nr-ue.c 32.2 KB
Newer Older
laurent's avatar
laurent committed
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
/*
 * 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 1.0  (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
 */

#include "executables/nr-uesoftmodem.h"

#include "LAYER2/NR_MAC_UE/mac.h"
//#include "RRC/LTE/rrc_extern.h"
#include "PHY_INTERFACE/phy_interface_extern.h"

#undef MALLOC //there are two conflicting definitions, so we better make sure we don't use it at all
//#undef FRAME_LENGTH_COMPLEX_SAMPLES //there are two conflicting definitions, so we better make sure we don't use it at all

#include "fapi_nr_ue_l1.h"
#include "PHY/phy_extern_nr_ue.h"
#include "PHY/INIT/phy_init.h"
#include "PHY/MODULATION/modulation_UE.h"
#include "LAYER2/NR_MAC_UE/mac_proto.h"
#include "RRC/NR_UE/rrc_proto.h"

//#ifndef NO_RAT_NR
#include "SCHED_NR/phy_frame_config_nr.h"
//#endif
#include "SCHED_NR_UE/defs.h"

#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"

#include "common/utils/LOG/log.h"
laurent's avatar
laurent committed
46
#include "common/utils/system.h"
laurent's avatar
laurent committed
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
#include "common/utils/LOG/vcd_signal_dumper.h"

#include "T.h"

#ifdef XFORMS
  #include "PHY/TOOLS/nr_phy_scope.h"

  extern char do_forms;
#endif


extern double cpuf;
//static  nfapi_nr_config_request_t config_t;
//static  nfapi_nr_config_request_t* config =&config_t;

/*
 *  NR SLOT PROCESSING SEQUENCE
 *
 *  Processing occurs with following steps for connected mode:
 *
 *  - Rx samples for a slot are received,
 *  - PDCCH processing (including DCI extraction for downlink and uplink),
 *  - PDSCH processing (including transport blocks decoding),
 *  - PUCCH/PUSCH (transmission of acknowledgements, CSI, ... or data).
 *
 *  Time between reception of the slot and related transmission depends on UE processing performance.
 *  It is defined by the value NR_UE_CAPABILITY_SLOT_RX_TO_TX.
 *
 *  In NR, network gives the duration between Rx slot and Tx slot in the DCI:
 *  - for reception of a PDSCH and its associated acknowledgment slot (with a PUCCH or a PUSCH),
 *  - for reception of an uplink grant and its associated PUSCH slot.
 *
 *  So duration between reception and it associated transmission depends on its transmission slot given in the DCI.
 *  NR_UE_CAPABILITY_SLOT_RX_TO_TX means the minimum duration but higher duration can be given by the network because UE can support it.
 *
 *                                                                                                    Slot k
 *                                                                                  -------+------------+--------
 *                Frame                                                                    | Tx samples |
 *                Subframe                                                                 |   buffer   |
 *                Slot n                                                            -------+------------+--------
 *       ------ +------------+--------                                                     |
 *              | Rx samples |                                                             |
 *              |   buffer   |                                                             |
 *       -------+------------+--------                                                     |
 *                           |                                                             |
 *                           V                                                             |
 *                           +------------+                                                |
 *                           |   PDCCH    |                                                |
 *                           | processing |                                                |
 *                           +------------+                                                |
 *                           |            |                                                |
 *                           |            v                                                |
 *                           |            +------------+                                   |
 *                           |            |   PDSCH    |                                   |
 *                           |            | processing | decoding result                   |
 *                           |            +------------+    -> ACK/NACK of PDSCH           |
 *                           |                         |                                   |
 *                           |                         v                                   |
 *                           |                         +-------------+------------+        |
 *                           |                         | PUCCH/PUSCH | Tx samples |        |
 *                           |                         |  processing | transfer   |        |
 *                           |                         +-------------+------------+        |
 *                           |                                                             |
 *                           |/___________________________________________________________\|
 *                            \  duration between reception and associated transmission   /
 *
 * Remark: processing is done slot by slot, it can be distribute on different threads which are executed in parallel.
 * This is an architecture optimization in order to cope with real time constraints.
 * By example, for LTE, subframe processing is spread over 4 different threads.
 *
 */

#ifndef NO_RAT_NR
  #define DURATION_RX_TO_TX           (NR_UE_CAPABILITY_SLOT_RX_TO_TX)  /* for NR this will certainly depends to such UE capability which is not yet defined */
#else
  #define DURATION_RX_TO_TX           (4)   /* For LTE, this duration is fixed to 4 and it is linked to LTE standard for both modes FDD/TDD */
#endif

#define FRAME_PERIOD    100000000ULL
#define DAQ_PERIOD      66667ULL

typedef enum {
  pss=0,
  pbch=1,
  si=2
} sync_mode_t;


PHY_VARS_NR_UE *init_nr_ue_vars(NR_DL_FRAME_PARMS *frame_parms,
                                uint8_t UE_id,
                                uint8_t abstraction_flag)

{
  PHY_VARS_NR_UE *ue;
laurent's avatar
fixes  
laurent committed
141 142 143
  ue = (PHY_VARS_NR_UE *)malloc(sizeof(PHY_VARS_NR_UE));
  memset(ue,0,sizeof(PHY_VARS_NR_UE));
  memcpy(&(ue->frame_parms), frame_parms, sizeof(NR_DL_FRAME_PARMS));
144

laurent's avatar
laurent committed
145 146
  ue->Mod_id      = UE_id;
  ue->mac_enabled = 1;
147

laurent's avatar
laurent committed
148 149 150 151 152 153 154 155 156 157 158 159 160
  // initialize all signal buffers
  init_nr_ue_signal(ue,1,abstraction_flag);
  // intialize transport
  init_nr_ue_transport(ue,abstraction_flag);
  return(ue);
}

/*!
 * It performs band scanning and synchonization.
 * \param arg is a pointer to a \ref PHY_VARS_NR_UE structure.
 */

typedef struct syncData_s {
161
  UE_nr_rxtx_proc_t proc;
laurent's avatar
laurent committed
162 163 164 165 166 167 168 169 170 171 172 173 174 175
  PHY_VARS_NR_UE *UE;
} syncData_t;

static void UE_synch(void *arg) {
  syncData_t *syncD=(syncData_t *) arg;
  int i, hw_slot_offset;
  PHY_VARS_NR_UE *UE = syncD->UE;
  sync_mode_t sync_mode = pbch;
  int CC_id = UE->CC_id;
  int freq_offset=0;
  UE->is_synchronized = 0;


  if (UE->UE_scan == 0) {
176
    get_band(downlink_frequency[CC_id][0], &UE->frame_parms.eutra_band,   &uplink_frequency_offset[CC_id][0], &UE->frame_parms.frame_type);
laurent's avatar
laurent committed
177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194
    LOG_I( PHY, "[SCHED][UE] Check absolute frequency DL %"PRIu32", UL %"PRIu32" (oai_exit %d, rx_num_channels %d)\n",
           downlink_frequency[0][0], downlink_frequency[0][0]+uplink_frequency_offset[0][0],
           oai_exit, openair0_cfg[0].rx_num_channels);

    for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
      openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i];
      openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] =
        downlink_frequency[CC_id][i]+uplink_frequency_offset[CC_id][i];
      openair0_cfg[UE->rf_map.card].autocal[UE->rf_map.chain+i] = 1;

      if (uplink_frequency_offset[CC_id][i] != 0) //
        openair0_cfg[UE->rf_map.card].duplex_mode = duplex_mode_FDD;
      else //FDD
        openair0_cfg[UE->rf_map.card].duplex_mode = duplex_mode_TDD;
    }

    sync_mode = pbch;
  } else {
195 196
    LOG_E(PHY,"Fixme!\n");
    /*
laurent's avatar
laurent committed
197 198 199 200 201 202 203 204 205
    for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
      downlink_frequency[UE->rf_map.card][UE->rf_map.chain+i] = bands_to_scan.band_info[CC_id].dl_min;
      uplink_frequency_offset[UE->rf_map.card][UE->rf_map.chain+i] =
        bands_to_scan.band_info[CC_id].ul_min-bands_to_scan.band_info[CC_id].dl_min;
      openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i];
      openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] =
        downlink_frequency[CC_id][i]+uplink_frequency_offset[CC_id][i];
      openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;
    }
206
    */
laurent's avatar
laurent committed
207 208 209 210 211
  }

  LOG_W(PHY, "Starting sync detection\n");

  switch (sync_mode) {
212
    /*
laurent's avatar
laurent committed
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
    case pss:
      LOG_I(PHY,"[SCHED][UE] Scanning band %d (%d), freq %u\n",bands_to_scan.band_info[current_band].band, current_band,bands_to_scan.band_info[current_band].dl_min+current_offset);
      //lte_sync_timefreq(UE,current_band,bands_to_scan.band_info[current_band].dl_min+current_offset);
      current_offset += 20000000; // increase by 20 MHz

      if (current_offset > bands_to_scan.band_info[current_band].dl_max-bands_to_scan.band_info[current_band].dl_min) {
        current_band++;
        current_offset=0;
      }

      if (current_band==bands_to_scan.nbands) {
        current_band=0;
        oai_exit=1;
      }

      for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
        downlink_frequency[UE->rf_map.card][UE->rf_map.chain+i] = bands_to_scan.band_info[current_band].dl_min+current_offset;
        uplink_frequency_offset[UE->rf_map.card][UE->rf_map.chain+i] = bands_to_scan.band_info[current_band].ul_min-bands_to_scan.band_info[0].dl_min + current_offset;
        openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i];
        openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i]+uplink_frequency_offset[CC_id][i];
        openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;

        if (UE->UE_scan_carrier) {
          openair0_cfg[UE->rf_map.card].autocal[UE->rf_map.chain+i] = 1;
        }
      }

      break;
241
    */
laurent's avatar
laurent committed
242 243 244
    case pbch:
      LOG_I(PHY, "[UE thread Synch] Running Initial Synch (mode %d)\n",UE->mode);

245
      if (nr_initial_sync( &syncD->proc, UE, UE->mode,2) == 0) {
laurent's avatar
laurent committed
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
        freq_offset = UE->common_vars.freq_offset; // frequency offset computed with pss in initial sync
        hw_slot_offset = (UE->rx_offset<<1) / UE->frame_parms.samples_per_slot;
        LOG_I(PHY,"Got synch: hw_slot_offset %d, carrier off %d Hz, rxgain %d (DL %u, UL %u), UE_scan_carrier %d\n",
              hw_slot_offset,
              freq_offset,
              UE->rx_total_gain_dB,
              downlink_frequency[0][0]+freq_offset,
              downlink_frequency[0][0]+uplink_frequency_offset[0][0]+freq_offset,
              UE->UE_scan_carrier );

        // rerun with new cell parameters and frequency-offset
        for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
          openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;//-USRP_GAIN_OFFSET;

          if (freq_offset >= 0)
            openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] += abs(freq_offset);
          else
            openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] -= abs(freq_offset);

          openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] =
            openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i]+uplink_frequency_offset[CC_id][i];
          downlink_frequency[CC_id][i] = openair0_cfg[CC_id].rx_freq[i];
        }

        // reconfigure for potentially different bandwidth
        switch(UE->frame_parms.N_RB_DL) {
          case 6:
            openair0_cfg[UE->rf_map.card].sample_rate =1.92e6;
            openair0_cfg[UE->rf_map.card].rx_bw          =.96e6;
            openair0_cfg[UE->rf_map.card].tx_bw          =.96e6;
            //            openair0_cfg[0].rx_gain[0] -= 12;
            break;

          case 25:
            openair0_cfg[UE->rf_map.card].sample_rate =7.68e6;
            openair0_cfg[UE->rf_map.card].rx_bw          =2.5e6;
            openair0_cfg[UE->rf_map.card].tx_bw          =2.5e6;
            //            openair0_cfg[0].rx_gain[0] -= 6;
            break;

          case 50:
            openair0_cfg[UE->rf_map.card].sample_rate =15.36e6;
            openair0_cfg[UE->rf_map.card].rx_bw          =5.0e6;
            openair0_cfg[UE->rf_map.card].tx_bw          =5.0e6;
            //            openair0_cfg[0].rx_gain[0] -= 3;
            break;

          case 100:
            openair0_cfg[UE->rf_map.card].sample_rate=30.72e6;
            openair0_cfg[UE->rf_map.card].rx_bw=10.0e6;
            openair0_cfg[UE->rf_map.card].tx_bw=10.0e6;
            //            openair0_cfg[0].rx_gain[0] -= 0;
            break;
        }

        if (UE->mode != loop_through_memory) {
          UE->rfdevice.trx_set_freq_func(&UE->rfdevice,&openair0_cfg[0],0);
          //UE->rfdevice.trx_set_gains_func(&openair0,&openair0_cfg[0]);
          //UE->rfdevice.trx_stop_func(&UE->rfdevice);
          // sleep(1);
          //nr_init_frame_parms_ue(&UE->frame_parms);
          /*if (UE->rfdevice.trx_start_func(&UE->rfdevice) != 0 ) {
            LOG_E(HW,"Could not start the device\n");
            oai_exit=1;
            }*/
        }

        if (UE->UE_scan_carrier == 1) {
          UE->UE_scan_carrier = 0;
        } else {
          UE->is_synchronized = 1;
        }
      } else {
        // initial sync failed
        // calculate new offset and try again
        if (UE->UE_scan_carrier == 1) {
          if (freq_offset >= 0)
            freq_offset += 100;

          freq_offset *= -1;
          LOG_I(PHY, "[initial_sync] trying carrier off %d Hz, rxgain %d (DL %u, UL %u)\n",
                freq_offset,
                UE->rx_total_gain_dB,
                downlink_frequency[0][0]+freq_offset,
                downlink_frequency[0][0]+uplink_frequency_offset[0][0]+freq_offset );

          for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
            openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i]+freq_offset;
            openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] = downlink_frequency[CC_id][i]+uplink_frequency_offset[CC_id][i]+freq_offset;
            openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;//-USRP_GAIN_OFFSET;

            if (UE->UE_scan_carrier==1)
              openair0_cfg[UE->rf_map.card].autocal[UE->rf_map.chain+i] = 1;
          }

          if (UE->mode != loop_through_memory)
            UE->rfdevice.trx_set_freq_func(&UE->rfdevice,&openair0_cfg[0],0);
        }// initial_sync=0

        break;

      case si:
      default:
        break;
      }
  }
}

354
void processSlotRX( PHY_VARS_NR_UE *UE, UE_nr_rxtx_proc_t *proc) {
355 356 357 358

  nr_dcireq_t dcireq;
  nr_scheduled_response_t scheduled_response;

laurent's avatar
laurent committed
359 360
  // Process Rx data for one sub-frame
  if (slot_select_nr(&UE->frame_parms, proc->frame_tx, proc->nr_tti_tx) & NR_DOWNLINK_SLOT) {
361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377
    //TODO: all of this has to be moved to the MAC!!!
    dcireq.module_id = UE->Mod_id;
    dcireq.gNB_index = 0;
    dcireq.cc_id     = 0;
    dcireq.frame     = proc->frame_rx;
    dcireq.slot      = proc->nr_tti_rx;
    nr_ue_dcireq(&dcireq); //to be replaced with function pointer later

    scheduled_response.dl_config = &dcireq.dl_config_req;
    scheduled_response.ul_config = NULL;
    scheduled_response.tx_request = NULL;
    scheduled_response.module_id = UE->Mod_id;
    scheduled_response.CC_id     = 0;
    scheduled_response.frame = proc->frame_rx;
    scheduled_response.slot  = proc->nr_tti_rx;
    nr_ue_scheduled_response(&scheduled_response);

laurent's avatar
laurent committed
378 379 380
#ifdef UE_SLOT_PARALLELISATION
    phy_procedures_slot_parallelization_nrUE_RX( UE, proc, 0, 0, 1, UE->mode, no_relay, NULL );
#else
laurent's avatar
laurent committed
381
    uint64_t a=rdtsc();
382
    phy_procedures_nrUE_RX( UE, proc, 0, 1, UE->mode);
383
    LOG_D(PHY,"phy_procedures_nrUE_RX: slot:%d, time %lu\n", proc->nr_tti_rx, (rdtsc()-a)/3500);
384
    //printf(">>> nr_ue_pdcch_procedures ended\n");
laurent's avatar
laurent committed
385 386 387
#endif
  }

388 389 390
  
  // no UL for now
  /*
laurent's avatar
laurent committed
391 392 393 394 395 396 397 398 399 400 401 402
  if (UE->mac_enabled==1) {
    //  trigger L2 to run ue_scheduler thru IF module
    //  [TODO] mapping right after NR initial sync
    if(UE->if_inst != NULL && UE->if_inst->ul_indication != NULL) {
      UE->ul_indication.module_id = 0;
      UE->ul_indication.gNB_index = 0;
      UE->ul_indication.cc_id = 0;
      UE->ul_indication.frame = proc->frame_rx;
      UE->ul_indication.slot = proc->nr_tti_rx;
      UE->if_inst->ul_indication(&UE->ul_indication);
    }
  }
403
  */
laurent's avatar
laurent committed
404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422
}

/*!
 * \brief This is the UE thread for RX subframe n and TX subframe n+4.
 * This thread performs the phy_procedures_UE_RX() on every received slot.
 * then, if TX is enabled it performs TX for n+4.
 * \param arg is a pointer to a \ref PHY_VARS_NR_UE structure.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */

typedef struct processingData_s {
  UE_nr_rxtx_proc_t proc;
  PHY_VARS_NR_UE    *UE;
}  processingData_t;

void UE_processing(void *arg) {
  processingData_t *rxtxD=(processingData_t *) arg;
  UE_nr_rxtx_proc_t *proc = &rxtxD->proc;
  PHY_VARS_NR_UE    *UE   = rxtxD->UE;
423
  processSlotRX(UE, proc);
laurent's avatar
laurent committed
424 425
  //printf(">>> mac ended\n");
  // Prepare the future Tx data
426
/*
laurent's avatar
laurent committed
427 428 429 430 431 432 433
#ifndef NO_RAT_NR

  if (slot_select_nr(&UE->frame_parms, proc->frame_tx, proc->nr_tti_tx) & NR_UPLINK_SLOT)
#else
  if ((subframe_select( &UE->frame_parms, proc->subframe_tx) == SF_UL) ||
      (UE->frame_parms.frame_type == FDD) )
#endif
434
*/
435
  //if (proc->nr_tti_tx == NR_UPLINK_SLOT){
436

laurent's avatar
laurent committed
437
    if (UE->mode != loop_through_memory)
438
      phy_procedures_nrUE_TX(UE,proc,0,0);
laurent's avatar
laurent committed
439

440
  //}
441

laurent's avatar
laurent committed
442
  //phy_procedures_UE_TX(UE,proc,0,0,UE->mode,no_relay);
443

laurent's avatar
laurent committed
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461
#if 0

  if ((subframe_select( &UE->frame_parms, proc->subframe_tx) == SF_S) &&
      (UE->frame_parms.frame_type == TDD))
    if (UE->mode != loop_through_memory)
      //phy_procedures_UE_S_TX(UE,0,0,no_relay);
      updateTimes(current, &t3, 10000, timing_proc_name);

#endif
}

void readFrame(PHY_VARS_NR_UE *UE,  openair0_timestamp *timestamp) {
  void *rxp[NB_ANTENNAS_RX];
  void *dummy_tx[UE->frame_parms.nb_antennas_tx];

  for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
    dummy_tx[i]=malloc16_clear(UE->frame_parms.samples_per_subframe*4);

462
  for(int x=0; x<20; x++) {  // two frames for initial sync
laurent's avatar
laurent committed
463
    for (int i=0; i<UE->frame_parms.nb_antennas_rx; i++)
464
      rxp[i] = ((void *)&UE->common_vars.rxdata[i][0]) + 4*x*UE->frame_parms.samples_per_subframe;
laurent's avatar
laurent committed
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

    AssertFatal( UE->frame_parms.samples_per_subframe ==
                 UE->rfdevice.trx_read_func(&UE->rfdevice,
                                            timestamp,
                                            rxp,
                                            UE->frame_parms.samples_per_subframe,
                                            UE->frame_parms.nb_antennas_rx), "");
  }

  for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
    free(dummy_tx[i]);
}

void trashFrame(PHY_VARS_NR_UE *UE, openair0_timestamp *timestamp) {
  void *dummy_tx[UE->frame_parms.nb_antennas_tx];

  for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
    dummy_tx[i]=malloc16_clear(UE->frame_parms.samples_per_subframe*4);

  void *dummy_rx[UE->frame_parms.nb_antennas_rx];

  for (int i=0; i<UE->frame_parms.nb_antennas_rx; i++)
    dummy_rx[i]=malloc16(UE->frame_parms.samples_per_subframe*4);

  for (int sf=0; sf<NR_NUMBER_OF_SUBFRAMES_PER_FRAME; sf++) {
    //      printf("Reading dummy sf %d\n",sf);
    UE->rfdevice.trx_read_func(&UE->rfdevice,
                               timestamp,
                               dummy_rx,
                               UE->frame_parms.samples_per_subframe,
                               UE->frame_parms.nb_antennas_rx);
  }

  for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
    free(dummy_tx[i]);

  for (int i=0; i<UE->frame_parms.nb_antennas_rx; i++)
    free(dummy_rx[i]);
}

void syncInFrame(PHY_VARS_NR_UE *UE, openair0_timestamp *timestamp) {
506

laurent's avatar
laurent committed
507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524
    LOG_I(PHY,"Resynchronizing RX by %d samples (mode = %d)\n",UE->rx_offset,UE->mode);
    void *dummy_tx[UE->frame_parms.nb_antennas_tx];

    for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
      dummy_tx[i]=malloc16_clear(UE->frame_parms.samples_per_subframe*4);

    for ( int size=UE->rx_offset ; size > 0 ; size -= UE->frame_parms.samples_per_subframe ) {
      int unitTransfer=size>UE->frame_parms.samples_per_subframe ? UE->frame_parms.samples_per_subframe : size ;
      AssertFatal(unitTransfer ==
                  UE->rfdevice.trx_read_func(&UE->rfdevice,
                                             timestamp,
                                             (void **)UE->common_vars.rxdata,
                                             unitTransfer,
                                             UE->frame_parms.nb_antennas_rx),"");
    }

    for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
      free(dummy_tx[i]);
525

laurent's avatar
laurent committed
526 527 528 529 530 531 532 533 534 535
}

int computeSamplesShift(PHY_VARS_NR_UE *UE) {
  if ( getenv("RFSIMULATOR") != 0) {
    LOG_E(PHY,"SET rx_offset %d \n",UE->rx_offset);
    //UE->rx_offset_diff=0;
    return 0;
  }

  // compute TO compensation that should be applied for this frame
536 537 538
  if ( UE->rx_offset < UE->frame_parms.samples_per_frame/2  &&
       UE->rx_offset > 0 ) {
    //LOG_I(PHY,"!!!adjusting -1 samples!!!\n");
laurent's avatar
laurent committed
539
    return -1 ;
540
  }
laurent's avatar
laurent committed
541

542 543 544
  if ( UE->rx_offset > UE->frame_parms.samples_per_frame/2 &&
       UE->rx_offset < UE->frame_parms.samples_per_frame ) {
    //LOG_I(PHY,"!!!adjusting +1 samples!!!\n");
laurent's avatar
laurent committed
545
    return 1;
546
  }
laurent's avatar
laurent committed
547

laurent's avatar
laurent committed
548 549 550 551
  return 0;
}

void *UE_thread(void *arg) {
laurent's avatar
laurent committed
552
  //this thread should be over the processing thread to keep in real time
laurent's avatar
laurent committed
553 554 555 556 557 558 559 560 561 562 563 564 565
  PHY_VARS_NR_UE *UE = (PHY_VARS_NR_UE *) arg;
  //  int tx_enabled = 0;
  openair0_timestamp timestamp;
  void *rxp[NB_ANTENNAS_RX], *txp[NB_ANTENNAS_TX];
  int start_rx_stream = 0;
  const uint16_t table_sf_slot[20] = {0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9};
  AssertFatal(0== openair0_device_load(&(UE->rfdevice), &openair0_cfg[0]), "");
  UE->rfdevice.host_type = RAU_HOST;
  AssertFatal(UE->rfdevice.trx_start_func(&UE->rfdevice) == 0, "Could not start the device\n");
  notifiedFIFO_t nf;
  initNotifiedFIFO(&nf);
  int nbSlotProcessing=0;
  int thread_idx=0;
566 567
  notifiedFIFO_t freeBlocks;
  initNotifiedFIFO_nothreadSafe(&freeBlocks);
laurent's avatar
laurent committed
568

569 570 571
  for (int i=0; i<RX_NB_TH+1; i++)  // RX_NB_TH working + 1 we are making to be pushed
    pushNotifiedFIFO_nothreadSafe(&freeBlocks,
                                  newNotifiedFIFO_elt(sizeof(processingData_t), 0,&nf,UE_processing));
laurent's avatar
laurent committed
572

laurent's avatar
fixes  
laurent committed
573
  bool syncRunning=false;
laurent's avatar
laurent committed
574
  const int nb_slot_frame = 10*UE->frame_parms.slots_per_subframe;
575
  int absolute_slot=0, decoded_frame_rx=INT_MAX, trashed_frames=0;
laurent's avatar
laurent committed
576 577

  while (!oai_exit) {
578 579 580 581 582 583 584 585 586
    if (syncRunning) {
      notifiedFIFO_elt_t *res=tryPullTpool(&nf, Tpool);

      if (res) {
        syncRunning=false;
        syncData_t *tmp=(syncData_t *)NotifiedFifoData(res);
        // shift the frame index with all the frames we trashed meanwhile we perform the synch search
        decoded_frame_rx=(tmp->proc.decoded_frame_rx+trashed_frames) % MAX_FRAME_NUMBER;
        delNotifiedFIFO_elt(res);
laurent's avatar
laurent committed
587
      } else {
588 589 590
        trashFrame(UE, &timestamp);
        trashed_frames++;
        continue;
laurent's avatar
laurent committed
591
      }
592
    }
laurent's avatar
laurent committed
593

594 595 596 597 598 599 600 601 602 603 604
    AssertFatal( !syncRunning, "At this point synchronisation can't be running\n");

    if (!UE->is_synchronized) {
      readFrame(UE, &timestamp);
      notifiedFIFO_elt_t *Msg=newNotifiedFIFO_elt(sizeof(syncData_t),0,&nf,UE_synch);
      syncData_t *syncMsg=(syncData_t *)NotifiedFifoData(Msg);
      syncMsg->UE=UE;
      memset(&syncMsg->proc, 0, sizeof(syncMsg->proc));
      pushTpool(Tpool, Msg);
      trashed_frames=0;
      syncRunning=true;
laurent's avatar
laurent committed
605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
      continue;
    }

    if (start_rx_stream==0) {
      start_rx_stream=1;
      syncInFrame(UE, &timestamp);
      UE->rx_offset=0;
      UE->time_sync_cell=0;
      // read in first symbol
      AssertFatal (UE->frame_parms.ofdm_symbol_size+UE->frame_parms.nb_prefix_samples0 ==
                   UE->rfdevice.trx_read_func(&UE->rfdevice,
                                              &timestamp,
                                              (void **)UE->common_vars.rxdata,
                                              UE->frame_parms.ofdm_symbol_size+UE->frame_parms.nb_prefix_samples0,
                                              UE->frame_parms.nb_antennas_rx),"");
laurent's avatar
fixes  
laurent committed
620 621
      // we have the decoded frame index in the return of the synch process
      // and we shifted above to the first slot of next frame
622 623
      decoded_frame_rx++;
      // we do ++ first in the regular processing, so it will be beging of frame;
laurent's avatar
fixes  
laurent committed
624
      absolute_slot=decoded_frame_rx*nb_slot_frame + nb_slot_frame -1;
laurent's avatar
laurent committed
625 626 627
      continue;
    }

628

laurent's avatar
laurent committed
629
    absolute_slot++;
630 631 632 633
    // whatever means thread_idx
    // Fix me: will be wrong when slot 1 is slow, as slot 2 finishes
    // Slot 3 will overlap if RX_NB_TH is 2
    // this is general failure in UE !!!
laurent's avatar
laurent committed
634
    thread_idx = absolute_slot % RX_NB_TH;
laurent's avatar
fixes  
laurent committed
635
    int slot_nr = absolute_slot % nb_slot_frame;
636 637 638 639
    notifiedFIFO_elt_t *msgToPush;
    AssertFatal((msgToPush=pullNotifiedFIFO_nothreadSafe(&freeBlocks)) != NULL,"chained list failure");
    processingData_t *curMsg=(processingData_t *)NotifiedFifoData(msgToPush);
    curMsg->UE=UE;
laurent's avatar
laurent committed
640
    // update thread index for received subframe
641
    curMsg->UE->current_thread_id[slot_nr] = thread_idx;
Florian Kaltenberger's avatar
Florian Kaltenberger committed
642 643
    curMsg->proc.CC_id = 0;
    curMsg->proc.nr_tti_rx= slot_nr;
644 645 646 647 648 649
    curMsg->proc.subframe_rx=table_sf_slot[slot_nr];
    curMsg->proc.nr_tti_tx = (absolute_slot + DURATION_RX_TO_TX) % nb_slot_frame;
    curMsg->proc.subframe_tx=curMsg->proc.nr_tti_rx;
    curMsg->proc.frame_rx = ( absolute_slot/nb_slot_frame ) % MAX_FRAME_NUMBER;
    curMsg->proc.frame_tx = ( (absolute_slot + DURATION_RX_TO_TX) /nb_slot_frame ) % MAX_FRAME_NUMBER;
    curMsg->proc.decoded_frame_rx=-1;
Hongzhi Wang's avatar
Hongzhi Wang committed
650 651 652
    //LOG_I(PHY,"Process slot %d thread Idx %d total gain %d\n", slot_nr, thread_idx, UE->rx_total_gain_dB);

#ifdef OAI_ADRV9371_ZC706
653
    uint32_t total_gain_dB_prev = 0;
Hongzhi Wang's avatar
Hongzhi Wang committed
654 655 656 657 658 659
    if (total_gain_dB_prev != UE->rx_total_gain_dB) {
		total_gain_dB_prev = UE->rx_total_gain_dB;
        openair0_cfg[0].rx_gain[0] = UE->rx_total_gain_dB-20;
        UE->rfdevice.trx_set_gains_func(&UE->rfdevice,&openair0_cfg[0]);
    }
#endif
laurent's avatar
laurent committed
660 661 662 663 664 665 666

    for (int i=0; i<UE->frame_parms.nb_antennas_rx; i++)
      rxp[i] = (void *)&UE->common_vars.rxdata[i][UE->frame_parms.ofdm_symbol_size+
               UE->frame_parms.nb_prefix_samples0+
               slot_nr*UE->frame_parms.samples_per_slot];

    for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
667
      txp[i] = (void *)&UE->common_vars.txdata[i][((curMsg->proc.nr_tti_rx + 2)%nb_slot_frame)*UE->frame_parms.samples_per_slot];
laurent's avatar
laurent committed
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715

    int readBlockSize, writeBlockSize;

    if (slot_nr<(nb_slot_frame - 1)) {
      readBlockSize=UE->frame_parms.samples_per_slot;
      writeBlockSize=UE->frame_parms.samples_per_slot;
    } else {
      UE->rx_offset_diff = computeSamplesShift(UE);
      readBlockSize=UE->frame_parms.samples_per_slot -
                    UE->frame_parms.ofdm_symbol_size -
                    UE->frame_parms.nb_prefix_samples0 -
                    UE->rx_offset_diff;
      writeBlockSize=UE->frame_parms.samples_per_slot -
                     UE->rx_offset_diff;
    }

    AssertFatal(readBlockSize ==
                UE->rfdevice.trx_read_func(&UE->rfdevice,
                                           &timestamp,
                                           rxp,
                                           readBlockSize,
                                           UE->frame_parms.nb_antennas_rx),"");
    AssertFatal( writeBlockSize ==
                 UE->rfdevice.trx_write_func(&UE->rfdevice,
                     timestamp+
                     (2*UE->frame_parms.samples_per_slot) -
                     UE->frame_parms.ofdm_symbol_size-UE->frame_parms.nb_prefix_samples0 -
                     openair0_cfg[0].tx_sample_advance,
                     txp,
                     writeBlockSize,
                     UE->frame_parms.nb_antennas_tx,
                     1),"");

    if( slot_nr==(nb_slot_frame-1)) {
      // read in first symbol of next frame and adjust for timing drift
      int first_symbols=writeBlockSize-readBlockSize;

      if ( first_symbols > 0 )
        AssertFatal(first_symbols ==
                    UE->rfdevice.trx_read_func(&UE->rfdevice,
                                               &timestamp,
                                               (void **)UE->common_vars.rxdata,
                                               first_symbols,
                                               UE->frame_parms.nb_antennas_rx),"");
      else
        LOG_E(PHY,"can't compensate: diff =%d\n", first_symbols);
    }

716 717 718
    curMsg->proc.timestamp_tx = timestamp+
                                (DURATION_RX_TO_TX*UE->frame_parms.samples_per_slot)-
                                UE->frame_parms.ofdm_symbol_size-UE->frame_parms.nb_prefix_samples0;
laurent's avatar
fixes  
laurent committed
719
    notifiedFIFO_elt_t *res;
laurent's avatar
laurent committed
720

721
    while (nbSlotProcessing >= RX_NB_TH) {
722
      if ( (res=tryPullTpool(&nf, Tpool)) != NULL ) {
laurent's avatar
laurent committed
723 724
        nbSlotProcessing--;
        processingData_t *tmp=(processingData_t *)res->msgData;
laurent's avatar
fixes  
laurent committed
725

laurent's avatar
laurent committed
726 727
        if (tmp->proc.decoded_frame_rx != -1)
          decoded_frame_rx=tmp->proc.decoded_frame_rx;
laurent's avatar
fixes  
laurent committed
728

729
        pushNotifiedFIFO_nothreadSafe(&freeBlocks,res);
730
      }
laurent's avatar
laurent committed
731

laurent's avatar
laurent committed
732 733 734
      usleep(200);
    }

735 736
    if (  decoded_frame_rx != curMsg->proc.frame_rx &&
          ((decoded_frame_rx+1) % MAX_FRAME_NUMBER) != curMsg->proc.frame_rx )
737
      LOG_D(PHY,"Decoded frame index (%d) is not compatible with current context (%d), UE should go back to synch mode\n",
738
            decoded_frame_rx, curMsg->proc.frame_rx  );
laurent's avatar
laurent committed
739

740
    nbSlotProcessing++;
741 742
    msgToPush->key=slot_nr;
    pushTpool(Tpool, msgToPush);
laurent's avatar
laurent committed
743 744 745 746 747 748

    if (getenv("RFSIMULATOR")) {
      // FixMe: Wait previous thread is done, because race conditions seems too bad
      // in case of actual RF board, the overlap between threads mitigate the issue
      // We must receive one message, that proves the slot processing is done
      res=pullTpool(&nf, Tpool);
laurent's avatar
laurent committed
749
      nbSlotProcessing--;
laurent's avatar
fixes  
laurent committed
750 751 752 753 754
      processingData_t *tmp=(processingData_t *)res->msgData;

      if (tmp->proc.decoded_frame_rx != -1)
        decoded_frame_rx=tmp->proc.decoded_frame_rx;

755
      pushNotifiedFIFO_nothreadSafe(&freeBlocks,res);
laurent's avatar
laurent committed
756 757 758 759 760 761
    }
  } // while !oai_exit

  return NULL;
}

762
void init_NR_UE(int nb_inst) {
laurent's avatar
laurent committed
763 764 765
  int inst;
  NR_UE_MAC_INST_t *mac_inst;
  pthread_t threads[nb_inst];
laurent's avatar
fixes  
laurent committed
766

laurent's avatar
laurent committed
767 768 769 770 771
  for (inst=0; inst < nb_inst; inst++) {
    PHY_VARS_NR_UE *UE = PHY_vars_UE_g[inst][0];
    AssertFatal((UE->if_inst = nr_ue_if_module_init(inst)) != NULL, "can not initial IF module\n");
    nr_l3_init_ue();
    nr_l2_init_ue();
772
    mac_inst = get_mac_inst(inst);
laurent's avatar
laurent committed
773
    mac_inst->if_module = UE->if_inst;
774 775 776 777 778 779 780 781 782 783 784
    // Initial bandwidth part configuration -- full carrier bandwidth
    mac_inst->initial_bwp_dl.bwp_id = 0;
    mac_inst->initial_bwp_dl.location = 0;
    mac_inst->initial_bwp_dl.scs = UE->frame_parms.subcarrier_spacing;
    mac_inst->initial_bwp_dl.N_RB = UE->frame_parms.N_RB_DL;
    mac_inst->initial_bwp_dl.cyclic_prefix = UE->frame_parms.Ncp;
    mac_inst->initial_bwp_ul.bwp_id = 0;
    mac_inst->initial_bwp_ul.location = 0;
    mac_inst->initial_bwp_ul.scs = UE->frame_parms.subcarrier_spacing;
    mac_inst->initial_bwp_ul.N_RB = UE->frame_parms.N_RB_UL;
    mac_inst->initial_bwp_ul.cyclic_prefix = UE->frame_parms.Ncp;
laurent's avatar
laurent committed
785
    LOG_I(PHY,"Intializing UE Threads for instance %d (%p,%p)...\n",inst,PHY_vars_UE_g[inst],PHY_vars_UE_g[inst][0]);
laurent's avatar
laurent committed
786
    threadCreate(&threads[inst], UE_thread, (void *)UE, "UEthread", -1, OAI_PRIORITY_RT_MAX);
787 788

#ifdef UE_DLSCH_PARALLELISATION
789
    pthread_t dlsch0_threads;
790 791 792
    threadCreate(&dlsch0_threads, dlsch_thread, (void *)UE, "DLthread", -1, OAI_PRIORITY_RT_MAX-1);
#endif

laurent's avatar
laurent committed
793 794 795 796 797
  }

  printf("UE threads created by %ld\n", gettid());
}