eNB_scheduler_dlsch.c 56.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/*
 * 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
 */
nikaeinn's avatar
nikaeinn committed
21 22 23

/*! \file eNB_scheduler_dlsch.c
 * \brief procedures related to eNB for the DLSCH transport channel
24
 * \author  Navid Nikaein and Raymond Knopp
nikaeinn's avatar
nikaeinn committed
25
 * \date 2010 - 2014
26
 * \email: navid.nikaein@eurecom.fr
nikaeinn's avatar
nikaeinn committed
27
 * \version 1.0
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
 * @ingroup _mac

 */

#include "assertions.h"
#include "PHY/defs.h"
#include "PHY/extern.h"

#include "SCHED/defs.h"
#include "SCHED/extern.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/proto.h"
#include "LAYER2/MAC/extern.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

#include "RRC/LITE/extern.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

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

54 55
#include "SIMULATION/TOOLS/defs.h" // for taus

56 57 58 59
#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif

Cedric Roux's avatar
Cedric Roux committed
60 61
#include "T.h"

62
#define ENABLE_MAC_PAYLOAD_DEBUG
63
//#define DEBUG_eNB_SCHEDULER 1
64

65
extern RAN_CONTEXT_t RC;
66

67 68 69 70 71 72 73 74 75 76
//------------------------------------------------------------------------------
void
add_ue_dlsch_info(
  module_id_t module_idP,
  int CC_id,
  int UE_id,
  sub_frame_t subframeP,
  UE_DLSCH_STATUS status
)
//------------------------------------------------------------------------------
77
{
78

79 80 81 82
  eNB_dlsch_info[module_idP][CC_id][UE_id].rnti             = UE_RNTI(module_idP,UE_id);
  //  eNB_dlsch_info[module_idP][CC_id][ue_mod_idP].weight           = weight;
  eNB_dlsch_info[module_idP][CC_id][UE_id].subframe         = subframeP;
  eNB_dlsch_info[module_idP][CC_id][UE_id].status           = status;
83

84
  eNB_dlsch_info[module_idP][CC_id][UE_id].serving_num++;
85 86 87

}

88 89 90 91 92 93 94 95
//------------------------------------------------------------------------------
int
schedule_next_dlue(
  module_id_t module_idP,
  int CC_id,
  sub_frame_t subframeP
)
//------------------------------------------------------------------------------
96
{
97

98
  int next_ue;
99
  UE_list_t *UE_list=&RC.mac[module_idP]->UE_list;
100

101
  for (next_ue=UE_list->head; next_ue>=0; next_ue=UE_list->next[next_ue] ) {
102
    if  (eNB_dlsch_info[module_idP][CC_id][next_ue].status == S_DL_WAITING) {
103
      return next_ue;
104
    }
105
  }
106 107

  for (next_ue=UE_list->head; next_ue>=0; next_ue=UE_list->next[next_ue] ) {
108 109
    if  (eNB_dlsch_info[module_idP][CC_id][next_ue].status == S_DL_BUFFERED) {
      eNB_dlsch_info[module_idP][CC_id][next_ue].status = S_DL_WAITING;
110
    }
111 112 113
  }

  return(-1);//next_ue;
114 115 116

}

117 118 119
//------------------------------------------------------------------------------
unsigned char
generate_dlsch_header(
120 121 122 123 124
  unsigned char* mac_header,
  unsigned char num_sdus,
  unsigned short *sdu_lengths,
  unsigned char *sdu_lcids,
  unsigned char drx_cmd,
125
  unsigned short timing_advance_cmd,
126 127 128
  unsigned char *ue_cont_res_id,
  unsigned char short_padding,
  unsigned short post_padding
129 130
)
//------------------------------------------------------------------------------
131
{
132 133 134 135 136 137 138 139 140 141

  SCH_SUBHEADER_FIXED *mac_header_ptr = (SCH_SUBHEADER_FIXED *)mac_header;
  uint8_t first_element=0,last_size=0,i;
  uint8_t mac_header_control_elements[16],*ce_ptr;

  ce_ptr = &mac_header_control_elements[0];

  // compute header components

  if ((short_padding == 1) || (short_padding == 2)) {
142 143 144 145 146
    mac_header_ptr->R    = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    first_element=1;
    last_size=1;
147
  }
148

149
  if (short_padding == 2) {
150 151 152 153 154 155
    mac_header_ptr->E = 1;
    mac_header_ptr++;
    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    last_size=1;
156 157 158
  }

  if (drx_cmd != 255) {
159 160 161
    if (first_element>0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
162
    } else {
163 164
      first_element=1;
    }
165

166 167 168 169
    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = DRX_CMD;
    last_size=1;
170 171 172
  }

  if (timing_advance_cmd != 0) {
173 174 175
    if (first_element>0) {
      mac_header_ptr->E = 1;
      mac_header_ptr++;
176
    } else {
177 178
      first_element=1;
    }
179

180 181 182 183 184 185
    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = TIMING_ADV_CMD;
    last_size=1;
    //    msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
    ((TIMING_ADVANCE_CMD *)ce_ptr)->R=0;
186 187
    AssertFatal(timing_advance_cmd < 64,"timing_advance_cmd %d > 63\n",timing_advance_cmd);
    ((TIMING_ADVANCE_CMD *)ce_ptr)->TA=timing_advance_cmd;//(timing_advance_cmd+31)&0x3f;
188
    LOG_D(MAC,"timing advance =%d (%d)\n",timing_advance_cmd,((TIMING_ADVANCE_CMD *)ce_ptr)->TA);
189 190
    ce_ptr+=sizeof(TIMING_ADVANCE_CMD);
    //msg("offset %d\n",ce_ptr-mac_header_control_elements);
191 192 193
  }

  if (ue_cont_res_id) {
194 195 196
    if (first_element>0) {
      mac_header_ptr->E = 1;
      /*
197 198 199 200
      printf("[eNB][MAC] last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
201 202
      */
      mac_header_ptr++;
203
    } else {
204 205
      first_element=1;
    }
206

207 208 209 210
    mac_header_ptr->R = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = UE_CONT_RES;
    last_size=1;
211

212
    LOG_T(MAC,"[eNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
213 214 215 216 217 218 219
          ue_cont_res_id[0],
          ue_cont_res_id[1],
          ue_cont_res_id[2],
          ue_cont_res_id[3],
          ue_cont_res_id[4],
          ue_cont_res_id[5]);

220 221 222
    memcpy(ce_ptr,ue_cont_res_id,6);
    ce_ptr+=6;
    // msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
223 224 225 226
  }

  //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

227
  for (i=0; i<num_sdus; i++) {
228
    LOG_T(MAC,"[eNB] Generate DLSCH header num sdu %d len sdu %d\n",num_sdus, sdu_lengths[i]);
229

230 231 232
    if (first_element>0) {
      mac_header_ptr->E = 1;
      /*msg("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
233 234 235
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
      ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
236 237 238
      */
      mac_header_ptr+=last_size;
      //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
239
    } else {
240 241
      first_element=1;
    }
242

243 244 245 246 247 248 249
    if (sdu_lengths[i] < 128) {
      ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->R    = 0;
      ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->E    = 0;
      ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->F    = 0;
      ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->LCID = sdu_lcids[i];
      ((SCH_SUBHEADER_SHORT *)mac_header_ptr)->L    = (unsigned char)sdu_lengths[i];
      last_size=2;
250
    } else {
251 252 253 254 255 256 257 258
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->R    = 0;
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->E    = 0;
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->F    = 1;
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->LCID = sdu_lcids[i];
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB    = ((unsigned short) sdu_lengths[i]>>8)&0x7f;
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB    = (unsigned short) sdu_lengths[i]&0xff;
      ((SCH_SUBHEADER_LONG *)mac_header_ptr)->padding   = 0x00;
      last_size=3;
259
#ifdef DEBUG_HEADER_PARSING
260
      LOG_D(MAC,"[eNB] generate long sdu, size %x (MSB %x, LSB %x)\n",
261 262 263
            sdu_lengths[i],
            ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_MSB,
            ((SCH_SUBHEADER_LONG *)mac_header_ptr)->L_LSB);
264
#endif
265
    }
266
  }
267

268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
  /*

    printf("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

    printf("last subheader : %x (R%d,E%d,LCID%d)\n",*(unsigned char*)mac_header_ptr,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
    ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);


    if (((SCH_SUBHEADER_FIXED*)mac_header_ptr)->LCID < UE_CONT_RES) {
    if (((SCH_SUBHEADER_SHORT*)mac_header_ptr)->F == 0)
    printf("F = 0, sdu len (L field) %d\n",(((SCH_SUBHEADER_SHORT*)mac_header_ptr)->L));
    else
    printf("F = 1, sdu len (L field) %d\n",(((SCH_SUBHEADER_LONG*)mac_header_ptr)->L));
    }
284
  */
285
  if (post_padding>0) {// we have lots of padding at the end of the packet
286 287 288 289 290 291 292
    mac_header_ptr->E = 1;
    mac_header_ptr+=last_size;
    // add a padding element
    mac_header_ptr->R    = 0;
    mac_header_ptr->E    = 0;
    mac_header_ptr->LCID = SHORT_PADDING;
    mac_header_ptr++;
293
  } else { // no end of packet padding
294 295
    // last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
    mac_header_ptr++;
296 297 298 299 300
  }

  //msg("After subheaders %d\n",(uint8_t*)mac_header_ptr - mac_header);

  if ((ce_ptr-mac_header_control_elements) > 0) {
301 302 303
    // printf("Copying %d bytes for control elements\n",ce_ptr-mac_header_control_elements);
    memcpy((void*)mac_header_ptr,mac_header_control_elements,ce_ptr-mac_header_control_elements);
    mac_header_ptr+=(unsigned char)(ce_ptr-mac_header_control_elements);
304
  }
305

306 307 308 309 310 311
  //msg("After CEs %d\n",(uint8_t*)mac_header_ptr - mac_header);

  return((unsigned char*)mac_header_ptr - mac_header);

}

312 313 314 315 316 317 318
//------------------------------------------------------------------------------
void
set_ul_DAI(
  int module_idP,
  int UE_idP,
  int CC_idP,
  int frameP,
knopp's avatar
knopp committed
319 320
  int subframeP
) 
321
//------------------------------------------------------------------------------
322 323
{

324
  eNB_MAC_INST         *eNB      = RC.mac[module_idP];
325 326
  UE_list_t            *UE_list  = &eNB->UE_list;
  unsigned char         DAI;
knopp's avatar
knopp committed
327 328
  COMMON_channels_t    *cc       = &eNB->common_channels[CC_idP];
  if (cc->tdd_Config != NULL) {  //TDD
329
    DAI = (UE_list->UE_template[CC_idP][UE_idP].DAI-1)&3;
330
    LOG_D(MAC,"[eNB %d] CC_id %d Frame %d, subframe %d: DAI %d for UE %d\n",module_idP,CC_idP,frameP,subframeP,DAI,UE_idP);
331
    // Save DAI for Format 0 DCI
332

knopp's avatar
knopp committed
333
    switch (cc->tdd_Config->subframeAssignment) {
334 335 336
    case 0:
      //      if ((subframeP==0)||(subframeP==1)||(subframeP==5)||(subframeP==6))
      break;
337

338 339 340
    case 1:
      switch (subframeP) {
      case 1:
341 342 343
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[7] = DAI;
        break;

344
      case 4:
345 346 347
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[8] = DAI;
        break;

348
      case 6:
349 350 351
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
        break;

352
      case 9:
353 354
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
        break;
355
      }
356

357 358
    case 2:
      //      if ((subframeP==3)||(subframeP==8))
359
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
360
      break;
361

362
    case 3:
363

364 365 366 367
      //if ((subframeP==6)||(subframeP==8)||(subframeP==0)) {
      //  LOG_D(MAC,"schedule_ue_spec: setting UL DAI to %d for subframeP %d => %d\n",DAI,subframeP, ((subframeP+8)%10)>>1);
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul[((subframeP+8)%10)>>1] = DAI;
      //}
368
      switch (subframeP) {
369 370 371
      case 5:
      case 6:
      case 1:
372 373 374
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
        break;

375 376
      case 7:
      case 8:
377 378 379
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
        break;

380 381
      case 9:
      case 0:
382 383 384
        UE_list->UE_template[CC_idP][UE_idP].DAI_ul[4] = DAI;
        break;

385
      default:
386
        break;
387
      }
388

389
      break;
390

391 392
    case 4:
      //      if ((subframeP==8)||(subframeP==9))
393
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
394
      break;
395

396 397
    case 5:
      //      if (subframeP==8)
398
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
399
      break;
400

401 402
    case 6:
      //      if ((subframeP==1)||(subframeP==4)||(subframeP==6)||(subframeP==9))
403
      //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
404
      break;
405

406 407 408 409 410 411
    default:
      break;
    }
  }
}

412

413 414
// changes to pre-processor for eMTC

415 416 417
//------------------------------------------------------------------------------
void
schedule_ue_spec(
418 419 420
  module_id_t   module_idP,
  frame_t       frameP,
  sub_frame_t   subframeP,
421
  int*          mbsfn_flag
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
  uint8_t                        CC_id;
  int                            UE_id;
  unsigned char                  aggregation;
  mac_rlc_status_resp_t          rlc_status;
  unsigned char                  header_len_dcch=0, header_len_dcch_tmp=0; 
  unsigned char                  header_len_dtch=0, header_len_dtch_tmp=0, header_len_dtch_last=0; 
  unsigned char                  ta_len=0;
  unsigned char                  sdu_lcids[NB_RB_MAX],lcid,offset,num_sdus=0;
  uint16_t                       nb_rb,nb_rb_temp,nb_available_rb;
  uint16_t                       TBS,j,sdu_lengths[NB_RB_MAX],rnti,padding=0,post_padding=0;
  unsigned char                  dlsch_buffer[MAX_DLSCH_PAYLOAD_BYTES];
  unsigned char                  round             = 0;
  unsigned char                  harq_pid          = 0;
  eNB_UE_STATS                   *eNB_UE_stats     = NULL;
  uint16_t                       sdu_length_total = 0;

  eNB_MAC_INST                   *eNB      = RC.mac[module_idP];
  COMMON_channels_t              *cc       = eNB->common_channels;
  UE_list_t                      *UE_list  = &eNB->UE_list;
  int                            continue_flag=0;
  int32_t                        normalized_rx_power, target_rx_power;
  int32_t                        tpc=1;
  static int32_t                 tpc_accumulated=0;
  UE_sched_ctrl                  *ue_sched_ctl;
  int                            mcs;
  int                            i;
  int                            min_rb_unit[MAX_NUM_CCs];
  int                            N_RB_DL[MAX_NUM_CCs];
  int                            total_nb_available_rb[MAX_NUM_CCs];
  int                            N_RBG[MAX_NUM_CCs];
457
  nfapi_dl_config_request_body_t *dl_req;
458
  nfapi_dl_config_request_pdu_t  *dl_config_pdu;
459
  int                            tdd_sfa;
460

461
#if 0
462
  if (UE_list->head==-1) {
463
    return;
464
  }
465
#endif
466

467
  start_meas(&eNB->schedule_dlsch);
gauthier's avatar
gauthier committed
468
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_SCHEDULE_DLSCH,VCD_FUNCTION_IN);
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

  // for TDD: check that we have to act here, otherwise return
  if (cc[0].tdd_Config) {
    tdd_sfa = cc[0].tdd_Config->subframeAssignment;
    switch (subframeP) {
    case 0:
      // always continue
       break;
    case 1:
      return;
	break;
    case 2:
      return;
      break;
    case 3:
      if ((tdd_sfa!=2) && (tdd_sfa!=5)) return;
      break;
    case 4:
      if ((tdd_sfa!=1)&&(tdd_sfa!=2)&&(tdd_sfa!=4)&&(tdd_sfa!=5)) return;
      break;
    case 5:
      break;
    case 6:
    case 7:
      if ((tdd_sfa!=1)&&(tdd_sfa!=2)&&(tdd_sfa!=4)&&(tdd_sfa!=5)) return;
      break;
    case 8:
      if ((tdd_sfa!=2)&&(tdd_sfa!=3)&&(tdd_sfa!=4)&&(tdd_sfa!=5)) return;
      break;
    case 9:
      if ((tdd_sfa!=1)&&(tdd_sfa!=3)&&(tdd_sfa!=4)&&(tdd_sfa!=6)) return;
      break;
   
    }
  }
Cedric Roux's avatar
Cedric Roux committed
505

506
  //weight = get_ue_weight(module_idP,UE_id);
507
  aggregation = 2; 
508
  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
knopp's avatar
knopp committed
509
    N_RB_DL[CC_id] = to_prb(cc[CC_id].mib->message.dl_Bandwidth);
510
    min_rb_unit[CC_id]=get_min_rb_unit(module_idP,CC_id);
511
    // get number of PRBs less those used by common channels
knopp's avatar
knopp committed
512 513 514
    total_nb_available_rb[CC_id] = N_RB_DL[CC_id];
    for (i=0;i<N_RB_DL[CC_id];i++)
      if (cc[CC_id].vrb_map[i]!=0)
515 516
	total_nb_available_rb[CC_id]--;

knopp's avatar
knopp committed
517
    N_RBG[CC_id] = to_rbg(cc[CC_id].mib->message.dl_Bandwidth);
518

519
    // store the global enb stats:
knopp's avatar
knopp committed
520 521
    eNB->eNB_stats[CC_id].num_dlactive_UEs      =  UE_list->num_UEs;
    eNB->eNB_stats[CC_id].available_prbs        =  total_nb_available_rb[CC_id];
522
    eNB->eNB_stats[CC_id].total_available_prbs +=  total_nb_available_rb[CC_id];
knopp's avatar
knopp committed
523 524
    eNB->eNB_stats[CC_id].dlsch_bytes_tx        = 0;
    eNB->eNB_stats[CC_id].dlsch_pdus_tx         = 0;
525
  }
526

527
  /// CALLING Pre_Processor for downlink scheduling (Returns estimation of RBs required by each UE and the allocation on sub-band)
528

gauthier's avatar
gauthier committed
529
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR,VCD_FUNCTION_IN);
530
  start_meas(&eNB->schedule_dlsch_preprocessor);
531
  dlsch_scheduler_pre_processor(module_idP,
532 533 534 535
                                frameP,
                                subframeP,
                                N_RBG,
                                mbsfn_flag);
536
  stop_meas(&eNB->schedule_dlsch_preprocessor);
gauthier's avatar
gauthier committed
537
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR,VCD_FUNCTION_OUT);
538

539
  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
540
    LOG_D(MAC, "doing schedule_ue_spec for CC_id %d\n",CC_id);
541

542 543
    dl_req        = &eNB->DL_req[CC_id].dl_config_request_body;

544 545
    if (mbsfn_flag[CC_id]>0)
      continue;
546 547

    for (UE_id=UE_list->head; UE_id>=0; UE_id=UE_list->next[UE_id]) {
548
      continue_flag=0; // reset the flag to allow allocation for the remaining UEs
549
      rnti = UE_RNTI(module_idP,UE_id);
550
      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
551
      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
552

553

554
      if (rnti==NOT_A_RNTI) {
555 556
        LOG_D(MAC,"Cannot find rnti for UE_id %d (num_UEs %d)\n",UE_id,UE_list->num_UEs);
        continue_flag=1;
557
      }
558

559
      if (eNB_UE_stats==NULL) {
560 561
        LOG_D(MAC,"[eNB] Cannot find eNB_UE_stats\n");
        continue_flag=1;
562
      }
563 564

      if (continue_flag != 1){
565
        switch(get_tmode(module_idP,CC_id,UE_id)){
566 567 568 569
        case 1:
        case 2:
        case 7:
	  aggregation = get_aggregation(get_bw_index(module_idP,CC_id), 
Cedric Roux's avatar
Cedric Roux committed
570
					ue_sched_ctl->dl_cqi[CC_id],
571
					format1);
572 573 574
	  break;
        case 3:
	  aggregation = get_aggregation(get_bw_index(module_idP,CC_id), 
Cedric Roux's avatar
Cedric Roux committed
575
					ue_sched_ctl->dl_cqi[CC_id],
576
					format2A);
577 578
	  break;
        default:
579
	  LOG_W(MAC,"Unsupported transmission mode %d\n", get_tmode(module_idP,CC_id,UE_id));
580 581 582 583
	  aggregation = 2;
        }
      } /* if (continue_flag != 1 */

584
      if ((ue_sched_ctl->pre_nb_available_rbs[CC_id] == 0) ||  // no RBs allocated 
585
	  CCE_allocation_infeasible(module_idP,CC_id,1,subframeP,aggregation,rnti)
586
	  ) {
587
        LOG_D(MAC,"[eNB %d] Frame %d : no RB allocated for UE %d on CC_id %d: continue \n",
588
              module_idP, frameP, UE_id, CC_id);
589
        continue_flag=1; //to next user (there might be rbs availiable for other UEs in TM5
590
      }
591

knopp's avatar
knopp committed
592
      if (cc[CC_id].tdd_Config != NULL) { //TDD
593 594 595
        set_ue_dai (subframeP,
                    UE_id,
                    CC_id,
knopp's avatar
knopp committed
596
		    cc[CC_id].tdd_Config->subframeAssignment,
597 598
                    UE_list);
        // update UL DAI after DLSCH scheduling
knopp's avatar
knopp committed
599
        set_ul_DAI(module_idP,UE_id,CC_id,frameP,subframeP);
600 601
      }

602 603 604 605 606 607 608
      if (continue_flag == 1 ) {
        add_ue_dlsch_info(module_idP,
                          CC_id,
                          UE_id,
                          subframeP,
                          S_DL_NONE);
        continue;
609
      }
610

611 612
#warning RK->CR This old API call has to be revisited for FAPI, or logic must be changed
#if 0
Cedric Roux's avatar
Cedric Roux committed
613 614 615 616 617 618 619 620 621 622 623
      /* add "fake" DCI to have CCE_allocation_infeasible work properly for next allocations */
      /* if we don't add it, next allocations may succeed but overall allocations may fail */
      /* will be removed at the end of this function */
      add_ue_spec_dci(&eNB->common_channels[CC_id].DCI_pdu,
                      &(char[]){0},
                      rnti,
                      1,
                      aggregation,
                      1,
                      format1,
                      0);
624
#endif
Cedric Roux's avatar
Cedric Roux committed
625

626
      nb_available_rb = ue_sched_ctl->pre_nb_available_rbs[CC_id];
627 628 629 630 631 632

      if (cc->tdd_Config) harq_pid = ((frameP*10)+subframeP)%10;
      else harq_pid = ((frameP*10)+subframeP)&7;

      round = ue_sched_ctl->round[CC_id][harq_pid];

633
      UE_list->eNB_UE_stats[CC_id][UE_id].crnti= rnti;
634
      UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status=mac_eNB_get_rrc_status(module_idP,rnti);
635
      UE_list->eNB_UE_stats[CC_id][UE_id].harq_pid = harq_pid; 
636
      UE_list->eNB_UE_stats[CC_id][UE_id].harq_round = round;
637

638 639 640

      if (UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status < RRC_CONNECTED) continue;

641 642
      sdu_length_total=0;
      num_sdus=0;
643 644

      /*
645 646
      DevCheck(((eNB_UE_stats->dl_cqi < MIN_CQI_VALUE) || (eNB_UE_stats->dl_cqi > MAX_CQI_VALUE)),
      eNB_UE_stats->dl_cqi, MIN_CQI_VALUE, MAX_CQI_VALUE);
647
      */
Cedric Roux's avatar
Cedric Roux committed
648
      eNB_UE_stats->dlsch_mcs1 = cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
649
      eNB_UE_stats->dlsch_mcs1 = eNB_UE_stats->dlsch_mcs1;//cmin(eNB_UE_stats->dlsch_mcs1, openair_daq_vars.target_ue_dl_mcs);
650

651

652
      // store stats
Cedric Roux's avatar
Cedric Roux committed
653
      //UE_list->eNB_UE_stats[CC_id][UE_id].dl_cqi= eNB_UE_stats->dl_cqi;
654

655
      // initializing the rb allocation indicator for each UE
knopp's avatar
knopp committed
656
      for(j=0; j<N_RBG[CC_id]; j++) {
657
        UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = 0;
658 659
      }

660
      LOG_D(MAC,"[eNB %d] Frame %d: Scheduling UE %d on CC_id %d (rnti %x, harq_pid %d, round %d, rb %d, cqi %d, mcs %d, rrc %d)\n",
661
            module_idP, frameP, UE_id,CC_id,rnti,harq_pid, round,nb_available_rb,
Cedric Roux's avatar
Cedric Roux committed
662
            ue_sched_ctl->dl_cqi[CC_id], eNB_UE_stats->dlsch_mcs1,
663
	    UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status);
664 665 666



667 668
      /* process retransmission  */

669
      if (round != 8) {
670

671 672
        // get freq_allocation
        nb_rb = UE_list->UE_template[CC_id][UE_id].nb_rb[harq_pid];
673
	TBS = get_TBS_DL(UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid],nb_rb);
674 675

        if (nb_rb <= nb_available_rb) {
676
          if (cc[CC_id].tdd_Config != NULL) {
677 678 679 680
            UE_list->UE_template[CC_id][UE_id].DAI++;
            update_ul_dci(module_idP,CC_id,rnti,UE_list->UE_template[CC_id][UE_id].DAI);
            LOG_D(MAC,"DAI update: CC_id %d subframeP %d: UE %d, DAI %d\n", CC_id,subframeP,UE_id,UE_list->UE_template[CC_id][UE_id].DAI);
          }
681

682
          if(nb_rb == ue_sched_ctl->pre_nb_available_rbs[CC_id]) {
knopp's avatar
knopp committed
683
            for(j=0; j<N_RBG[CC_id]; j++) { // for indicating the rballoc for each sub-band
684
              UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];
685
            }
686 687 688 689
          } else {
            nb_rb_temp = nb_rb;
            j = 0;

knopp's avatar
knopp committed
690
            while((nb_rb_temp > 0) && (j<N_RBG[CC_id])) {
691
              if(ue_sched_ctl->rballoc_sub_UE[CC_id][j] == 1) {
Cedric Roux's avatar
Cedric Roux committed
692
                if (UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j]) printf("WARN: rballoc_subband not free for retrans?\n");
693
                UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];
694

knopp's avatar
knopp committed
695 696 697
                if((j == N_RBG[CC_id]-1) &&
                    ((N_RB_DL[CC_id] == 25)||
                     (N_RB_DL[CC_id] == 50))) {
698
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id]+1;
699
                } else {
700
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
701
                }
702 703 704 705 706 707 708
              }

              j = j+1;
            }
          }

          nb_available_rb -= nb_rb;
knopp's avatar
knopp committed
709 710 711
	  /*
          eNB->mu_mimo_mode[UE_id].pre_nb_available_rbs = nb_rb;
          eNB->mu_mimo_mode[UE_id].dl_pow_off = ue_sched_ctl->dl_pow_off[CC_id];
712

knopp's avatar
knopp committed
713 714
          for(j=0; j<N_RBG[CC_id]; j++) {
            eNB->mu_mimo_mode[UE_id].rballoc_sub[j] = UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j];
715
          }
knopp's avatar
knopp committed
716
	  */
717

718
          switch (get_tmode(module_idP,CC_id,UE_id)) {
719 720
          case 1:
          case 2:
Xiwen JIANG's avatar
Xiwen JIANG committed
721
          case 7:
722
          default:
723
	    dl_config_pdu                                                         = &dl_req->dl_config_pdu_list[dl_req->number_pdu]; 
724 725
	    memset((void*)dl_config_pdu,0,sizeof(nfapi_dl_config_request_pdu_t));
	    dl_config_pdu->pdu_type                                               = NFAPI_DL_CONFIG_DCI_DL_PDU_TYPE; 
726
	    dl_config_pdu->pdu_size                                               = (uint8_t)(2+sizeof(nfapi_dl_config_dci_dl_pdu));
727
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.dci_format                  = NFAPI_DL_DCI_FORMAT_1;
Cedric Roux's avatar
Cedric Roux committed
728
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level           = get_aggregation(get_bw_index(module_idP,CC_id),ue_sched_ctl->dl_cqi[CC_id],format1);
729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
	    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

	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.harq_process                = harq_pid;
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tpc                         = 1; // dont adjust power when retransmitting
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.new_data_indicator_1        = UE_list->UE_template[CC_id][UE_id].oldNDI[harq_pid];
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.mcs_1                       = UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid];
	    dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.redundancy_version_1        = round&3;

	    if (cc[CC_id].tdd_Config != NULL) { //TDD
	      dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.downlink_assignment_index = (UE_list->UE_template[CC_id][UE_id].DAI-1)&3;
	      LOG_D(MAC,"[eNB %d] Retransmission CC_id %d : harq_pid %d, round %d, dai %d, mcs %d\n",
		    module_idP,CC_id,harq_pid,round,
		    (UE_list->UE_template[CC_id][UE_id].DAI-1),
		    UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]);
	    } else {
	      LOG_D(MAC,"[eNB %d] Retransmission CC_id %d : harq_pid %d, round %d, mcs %d\n",
		    module_idP,CC_id,harq_pid,round,
		    UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]);
	      
	    }
	    if (!CCE_allocation_infeasible(module_idP,CC_id,0,subframeP,
					   dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.aggregation_level,
					   rnti)) {
754 755
	      dl_req->number_dci++;
	      dl_req->number_pdu++;
756

757 758
	      fill_nfapi_dlsch_config(eNB,dl_req,
				      TBS,
759
				      -1            /* retransmission, no pdu_index */,
760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781
				      rnti,
				      0, // type 0 allocation from 7.1.6 in 36.213
				      0, // virtual_resource_block_assignment_flag, unused here
				      0,          // resource_block_coding, to be filled in later
				      getQm(UE_list->UE_template[CC_id][UE_id].oldmcs1[harq_pid]),
				      round&3   , // redundancy version
				      1, // transport blocks
				      0, // transport block to codeword swap flag
				      cc[CC_id].p_eNB == 1 ? 0 : 1, // transmission_scheme
				      1, // number of layers
				      1, // number of subbands
			     //			     uint8_t codebook_index,
				      4, // UE category capacity
				      UE_list->UE_template[CC_id][UE_id].physicalConfigDedicated->pdsch_ConfigDedicated->p_a, 
				      0, // delta_power_offset for TM5
				      0, // ngap
				      0, // nprb
				      cc[CC_id].p_eNB == 1 ? 1 : 2, // transmission mode
				      0, //number of PRBs treated as one subband, not used here
				      0 // number of beamforming vectors, not used here
				      );

knopp's avatar
knopp committed
782
	      LOG_D(MAC,"Filled NFAPI configuration for DCI/DLSCH %d, retransmission round %d\n",eNB->pdu_index[CC_id],round);
783

784 785
	      program_dlsch_acknak(module_idP,CC_id,UE_id,frameP,subframeP,dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.cce_idx);
	      // No TX request for retransmission (check if null request for FAPI)
786 787
	    }
	    else {
788 789
	      LOG_W(MAC,"Frame %d, Subframe %d: Dropping DLSCH allocation for UE %d\%x, infeasible CCE allocation\n",
		    frameP,subframeP,UE_id,rnti);
790 791
	    }
	  }
792 793


794 795 796 797 798 799 800 801 802 803 804 805 806
	  add_ue_dlsch_info(module_idP,
			    CC_id,
			    UE_id,
			    subframeP,
			    S_DL_SCHEDULED);
	  
	  //eNB_UE_stats->dlsch_trials[round]++;
	  UE_list->eNB_UE_stats[CC_id][UE_id].num_retransmission+=1;
	  UE_list->eNB_UE_stats[CC_id][UE_id].rbs_used_retx=nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].total_rbs_used_retx+=nb_rb;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs1=eNB_UE_stats->dlsch_mcs1;
	  UE_list->eNB_UE_stats[CC_id][UE_id].dlsch_mcs2=eNB_UE_stats->dlsch_mcs1;
	} else {
807 808
          LOG_D(MAC,"[eNB %d] Frame %d CC_id %d : don't schedule UE %d, its retransmission takes more resources than we have\n",
                module_idP, frameP, CC_id, UE_id);
809 810
        }
      } else { /* This is a potentially new SDU opportunity */
811
	
812 813 814
        rlc_status.bytes_in_buffer = 0;
        // Now check RLC information to compute number of required RBs
        // get maximum TBS size for RLC request
815
        TBS = get_TBS_DL(eNB_UE_stats->dlsch_mcs1,nb_available_rb);
816 817 818
        // check first for RLC data on DCCH
        // add the length for  all the control elements (timing adv, drx, etc) : header + payload

819
        ta_len = (ue_sched_ctl->ta_update!=0) ? 2 : 0;
820 821 822 823 824 825

        header_len_dcch = 2; // 2 bytes DCCH SDU subheader

        if ( TBS-ta_len-header_len_dcch > 0 ) {
          rlc_status = mac_rlc_status_ind(
                         module_idP,
826
                         rnti,
827
			 module_idP,
828
                         frameP,
829
			 subframeP,
830 831 832 833 834 835 836 837
                         ENB_FLAG_YES,
                         MBMS_FLAG_NO,
                         DCCH,
                         (TBS-ta_len-header_len_dcch)); // transport block set size

          sdu_lengths[0]=0;

          if (rlc_status.bytes_in_buffer > 0) {  // There is DCCH to transmit
838 839
            LOG_D(MAC,"[eNB %d] Frame %d, DL-DCCH->DLSCH CC_id %d, Requesting %d bytes from RLC (RRC message)\n",
                  module_idP,frameP,CC_id,TBS-header_len_dcch);
knopp's avatar
knopp committed
840 841 842 843 844 845 846 847
            sdu_lengths[0] = mac_rlc_data_req(
					      module_idP,
					      rnti,
					      module_idP,
					      frameP,
					      ENB_FLAG_YES,
					      MBMS_FLAG_NO,
					      DCCH,
848
					      TBS, //not used
knopp's avatar
knopp committed
849
					      (char *)&dlsch_buffer[0]);
850

Cedric Roux's avatar
Cedric Roux committed
851 852 853
            T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP), T_INT(CC_id), T_INT(rnti), T_INT(frameP), T_INT(subframeP),
              T_INT(harq_pid), T_INT(DCCH), T_INT(sdu_lengths[0]));

854
            LOG_D(MAC,"[eNB %d][DCCH] CC_id %d Got %d bytes from RLC\n",module_idP,CC_id,sdu_lengths[0]);
855 856 857 858 859
            sdu_length_total = sdu_lengths[0];
            sdu_lcids[0] = DCCH;
            UE_list->eNB_UE_stats[CC_id][UE_id].num_pdu_tx[DCCH]+=1;
            UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[DCCH]+=sdu_lengths[0];
            num_sdus = 1;
860
#ifdef DEBUG_eNB_SCHEDULER
861
            LOG_T(MAC,"[eNB %d][DCCH] CC_id %d Got %d bytes :",module_idP,CC_id,sdu_lengths[0]);
862

863
            for (j=0; j<sdu_lengths[0]; j++) {
864
              LOG_T(MAC,"%x ",dlsch_buffer[j]);
865
            }
866 867 868 869 870 871 872 873

            LOG_T(MAC,"\n");
#endif
          } else {
            header_len_dcch = 0;
            sdu_length_total = 0;
          }
        }
knopp's avatar
knopp committed
874
	
875 876 877 878
        // check for DCCH1 and update header information (assume 2 byte sub-header)
        if (TBS-ta_len-header_len_dcch-sdu_length_total > 0 ) {
          rlc_status = mac_rlc_status_ind(
                         module_idP,
879
                         rnti,
880
			 module_idP,
881
                         frameP,
882
						 subframeP,
883 884 885 886 887
                         ENB_FLAG_YES,
                         MBMS_FLAG_NO,
                         DCCH+1,
                         (TBS-ta_len-header_len_dcch-sdu_length_total)); // transport block set size less allocations for timing advance and
          // DCCH SDU
knopp's avatar
knopp committed
888
	  sdu_lengths[num_sdus] = 0;
889 890

          if (rlc_status.bytes_in_buffer > 0) {
knopp's avatar
knopp committed
891
            LOG_D(MAC,"[eNB %d], Frame %d, DCCH1->DLSCH, CC_id %d, Requesting %d bytes from RLC (RRC message)\n",
892
                  module_idP,frameP,CC_id,TBS-header_len_dcch-sdu_length_total);
893 894
            sdu_lengths[num_sdus] += mac_rlc_data_req(
                                       module_idP,
895
                                       rnti,
896
				       module_idP,
897 898 899 900
                                       frameP,
                                       ENB_FLAG_YES,
                                       MBMS_FLAG_NO,
                                       DCCH+1,
901
									   TBS, //not used
knopp's avatar
knopp committed
902
                                       (char *)&dlsch_buffer[sdu_length_total]);
903

Cedric Roux's avatar
Cedric Roux committed
904 905 906
            T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP), T_INT(CC_id), T_INT(rnti), T_INT(frameP), T_INT(subframeP),
              T_INT(harq_pid), T_INT(DCCH+1), T_INT(sdu_lengths[num_sdus]));

907 908 909 910 911
            sdu_lcids[num_sdus] = DCCH1;
            sdu_length_total += sdu_lengths[num_sdus];
            header_len_dcch += 2;
            UE_list->eNB_UE_stats[CC_id][UE_id].num_pdu_tx[DCCH1]+=1;
            UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[DCCH1]+=sdu_lengths[num_sdus];
912
	    num_sdus++;
nikaeinn's avatar
nikaeinn committed
913 914
#ifdef DEBUG_eNB_SCHEDULER
            LOG_T(MAC,"[eNB %d][DCCH1] CC_id %d Got %d bytes :",module_idP,CC_id,sdu_lengths[num_sdus]);
915

nikaeinn's avatar
nikaeinn committed
916 917
            for (j=0; j<sdu_lengths[num_sdus]; j++) {
              LOG_T(MAC,"%x ",dlsch_buffer[j]);
918 919
            }

nikaeinn's avatar
nikaeinn committed
920 921
            LOG_T(MAC,"\n");
#endif
922

923
	  }
924 925
        }

926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943
	// assume the max dtch header size, and adjust it later
	header_len_dtch=0;
	header_len_dtch_last=0; // the header length of the last mac sdu
	// lcid has to be sorted before the actual allocation (similar struct as ue_list).
	for (lcid=NB_RB_MAX-1; lcid>=DTCH ; lcid--){
	  // TBD: check if the lcid is active
	  
	  header_len_dtch+=3; 
	  header_len_dtch_last=3;
	  LOG_D(MAC,"[eNB %d], Frame %d, DTCH%d->DLSCH, Checking RLC status (tbs %d, len %d)\n",
		module_idP,frameP,lcid,TBS,
		TBS-ta_len-header_len_dcch-sdu_length_total-header_len_dtch);
	  
	  if (TBS-ta_len-header_len_dcch-sdu_length_total-header_len_dtch > 0 ) { // NN: > 2 ? 
	    rlc_status = mac_rlc_status_ind(module_idP,
					    rnti,
					    module_idP,
					    frameP,
944
						subframeP,
945 946 947 948 949 950 951 952
					    ENB_FLAG_YES,
					    MBMS_FLAG_NO,
					    lcid,
					    TBS-ta_len-header_len_dcch-sdu_length_total-header_len_dtch);
	   

	    if (rlc_status.bytes_in_buffer > 0) {
	      
953
	      LOG_D(MAC,"[eNB %d][USER-PLANE DEFAULT DRB] Frame %d : DTCH->DLSCH, Requesting %d bytes from RLC (lcid %d total hdr len %d)\n",
954
		    module_idP,frameP,TBS-header_len_dcch-sdu_length_total-header_len_dtch,lcid, header_len_dtch);
955 956 957 958 959 960 961
	      sdu_lengths[num_sdus] = mac_rlc_data_req(module_idP,
						       rnti,
						       module_idP,
						       frameP,
						       ENB_FLAG_YES,
						       MBMS_FLAG_NO,
						       lcid,
962
							   TBS,	//not used
963
						       (char*)&dlsch_buffer[sdu_length_total]);
Aikaterini Trilyraki's avatar
Aikaterini Trilyraki committed
964 965 966
	      T(T_ENB_MAC_UE_DL_SDU, T_INT(module_idP), T_INT(CC_id), T_INT(rnti), T_INT(frameP), T_INT(subframeP),
              T_INT(harq_pid), T_INT(lcid), T_INT(sdu_lengths[num_sdus]));

967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003
	      LOG_D(MAC,"[eNB %d][USER-PLANE DEFAULT DRB] Got %d bytes for DTCH %d \n",module_idP,sdu_lengths[num_sdus],lcid);
	      sdu_lcids[num_sdus] = lcid;
	      sdu_length_total += sdu_lengths[num_sdus];
	      UE_list->eNB_UE_stats[CC_id][UE_id].num_pdu_tx[lcid]+=1;
	      UE_list->eNB_UE_stats[CC_id][UE_id].num_bytes_tx[lcid]+=sdu_lengths[num_sdus];
	      if (sdu_lengths[num_sdus] < 128) {
		header_len_dtch--;
		header_len_dtch_last--;
	      }
	      num_sdus++;
	    } // no data for this LCID
	    else {
	      header_len_dtch-=3;
	    }
	  } // no TBS left
	  else {
	    header_len_dtch-=3;
	    break; 
	  }
	}
	if (header_len_dtch == 0 )
	  header_len_dtch_last= 0;
	// there is at least one SDU 
	// if (num_sdus > 0 ){
	if ((sdu_length_total + header_len_dcch + header_len_dtch )> 0) {
	  
	  // Now compute number of required RBs for total sdu length
	  // Assume RAH format 2
	  // adjust  header lengths
	  header_len_dcch_tmp = header_len_dcch;
	  header_len_dtch_tmp = header_len_dtch;
	  if (header_len_dtch==0) {
	    header_len_dcch = (header_len_dcch >0) ? 1 : 0;//header_len_dcch;  // remove length field
	  } else {
	    header_len_dtch_last-=1; // now use it to find how many bytes has to be removed for the last MAC SDU 
	    header_len_dtch = (header_len_dtch > 0) ? header_len_dtch - header_len_dtch_last  :header_len_dtch;     // remove length field for the last SDU
	  }
1004 1005 1006

          mcs = eNB_UE_stats->dlsch_mcs1;

1007 1008 1009 1010 1011
          if (mcs==0) {
            nb_rb = 4;  // don't let the TBS get too small
          } else {
            nb_rb=min_rb_unit[CC_id];
          }
1012

1013
          TBS = get_TBS_DL(mcs,nb_rb);
1014 1015 1016 1017 1018 1019

          while (TBS < (sdu_length_total + header_len_dcch + header_len_dtch + ta_len))  {
            nb_rb += min_rb_unit[CC_id];  //

            if (nb_rb>nb_available_rb) { // if we've gone beyond the maximum number of RBs
              // (can happen if N_RB_DL is odd)
1020
              TBS = get_TBS_DL(eNB_UE_stats->dlsch_mcs1,nb_available_rb);
1021 1022 1023 1024
              nb_rb = nb_available_rb;
              break;
            }

1025
            TBS = get_TBS_DL(eNB_UE_stats->dlsch_mcs1,nb_rb);
1026 1027
          }

1028
          if(nb_rb == ue_sched_ctl->pre_nb_available_rbs[CC_id]) {
knopp's avatar
knopp committed
1029
            for(j=0; j<N_RBG[CC_id]; j++) { // for indicating the rballoc for each sub-band
1030
              UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];
1031 1032 1033 1034 1035
            }
          } else {
            nb_rb_temp = nb_rb;
            j = 0;

knopp's avatar
knopp committed
1036
            while((nb_rb_temp > 0) && (j<N_RBG[CC_id])) {
1037 1038
              if(ue_sched_ctl->rballoc_sub_UE[CC_id][j] == 1) {
                UE_list->UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j] = ue_sched_ctl->rballoc_sub_UE[CC_id][j];
1039

knopp's avatar
knopp committed
1040 1041 1042
                if ((j == N_RBG[CC_id]-1) &&
                    ((N_RB_DL[CC_id] == 25)||
                     (N_RB_DL[CC_id] == 50))) {
1043
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id]+1;
1044
                } else {
1045
                  nb_rb_temp = nb_rb_temp - min_rb_unit[CC_id];
1046
                }
1047 1048 1049 1050 1051 1052 1053 1054 1055
              }

              j = j+1;