is_ra = 0;
	  break;
	}
      if (is_ra) //fsize are all 1  38.212 p86
	{
	  // ra_preamble_index 6 bits
	  pos+=6;
	  dci_pdu_rel15->ra_preamble_index = (*dci_pdu>>(dci_size-pos))&0x3f;
	    
	  // UL/SUL indicator  1 bit
	  pos++;
	  dci_pdu_rel15->ul_sul_indicator.val = (*dci_pdu>>(dci_size-pos))&1;
	    
	  // SS/PBCH index  6 bits
	  pos+=6;
	  dci_pdu_rel15->ss_pbch_index = (*dci_pdu>>(dci_size-pos))&0x3f;
	    
	  //  prach_mask_index  4 bits
	  pos+=4;
	  dci_pdu_rel15->prach_mask_index = (*dci_pdu>>(dci_size-pos))&0xf;
	    
	}  //end if
      else {
	  
	// Time domain assignment 4bit
		  
	pos+=4;
	dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&0xf;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"Time domain assignment %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->time_domain_assignment.val,4,dci_size-pos,*dci_pdu);
#endif
	  
	// VRB to PRB mapping  1bit
	pos++;
	dci_pdu_rel15->vrb_to_prb_mapping.val = (*dci_pdu>>(dci_size-pos))&1;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"VRB to PRB %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->vrb_to_prb_mapping.val,1,dci_size-pos,*dci_pdu);
#endif
	
	// MCS 5bit  //bit over 32, so dci_pdu ++
	pos+=5;
	dci_pdu_rel15->mcs = (*dci_pdu>>(dci_size-pos))&0x1f;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"MCS %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->mcs,5,dci_size-pos,*dci_pdu);
#endif
	  
	// New data indicator 1bit
	pos++;
	dci_pdu_rel15->ndi = (*dci_pdu>>(dci_size-pos))&1;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"NDI %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->ndi,1,dci_size-pos,*dci_pdu);
#endif      
	  
	// Redundancy version  2bit
	pos+=2;
	dci_pdu_rel15->rv = (*dci_pdu>>(dci_size-pos))&0x3;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"RV %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->rv,2,dci_size-pos,*dci_pdu);
#endif
	  
	// HARQ process number  4bit
	pos+=4;
	dci_pdu_rel15->harq_pid  = (*dci_pdu>>(dci_size-pos))&0xf;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"HARQ_PID %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->harq_pid,4,dci_size-pos,*dci_pdu);
#endif
	  
	// Downlink assignment index  2bit
	pos+=2;
	dci_pdu_rel15->dai[0].val = (*dci_pdu>>(dci_size-pos))&3;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"DAI %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->dai[0].val,2,dci_size-pos,*dci_pdu);
#endif
	  
	// TPC command for scheduled PUCCH  2bit
	pos+=2;
	dci_pdu_rel15->tpc = (*dci_pdu>>(dci_size-pos))&3;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"TPC %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->tpc,2,dci_size-pos,*dci_pdu);
#endif
	  
	// PUCCH resource indicator  3bit
	pos+=3;
	dci_pdu_rel15->pucch_resource_indicator = (*dci_pdu>>(dci_size-pos))&0x7;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"PUCCH RI %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->pucch_resource_indicator,3,dci_size-pos,*dci_pdu);
#endif
	  
	// PDSCH-to-HARQ_feedback timing indicator 3bit
	pos+=3;
	dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.val = (*dci_pdu>>(dci_size-pos))&0x7;
#ifdef DEBUG_EXTRACT_DCI
	LOG_D(MAC,"PDSCH to HARQ TI %d (%d bits)=> %d (0x%lx)\n",dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.val,3,dci_size-pos,*dci_pdu);
#endif
	  
      } //end else
      break;
    	
    case NR_RNTI_P:
      /*
      // Short Messages Indicator  E2 bits
      for (int i=0; i<2; i++)
      dci_pdu |= (((uint64_t)dci_pdu_rel15->short_messages_indicator>>(1-i))&1)<<(dci_size-pos++);
      // Short Messages  E8 bits
      for (int i=0; i<8; i++)
      *dci_pdu |= (((uint64_t)dci_pdu_rel15->short_messages>>(7-i))&1)<<(dci_size-pos++);
      // Freq domain assignment 0-16 bit
      fsize = (int)ceil( log2( (N_RB*(N_RB+1))>>1 ) );
      for (int i=0; i<fsize; i++)
      *dci_pdu |= (((uint64_t)dci_pdu_rel15->frequency_domain_assignment>>(fsize-i-1))&1)<<(dci_size-pos++);
      // Time domain assignment 4 bit
      for (int i=0; i<4; i++)
      *dci_pdu |= (((uint64_t)dci_pdu_rel15->time_domain_assignment>>(3-i))&1)<<(dci_size-pos++);
      // VRB to PRB mapping 1 bit
      *dci_pdu |= ((uint64_t)dci_pdu_rel15->vrb_to_prb_mapping.val&1)<<(dci_size-pos++);
      // MCS 5 bit
      for (int i=0; i<5; i++)
      *dci_pdu |= (((uint64_t)dci_pdu_rel15->mcs>>(4-i))&1)<<(dci_size-pos++);
	
      // TB scaling 2 bit
      for (int i=0; i<2; i++)
      *dci_pdu |= (((uint64_t)dci_pdu_rel15->tb_scaling>>(1-i))&1)<<(dci_size-pos++);
      */	
	
      break;
  	
    case NR_RNTI_SI:

        // Freq domain assignment 0-16 bit
        fsize = (int)ceil( log2( (N_RB*(N_RB+1))>>1 ) );
        pos+=fsize;
        dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<fsize)-1);

        // Time domain assignment 4 bit
        pos+=4;
        dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&0xf;

        // VRB to PRB mapping 1 bit
        pos++;
        dci_pdu_rel15->vrb_to_prb_mapping.val = (*dci_pdu>>(dci_size-pos))&0x1;

        // MCS 5bit  //bit over 32, so dci_pdu ++
        pos+=5;
        dci_pdu_rel15->mcs = (*dci_pdu>>(dci_size-pos))&0x1f;

        // Redundancy version  2 bit
        pos+=2;
        dci_pdu_rel15->rv = (*dci_pdu>>(dci_size-pos))&3;

        // System information indicator 1 bit
        pos++;
        dci_pdu_rel15->system_info_indicator = (*dci_pdu>>(dci_size-pos))&0x1;

        LOG_D(MAC,"N_RB = %i\n", N_RB);
        LOG_D(MAC,"dci_size = %i\n", dci_size);
        LOG_D(MAC,"fsize = %i\n", fsize);
        LOG_D(MAC,"dci_pdu_rel15->frequency_domain_assignment.val = %i\n", dci_pdu_rel15->frequency_domain_assignment.val);
        LOG_D(MAC,"dci_pdu_rel15->time_domain_assignment.val = %i\n", dci_pdu_rel15->time_domain_assignment.val);
        LOG_D(MAC,"dci_pdu_rel15->vrb_to_prb_mapping.val = %i\n", dci_pdu_rel15->vrb_to_prb_mapping.val);
        LOG_D(MAC,"dci_pdu_rel15->mcs = %i\n", dci_pdu_rel15->mcs);
        LOG_D(MAC,"dci_pdu_rel15->rv = %i\n", dci_pdu_rel15->rv);
        LOG_D(MAC,"dci_pdu_rel15->system_info_indicator = %i\n", dci_pdu_rel15->system_info_indicator);

      break;
	
    case NR_RNTI_TC:
      // indicating a DL DCI format 1bit
      pos++;
      dci_pdu_rel15->format_indicator = (*dci_pdu>>(dci_size-pos))&1;
      // Freq domain assignment 0-16 bit
      fsize = (int)ceil( log2( (N_RB*(N_RB+1))>>1 ) );
      pos+=fsize;
      dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<fsize)-1);
      // Time domain assignment 4 bit
      pos+=4;
      dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&0xf;
      // VRB to PRB mapping 1 bit
      dci_pdu_rel15->vrb_to_prb_mapping.val = (*dci_pdu>>(dci_size-pos))&1;
      // MCS 5bit  //bit over 32, so dci_pdu ++
      pos+=5;
      dci_pdu_rel15->mcs = (*dci_pdu>>(dci_size-pos))&0x1f;
      // New data indicator 1bit
      dci_pdu_rel15->ndi = (*dci_pdu>>(dci_size-pos))&1;
      // Redundancy version  2bit
      pos+=2;
      dci_pdu_rel15->rv = (*dci_pdu>>(dci_size-pos))&3;
      // HARQ process number  4bit
      pos+=4;
      dci_pdu_rel15->harq_pid = (*dci_pdu>>(dci_size-pos))&0xf;
      // Downlink assignment index  E2 bits
      pos+=2;
      dci_pdu_rel15->dai[0].val = (*dci_pdu>>(dci_size-pos))&3;
      // TPC command for scheduled PUCCH  E2 bits
      pos+=2;
      dci_pdu_rel15->tpc  = (*dci_pdu>>(dci_size-pos))&3;
      // PDSCH-to-HARQ_feedback timing indicator  E3 bits
      pos+=3;
      dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.val = (*dci_pdu>>(dci_size-pos))&7;
       
      break;
    }
    break;
  
  case NR_UL_DCI_FORMAT_0_0:
    switch(rnti_type)
      {
      case NR_RNTI_C:
	fsize = (int)ceil( log2( (N_RB_UL*(N_RB_UL+1))>>1 ) );
	pos+=fsize;
	dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<fsize)-1);
	// Time domain assignment 4bit
	pos+=4;
	dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&0xf;
	// Frequency hopping flag  E1 bit
	pos++;
	dci_pdu_rel15->frequency_hopping_flag.val= (*dci_pdu>>(dci_size-pos))&1;
	// MCS  5 bit
	pos+=5;
	dci_pdu_rel15->mcs= (*dci_pdu>>(dci_size-pos))&0x1f;
	// New data indicator 1bit
	pos++;
	dci_pdu_rel15->ndi= (*dci_pdu>>(dci_size-pos))&1;
	// Redundancy version  2bit
	pos+=2;
	dci_pdu_rel15->rv= (*dci_pdu>>(dci_size-pos))&3;
	// HARQ process number  4bit
	pos+=4;
	dci_pdu_rel15->harq_pid = (*dci_pdu>>(dci_size-pos))&0xf;
	// TPC command for scheduled PUSCH  E2 bits
	pos+=2;
	dci_pdu_rel15->tpc = (*dci_pdu>>(dci_size-pos))&3;
	// UL/SUL indicator  E1 bit
	/* commented for now (RK): need to get this from BWP descriptor
	   if (cfg->pucch_config.pucch_GroupHopping.value)
	   dci_pdu->= ((uint64_t)*dci_pdu>>(dci_size-pos)ul_sul_indicator&1)<<(dci_size-pos++);
	*/
	break;
	
      case NR_RNTI_TC:
	/*	
	// indicating a DL DCI format 1bit
	dci_pdu->= (*dci_pdu>>(dci_size-pos)format_indicator&1)<<(dci_size-pos++);
	// Freq domain assignment  max 16 bit
	fsize = (int)ceil( log2( (N_RB_UL*(N_RB_UL+1))>>1 ) );
	for (int i=0; i<fsize; i++)
	dci_pdu->= ((*dci_pdu>>(dci_size-pos)frequency_domain_assignment>>(fsize-i-1))&1)<<(dci_size-pos++);
	// Time domain assignment 4bit
	for (int i=0; i<4; i++)
	dci_pdu->= (((uint64_t)*dci_pdu>>(dci_size-pos)time_domain_assignment>>(3-i))&1)<<(dci_size-pos++);
	// Frequency hopping flag  E1 bit
	dci_pdu->= ((uint64_t)*dci_pdu>>(dci_size-pos)frequency_hopping_flag&1)<<(dci_size-pos++);
	// MCS  5 bit
	for (int i=0; i<5; i++)
	dci_pdu->= (((uint64_t)*dci_pdu>>(dci_size-pos)mcs>>(4-i))&1)<<(dci_size-pos++);
	// New data indicator 1bit
	dci_pdu->= ((uint64_t)*dci_pdu>>(dci_size-pos)ndi&1)<<(dci_size-pos++);
	// Redundancy version  2bit
	for (int i=0; i<2; i++)
	dci_pdu->= (((uint64_t)*dci_pdu>>(dci_size-pos)rv>>(1-i))&1)<<(dci_size-pos++);
	// HARQ process number  4bit
	for (int i=0; i<4; i++)
	*dci_pdu  |= (((uint64_t)*dci_pdu>>(dci_size-pos)harq_pid>>(3-i))&1)<<(dci_size-pos++);
	
	// TPC command for scheduled PUSCH  E2 bits
	for (int i=0; i<2; i++)
	dci_pdu->= (((uint64_t)*dci_pdu>>(dci_size-pos)tpc>>(1-i))&1)<<(dci_size-pos++);
	*/	
	// UL/SUL indicator  E1 bit
	/*
	  commented for now (RK): need to get this information from BWP descriptor
	  if (cfg->pucch_config.pucch_GroupHopping.value)
	  dci_pdu->= ((uint64_t)dci_pdu_rel15->ul_sul_indicator&1)<<(dci_size-pos++);
	*/
	break;
	
      }
    break;

  case NR_DL_DCI_FORMAT_1_1:
  switch(rnti_type)
    {
      case NR_RNTI_C:
        // Carrier indicator
        pos+=dci_pdu_rel15->carrier_indicator.nbits;
        dci_pdu_rel15->carrier_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->carrier_indicator.nbits)-1);
        // BWP Indicator
        pos+=dci_pdu_rel15->bwp_indicator.nbits;
        dci_pdu_rel15->bwp_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->bwp_indicator.nbits)-1);
        // Frequency domain resource assignment
        pos+=dci_pdu_rel15->frequency_domain_assignment.nbits;
        dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->frequency_domain_assignment.nbits)-1);
        // Time domain resource assignment
        pos+=dci_pdu_rel15->time_domain_assignment.nbits;
        dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->time_domain_assignment.nbits)-1);
        // VRB-to-PRB mapping
        pos+=dci_pdu_rel15->vrb_to_prb_mapping.nbits;
        dci_pdu_rel15->vrb_to_prb_mapping.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->vrb_to_prb_mapping.nbits)-1);
        // PRB bundling size indicator
        pos+=dci_pdu_rel15->prb_bundling_size_indicator.nbits;
        dci_pdu_rel15->prb_bundling_size_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->prb_bundling_size_indicator.nbits)-1);
        // Rate matching indicator
        pos+=dci_pdu_rel15->rate_matching_indicator.nbits;
        dci_pdu_rel15->rate_matching_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->rate_matching_indicator.nbits)-1);
        // ZP CSI-RS trigger
        pos+=dci_pdu_rel15->zp_csi_rs_trigger.nbits;
        dci_pdu_rel15->zp_csi_rs_trigger.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->zp_csi_rs_trigger.nbits)-1);
        //TB1
        // MCS 5bit
        pos+=5;
        dci_pdu_rel15->mcs = (*dci_pdu>>(dci_size-pos))&0x1f;
        // New data indicator 1bit
        pos+=1;
        dci_pdu_rel15->ndi = (*dci_pdu>>(dci_size-pos))&0x1;
        // Redundancy version  2bit
        pos+=2;
        dci_pdu_rel15->rv = (*dci_pdu>>(dci_size-pos))&0x3;
        //TB2
        // MCS 5bit
        pos+=dci_pdu_rel15->mcs2.nbits;
        dci_pdu_rel15->mcs2.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->mcs2.nbits)-1);
        // New data indicator 1bit
        pos+=dci_pdu_rel15->ndi2.nbits;
        dci_pdu_rel15->ndi2.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->ndi2.nbits)-1);
        // Redundancy version  2bit
        pos+=dci_pdu_rel15->rv2.nbits;
        dci_pdu_rel15->rv2.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->rv2.nbits)-1);
        // HARQ process number  4bit
        pos+=4;
        dci_pdu_rel15->harq_pid = (*dci_pdu>>(dci_size-pos))&0xf;
        // Downlink assignment index
        pos+=dci_pdu_rel15->dai[0].nbits;
        dci_pdu_rel15->dai[0].val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->dai[0].nbits)-1);
        // TPC command for scheduled PUCCH  2bit
        pos+=2;
        dci_pdu_rel15->tpc = (*dci_pdu>>(dci_size-pos))&0x3;
        // PUCCH resource indicator  3bit
        pos+=3;
        dci_pdu_rel15->pucch_resource_indicator = (*dci_pdu>>(dci_size-pos))&0x3;
        // PDSCH-to-HARQ_feedback timing indicator
        pos+=dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.nbits;
        dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->pdsch_to_harq_feedback_timing_indicator.nbits)-1);
        // Antenna ports
        pos+=dci_pdu_rel15->antenna_ports.nbits;
        dci_pdu_rel15->antenna_ports.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->antenna_ports.nbits)-1);
        // TCI
        pos+=dci_pdu_rel15->transmission_configuration_indication.nbits;
        dci_pdu_rel15->transmission_configuration_indication.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->transmission_configuration_indication.nbits)-1);
        // SRS request
        pos+=dci_pdu_rel15->srs_request.nbits;
        dci_pdu_rel15->srs_request.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->srs_request.nbits)-1);
        // CBG transmission information
        pos+=dci_pdu_rel15->cbgti.nbits;
        dci_pdu_rel15->cbgti.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->cbgti.nbits)-1);
        // CBG flushing out information
        pos+=dci_pdu_rel15->cbgfi.nbits;
        dci_pdu_rel15->cbgfi.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->cbgfi.nbits)-1);
        // DMRS sequence init
        pos+=1;
        dci_pdu_rel15->dmrs_sequence_initialization.val = (*dci_pdu>>(dci_size-pos))&0x1;
        break;
      }
      break;

  case NR_UL_DCI_FORMAT_0_1:
    switch(rnti_type)
      {
      case NR_RNTI_C:
        // Carrier indicator
        pos+=dci_pdu_rel15->carrier_indicator.nbits;
        dci_pdu_rel15->carrier_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->carrier_indicator.nbits)-1);
        
        // UL/SUL Indicator
        pos+=dci_pdu_rel15->ul_sul_indicator.nbits;
        dci_pdu_rel15->ul_sul_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->ul_sul_indicator.nbits)-1);
        
        // BWP Indicator
        pos+=dci_pdu_rel15->bwp_indicator.nbits;
        dci_pdu_rel15->bwp_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->bwp_indicator.nbits)-1);

        // Freq domain assignment  max 16 bit
        fsize = (int)ceil( log2( (N_RB_UL*(N_RB_UL+1))>>1 ) );
        //pos+=dci_pdu_rel15->frequency_domain_assignment.nbits;
        pos+=fsize;
        
        //pos+=dci_pdu_rel15->frequency_domain_assignment.nbits;
        dci_pdu_rel15->frequency_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&((1<<fsize)-1);
        
        // Time domain assignment 4bit
        //pos+=4;
        pos+=dci_pdu_rel15->time_domain_assignment.nbits;
        dci_pdu_rel15->time_domain_assignment.val = (*dci_pdu>>(dci_size-pos))&0x3;
        
        // Not supported yet - skip for now
        // Frequency hopping flag – 1 bit 
        //pos++;
        //dci_pdu_rel15->frequency_hopping_flag.val= (*dci_pdu>>(dci_size-pos))&1;

        // MCS  5 bit
        pos+=5;
        dci_pdu_rel15->mcs= (*dci_pdu>>(dci_size-pos))&0x1f;

        // New data indicator 1bit
        pos++;
        dci_pdu_rel15->ndi= (*dci_pdu>>(dci_size-pos))&1;

        // Redundancy version  2bit
        pos+=2;
        dci_pdu_rel15->rv= (*dci_pdu>>(dci_size-pos))&3;

        // HARQ process number  4bit
        pos+=4;
        dci_pdu_rel15->harq_pid = (*dci_pdu>>(dci_size-pos))&0xf;

        // 1st Downlink assignment index
        pos+=dci_pdu_rel15->dai[0].nbits;
        dci_pdu_rel15->dai[0].val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->dai[0].nbits)-1);

        // 2nd Downlink assignment index
        pos+=dci_pdu_rel15->dai[1].nbits;
        dci_pdu_rel15->dai[1].val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->dai[1].nbits)-1);

        // TPC command for scheduled PUSCH – 2 bits
        pos+=2;
        dci_pdu_rel15->tpc = (*dci_pdu>>(dci_size-pos))&3;

        // SRS resource indicator
        pos+=dci_pdu_rel15->srs_resource_indicator.nbits;
        dci_pdu_rel15->srs_resource_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->srs_resource_indicator.nbits)-1);

        // Precoding info and n. of layers
        pos+=dci_pdu_rel15->precoding_information.nbits;
        dci_pdu_rel15->precoding_information.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->precoding_information.nbits)-1);

        // Antenna ports
        pos+=dci_pdu_rel15->antenna_ports.nbits;
        dci_pdu_rel15->antenna_ports.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->antenna_ports.nbits)-1);

        // SRS request
        pos+=dci_pdu_rel15->srs_request.nbits;
        dci_pdu_rel15->srs_request.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->srs_request.nbits)-1);

        // CSI request
        pos+=dci_pdu_rel15->csi_request.nbits;
        dci_pdu_rel15->csi_request.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->csi_request.nbits)-1);

        // CBG transmission information
        pos+=dci_pdu_rel15->cbgti.nbits;
        dci_pdu_rel15->cbgti.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->cbgti.nbits)-1);

        // PTRS DMRS association
        pos+=dci_pdu_rel15->ptrs_dmrs_association.nbits;
        dci_pdu_rel15->ptrs_dmrs_association.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->ptrs_dmrs_association.nbits)-1);

        // Beta offset indicator
        pos+=dci_pdu_rel15->beta_offset_indicator.nbits;
        dci_pdu_rel15->beta_offset_indicator.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->beta_offset_indicator.nbits)-1);

        // DMRS sequence initialization
        pos+=dci_pdu_rel15->dmrs_sequence_initialization.nbits;
        dci_pdu_rel15->dmrs_sequence_initialization.val = (*dci_pdu>>(dci_size-pos))&((1<<dci_pdu_rel15->dmrs_sequence_initialization.nbits)-1);

        // UL-SCH indicator
        pos+=1;
        dci_pdu_rel15->ulsch_indicator = (*dci_pdu>>(dci_size-pos))&0x1;

        // UL/SUL indicator – 1 bit
        /* commented for now (RK): need to get this from BWP descriptor
          if (cfg->pucch_config.pucch_GroupHopping.value)
          dci_pdu->= ((uint64_t)*dci_pdu>>(dci_size-pos)ul_sul_indicator&1)<<(dci_size-pos++);
        */
        break;
      }
    break;
       }
    
    return dci_format;
}

///////////////////////////////////
// brief:     nr_ue_process_mac_pdu
// function:  parsing DL PDU header
///////////////////////////////////
//  Header for DLSCH:
//  Except:
//   - DL-SCH: fixed-size MAC CE(known by LCID)
//   - DL-SCH: padding
//
//  |0|1|2|3|4|5|6|7|  bit-wise
//  |R|F|   LCID    |
//  |       L       |
//  |0|1|2|3|4|5|6|7|  bit-wise
//  |R|F|   LCID    |
//  |       L       |
//  |       L       |
////////////////////////////////
//  Header for DLSCH:
//   - DLSCH: fixed-size MAC CE(known by LCID)
//   - DLSCH: padding, for single/multiple 1-oct padding CE(s)
//
//  |0|1|2|3|4|5|6|7|  bit-wise
//  |R|R|   LCID    |
//  LCID: The Logical Channel ID field identifies the logical channel instance of the corresponding MAC SDU or the type of the corresponding MAC CE or padding as described
//         in Tables 6.2.1-1 and 6.2.1-2 for the DL-SCH and UL-SCH respectively. There is one LCID field per MAC subheader. The LCID field size is 6 bits;
//  L:    The Length field indicates the length of the corresponding MAC SDU or variable-sized MAC CE in bytes. There is one L field per MAC subheader except for subheaders
//         corresponding to fixed-sized MAC CEs and padding. The size of the L field is indicated by the F field;
//  F:    lenght of L is 0:8 or 1:16 bits wide
//  R:    Reserved bit, set to zero.
////////////////////////////////
void nr_ue_process_mac_pdu(nr_downlink_indication_t *dl_info,
                           NR_UL_TIME_ALIGNMENT_t *ul_time_alignment,
                           int pdu_id){

  uint8_t rx_lcid;
  uint16_t mac_ce_len;
  uint16_t mac_subheader_len;
  uint16_t mac_sdu_len;
  module_id_t module_idP = dl_info->module_id;
  frame_t frameP         = dl_info->frame;
  int slot               = dl_info->slot;
  uint8_t *pduP          = (dl_info->rx_ind->rx_indication_body + pdu_id)->pdsch_pdu.pdu;
  uint16_t pdu_len       = (dl_info->rx_ind->rx_indication_body + pdu_id)->pdsch_pdu.pdu_length;
  uint8_t gNB_index      = dl_info->gNB_index;
  uint8_t CC_id          = dl_info->cc_id;
  uint8_t done           = 0;
  NR_UE_MAC_INST_t *mac = get_mac_inst(module_idP);
  RA_config_t *ra = &mac->ra;

  if (!pduP){
    return;
  }

  LOG_D(MAC, "In %s [%d.%d]: processing PDU %d of %d total number of PDUs...\n", __FUNCTION__, frameP, slot, pdu_id, dl_info->rx_ind->number_pdus);

    while (!done && pdu_len > 0){
        mac_ce_len = 0x0000;
        mac_subheader_len = 0x0001; //  default to fixed-length subheader = 1-oct
        mac_sdu_len = 0x0000;
        rx_lcid = ((NR_MAC_SUBHEADER_FIXED *)pduP)->LCID;
	  //#ifdef DEBUG_HEADER_PARSING
              LOG_D(MAC, "[UE] LCID %d, PDU length %d\n", ((NR_MAC_SUBHEADER_FIXED *)pduP)->LCID, pdu_len);
	      //#endif

        LOG_D(MAC, "[UE] LCID %d, PDU length %d\n", rx_lcid, pdu_len);
        switch(rx_lcid){
            //  MAC CE

            case DL_SCH_LCID_CCCH:
                //  MSG4 RRC Connection Setup 38.331
                //  varialbe length
                mac_ce_len |= (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                mac_subheader_len = 2;
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    mac_ce_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                }

                break;

            case DL_SCH_LCID_TCI_STATE_ACT_UE_SPEC_PDSCH:

                //  38.321 Ch6.1.3.14
                //  varialbe length
                mac_ce_len |= (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                mac_subheader_len = 2;
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    mac_ce_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                }
                break;
            case DL_SCH_LCID_APERIODIC_CSI_TRI_STATE_SUBSEL:
                //  38.321 Ch6.1.3.13
                //  varialbe length
                mac_ce_len |= (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                mac_subheader_len = 2;
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    mac_ce_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                }
                break;
            case DL_SCH_LCID_SP_CSI_RS_CSI_IM_RES_SET_ACT:
                //  38.321 Ch6.1.3.12
                //  varialbe length
                mac_ce_len |= (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                mac_subheader_len = 2;
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    mac_ce_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                }
                break;
            case DL_SCH_LCID_SP_SRS_ACTIVATION:
                //  38.321 Ch6.1.3.17
                //  varialbe length
                mac_ce_len |= (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                mac_subheader_len = 2;
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    mac_ce_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                }
                break;
            
            case DL_SCH_LCID_RECOMMENDED_BITRATE:
                //  38.321 Ch6.1.3.20
                mac_ce_len = 2;
                break;
            case DL_SCH_LCID_SP_ZP_CSI_RS_RES_SET_ACT:
                //  38.321 Ch6.1.3.19
                mac_ce_len = 2;
                break;
            case DL_SCH_LCID_PUCCH_SPATIAL_RELATION_ACT:
                //  38.321 Ch6.1.3.18
                mac_ce_len = 3;
                break;
            case DL_SCH_LCID_SP_CSI_REP_PUCCH_ACT:
                //  38.321 Ch6.1.3.16
                mac_ce_len = 2;
                break;
            case DL_SCH_LCID_TCI_STATE_IND_UE_SPEC_PDCCH:
                //  38.321 Ch6.1.3.15
                mac_ce_len = 2;
                break;
            case DL_SCH_LCID_DUPLICATION_ACT:
                //  38.321 Ch6.1.3.11
                mac_ce_len = 1;
                break;
            case DL_SCH_LCID_SCell_ACT_4_OCT:
                //  38.321 Ch6.1.3.10
                mac_ce_len = 4;
                break;
            case DL_SCH_LCID_SCell_ACT_1_OCT:
                //  38.321 Ch6.1.3.10
                mac_ce_len = 1;
                break;
            case DL_SCH_LCID_L_DRX:
                //  38.321 Ch6.1.3.6
                //  fixed length but not yet specify.
                mac_ce_len = 0;
                break;
            case DL_SCH_LCID_DRX:
                //  38.321 Ch6.1.3.5
                //  fixed length but not yet specify.
                mac_ce_len = 0;
                break;
            case DL_SCH_LCID_TA_COMMAND:
                //  38.321 Ch6.1.3.4
                mac_ce_len = 1;

                /*uint8_t ta_command = ((NR_MAC_CE_TA *)pduP)[1].TA_COMMAND;
                uint8_t tag_id = ((NR_MAC_CE_TA *)pduP)[1].TAGID;*/

                ul_time_alignment->apply_ta = 1;
                ul_time_alignment->ta_command = ((NR_MAC_CE_TA *)pduP)[1].TA_COMMAND;
                ul_time_alignment->tag_id = ((NR_MAC_CE_TA *)pduP)[1].TAGID;

                /*
                #ifdef DEBUG_HEADER_PARSING
                LOG_D(MAC, "[UE] CE %d : UE Timing Advance : %d\n", i, pduP[1]);
                #endif
                */

                LOG_I(MAC, "[%d.%d] Received TA_COMMAND %u TAGID %u CC_id %d\n", frameP, slot, ul_time_alignment->ta_command, ul_time_alignment->tag_id, CC_id);

                break;
            case DL_SCH_LCID_CON_RES_ID:
                //  Clause 5.1.5 and 6.1.3.3 of 3GPP TS 38.321 version 16.2.1 Release 16
                // WIP todo: handle CCCH_pdu
                mac_ce_len = 6;
                
                LOG_I(MAC, "[UE %d][RAPROC] Frame %d : received contention resolution msg: %x.%x.%x.%x.%x.%x, Terminating RA procedure\n", module_idP, frameP, pduP[0], pduP[1], pduP[2], pduP[3], pduP[4], pduP[5]);

                if (ra->RA_active == 1) {
                  nr_ra_succeeded(module_idP, frameP, slot);
                }

                break;
            case DL_SCH_LCID_PADDING:
                done = 1;
                //  end of MAC PDU, can ignore the rest.
                break;

            //  MAC SDU

            case DL_SCH_LCID_DCCH:
                //  check if LCID is valid at current time.

            case DL_SCH_LCID_DCCH1:
                //  check if LCID is valid at current time.

            default:
                //  check if LCID is valid at current time.
                if(((NR_MAC_SUBHEADER_SHORT *)pduP)->F){
                    //mac_sdu_len |= (uint16_t)(((NR_MAC_SUBHEADER_LONG *)pduP)->L2)<<8;
                    mac_subheader_len = 3;
                    mac_sdu_len = ((uint16_t)(((NR_MAC_SUBHEADER_LONG *) pduP)->L1 & 0x7f) << 8)
                    | ((uint16_t)((NR_MAC_SUBHEADER_LONG *) pduP)->L2 & 0xff);

                } else {
                  mac_sdu_len = (uint16_t)((NR_MAC_SUBHEADER_SHORT *)pduP)->L;
                  mac_subheader_len = 2;
                }

                LOG_D(MAC, "[UE %d] Frame %d : DLSCH -> DL-DTCH %d (gNB %d, %d bytes)\n", module_idP, frameP, rx_lcid, gNB_index, mac_sdu_len);

                #if defined(ENABLE_MAC_PAYLOAD_DEBUG)
                    LOG_T(MAC, "[UE %d] First 32 bytes of DLSCH : \n", module_idP);

                    for (i = 0; i < 32; i++)
                      LOG_T(MAC, "%x.", (pduP + mac_subheader_len)[i]);

                    LOG_T(MAC, "\n");
                #endif

                if (IS_SOFTMODEM_NOS1){
                  if (rx_lcid < NB_RB_MAX && rx_lcid >= DL_SCH_LCID_DTCH) {

                    mac_rlc_data_ind(module_idP,
                                     mac->crnti,
                                     gNB_index,
                                     frameP,
                                     ENB_FLAG_NO,
                                     MBMS_FLAG_NO,
                                     rx_lcid,
                                     (char *) (pduP + mac_subheader_len),
                                     mac_sdu_len,
                                     1,
                                     NULL);
                  } else {
                    LOG_E(MAC, "[UE %d] Frame %d : unknown LCID %d (gNB %d)\n", module_idP, frameP, rx_lcid, gNB_index);
                  }
                }

            break;
        }
        pduP += ( mac_subheader_len + mac_ce_len + mac_sdu_len );
        pdu_len -= ( mac_subheader_len + mac_ce_len + mac_sdu_len );
        if (pdu_len < 0)
          LOG_E(MAC, "[MAC] nr_ue_process_mac_pdu, residual mac pdu length %d < 0!\n", pdu_len);
    }
}

////////////////////////////////////////////////////////
/////* ULSCH MAC PDU generation (6.1.2 TS 38.321) */////
////////////////////////////////////////////////////////

uint16_t nr_generate_ulsch_pdu(uint8_t *sdus_payload,
                                    uint8_t *pdu,
                                    uint8_t num_sdus,
                                    uint16_t *sdu_lengths,
                                    uint8_t *sdu_lcids,
                                    uint8_t power_headroom,
                                    uint16_t crnti,
                                    uint16_t truncated_bsr,
                                    uint16_t short_bsr,
                                    uint16_t long_bsr,
                                    unsigned short post_padding,
                                    uint16_t buflen) {

  NR_MAC_SUBHEADER_FIXED *mac_pdu_ptr = (NR_MAC_SUBHEADER_FIXED *) pdu;
  unsigned char last_size = 0, i, mac_header_control_elements[16], *ce_ptr, bsr = 0;
  int mac_ce_size;
  uint16_t offset = 0;

  LOG_D(MAC, "[UE] Generating ULSCH PDU : num_sdus %d\n", num_sdus);

  #ifdef DEBUG_HEADER_PARSING

    for (i = 0; i < num_sdus; i++)
      LOG_D(MAC, "[UE] MAC subPDU %d (lcid %d length %d bytes \n", i, sdu_lcids[i], sdu_lengths[i]);

  #endif

  // Generating UL MAC subPDUs including MAC SDU and subheader

  for (i = 0; i < num_sdus; i++) {
    LOG_D(MAC, "[UE] Generating UL MAC subPDUs for SDU with lenght %d ( num_sdus %d )\n", sdu_lengths[i], num_sdus);

    if (sdu_lcids[i] != UL_SCH_LCID_CCCH){
      if (sdu_lengths[i] < 128) {
        ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->R = 0;
        ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->F = 0;
        ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->LCID = sdu_lcids[i];
        ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->L = (unsigned char) sdu_lengths[i];
        last_size = 2;
      } else {
        ((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->R = 0;
        ((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->F = 1;
        ((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->LCID = sdu_lcids[i];
        ((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->L1 = ((unsigned short) sdu_lengths[i] >> 8) & 0x7f;
        ((NR_MAC_SUBHEADER_LONG *) mac_pdu_ptr)->L2 = (unsigned short) sdu_lengths[i] & 0xff;
        last_size = 3;
      }
    } else { // UL CCCH SDU
      mac_pdu_ptr->R = 0;
      mac_pdu_ptr->LCID = sdu_lcids[i];
    }

    mac_pdu_ptr += last_size;

    // cycle through SDUs, compute each relevant and place ulsch_buffer in
    memcpy((void *) mac_pdu_ptr, (void *) sdus_payload, sdu_lengths[i]);
    sdus_payload += sdu_lengths[i]; 
    mac_pdu_ptr  += sdu_lengths[i];
  }

  // Generating UL MAC subPDUs including MAC CEs (MAC CE and subheader)

  ce_ptr = &mac_header_control_elements[0];

  if (power_headroom) {
    // MAC CE fixed subheader
    mac_pdu_ptr->R = 0;
    mac_pdu_ptr->LCID = UL_SCH_LCID_SINGLE_ENTRY_PHR;
    mac_pdu_ptr++;

    // PHR MAC CE (1 octet)
    ((NR_SINGLE_ENTRY_PHR_MAC_CE *) ce_ptr)->PH = power_headroom;
    ((NR_SINGLE_ENTRY_PHR_MAC_CE *) ce_ptr)->R1 = 0;
    ((NR_SINGLE_ENTRY_PHR_MAC_CE *) ce_ptr)->PCMAX = 0; // todo
    ((NR_SINGLE_ENTRY_PHR_MAC_CE *) ce_ptr)->R2 = 0;

    mac_ce_size = sizeof(NR_SINGLE_ENTRY_PHR_MAC_CE);

    // Copying bytes for PHR MAC CEs to the mac pdu pointer
    memcpy((void *) mac_pdu_ptr, (void *) ce_ptr, mac_ce_size);
    ce_ptr += mac_ce_size;
    mac_pdu_ptr += (unsigned char) mac_ce_size;
  }

  if (crnti) {
    // MAC CE fixed subheader
    mac_pdu_ptr->R = 0;
    mac_pdu_ptr->LCID = UL_SCH_LCID_C_RNTI;
    mac_pdu_ptr++;

    // C-RNTI MAC CE (2 octets)
    * (uint16_t *) ce_ptr = crnti;
    mac_ce_size = sizeof(uint16_t);

    // Copying bytes for CRNTI MAC CE to the mac pdu pointer
    memcpy((void *) mac_pdu_ptr, (void *) ce_ptr, mac_ce_size);
    ce_ptr += mac_ce_size;
    mac_pdu_ptr += (unsigned char) mac_ce_size;
  }

  if (truncated_bsr) {
    // MAC CE fixed subheader
    mac_pdu_ptr->R = 0;
    mac_pdu_ptr->LCID = UL_SCH_LCID_S_TRUNCATED_BSR;
    mac_pdu_ptr++;

    // Short truncated BSR MAC CE (1 octet)
    ((NR_BSR_SHORT_TRUNCATED *) ce_ptr)-> Buffer_size = truncated_bsr;
    ((NR_BSR_SHORT_TRUNCATED *) ce_ptr)-> LcgID = 0; // todo
    mac_ce_size = sizeof(NR_BSR_SHORT_TRUNCATED);

    bsr = 1 ;
  } else if (short_bsr) {
    // MAC CE fixed subheader
    mac_pdu_ptr->R = 0;
    mac_pdu_ptr->LCID = UL_SCH_LCID_S_BSR;
    mac_pdu_ptr++;

    // Short truncated BSR MAC CE (1 octet)
    ((NR_BSR_SHORT *) ce_ptr)->Buffer_size = short_bsr;
    ((NR_BSR_SHORT *) ce_ptr)->LcgID = 0; // todo
    mac_ce_size = sizeof(NR_BSR_SHORT);

    bsr = 1 ;
  } else if (long_bsr) {
    // MAC CE variable subheader
    // todo ch 6.1.3.1. TS 38.321
    // ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->R = 0;
    // ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->F = 0;
    // ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->LCID = UL_SCH_LCID_L_BSR;
    // ((NR_MAC_SUBHEADER_SHORT *) mac_pdu_ptr)->L = 0;
    // last_size = 2;
    // mac_pdu_ptr += last_size;

    // Short truncated BSR MAC CE (1 octet)
    // ((NR_BSR_LONG *) ce_ptr)->Buffer_size0 = short_bsr;
    // ((NR_BSR_LONG *) ce_ptr)->LCGID0 = 0;
    // mac_ce_size = sizeof(NR_BSR_LONG); // size is variable
  }

  if (bsr){
    // Copying bytes for BSR MAC CE to the mac pdu pointer
    memcpy((void *) mac_pdu_ptr, (void *) ce_ptr, mac_ce_size);
    ce_ptr += mac_ce_size;
    mac_pdu_ptr += (unsigned char) mac_ce_size;
  }

  // compute offset before adding padding (if necessary)
  offset = ((unsigned char *) mac_pdu_ptr - pdu);
  uint16_t padding_bytes = 0; 

  if(buflen > 0) // If the buflen is provided
    padding_bytes = buflen - offset;

  // Compute final offset for padding
  if (post_padding > 0 || padding_bytes>0) {
    ((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->R = 0;
    ((NR_MAC_SUBHEADER_FIXED *) mac_pdu_ptr)->LCID = UL_SCH_LCID_PADDING;
    mac_pdu_ptr++;
  } else {            
    // no MAC subPDU with padding
  }

  // compute final offset
  offset = ((unsigned char *) mac_pdu_ptr - pdu);

  //printf("Offset %d \n", ((unsigned char *) mac_pdu_ptr - pdu));

  return offset;
}

/////////////////////////////////////
//    Random Access Response PDU   //
//         TS 38.213 ch 8.2        //
//        TS 38.321 ch 6.2.3       //
/////////////////////////////////////
//| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |// bit-wise
//| E | T |       R A P I D       |//
//| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |//
//| R |           T A             |//
//|       T A         |  UL grant |//
//|            UL grant           |//
//|            UL grant           |//
//|            UL grant           |//
//|         T C - R N T I         |//
//|         T C - R N T I         |//
/////////////////////////////////////
//       UL grant  (27 bits)       //
/////////////////////////////////////
//| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |// bit-wise
//|-------------------|FHF|F_alloc|//
//|        Freq allocation        |//
//|    F_alloc    |Time allocation|//
//|      MCS      |     TPC   |CSI|//
/////////////////////////////////////
// TbD WIP Msg3 development ongoing
// - apply UL grant freq alloc & time alloc as per 8.2 TS 38.213
// - apply tpc command
// WIP fix:
// - time domain indication hardcoded to 0 for k2 offset
// - extend TS 38.213 ch 8.3 Msg3 PUSCH
// - b buffer
// - ulsch power offset
// - optimize: mu_pusch, j and table_6_1_2_1_1_2_time_dom_res_alloc_A are already defined in nr_ue_procedures
int nr_ue_process_rar(nr_downlink_indication_t *dl_info, NR_UL_TIME_ALIGNMENT_t *ul_time_alignment, int pdu_id){

  module_id_t mod_id       = dl_info->module_id;
  frame_t frame            = dl_info->frame;
  int slot                 = dl_info->slot;
  //int cc_id                = dl_info->cc_id;
  //uint8_t gNB_id           = dl_info->gNB_index;
  NR_UE_MAC_INST_t *mac    = get_mac_inst(mod_id);
  RA_config_t *ra          = &mac->ra;
  uint8_t n_subPDUs        = 0;  // number of RAR payloads
  uint8_t n_subheaders     = 0;  // number of MAC RAR subheaders
  uint8_t *dlsch_buffer    = dl_info->rx_ind->rx_indication_body[pdu_id].pdsch_pdu.pdu;
  uint8_t is_Msg3          = 1;
  frame_t frame_tx         = 0;
  int slot_tx              = 0;
  uint16_t rnti            = 0;
  int ret                  = 0;
  NR_RA_HEADER_RAPID *rarh = (NR_RA_HEADER_RAPID *) dlsch_buffer; // RAR subheader pointer
  NR_MAC_RAR *rar          = (NR_MAC_RAR *) (dlsch_buffer + 1);   // RAR subPDU pointer
  uint8_t preamble_index   = mac->ra.rach_ConfigDedicated->cfra->resources.choice.ssb->ssb_ResourceList.list.array[0]->ra_PreambleIndex;

  LOG_D(MAC, "In %s:[%d.%d]: [UE %d][RAPROC] invoking MAC for received RAR (current preamble %d)\n", __FUNCTION__, frame, slot, mod_id, preamble_index);

  if( mac->crnti == ra->t_crnti )
  {
    LOG_I(MAC, "Discarding the received RAR.\n");
    return -1;
  }
  while (1) {
    n_subheaders++;
    if (rarh->T == 1) {
      n_subPDUs++;
      LOG_D(MAC, "[UE %d][RAPROC] Got RAPID RAR subPDU\n", mod_id);
    } else {
      n_subPDUs++;
      ra->RA_backoff_indicator = table_7_2_1[((NR_RA_HEADER_BI *)rarh)->BI];
      ra->RA_BI_found = 1;
      LOG_D(MAC, "[UE %d][RAPROC] Got BI RAR subPDU %d\n", mod_id, ra->RA_backoff_indicator);
    }
    if (rarh->RAPID == preamble_index) {
      LOG_I(MAC, "[UE %d][RAPROC][%d.%d] Found RAR with the intended RAPID %d, CRNTI %x, t_crnti = %x\n", mod_id, frame, slot, rarh->RAPID, mac->crnti, ra->t_crnti);
      rar = (NR_MAC_RAR *) (dlsch_buffer + n_subheaders + (n_subPDUs - 1) * sizeof(NR_MAC_RAR));
      ra->RA_RAPID_found = 1;
      break;
    }
    if (rarh->E == 0) {
      LOG_W(PHY,"[UE %d][RAPROC] Received RAR preamble (%d) doesn't match the intended RAPID...\n", mod_id, preamble_index);
      break;
    } else {
      rarh += sizeof(NR_MAC_RAR) + 1;
    }
  }

  #ifdef DEBUG_RAR
  LOG_D(MAC, "[DEBUG_RAR] (%d,%d) number of RAR subheader %d; number of RAR pyloads %d\n", frame, slot, n_subheaders, n_subPDUs);
  LOG_D(MAC, "[DEBUG_RAR] Received RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for preamble %d/%d\n", *(uint8_t *) rarh, rar[0], rar[1], rar[2], rar[3], rar[4], rar[5], rarh->RAPID, preamble_index);
  #endif

  if (ra->RA_RAPID_found) {

    RAR_grant_t rar_grant;

    unsigned char tpc_command;
#ifdef DEBUG_RAR
    unsigned char csi_req;
#endif

  // TC-RNTI
  ra->t_crnti = rar->TCRNTI_2 + (rar->TCRNTI_1 << 8);

  // TA command
  ul_time_alignment->apply_ta = 1;
  ul_time_alignment->ta_command = rar->TA2 + (rar->TA1 << 5);

#ifdef DEBUG_RAR
  // CSI
  csi_req = (unsigned char) (rar->UL_GRANT_4 & 0x01);
#endif

  // TPC
  tpc_command = (unsigned char) ((rar->UL_GRANT_4 >> 1) & 0x07);
  switch (tpc_command){
    case 0:
      ra->Msg3_TPC = -6;
      break;
    case 1:
      ra->Msg3_TPC = -4;
      break;
    case 2:
      ra->Msg3_TPC = -2;
      break;
    case 3:
      ra->Msg3_TPC = 0;
      break;
    case 4:
      ra->Msg3_TPC = 2;
      break;
    case 5:
      ra->Msg3_TPC = 4;
      break;
    case 6:
      ra->Msg3_TPC = 6;
      break;
    case 7:
      ra->Msg3_TPC = 8;
      break;
  }
    // MCS
    rar_grant.mcs = (unsigned char) (rar->UL_GRANT_4 >> 4);
    // time alloc
    rar_grant.Msg3_t_alloc = (unsigned char) (rar->UL_GRANT_3 & 0x07);
    // frequency alloc
    rar_grant.Msg3_f_alloc = (uint16_t) ((rar->UL_GRANT_3 >> 4) | (rar->UL_GRANT_2 << 4) | ((rar->UL_GRANT_1 & 0x03) << 12));
    // frequency hopping
    rar_grant.freq_hopping = (unsigned char) (rar->UL_GRANT_1 >> 2);
    // TC-RNTI
    if (ra->t_crnti) {
      rnti = ra->t_crnti;
    } else {
      rnti = mac->crnti;
    }

  #ifdef DEBUG_RAR
  LOG_D(MAC, "In %s:[%d.%d]: [UE %d] Received RAR with t_alloc %d f_alloc %d ta_command %d mcs %d freq_hopping %d tpc_command %d csi_req %d t_crnti %x \n",
    __FUNCTION__,
    frame,
    slot,
    mod_id,
    rar_grant.Msg3_t_alloc,
    rar_grant.Msg3_f_alloc,
    ul_time_alignment->ta_command,
    rar_grant.mcs,
    rar_grant.freq_hopping,
    tpc_command,
    csi_req,
    ra->t_crnti);
  #endif

    // Schedule Msg3
    ret = nr_ue_pusch_scheduler(mac, is_Msg3, frame, slot, &frame_tx, &slot_tx, rar_grant.Msg3_t_alloc);

    if (ret != -1){

      fapi_nr_ul_config_request_t *ul_config = get_ul_config_request(mac, slot_tx);

      if (!ul_config) {
        LOG_W(MAC, "In %s: ul_config request is NULL. Probably due to unexpected UL DCI in frame.slot %d.%d. Ignoring DCI!\n", __FUNCTION__, frame, slot);
        return -1;
      }
      AssertFatal(ul_config->number_pdus < sizeof(ul_config->ul_config_list) / sizeof(ul_config->ul_config_list[0]),
                  "Number of PDUS in ul_config = %d > ul_config_list num elements", ul_config->number_pdus);
      nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu = &ul_config->ul_config_list[ul_config->number_pdus].pusch_config_pdu;

      fill_ul_config(ul_config, frame_tx, slot_tx, FAPI_NR_UL_CONFIG_TYPE_PUSCH);

      // Config Msg3 PDU
      nr_config_pusch_pdu(mac, pusch_config_pdu, NULL, &rar_grant, rnti, NULL);

    }

  } else {

    ra->t_crnti = 0;
    ul_time_alignment->ta_command = (0xffff);

  }

  return ret;

}