openairinterface5g/openair1/SCHED_NR_UE/fapi_nr_ue_l1.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 fapi_nr_ue_l1.c
 * \brief functions for NR UE FAPI-like interface
 * \author R. Knopp, K.H. HSU
 * \date 2018
 * \version 0.1
 * \company Eurecom / NTUST
 * \email: knopp@eurecom.fr, kai-hsiang.hsu@eurecom.fr
 * \note
 * \warning
 */

#include <stdio.h>

#include "fapi_nr_ue_interface.h"
#include "fapi_nr_ue_l1.h"
#include "harq_nr.h"
#include "openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.h"
#include "PHY/defs_nr_UE.h"
#include "PHY/impl_defs_nr.h"
#include "utils.h"
#include "openair2/PHY_INTERFACE/queue_t.h"
#include "SCHED_NR_UE/phy_sch_processing_time.h"

extern PHY_VARS_NR_UE ***PHY_vars_UE_g;

const char *const dl_pdu_type[] = {"DCI", "DLSCH", "RA_DLSCH", "SI_DLSCH", "P_DLSCH", "CSI_RS", "CSI_IM", "TA"};
const char *const ul_pdu_type[] = {"PRACH", "PUCCH", "PUSCH", "SRS"};
queue_t nr_rx_ind_queue;
queue_t nr_crc_ind_queue;
queue_t nr_uci_ind_queue;
queue_t nr_rach_ind_queue;

static void fill_uci_2_3_4(nfapi_nr_uci_pucch_pdu_format_2_3_4_t *pdu_2_3_4,
                           fapi_nr_ul_config_pucch_pdu *pucch_pdu)
{
  NR_UE_MAC_INST_t *mac = get_mac_inst(0);
  memset(pdu_2_3_4, 0, sizeof(*pdu_2_3_4));
  pdu_2_3_4->handle = 0;
  pdu_2_3_4->rnti = pucch_pdu->rnti;
  pdu_2_3_4->pucch_format = 2;
  pdu_2_3_4->ul_cqi = 255;
  pdu_2_3_4->timing_advance = 0;
  pdu_2_3_4->rssi = 0;
  // TODO: Eventually check 38.212:Sect.631 to know when to use csi_part2, for now only using csi_part1
  pdu_2_3_4->pduBitmap = 4;
  pdu_2_3_4->csi_part1.csi_part1_bit_len = mac->nr_ue_emul_l1.num_csi_reports;
  int csi_part1_byte_len = (int)((pdu_2_3_4->csi_part1.csi_part1_bit_len / 8) + 1);
  AssertFatal(!pdu_2_3_4->csi_part1.csi_part1_payload, "pdu_2_3_4->csi_part1.csi_part1_payload != NULL\n");
  pdu_2_3_4->csi_part1.csi_part1_payload = CALLOC(csi_part1_byte_len,
                                                  sizeof(pdu_2_3_4->csi_part1.csi_part1_payload));
  for (int k = 0; k < csi_part1_byte_len; k++)
  {
    pdu_2_3_4->csi_part1.csi_part1_payload[k] = (pucch_pdu->payload >> (k * 8)) & 0xff;
  }
  pdu_2_3_4->csi_part1.csi_part1_crc = 0;
}

static void free_uci_inds(nfapi_nr_uci_indication_t *uci_ind)
{
    for (int k = 0; k < uci_ind->num_ucis; k++)
    {
        if (uci_ind->uci_list[k].pdu_type == NFAPI_NR_UCI_FORMAT_0_1_PDU_TYPE)
        {
            nfapi_nr_uci_pucch_pdu_format_0_1_t *pdu_0_1 = &uci_ind->uci_list[k].pucch_pdu_format_0_1;
            free(pdu_0_1->sr);
            pdu_0_1->sr = NULL;
            if (pdu_0_1->harq)
            {
                free(pdu_0_1->harq->harq_list);
                pdu_0_1->harq->harq_list = NULL;
            }
            free(pdu_0_1->harq);
            pdu_0_1->harq = NULL;
        }
        if (uci_ind->uci_list[k].pdu_type == NFAPI_NR_UCI_FORMAT_2_3_4_PDU_TYPE)
        {
            nfapi_nr_uci_pucch_pdu_format_2_3_4_t *pdu_2_3_4 = &uci_ind->uci_list[k].pucch_pdu_format_2_3_4;
            free(pdu_2_3_4->sr.sr_payload);
            pdu_2_3_4->sr.sr_payload = NULL;
            free(pdu_2_3_4->harq.harq_payload);
            pdu_2_3_4->harq.harq_payload = NULL;
        }
    }
    free(uci_ind->uci_list);
    uci_ind->uci_list = NULL;
    free(uci_ind);
    uci_ind = NULL;
}

int8_t nr_ue_scheduled_response_stub(nr_scheduled_response_t *scheduled_response) {

  NR_UE_MAC_INST_t *mac = get_mac_inst(0);

  if(scheduled_response != NULL) {
    if (scheduled_response->ul_config != NULL) {
      fapi_nr_ul_config_request_t *ul_config = scheduled_response->ul_config;
      AssertFatal(ul_config->number_pdus < sizeof(ul_config->ul_config_list) / sizeof(ul_config->ul_config_list[0]),
                  "Too many ul_config pdus %d", ul_config->number_pdus);
      for (int i = 0; i < ul_config->number_pdus; ++i) {
        LOG_D(NR_PHY, "In %s: processing type %d PDU of %d total UL PDUs (ul_config %p) \n",
              __FUNCTION__, ul_config->ul_config_list[i].pdu_type, ul_config->number_pdus, ul_config);

        uint8_t pdu_type = ul_config->ul_config_list[i].pdu_type;
        switch (pdu_type) {
          case FAPI_NR_UL_CONFIG_TYPE_PRACH: {
            fapi_nr_ul_config_prach_pdu *prach_pdu = &ul_config->ul_config_list[i].prach_config_pdu;
            nfapi_nr_rach_indication_t *rach_ind = CALLOC(1, sizeof(*rach_ind));
            rach_ind->sfn = scheduled_response->frame;
            rach_ind->slot = scheduled_response->slot;
            rach_ind->header.message_id = NFAPI_NR_PHY_MSG_TYPE_RACH_INDICATION;
            uint8_t pdu_index = 0;
            rach_ind->pdu_list = CALLOC(1, sizeof(*rach_ind->pdu_list));
            rach_ind->number_of_pdus  = 1;
            rach_ind->pdu_list[pdu_index].phy_cell_id = prach_pdu->phys_cell_id;
            rach_ind->pdu_list[pdu_index].symbol_index = prach_pdu->prach_start_symbol;
            rach_ind->pdu_list[pdu_index].slot_index = prach_pdu->prach_slot;
            rach_ind->pdu_list[pdu_index].freq_index = prach_pdu->num_ra;
            rach_ind->pdu_list[pdu_index].avg_rssi = 128;
            rach_ind->pdu_list[pdu_index].avg_snr = 0xff; // invalid for now
            rach_ind->pdu_list[pdu_index].num_preamble  = 1;
            const int num_p = rach_ind->pdu_list[pdu_index].num_preamble;
            rach_ind->pdu_list[pdu_index].preamble_list = calloc(num_p, sizeof(nfapi_nr_prach_indication_preamble_t));
            rach_ind->pdu_list[pdu_index].preamble_list[0].preamble_index = prach_pdu->ra_PreambleIndex;
            rach_ind->pdu_list[pdu_index].preamble_list[0].timing_advance = 0;
            rach_ind->pdu_list[pdu_index].preamble_list[0].preamble_pwr = 0xffffffff;

            if (!put_queue(&nr_rach_ind_queue, rach_ind)) {
              for (int pdu_index = 0; pdu_index < rach_ind->number_of_pdus; pdu_index++)
                free(rach_ind->pdu_list[pdu_index].preamble_list);
              free(rach_ind->pdu_list);
              free(rach_ind);
            }
            LOG_D(NR_MAC, "We have successfully filled the rach_ind queue with the recently filled rach ind\n");
            break;
          }
          case (FAPI_NR_UL_CONFIG_TYPE_PUSCH): {
            nfapi_nr_rx_data_indication_t *rx_ind = CALLOC(1, sizeof(*rx_ind));
            nfapi_nr_crc_indication_t *crc_ind = CALLOC(1, sizeof(*crc_ind));
            nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu = &ul_config->ul_config_list[i].pusch_config_pdu;
            if (scheduled_response->tx_request) {
              AssertFatal(scheduled_response->tx_request->number_of_pdus <
                          sizeof(scheduled_response->tx_request->tx_request_body) / sizeof(scheduled_response->tx_request->tx_request_body[0]),
                          "Too many tx_req pdus %d", scheduled_response->tx_request->number_of_pdus);
              rx_ind->header.message_id = NFAPI_NR_PHY_MSG_TYPE_RX_DATA_INDICATION;
              rx_ind->sfn = scheduled_response->ul_config->sfn;
              rx_ind->slot = scheduled_response->ul_config->slot;
              rx_ind->number_of_pdus = scheduled_response->tx_request->number_of_pdus;
              rx_ind->pdu_list = CALLOC(rx_ind->number_of_pdus, sizeof(*rx_ind->pdu_list));
              for (int j = 0; j < rx_ind->number_of_pdus; j++) {
                fapi_nr_tx_request_body_t *tx_req_body = &scheduled_response->tx_request->tx_request_body[j];
                rx_ind->pdu_list[j].handle = pusch_config_pdu->handle;
                rx_ind->pdu_list[j].harq_id = pusch_config_pdu->pusch_data.harq_process_id;
                rx_ind->pdu_list[j].pdu_length = tx_req_body->pdu_length;
                rx_ind->pdu_list[j].pdu = CALLOC(tx_req_body->pdu_length, sizeof(*rx_ind->pdu_list[j].pdu));
                memcpy(rx_ind->pdu_list[j].pdu, tx_req_body->pdu, tx_req_body->pdu_length * sizeof(*rx_ind->pdu_list[j].pdu));
                rx_ind->pdu_list[j].rnti = pusch_config_pdu->rnti;
                /* TODO: Implement channel modeling to abstract TA and CQI. For now,
                   we hard code the values below since they are set in L1 and we are
                   abstracting L1. */
                rx_ind->pdu_list[j].timing_advance = 31;
                rx_ind->pdu_list[j].ul_cqi = 255;
              }

              crc_ind->header.message_id = NFAPI_NR_PHY_MSG_TYPE_CRC_INDICATION;
              crc_ind->number_crcs = scheduled_response->ul_config->number_pdus;
              crc_ind->sfn = scheduled_response->ul_config->sfn;
              crc_ind->slot = scheduled_response->ul_config->slot;
              crc_ind->crc_list = CALLOC(crc_ind->number_crcs, sizeof(*crc_ind->crc_list));
              for (int j = 0; j < crc_ind->number_crcs; j++) {
                crc_ind->crc_list[j].handle = pusch_config_pdu->handle;
                crc_ind->crc_list[j].harq_id = pusch_config_pdu->pusch_data.harq_process_id;
                LOG_D(NR_MAC, "This is the harq pid %d for crc_list[%d]\n", crc_ind->crc_list[j].harq_id, j);
                LOG_D(NR_MAC, "This is sched sfn/sl [%d %d] and crc sfn/sl [%d %d]\n",
                      scheduled_response->frame, scheduled_response->slot, crc_ind->sfn, crc_ind->slot);
                crc_ind->crc_list[j].num_cb = pusch_config_pdu->pusch_data.num_cb;
                crc_ind->crc_list[j].rnti = pusch_config_pdu->rnti;
                crc_ind->crc_list[j].tb_crc_status = 0;
                crc_ind->crc_list[j].timing_advance = 31;
                crc_ind->crc_list[j].ul_cqi = 255;
                AssertFatal(mac->nr_ue_emul_l1.harq[crc_ind->crc_list[j].harq_id].active_ul_harq_sfn_slot == -1,
                            "We did not send an active CRC when we should have!\n");
                mac->nr_ue_emul_l1.harq[crc_ind->crc_list[j].harq_id].active_ul_harq_sfn_slot = NFAPI_SFNSLOT2HEX(crc_ind->sfn, crc_ind->slot);
                LOG_D(NR_MAC, "This is sched sfn/sl [%d %d] and crc sfn/sl [%d %d] with mcs_index in ul_cqi -> %d\n",
                      scheduled_response->frame, scheduled_response->slot, crc_ind->sfn, crc_ind->slot,pusch_config_pdu->mcs_index);
              }

              if (!put_queue(&nr_rx_ind_queue, rx_ind)) {
                LOG_E(NR_MAC, "Put_queue failed for rx_ind\n");
                for (int i = 0; i < rx_ind->number_of_pdus; i++) {
                  free(rx_ind->pdu_list[i].pdu);
                  rx_ind->pdu_list[i].pdu = NULL;
                }

                free(rx_ind->pdu_list);
                rx_ind->pdu_list = NULL;
                free(rx_ind);
                rx_ind = NULL;
              }
              if (!put_queue(&nr_crc_ind_queue, crc_ind)) {
                LOG_E(NR_MAC, "Put_queue failed for crc_ind\n");
                free(crc_ind->crc_list);
                crc_ind->crc_list = NULL;
                free(crc_ind);
                crc_ind = NULL;
              }

              LOG_D(PHY, "In %s: Filled queue rx/crc_ind which was filled by ulconfig. \n", __FUNCTION__);
              scheduled_response->tx_request->number_of_pdus = 0;
            }
            break;
          }
          case FAPI_NR_UL_CONFIG_TYPE_PUCCH: {
            nfapi_nr_uci_indication_t *uci_ind = CALLOC(1, sizeof(*uci_ind));
            uci_ind->header.message_id = NFAPI_NR_PHY_MSG_TYPE_UCI_INDICATION;
            uci_ind->sfn = scheduled_response->frame;
            uci_ind->slot = scheduled_response->slot;
            uci_ind->num_ucis = 1;
            uci_ind->uci_list = CALLOC(uci_ind->num_ucis, sizeof(*uci_ind->uci_list));
            for (int j = 0; j < uci_ind->num_ucis; j++) {
              LOG_D(NR_MAC, "ul_config->ul_config_list[%d].pucch_config_pdu.n_bit = %d\n", i, ul_config->ul_config_list[i].pucch_config_pdu.n_bit);
              if (ul_config->ul_config_list[i].pucch_config_pdu.n_bit > 3 && mac->nr_ue_emul_l1.num_csi_reports > 0) {
                uci_ind->uci_list[j].pdu_type = NFAPI_NR_UCI_FORMAT_2_3_4_PDU_TYPE;
                uci_ind->uci_list[j].pdu_size = sizeof(nfapi_nr_uci_pucch_pdu_format_2_3_4_t);
                nfapi_nr_uci_pucch_pdu_format_2_3_4_t *pdu_2_3_4 = &uci_ind->uci_list[j].pucch_pdu_format_2_3_4;
                fill_uci_2_3_4(pdu_2_3_4, &ul_config->ul_config_list[i].pucch_config_pdu);
              }
              else {
                nfapi_nr_uci_pucch_pdu_format_0_1_t *pdu_0_1 = &uci_ind->uci_list[j].pucch_pdu_format_0_1;
                uci_ind->uci_list[j].pdu_type = NFAPI_NR_UCI_FORMAT_0_1_PDU_TYPE;
                uci_ind->uci_list[j].pdu_size = sizeof(nfapi_nr_uci_pucch_pdu_format_0_1_t);
                memset(pdu_0_1, 0, sizeof(*pdu_0_1));
                pdu_0_1->handle = 0;
                pdu_0_1->rnti = ul_config->ul_config_list[i].pucch_config_pdu.rnti;
                pdu_0_1->pucch_format = 1;
                pdu_0_1->ul_cqi = 255;
                pdu_0_1->timing_advance = 0;
                pdu_0_1->rssi = 0;
                if (mac->nr_ue_emul_l1.num_harqs > 0) {
                  int harq_index = 0;
                  pdu_0_1->pduBitmap = 2; // (value->pduBitmap >> 1) & 0x01) == HARQ and (value->pduBitmap) & 0x01) == SR
                  pdu_0_1->harq = CALLOC(1, sizeof(*pdu_0_1->harq));
                  pdu_0_1->harq->num_harq = mac->nr_ue_emul_l1.num_harqs;
                  pdu_0_1->harq->harq_confidence_level = 0;
                  pdu_0_1->harq->harq_list = CALLOC(pdu_0_1->harq->num_harq, sizeof(*pdu_0_1->harq->harq_list));
                  int harq_pid = -1;
                  for (int k = 0; k < NR_MAX_HARQ_PROCESSES; k++) {
                    if (mac->nr_ue_emul_l1.harq[k].active &&
                        mac->nr_ue_emul_l1.harq[k].active_dl_harq_sfn == uci_ind->sfn &&
                        mac->nr_ue_emul_l1.harq[k].active_dl_harq_slot == uci_ind->slot) {
                      mac->nr_ue_emul_l1.harq[k].active = false;
                      harq_pid = k;
                      AssertFatal(harq_index < pdu_0_1->harq->num_harq, "Invalid harq_index %d\n", harq_index);
                      pdu_0_1->harq->harq_list[harq_index].harq_value = !mac->dl_harq_info[k].ack;
                      harq_index++;
                    }
                  }
                  AssertFatal(harq_pid != -1, "No active harq_pid, sfn_slot = %u.%u", uci_ind->sfn, uci_ind->slot);
                }
              }
            }

            LOG_D(NR_PHY, "Sending UCI with %d PDUs in sfn.slot %d/%d\n",
                  uci_ind->num_ucis, uci_ind->sfn, uci_ind->slot);
            NR_UL_IND_t ul_info = {
                .uci_ind = *uci_ind,
            };
            send_nsa_standalone_msg(&ul_info, uci_ind->header.message_id);
            free_uci_inds(uci_ind);
            break;
          }

          default:
            LOG_W(NR_MAC, "Unknown ul_config->pdu_type %d\n", pdu_type);
          break;
        }
      }
      scheduled_response->ul_config->number_pdus = 0;
    }
  }
  return 0;
}

static void configure_dlsch(NR_UE_DLSCH_t *dlsch0,
                            NR_DL_UE_HARQ_t *harq_list,
                            fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu,
                            module_id_t module_id,
                            int rnti)
{
  const uint8_t current_harq_pid = dlsch_config_pdu->harq_process_nbr;
  dlsch0->active = true;
  dlsch0->rnti = rnti;

  LOG_D(PHY,"current_harq_pid = %d\n", current_harq_pid);

  NR_DL_UE_HARQ_t *dlsch0_harq = &harq_list[current_harq_pid];

  //get nrOfLayers from DCI info
  uint8_t Nl = 0;
  for (int i = 0; i < 12; i++) { // max 12 ports
    if ((dlsch_config_pdu->dmrs_ports>>i)&0x01) Nl += 1;
  }
  dlsch0->Nl = Nl;
  downlink_harq_process(dlsch0_harq, current_harq_pid, dlsch_config_pdu->ndi, dlsch_config_pdu->rv, dlsch0->rnti_type);
  if (dlsch0_harq->status != ACTIVE) {
    // dlsch0_harq->status not ACTIVE due to false retransmission
    // Reset the following flag to skip PDSCH procedures in that case and retrasmit harq status
    dlsch0->active = false;
    update_harq_status(module_id, current_harq_pid, dlsch0_harq->ack);
  }
}

void configure_ta_command(PHY_VARS_NR_UE *ue, fapi_nr_ta_command_pdu *ta_command_pdu)
{

  /* Time Alignment procedure
  // - UE processing capability 1
  // - Setting the TA update to be applied after the reception of the TA command
  // - Timing adjustment computed according to TS 38.213 section 4.2
  // - Durations of N1 and N2 symbols corresponding to PDSCH and PUSCH are
  //   computed according to sections 5.3 and 6.4 of TS 38.214 */
  const int numerology = ue->frame_parms.numerology_index;
  const int ofdm_symbol_size = ue->frame_parms.ofdm_symbol_size;
  const int nb_prefix_samples = ue->frame_parms.nb_prefix_samples;
  const int samples_per_subframe = ue->frame_parms.samples_per_subframe;
  const int slots_per_frame = ue->frame_parms.slots_per_frame;
  const int slots_per_subframe = ue->frame_parms.slots_per_subframe;

  const double tc_factor = 1.0 / samples_per_subframe;
  // convert time factor "16 * 64 * T_c / (2^mu)" in N_TA calculation in TS38.213 section 4.2 to samples by multiplying with samples per second
  //   16 * 64 * T_c            / (2^mu) * samples_per_second
  // = 16 * T_s                 / (2^mu) * samples_per_second
  // = 16 * 1 / (15 kHz * 2048) / (2^mu) * (15 kHz * 2^mu * ofdm_symbol_size)
  // = 16 * 1 /           2048           *                  ofdm_symbol_size
  // = 16 * ofdm_symbol_size / 2048
  uint16_t bw_scaling = 16 * ofdm_symbol_size / 2048;

  const int Ta_max = 3846; // Max value of 12 bits TA Command
  const double N_TA_max = Ta_max * bw_scaling * tc_factor;

  // symbols corresponding to a PDSCH processing time for UE processing capability 1
  // when additional PDSCH DM-RS is configured
  int N_1 = pdsch_N_1_capability_1[numerology][3];

  /* PUSCH preapration time N_2 for processing capability 1 */
  const int N_2 = pusch_N_2_timing_capability_1[numerology][1];

  /* N_t_1 time duration in msec of N_1 symbols corresponding to a PDSCH reception time
  // N_t_2 time duration in msec of N_2 symbols corresponding to a PUSCH preparation time */
  double N_t_1 = N_1 * (ofdm_symbol_size + nb_prefix_samples) * tc_factor;
  double N_t_2 = N_2 * (ofdm_symbol_size + nb_prefix_samples) * tc_factor;

  /* Time alignment procedure */
  // N_t_1 + N_t_2 + N_TA_max must be in msec
  const double t_subframe = 1.0; // subframe duration of 1 msec
  const int ul_tx_timing_adjustment = 1 + (int)ceil(slots_per_subframe*(N_t_1 + N_t_2 + N_TA_max + 0.5)/t_subframe);

  ue->ta_slot = (ta_command_pdu->ta_slot + ul_tx_timing_adjustment) % slots_per_frame;
  if (ta_command_pdu->ta_slot + ul_tx_timing_adjustment > slots_per_frame)
    ue->ta_frame = (ta_command_pdu->ta_frame + 1) % 1024;
  else
    ue->ta_frame = ta_command_pdu->ta_frame;

  ue->ta_command = ta_command_pdu->ta_command;
  LOG_D(PHY,"TA command received in Frame.Slot %d.%d -- Starting UL time alignment procedures. TA update will be applied at frame %d slot %d\n",
        ta_command_pdu->ta_frame, ta_command_pdu->ta_slot, ue->ta_frame, ue->ta_slot);
}

int8_t nr_ue_scheduled_response(nr_scheduled_response_t *scheduled_response){

  bool found = false;
  if(scheduled_response != NULL){

    module_id_t module_id = scheduled_response->module_id;
    uint8_t cc_id = scheduled_response->CC_id;
    int slot = scheduled_response->slot;

    // Note: we have to handle the thread IDs for this. To be revisited completely.
    NR_UE_CSI_IM *csiim_vars = PHY_vars_UE_g[module_id][cc_id]->csiim_vars[0];
    NR_UE_CSI_RS *csirs_vars = PHY_vars_UE_g[module_id][cc_id]->csirs_vars[0];
    NR_UE_PDCCH_CONFIG *phy_pdcch_config = NULL;

    if(scheduled_response->dl_config != NULL){
      fapi_nr_dl_config_request_t *dl_config = scheduled_response->dl_config;
      fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsch_config_pdu;
      fapi_nr_dl_config_dci_dl_pdu_rel15_t *pdcch_config;
      fapi_nr_dl_config_csiim_pdu_rel15_t *csiim_config_pdu;
      fapi_nr_dl_config_csirs_pdu_rel15_t *csirs_config_pdu;

      for (int i = 0; i < dl_config->number_pdus; ++i){
        AssertFatal(dl_config->number_pdus < FAPI_NR_DL_CONFIG_LIST_NUM,"dl_config->number_pdus %d out of bounds\n",dl_config->number_pdus);
        AssertFatal(dl_config->dl_config_list[i].pdu_type<=FAPI_NR_DL_CONFIG_TYPES,"pdu_type %d > 2\n",dl_config->dl_config_list[i].pdu_type);
        LOG_D(PHY, "In %s: frame %d slot %d received 1 DL %s PDU of %d total DL PDUs:\n",
              __FUNCTION__, scheduled_response->frame, slot, dl_pdu_type[dl_config->dl_config_list[i].pdu_type - 1], dl_config->number_pdus);

        switch(dl_config->dl_config_list[i].pdu_type) {
          case FAPI_NR_DL_CONFIG_TYPE_DCI:
            if (NULL == phy_pdcch_config) {
              phy_pdcch_config = &((nr_phy_data_t *)scheduled_response->phy_data)->phy_pdcch_config;
              phy_pdcch_config->nb_search_space = 0;
            }
            pdcch_config = &dl_config->dl_config_list[i].dci_config_pdu.dci_config_rel15;
            memcpy((void*)&phy_pdcch_config->pdcch_config[phy_pdcch_config->nb_search_space],(void*)pdcch_config,sizeof(*pdcch_config));
            phy_pdcch_config->nb_search_space = phy_pdcch_config->nb_search_space + 1;
            phy_pdcch_config->sfn = scheduled_response->frame;
            phy_pdcch_config->slot = slot;
            LOG_D(PHY,"Number of DCI SearchSpaces %d\n",phy_pdcch_config->nb_search_space);
            break;
          case FAPI_NR_DL_CONFIG_TYPE_CSI_IM:
            csiim_config_pdu = &dl_config->dl_config_list[i].csiim_config_pdu.csiim_config_rel15;
            memcpy((void*)&(csiim_vars->csiim_config_pdu), (void*)csiim_config_pdu, sizeof(fapi_nr_dl_config_csiim_pdu_rel15_t));
            csiim_vars->active = true;
            break;
          case FAPI_NR_DL_CONFIG_TYPE_CSI_RS:
            csirs_config_pdu = &dl_config->dl_config_list[i].csirs_config_pdu.csirs_config_rel15;
            memcpy((void*)&(csirs_vars->csirs_config_pdu), (void*)csirs_config_pdu, sizeof(fapi_nr_dl_config_csirs_pdu_rel15_t));
            csirs_vars->active = true;
            break;
          case FAPI_NR_DL_CONFIG_TYPE_RA_DLSCH: {
            dlsch_config_pdu = &dl_config->dl_config_list[i].dlsch_config_pdu.dlsch_config_rel15;
            NR_UE_DLSCH_t *dlsch0 = &((nr_phy_data_t *)scheduled_response->phy_data)->dlsch[0];
            dlsch0->rnti_type = _RA_RNTI_;
            dlsch0->dlsch_config = *dlsch_config_pdu;
            configure_dlsch(dlsch0, PHY_vars_UE_g[module_id][cc_id]->dl_harq_processes[0], dlsch_config_pdu, module_id,
                            dl_config->dl_config_list[i].dlsch_config_pdu.rnti);
          } break;
          case FAPI_NR_DL_CONFIG_TYPE_SI_DLSCH: {
            dlsch_config_pdu = &dl_config->dl_config_list[i].dlsch_config_pdu.dlsch_config_rel15;
            NR_UE_DLSCH_t *dlsch0 = &((nr_phy_data_t *)scheduled_response->phy_data)->dlsch[0];
            dlsch0->rnti_type = _SI_RNTI_;
            dlsch0->dlsch_config = *dlsch_config_pdu;
            configure_dlsch(dlsch0, PHY_vars_UE_g[module_id][cc_id]->dl_harq_processes[0], dlsch_config_pdu, module_id,
                            dl_config->dl_config_list[i].dlsch_config_pdu.rnti);
          } break;
          case FAPI_NR_DL_CONFIG_TYPE_DLSCH: {
            dlsch_config_pdu = &dl_config->dl_config_list[i].dlsch_config_pdu.dlsch_config_rel15;
            NR_UE_DLSCH_t *dlsch0 = &((nr_phy_data_t *)scheduled_response->phy_data)->dlsch[0];
            dlsch0->rnti_type = _C_RNTI_;
            dlsch0->dlsch_config = *dlsch_config_pdu;
            configure_dlsch(dlsch0, PHY_vars_UE_g[module_id][cc_id]->dl_harq_processes[0], dlsch_config_pdu, module_id,
                            dl_config->dl_config_list[i].dlsch_config_pdu.rnti);
          } break;
          case FAPI_NR_CONFIG_TA_COMMAND:
            configure_ta_command(PHY_vars_UE_g[module_id][cc_id], &dl_config->dl_config_list[i].ta_command_pdu);
            break;
        }
      }
      dl_config->number_pdus = 0;
    }

    if (scheduled_response->ul_config != NULL){

      fapi_nr_ul_config_request_t *ul_config = scheduled_response->ul_config;
      int pdu_done = 0;
      pthread_mutex_lock(&ul_config->mutex_ul_config);

      LOG_D(PHY, "%d.%d ul S ul_config %p pdu_done %d number_pdus %d\n", scheduled_response->frame, slot, ul_config, pdu_done, ul_config->number_pdus);
      for (int i = 0; i < ul_config->number_pdus; ++i){

        AssertFatal(ul_config->ul_config_list[i].pdu_type <= FAPI_NR_UL_CONFIG_TYPES,"pdu_type %d out of bounds\n",ul_config->ul_config_list[i].pdu_type);
        LOG_D(PHY, "[%d.%d] i %d: processing %s PDU of %d total UL PDUs (ul_config %p) \n",
              scheduled_response->frame, slot, i, ul_pdu_type[ul_config->ul_config_list[i].pdu_type - 1], ul_config->number_pdus, ul_config);

        uint8_t pdu_type = ul_config->ul_config_list[i].pdu_type, current_harq_pid, gNB_id = 0;
        /* PRACH */
        fapi_nr_ul_config_prach_pdu *prach_config_pdu;
        /* PUSCH */
        nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu;
        /* PUCCH */
        fapi_nr_ul_config_pucch_pdu *pucch_config_pdu;
        LOG_D(PHY, "%d.%d ul B ul_config %p t %d pdu_done %d number_pdus %d\n", scheduled_response->frame, slot, ul_config, pdu_type, pdu_done, ul_config->number_pdus);
        /* SRS */
        fapi_nr_ul_config_srs_pdu *srs_config_pdu;

        switch (pdu_type){
          case FAPI_NR_UL_CONFIG_TYPE_PUSCH: {
            // pusch config pdu
            pusch_config_pdu = &ul_config->ul_config_list[i].pusch_config_pdu;
            current_harq_pid = pusch_config_pdu->pusch_data.harq_process_id;
            NR_UL_UE_HARQ_t *harq_process_ul_ue = &PHY_vars_UE_g[module_id][cc_id]->ul_harq_processes[current_harq_pid];
            NR_UE_ULSCH_t *ulsch = &((nr_phy_data_tx_t *)scheduled_response->phy_data)->ulsch;
            nfapi_nr_ue_pusch_pdu_t *pusch_pdu = &ulsch->pusch_pdu;

            LOG_D(PHY,
                  "In %s i %d: copy pusch_config_pdu nrOfLayers:%d, num_dmrs_cdm_grps_no_data:%d \n",
                  __FUNCTION__,
                  i,
                  pusch_config_pdu->nrOfLayers,
                  pusch_config_pdu->num_dmrs_cdm_grps_no_data);

            memcpy(pusch_pdu, pusch_config_pdu, sizeof(nfapi_nr_ue_pusch_pdu_t));
            if (scheduled_response->tx_request) {
              for (int j = 0; j < scheduled_response->tx_request->number_of_pdus; j++) {
                fapi_nr_tx_request_body_t *tx_req_body = &scheduled_response->tx_request->tx_request_body[j];
                if ((tx_req_body->pdu_index == i) && (tx_req_body->pdu_length > 0)) {
                  LOG_D(PHY,
                        "%d.%d Copying %d bytes to harq_process_ul_ue->a (harq_pid %d)\n",
                        scheduled_response->frame,
                        slot,
                        tx_req_body->pdu_length,
                        current_harq_pid);
                  memcpy(harq_process_ul_ue->a, tx_req_body->pdu, tx_req_body->pdu_length);
                  break;
                }
              }

              harq_process_ul_ue->status = ACTIVE;
              ul_config->ul_config_list[i].pdu_type = FAPI_NR_UL_CONFIG_TYPE_DONE; // not handle it any more
              pdu_done++;
              LOG_D(PHY,
                    "%d.%d ul A ul_config %p t %d pdu_done %d number_pdus %d\n",
                    scheduled_response->frame,
                    slot,
                    ul_config,
                    pdu_type,
                    pdu_done,
                    ul_config->number_pdus);

            } else {
              LOG_E(PHY, "[phy_procedures_nrUE_TX] harq_process_ul_ue is NULL !!\n");
              return -1;
            }
          } break;

          case FAPI_NR_UL_CONFIG_TYPE_PUCCH: {
            NR_UE_PUCCH *pucch_vars = &((nr_phy_data_tx_t *)scheduled_response->phy_data)->pucch_vars;
            found = false;
            pucch_config_pdu = &ul_config->ul_config_list[i].pucch_config_pdu;
            for (int j = 0; j < 2; j++) {
              if (pucch_vars->active[j] == false) {
                LOG_D(PHY, "%d.%d Copying pucch pdu to UE PHY\n", scheduled_response->frame, slot);
                memcpy((void *)&(pucch_vars->pucch_pdu[j]), (void *)pucch_config_pdu, sizeof(fapi_nr_ul_config_pucch_pdu));
                pucch_vars->active[j] = true;
                found = true;
                ul_config->ul_config_list[i].pdu_type = FAPI_NR_UL_CONFIG_TYPE_DONE; // not handle it any more
                pdu_done++;
                LOG_D(PHY,
                      "%d.%d ul A ul_config %p t %d pdu_done %d number_pdus %d\n",
                      scheduled_response->frame,
                      slot,
                      ul_config,
                      pdu_type,
                      pdu_done,
                      ul_config->number_pdus);
                break;
              }
            }
            if (!found)
              LOG_E(PHY, "Couldn't find allocation for PUCCH PDU in PUCCH VARS\n");
          } break;

          case FAPI_NR_UL_CONFIG_TYPE_PRACH:
            // prach config pdu
            prach_config_pdu = &ul_config->ul_config_list[i].prach_config_pdu;
            memcpy((void *)&(PHY_vars_UE_g[module_id][cc_id]->prach_vars[gNB_id]->prach_pdu),
                   (void *)prach_config_pdu,
                   sizeof(fapi_nr_ul_config_prach_pdu));
            PHY_vars_UE_g[module_id][cc_id]->prach_vars[gNB_id]->active = true;
            ul_config->ul_config_list[i].pdu_type = FAPI_NR_UL_CONFIG_TYPE_DONE; // not handle it any more
            pdu_done++;
            LOG_D(PHY,
                  "%d.%d ul A ul_config %p t %d pdu_done %d number_pdus %d\n",
                  scheduled_response->frame,
                  slot,
                  ul_config,
                  pdu_type,
                  pdu_done,
                  ul_config->number_pdus);
            break;

          case FAPI_NR_UL_CONFIG_TYPE_DONE:
            pdu_done++; // count the no of pdu processed
            LOG_D(PHY,
                  "%d.%d ul A ul_config %p t %d pdu_done %d number_pdus %d\n",
                  scheduled_response->frame,
                  slot,
                  ul_config,
                  pdu_type,
                  pdu_done,
                  ul_config->number_pdus);
            break;

          case FAPI_NR_UL_CONFIG_TYPE_SRS:
            // srs config pdu
            srs_config_pdu = &ul_config->ul_config_list[i].srs_config_pdu;
            memcpy((void *)&(PHY_vars_UE_g[module_id][cc_id]->srs_vars[gNB_id]->srs_config_pdu),
                   (void *)srs_config_pdu,
                   sizeof(fapi_nr_ul_config_srs_pdu));
            PHY_vars_UE_g[module_id][cc_id]->srs_vars[gNB_id]->active = true;
            ul_config->ul_config_list[i].pdu_type = FAPI_NR_UL_CONFIG_TYPE_DONE; // not handle it any more
            pdu_done++;
            break;

          default:
            ul_config->ul_config_list[i].pdu_type = FAPI_NR_UL_CONFIG_TYPE_DONE; // not handle it any more
            pdu_done++; // count the no of pdu processed
            LOG_D(PHY,
                  "%d.%d ul A ul_config %p t %d pdu_done %d number_pdus %d\n",
                  scheduled_response->frame,
                  slot,
                  ul_config,
                  pdu_type,
                  pdu_done,
                  ul_config->number_pdus);
            break;
        }
      }


      //Clear the fields when all the config pdu are done
      if (pdu_done == ul_config->number_pdus) {
        if (scheduled_response->tx_request)
          scheduled_response->tx_request->number_of_pdus = 0;
        ul_config->sfn = 0;
        ul_config->slot = 0;
        ul_config->number_pdus = 0;
        LOG_D(PHY, "%d.%d clear ul_config %p\n", scheduled_response->frame, slot, ul_config);
        memset(ul_config->ul_config_list, 0, sizeof(ul_config->ul_config_list));
      }

      pthread_mutex_unlock(&ul_config->mutex_ul_config);
    }
  }
  return 0;
}

int8_t nr_ue_phy_config_request(nr_phy_config_t *phy_config)
{
  fapi_nr_config_request_t *nrUE_config = &PHY_vars_UE_g[phy_config->Mod_id][phy_config->CC_id]->nrUE_config;
  if(phy_config != NULL) {
    memcpy(nrUE_config,&phy_config->config_req,sizeof(fapi_nr_config_request_t));
    pushNotifiedFIFO(&PHY_vars_UE_g[phy_config->Mod_id][phy_config->CC_id]->phy_config_ind, newNotifiedFIFO_elt(1,0,NULL,NULL));
  }
  return 0;
}

void nr_ue_synch_request(nr_synch_request_t *synch_request)
{
  fapi_nr_synch_request_t *synch_req = &PHY_vars_UE_g[synch_request->Mod_id][synch_request->CC_id]->synch_request.synch_req;
  memcpy(synch_req, &synch_request->synch_req, sizeof(fapi_nr_synch_request_t));
  PHY_vars_UE_g[synch_request->Mod_id][synch_request->CC_id]->synch_request.received_synch_request = 1;
}