gNB_scheduler.c 21.6 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514
/*
 * 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 gNB_scheduler.c
 * \brief gNB scheduler top level function operates on per subframe basis
 * \author  Navid Nikaein and Raymond Knopp, WEI-TAI CHEN
 * \date 2010 - 2014, 2018
 * \email: navid.nikaein@eurecom.fr, kroempa@gmail.com
 * \version 0.5
 * \company Eurecom, NTUST
 * @ingroup _mac

 */

#include "assertions.h"

#include "LAYER2/MAC/mac.h"
#include "NR_MAC_COMMON/nr_mac_extern.h"
#include "LAYER2/MAC/mac_proto.h"
#include "NR_MAC_gNB/mac_proto.h"

#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

#include "RRC/NR/nr_rrc_extern.h"

//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"

#include "openair1/PHY/defs_gNB.h"
#include "openair1/PHY/NR_TRANSPORT/nr_dlsch.h"

//Agent-related headers
#include "flexran_agent_extern.h"
#include "flexran_agent_mac.h"

#if defined(ENABLE_ITTI)
#include "intertask_interface.h"
#endif

#include "assertions.h"
#include <openair1/PHY/LTE_TRANSPORT/transport_proto.h>

#define ENABLE_MAC_PAYLOAD_DEBUG
#define DEBUG_eNB_SCHEDULER 1

uint16_t nr_pdcch_order_table[6] = { 31, 31, 511, 2047, 2047, 8191 };

void clear_nr_nfapi_information(gNB_MAC_INST * gNB,
                                int CC_idP,
                                frame_t frameP,
                                sub_frame_t slotP){

  nfapi_nr_dl_tti_request_t    *DL_req = &gNB->DL_req[0];
  nfapi_nr_ul_tti_request_t    *UL_tti_req = &gNB->UL_tti_req[0];
  nfapi_nr_ul_dci_request_t    *UL_dci_req = &gNB->UL_dci_req[0];
  nfapi_nr_tx_data_request_t   *TX_req = &gNB->TX_req[0];

  gNB->pdu_index[CC_idP] = 0;

  if (nfapi_mode==0 || nfapi_mode == 1) { // monolithic or PNF

    DL_req[CC_idP].SFN                                   = frameP;
    DL_req[CC_idP].Slot                                  = slotP;
    DL_req[CC_idP].dl_tti_request_body.nPDUs             = 0;
    DL_req[CC_idP].dl_tti_request_body.nGroup            = 0;
    //DL_req[CC_idP].dl_tti_request_body.transmission_power_pcfich           = 6000;

    UL_dci_req[CC_idP].SFN                         = frameP;
    UL_dci_req[CC_idP].Slot                        = slotP;
    UL_dci_req[CC_idP].numPdus                     = 0;

    UL_tti_req[CC_idP].SFN                         = frameP;
    UL_tti_req[CC_idP].Slot                        = slotP;
    UL_tti_req[CC_idP].n_pdus                      = 0;
    UL_tti_req[CC_idP].n_ulsch                     = 0;
    UL_tti_req[CC_idP].n_ulcch                     = 0;
    UL_tti_req[CC_idP].n_group                     = 0;

    TX_req[CC_idP].Number_of_PDUs                  = 0;

  }
}
/*
void check_nr_ul_failure(module_id_t module_idP,
                         int CC_id,
                         int UE_id,
                         frame_t frameP,
                         sub_frame_t slotP) {

  UE_list_t                     *UE_list  = &RC.nrmac[module_idP]->UE_list;
  nfapi_nr_dl_dci_request_t  *DL_req   = &RC.nrmac[module_idP]->DL_req[0];
  uint16_t                      rnti      = UE_RNTI(module_idP, UE_id);
  NR_COMMON_channels_t          *cc       = RC.nrmac[module_idP]->common_channels;

  // check uplink failure
  if ((UE_list->UE_sched_ctrl[UE_id].ul_failure_timer > 0) &&
      (UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync == 0)) {
    LOG_I(MAC, "UE %d rnti %x: UL Failure timer %d \n", UE_id, rnti,
    UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
    if (UE_list->UE_sched_ctrl[UE_id].ra_pdcch_order_sent == 0) {
      UE_list->UE_sched_ctrl[UE_id].ra_pdcch_order_sent = 1;

      // add a format 1A dci for this UE to request an RA procedure (only one UE per subframe)
      nfapi_nr_dl_dci_request_pdu_t *dl_config_pdu                    = &DL_req[CC_id].dl_tti_request_body.dl_config_pdu_list[DL_req[CC_id].dl_tti_request_body.number_pdu];
      memset((void *) dl_config_pdu, 0,sizeof(nfapi_dl_dci_request_pdu_t));
      dl_config_pdu->pdu_type                                         = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE;
      dl_config_pdu->pdu_size                                         = (uint8_t) (2 + sizeof(nfapi_dl_config_dci_dl_pdu));
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tl.tag                = NFAPI_DL_DCI_REQUEST_DCI_DL_PDU_REL8_TAG;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format            = NFAPI_DL_DCI_FORMAT_1A;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level     = get_aggregation(get_bw_index(module_idP, CC_id),
                      UE_list->UE_sched_ctrl[UE_id].
                      dl_cqi[CC_id], format1A);
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti                  = rnti;
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.rnti_type             = 1;  // CRNTI : see Table 4-10 from SCF082 - nFAPI specifications
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.transmission_power    = 6000; // equal to RS power

      AssertFatal((cc[CC_id].mib->message.dl_Bandwidth >= 0) && (cc[CC_id].mib->message.dl_Bandwidth < 6),
      "illegal dl_Bandwidth %d\n",
      (int) cc[CC_id].mib->message.dl_Bandwidth);
      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.resource_block_coding = nr_pdcch_order_table[cc[CC_id].mib->message.dl_Bandwidth];
      DL_req[CC_id].dl_tti_request_body.number_dci++;
      DL_req[CC_id].dl_tti_request_body.number_pdu++;
      DL_req[CC_id].dl_tti_request_body.tl.tag                      = NFAPI_DL_TTI_REQUEST_BODY_TAG;
      LOG_I(MAC,
      "UE %d rnti %x: sending PDCCH order for RAPROC (failure timer %d), resource_block_coding %d \n",
      UE_id, rnti,
      UE_list->UE_sched_ctrl[UE_id].ul_failure_timer,
      dl_config_pdu->dci_dl_pdu.
      dci_dl_pdu_rel8.resource_block_coding);
    } else {    // ra_pdcch_sent==1
      LOG_I(MAC,
      "UE %d rnti %x: sent PDCCH order for RAPROC waiting (failure timer %d) \n",
      UE_id, rnti,
      UE_list->UE_sched_ctrl[UE_id].ul_failure_timer);
      if ((UE_list->UE_sched_ctrl[UE_id].ul_failure_timer % 40) == 0) UE_list->UE_sched_ctrl[UE_id].ra_pdcch_order_sent = 0;  // resend every 4 frames
    }

    UE_list->UE_sched_ctrl[UE_id].ul_failure_timer++;
    // check threshold
    if (UE_list->UE_sched_ctrl[UE_id].ul_failure_timer > 20000) {
      // inform RRC of failure and clear timer
      LOG_I(MAC,
      "UE %d rnti %x: UL Failure after repeated PDCCH orders: Triggering RRC \n",
      UE_id, rnti);
      mac_eNB_rrc_ul_failure(module_idP, CC_id, frameP, subframeP,rnti);
      UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 0;
      UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync   = 1;

      //Inform the controller about the UE deactivation. Should be moved to RRC agent in the future
      if (rrc_agent_registered[module_idP]) {
        LOG_W(MAC, "notify flexran Agent of UE state change\n");
        agent_rrc_xface[module_idP]->flexran_agent_notify_ue_state_change(module_idP,
            rnti, PROTOCOL__FLEX_UE_STATE_CHANGE_TYPE__FLUESC_DEACTIVATED);
      }
    }
  }       // ul_failure_timer>0

}
*/
/*
void schedule_nr_SRS(module_id_t module_idP, frame_t frameP, sub_frame_t subframeP)
{
  gNB_MAC_INST *gNB = RC.nrmac[module_idP];
  UE_list_t *UE_list = &gNB->UE_list;
  nfapi_ul_config_request_body_t *ul_req;
  int CC_id, UE_id;
  NR_COMMON_channels_t *cc = RC.nrmac[module_idP]->common_channels;
  SoundingRS_UL_ConfigCommon_t *soundingRS_UL_ConfigCommon;
  struct SoundingRS_UL_ConfigDedicated *soundingRS_UL_ConfigDedicated;
  uint8_t TSFC;
  uint16_t deltaTSFC;   // bitmap
  uint8_t srs_SubframeConfig;

  // table for TSFC (Period) and deltaSFC (offset)
  const uint16_t deltaTSFCTabType1[15][2] = { {1, 1}, {1, 2}, {2, 2}, {1, 5}, {2, 5}, {4, 5}, {8, 5}, {3, 5}, {12, 5}, {1, 10}, {2, 10}, {4, 10}, {8, 10}, {351, 10}, {383, 10} };  // Table 5.5.3.3-2 3GPP 36.211 FDD
  const uint16_t deltaTSFCTabType2[14][2] = { {2, 5}, {6, 5}, {10, 5}, {18, 5}, {14, 5}, {22, 5}, {26, 5}, {30, 5}, {70, 10}, {74, 10}, {194, 10}, {326, 10}, {586, 10}, {210, 10} }; // Table 5.5.3.3-2 3GPP 36.211 TDD

  uint16_t srsPeriodicity, srsOffset;

  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
    soundingRS_UL_ConfigCommon = &cc[CC_id].radioResourceConfigCommon->soundingRS_UL_ConfigCommon;
    // check if SRS is enabled in this frame/subframe
    if (soundingRS_UL_ConfigCommon) {
      srs_SubframeConfig = soundingRS_UL_ConfigCommon->choice.setup.srs_SubframeConfig;
      if (cc[CC_id].tdd_Config == NULL) { // FDD
  deltaTSFC = deltaTSFCTabType1[srs_SubframeConfig][0];
  TSFC = deltaTSFCTabType1[srs_SubframeConfig][1];
      } else {    // TDD
  deltaTSFC = deltaTSFCTabType2[srs_SubframeConfig][0];
  TSFC = deltaTSFCTabType2[srs_SubframeConfig][1];
      }
      // Sounding reference signal subframes are the subframes satisfying ns/2 mod TSFC (- deltaTSFC
      uint16_t tmp = (subframeP % TSFC);

      if ((1 << tmp) & deltaTSFC) {
  // This is an SRS subframe, loop over UEs
  for (UE_id = 0; UE_id < MAX_MOBILES_PER_GNB; UE_id++) {
    if (!RC.nrmac[module_idP]->UE_list.active[UE_id]) continue;
    ul_req = &RC.nrmac[module_idP]->UL_req[CC_id].ul_config_request_body;
    // drop the allocation if the UE hasn't send RRCConnectionSetupComplete yet
    if (mac_eNB_get_rrc_status(module_idP,UE_RNTI(module_idP, UE_id)) < RRC_CONNECTED) continue;

    AssertFatal(UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated != NULL,
          "physicalConfigDedicated is null for UE %d\n",
          UE_id);

    if ((soundingRS_UL_ConfigDedicated = UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->soundingRS_UL_ConfigDedicated) != NULL) {
      if (soundingRS_UL_ConfigDedicated->present == SoundingRS_UL_ConfigDedicated_PR_setup) {
        get_srs_pos(&cc[CC_id],
        soundingRS_UL_ConfigDedicated->choice.
        setup.srs_ConfigIndex,
        &srsPeriodicity, &srsOffset);
        if (((10 * frameP + subframeP) % srsPeriodicity) == srsOffset) {
    // Program SRS
    ul_req->srs_present = 1;
    nfapi_ul_config_request_pdu_t * ul_config_pdu = &ul_req->ul_config_pdu_list[ul_req->number_of_pdus];
    memset((void *) ul_config_pdu, 0, sizeof(nfapi_ul_config_request_pdu_t));
    ul_config_pdu->pdu_type =  NFAPI_UL_CONFIG_SRS_PDU_TYPE;
    ul_config_pdu->pdu_size =  2 + (uint8_t) (2 + sizeof(nfapi_ul_config_srs_pdu));
    ul_config_pdu->srs_pdu.srs_pdu_rel8.tl.tag = NFAPI_UL_CONFIG_REQUEST_SRS_PDU_REL8_TAG;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.size = (uint8_t)sizeof(nfapi_ul_config_srs_pdu);
    ul_config_pdu->srs_pdu.srs_pdu_rel8.rnti = UE_list->UE_template[CC_id][UE_id].rnti;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.srs_bandwidth = soundingRS_UL_ConfigDedicated->choice.setup.srs_Bandwidth;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.frequency_domain_position = soundingRS_UL_ConfigDedicated->choice.setup.freqDomainPosition;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.srs_hopping_bandwidth = soundingRS_UL_ConfigDedicated->choice.setup.srs_HoppingBandwidth;;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.transmission_comb = soundingRS_UL_ConfigDedicated->choice.setup.transmissionComb;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.i_srs = soundingRS_UL_ConfigDedicated->choice.setup.srs_ConfigIndex;
    ul_config_pdu->srs_pdu.srs_pdu_rel8.sounding_reference_cyclic_shift = soundingRS_UL_ConfigDedicated->choice.setup.cyclicShift;    //              ul_config_pdu->srs_pdu.srs_pdu_rel10.antenna_port                   = ;//
    //              ul_config_pdu->srs_pdu.srs_pdu_rel13.number_of_combs                = ;//
    RC.nrmac[module_idP]->UL_req[CC_id].sfn_sf = (frameP << 4) + subframeP;
    RC.nrmac[module_idP]->UL_req[CC_id].header.message_id = NFAPI_UL_CONFIG_REQUEST;
    ul_req->number_of_pdus++;
        } // if (((10*frameP+subframeP) % srsPeriodicity) == srsOffset)
      } // if (soundingRS_UL_ConfigDedicated->present == SoundingRS_UL_ConfigDedicated_PR_setup)
    }   // if ((soundingRS_UL_ConfigDedicated = UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->soundingRS_UL_ConfigDedicated)!=NULL)
  }   // for (UE_id ...
      }     // if((1<<tmp) & deltaTSFC)

    }     // SRS config
  }
}
*/


void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP) {

  gNB_MAC_INST *gNB = RC.nrmac[module_idP];
  NR_COMMON_channels_t *cc = gNB->common_channels;
  NR_ServingCellConfigCommon_t *scc = cc->ServingCellConfigCommon;
  nfapi_nr_ul_tti_request_t *UL_tti_req = &RC.nrmac[module_idP]->UL_tti_req[0];

  uint8_t config_index = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.prach_ConfigurationIndex;
  uint8_t mu,N_dur,N_t_slot,start_symbol;
  uint16_t format;

  if (scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing)
    mu = *scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing;
  else
    mu = scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;

  // prach is scheduled according to configuration index and tables 6.3.3.2.2 to 6.3.3.2.4
  if ( get_nr_prach_info_from_index(config_index,
                                    (int)frameP,
                                    (int)slotP,
                                    scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA,
                                    mu,
                                    cc->frame_type,
                                    &format,
                                    &start_symbol,
                                    &N_t_slot,
                                    &N_dur) ) {

    int fdm = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FDM;
    uint16_t format0 = format&0xff;      // first column of format from table
    uint16_t format1 = (format>>8)&0xff; // second column of format from table

    UL_tti_req->SFN = frameP;
    UL_tti_req->Slot = slotP;
    for (int n=0; n<(1<<fdm); n++) { // one structure per frequency domain occasion
      UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_type = NFAPI_NR_UL_CONFIG_PRACH_PDU_TYPE;
      UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_size = sizeof(nfapi_nr_prach_pdu_t);
      nfapi_nr_prach_pdu_t  *prach_pdu = &UL_tti_req->pdus_list[UL_tti_req->n_pdus].prach_pdu;
      memset(prach_pdu,0,sizeof(nfapi_nr_prach_pdu_t));
      UL_tti_req->n_pdus+=1;

      // filling the prach fapi structure
      prach_pdu->phys_cell_id = *scc->physCellId;
      prach_pdu->num_prach_ocas = N_t_slot;
      prach_pdu->prach_start_symbol = start_symbol;
      prach_pdu->num_ra = n;
      prach_pdu->num_cs = get_NCS(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig,
                                  format0,
                                  scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->restrictedSetConfig);
      // SCF PRACH PDU format field does not consider A1/B1 etc. possibilities
      // We added 9 = A1/B1 10 = A2/B2 11 A3/B3
      if (format1!=0xff) {
        switch(format0) {
          case 0xa1:
            prach_pdu->prach_format = 9;
            break;
          case 0xa2:
            prach_pdu->prach_format = 10;
            break;
          case 0xa3:
            prach_pdu->prach_format = 10;
            break;
        default:
          AssertFatal(1==0,"Only formats A1/B1 A2/B2 A3/B3 are valid for dual format");
        }
      }
      else{
        switch(format0) {
          case 0xa1:
            prach_pdu->prach_format = 0;
            break;
          case 0xa2:
            prach_pdu->prach_format = 1;
            break;
          case 0xa3:
            prach_pdu->prach_format = 2;
            break;
          case 0xb1:
            prach_pdu->prach_format = 3;
            break;
          case 0xb2:
            prach_pdu->prach_format = 4;
            break;
          case 0xb3:
            prach_pdu->prach_format = 5;
            break;
          case 0xb4:
            prach_pdu->prach_format = 6;
            break;
          case 0xc0:
            prach_pdu->prach_format = 7;
            break;
          case 0xc2:
            prach_pdu->prach_format = 8;
            break;
          case 0:
            // long formats are handled @ PHY
            break;
          case 1:
            // long formats are handled @ PHY
            break;
          case 2:
            // long formats are handled @ PHY
            break;
          case 3:
            // long formats are handled @ PHY
            break;
        default:
          AssertFatal(1==0,"Invalid PRACH format");
        }
      }
    }
  }
}


/*
void copy_nr_ulreq(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
{
  int CC_id;
  gNB_MAC_INST *mac = RC.nrmac[module_idP];

  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {

    nfapi_ul_config_request_t *ul_req                 = &mac->UL_tti_req[CC_id];

    *ul_req = *ul_req_tmp;

    // Restore the pointer
    ul_req->ul_config_request_body.ul_config_pdu_list = ul_req_pdu;
    ul_req->sfn_sf                                    = (frameP<<7) + slotP;
    ul_req_tmp->ul_config_request_body.number_of_pdus = 0;

    if (ul_req->ul_config_request_body.number_of_pdus>0)
      {
        LOG_D(PHY, "%s() active NOW (frameP:%d slotP:%d) pdus:%d\n", __FUNCTION__, frameP, slotP, ul_req->ul_config_request_body.number_of_pdus);
      }

    memcpy((void*)ul_req->ul_config_request_body.ul_config_pdu_list,
     (void*)ul_req_tmp->ul_config_request_body.ul_config_pdu_list,
     ul_req->ul_config_request_body.number_of_pdus*sizeof(nfapi_ul_config_request_pdu_t));
  }
}
*/

void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
                               frame_t frame_rxP,
                               sub_frame_t slot_rxP,
                               frame_t frame_txP,
                               sub_frame_t slot_txP){

  //printf("gNB_dlsch_ulsch_scheduler frameRX %d slotRX %d frameTX %d slotTX %d\n",frame_rxP,slot_rxP,frame_txP,slot_txP);
			       
  protocol_ctxt_t   ctxt;
  int CC_id, UE_id = 0; // i = -1
  gNB_MAC_INST *gNB = RC.nrmac[module_idP];
  NR_UE_list_t *UE_list = &gNB->UE_list;
  // rnti_t rnti;
  UE_sched_ctrl_t *ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
  NR_COMMON_channels_t *cc = gNB->common_channels;

  start_meas(&RC.nrmac[module_idP]->eNB_scheduler);
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_IN);

  pdcp_run(&ctxt);
  //rrc_rx_tx(&ctxt, CC_id);

  RC.nrmac[module_idP]->frame    = frame_rxP;
  RC.nrmac[module_idP]->slot     = slot_rxP;

  // Check if there are downlink symbols in the slot, 
  if (is_nr_DL_slot(cc->ServingCellConfigCommon,slot_txP)) {

  memset(RC.nrmac[module_idP]->cce_list[1][0],0,MAX_NUM_CCE*sizeof(int));
  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
    //mbsfn_status[CC_id] = 0;

    // clear vrb_maps
    memset(cc[CC_id].vrb_map, 0, 100);
    memset(cc[CC_id].vrb_map_UL, 0, 100);

    clear_nr_nfapi_information(RC.nrmac[module_idP], CC_id, frame_txP, slot_txP);
  }

  // refresh UE list based on UEs dropped by PHY in previous subframe
  /*
  for (i = 0; i < MAX_MOBILES_PER_GNB; i++) {
    if (UE_list->active[i]) {

      nfapi_nr_config_request_t *cfg = &RC.nrmac[module_idP]->config[CC_id];
      
      
      rnti = 0;//UE_RNTI(module_idP, i);
      CC_id = 0;//UE_PCCID(module_idP, i);
      
    } //END if (UE_list->active[i])
  } //END for (i = 0; i < MAX_MOBILES_PER_GNB; i++)
  */
  PROTOCOL_CTXT_SET_BY_MODULE_ID(&ctxt, module_idP, ENB_FLAG_YES,NOT_A_RNTI, frame_txP, slot_txP,module_idP);
  
  // This schedules MIB
  if((slot_txP == 0) && (frame_txP & 7) == 0){
    schedule_nr_mib(module_idP, frame_txP, slot_txP);
  }

  // TbD once RACH is available, start ta_timer when UE is connected
  if (ue_sched_ctl->ta_timer) ue_sched_ctl->ta_timer--;

  if (ue_sched_ctl->ta_timer == 0) {
    gNB->ta_command = ue_sched_ctl->ta_update;
    /* if time is up, then set the timer to not send it for 5 frames
    // regardless of the TA value */
    ue_sched_ctl->ta_timer = 100;
    /* reset ta_update */
    ue_sched_ctl->ta_update = 31;
    /* MAC CE flag indicating TA length */
    gNB->ta_len = 2;
  }

  // Phytest scheduling
  if (phy_test && slot_txP==1){
    nr_schedule_uss_dlsch_phytest(module_idP, frame_txP, slot_txP,NULL);
    //nr_schedule_RA(module_idP, frame_txP, slot_txP);
    // resetting ta flag
    gNB->ta_len = 0;
  }

  /*
  // Allocate CCEs for good after scheduling is done
  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++)
    allocate_CCEs(module_idP, CC_id, subframeP, 0);
  */

  } //is_nr_DL_slot

  if (is_nr_UL_slot(cc->ServingCellConfigCommon,slot_rxP)) { 

    schedule_nr_prach(module_idP, frame_rxP, slot_rxP);

    if (phy_test && slot_rxP==8){
      nr_schedule_uss_ulsch_phytest(module_idP, frame_rxP, slot_rxP);
    }
  }

  stop_meas(&RC.nrmac[module_idP]->eNB_scheduler);
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ULSCH_SCHEDULER,VCD_FUNCTION_OUT);
}