eNB_scheduler_ulsch.c 60.9 KB
Newer Older
1 2 3 4 5
/*
 * 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
Cedric Roux's avatar
Cedric Roux committed
6
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
7 8 9 10 11 12 13 14 15 16 17 18 19 20
 * 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_ulsch.c
 * \brief eNB procedures for the ULSCH transport channel
24 25 26
 * \author Navid Nikaein and Raymond Knopp
 * \date 2010 - 2014
 * \email: navid.nikaein@eurecom.fr
nikaeinn's avatar
nikaeinn committed
27
 * \version 1.0
28 29 30 31
 * @ingroup _mac

 */

32 33
/* indented with: indent -kr eNB_scheduler_RA.c */

34 35


36 37 38
#include "LAYER2/MAC/mac.h"
#include "LAYER2/MAC/mac_proto.h"
#include "LAYER2/MAC/mac_extern.h"
39 40 41 42 43 44
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "OCG.h"
#include "OCG_extern.h"

45
#include "RRC/LTE/rrc_extern.h"
46 47
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"

48
#include "assertions.h"
49 50 51 52
//#include "LAYER2/MAC/pre_processor.c"
#include "pdcp.h"

#if defined(ENABLE_ITTI)
53
#include "intertask_interface.h"
54 55
#endif

56 57 58 59 60
#include "ENB_APP/flexran_agent_defs.h"
#include "flexran_agent_ran_api.h"
#include "header.pb-c.h"
#include "flexran.pb-c.h"
#include "flexran_agent_mac.h"
61
#include <dlfcn.h>
62

Cedric Roux's avatar
Cedric Roux committed
63 64
#include "T.h"

65
#define ENABLE_MAC_PAYLOAD_DEBUG
66 67
#define DEBUG_eNB_SCHEDULER 1

68 69 70 71 72 73 74 75
extern int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req);
extern void add_subframe(uint16_t *frameP, uint16_t *subframeP, int offset);
extern uint16_t sfnsf_add_subframe(uint16_t frameP, uint16_t subframeP, int offset);
extern int oai_nfapi_ul_config_req(nfapi_ul_config_request_t *ul_config_req);
extern uint8_t nfapi_mode;

extern uint8_t nfapi_mode;

76
// This table holds the allowable PRB sizes for ULSCH transmissions
77
uint8_t rb_table[34] =
knopp's avatar
knopp committed
78
  { 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 27, 30, 32,
79
    36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100
knopp's avatar
knopp committed
80
  };
81

82 83 84 85 86 87 88 89 90 91 92 93
/* number of active slices for  past and current time*/
int n_active_slices_uplink = 1;
int n_active_slices_current_uplink = 1;

/* RB share for each slice for past and current time*/
float avg_slice_percentage_uplink=0.25;
float slice_percentage_uplink[MAX_NUM_SLICES] = {1.0, 0.0, 0.0, 0.0};
float slice_percentage_current_uplink[MAX_NUM_SLICES] = {1.0, 0.0, 0.0, 0.0};
float total_slice_percentage_uplink = 0;
float total_slice_percentage_current_uplink = 0;

// MAX MCS for each slice for past and current time
94 95
int slice_maxmcs_uplink[MAX_NUM_SLICES] = {20, 20, 20, 20};
int slice_maxmcs_current_uplink[MAX_NUM_SLICES] = {20,20,20,20};
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112

/*resource blocks allowed*/
uint16_t         nb_rbs_allowed_slice_uplink[MAX_NUM_CCs][MAX_NUM_SLICES];
/*Slice Update */
int update_ul_scheduler[MAX_NUM_SLICES] = {1, 1, 1, 1};
int update_ul_scheduler_current[MAX_NUM_SLICES] = {1, 1, 1, 1};

/* name of available scheduler*/
char *ul_scheduler_type[MAX_NUM_SLICES] = {"schedule_ulsch_rnti",
					   "schedule_ulsch_rnti",
					   "schedule_ulsch_rnti",
					   "schedule_ulsch_rnti"
};

/* Slice Function Pointer */
slice_scheduler_ul slice_sched_ul[MAX_NUM_SLICES] = {0};

113 114 115 116 117 118 119 120 121
void
rx_sdu(const module_id_t enb_mod_idP,
       const int CC_idP,
       const frame_t frameP,
       const sub_frame_t subframeP,
       const rnti_t rntiP,
       uint8_t * sduP,
       const uint16_t sdu_lenP,
       const uint16_t timing_advance, const uint8_t ul_cqi)
Cedric Roux's avatar
Cedric Roux committed
122
{
knopp's avatar
knopp committed
123 124 125 126 127 128 129 130 131 132
  int current_rnti = rntiP;
  unsigned char rx_ces[MAX_NUM_CE], num_ce, num_sdu, i, *payload_ptr;
  unsigned char rx_lcids[NB_RB_MAX];
  unsigned short rx_lengths[NB_RB_MAX];
  int UE_id = find_UE_id(enb_mod_idP, current_rnti);
  int RA_id;
  int ii, j;
  eNB_MAC_INST *mac = RC.mac[enb_mod_idP];
  int harq_pid =
    subframe2harqpid(&mac->common_channels[CC_idP], frameP, subframeP);
133
  int lcgid_updated[4] = {0, 0, 0, 0};
knopp's avatar
knopp committed
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

  UE_list_t *UE_list = &mac->UE_list;
  int crnti_rx = 0;
  RA_t *ra =
    (RA_t *) & RC.mac[enb_mod_idP]->common_channels[CC_idP].ra[0];
  int first_rb = 0;

  start_meas(&mac->rx_ulsch_sdu);

  if ((UE_id > NUMBER_OF_UE_MAX) || (UE_id == -1))
    for (ii = 0; ii < NB_RB_MAX; ii++) {
      rx_lengths[ii] = 0;
    }

  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
    (VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU, 1);
  if (opt_enabled == 1) {
    trace_pdu(0, sduP, sdu_lenP, 0, 3, current_rnti, frameP, subframeP,
	      0, 0);
    LOG_D(OPT, "[eNB %d][ULSCH] Frame %d  rnti %x  with size %d\n",
	  enb_mod_idP, frameP, current_rnti, sdu_lenP);
  }

  if (UE_id != -1) {
    LOG_D(MAC,
	  "[eNB %d][PUSCH %d] CC_id %d Received ULSCH sdu round %d from PHY (rnti %x, UE_id %d) ul_cqi %d\n",
	  enb_mod_idP, harq_pid, CC_idP,
	  UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid],
	  current_rnti, UE_id, ul_cqi);

    AssertFatal(UE_list->UE_sched_ctrl[UE_id].
		round_UL[CC_idP][harq_pid] < 8, "round >= 8\n");
    if (sduP != NULL) {
      UE_list->UE_sched_ctrl[UE_id].ul_inactivity_timer = 0;
      UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 0;
      UE_list->UE_sched_ctrl[UE_id].ul_scheduled &= (~(1 << harq_pid));
      /* Update with smoothing: 3/4 of old value and 1/4 of new.
       * This is the logic that was done in the function
       * lte_est_timing_advance_pusch, maybe it's not necessary?
       * maybe it's even not correct at all?
       */
      UE_list->UE_sched_ctrl[UE_id].ta_update =	(UE_list->UE_sched_ctrl[UE_id].ta_update * 3 + timing_advance) / 4;
      UE_list->UE_sched_ctrl[UE_id].pusch_snr[CC_idP] = ul_cqi;
      UE_list->UE_sched_ctrl[UE_id].ul_consecutive_errors = 0;
      first_rb = UE_list->UE_template[CC_idP][UE_id].first_rb_ul[harq_pid];

      if (UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync > 0) {
	UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync = 0;
	mac_eNB_rrc_ul_in_sync(enb_mod_idP, CC_idP, frameP,
			       subframeP, UE_RNTI(enb_mod_idP,
						  UE_id));
      }
186 187 188 189 190

      /* update scheduled bytes */
      UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes -= UE_list->UE_template[CC_idP][UE_id].TBS_UL[harq_pid];
      if (UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes < 0)
        UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes = 0;
knopp's avatar
knopp committed
191 192 193 194 195 196 197 198 199 200 201 202 203
    } else {		// we've got an error
      LOG_D(MAC,
	    "[eNB %d][PUSCH %d] CC_id %d ULSCH in error in round %d, ul_cqi %d\n",
	    enb_mod_idP, harq_pid, CC_idP,
	    UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid],
	    ul_cqi);

      //      AssertFatal(1==0,"ulsch in error\n");
      if (UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] == 3) {
	UE_list->UE_sched_ctrl[UE_id].ul_scheduled &= (~(1 << harq_pid));
	UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] = 0;
	if (UE_list->UE_sched_ctrl[UE_id].ul_consecutive_errors++ == 10)
	  UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 1;
204 205 206 207 208

        /* update scheduled bytes */
        UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes -= UE_list->UE_template[CC_idP][UE_id].TBS_UL[harq_pid];
        if (UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes < 0)
          UE_list->UE_template[CC_idP][UE_id].scheduled_ul_bytes = 0;
knopp's avatar
knopp committed
209 210
      } else
	UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid]++;
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234

      first_rb = UE_list->UE_template[CC_idP][UE_id].first_rb_ul[harq_pid];

      // Program NACK for PHICH
      LOG_D(MAC,
	"Programming PHICH NACK for rnti %x harq_pid %d (first_rb %d)\n",
	current_rnti, harq_pid, first_rb);
      nfapi_hi_dci0_request_t *hi_dci0_req = &mac->HI_DCI0_req[CC_idP];
      nfapi_hi_dci0_request_body_t *hi_dci0_req_body = &hi_dci0_req->hi_dci0_request_body;
      nfapi_hi_dci0_request_pdu_t *hi_dci0_pdu =
        &hi_dci0_req_body->hi_dci0_pdu_list[hi_dci0_req_body->number_of_dci + hi_dci0_req_body->number_of_hi];
      memset((void *) hi_dci0_pdu, 0, sizeof(nfapi_hi_dci0_request_pdu_t));
      hi_dci0_pdu->pdu_type = NFAPI_HI_DCI0_HI_PDU_TYPE;
      hi_dci0_pdu->pdu_size = 2 + sizeof(nfapi_hi_dci0_hi_pdu);
      hi_dci0_pdu->hi_pdu.hi_pdu_rel8.tl.tag = NFAPI_HI_DCI0_REQUEST_HI_PDU_REL8_TAG;
      hi_dci0_pdu->hi_pdu.hi_pdu_rel8.resource_block_start = first_rb;
      hi_dci0_pdu->hi_pdu.hi_pdu_rel8.cyclic_shift_2_for_drms = 0;
      hi_dci0_pdu->hi_pdu.hi_pdu_rel8.hi_value = 0;
      hi_dci0_req_body->number_of_hi++;
      hi_dci0_req_body->sfnsf = sfnsf_add_subframe(frameP,subframeP, 0);
      hi_dci0_req_body->tl.tag = NFAPI_HI_DCI0_REQUEST_BODY_TAG;
      hi_dci0_req->sfn_sf = sfnsf_add_subframe(frameP,subframeP, 4);
      hi_dci0_req->header.message_id = NFAPI_HI_DCI0_REQUEST;

knopp's avatar
knopp committed
235
      return;
236

Florian Kaltenberger's avatar
Florian Kaltenberger committed
237
    }
knopp's avatar
knopp committed
238 239 240 241 242 243 244 245
  } else if ((RA_id = find_RA_id(enb_mod_idP, CC_idP, current_rnti)) != -1) {	// Check if this is an RA process for the rnti
    AssertFatal(mac->common_channels[CC_idP].
		radioResourceConfigCommon->rach_ConfigCommon.
		maxHARQ_Msg3Tx > 1,
		"maxHARQ %d should be greater than 1\n",
		(int) mac->common_channels[CC_idP].
		radioResourceConfigCommon->rach_ConfigCommon.
		maxHARQ_Msg3Tx);
246

knopp's avatar
knopp committed
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
    LOG_D(MAC,
	  "[eNB %d][PUSCH %d] CC_id %d [RAPROC Msg3] Received ULSCH sdu round %d from PHY (rnti %x, RA_id %d) ul_cqi %d\n",
	  enb_mod_idP, harq_pid, CC_idP, ra[RA_id].msg3_round,
	  current_rnti, RA_id, ul_cqi);

    first_rb = ra->msg3_first_rb;

    if (sduP == NULL) {	// we've got an error on Msg3
      LOG_D(MAC,
	    "[eNB %d] CC_id %d, RA %d ULSCH in error in round %d/%d\n",
	    enb_mod_idP, CC_idP, RA_id,
	    ra[RA_id].msg3_round,
	    (int) mac->common_channels[CC_idP].
	    radioResourceConfigCommon->rach_ConfigCommon.
	    maxHARQ_Msg3Tx);
      if (ra[RA_id].msg3_round == mac->common_channels[CC_idP].radioResourceConfigCommon->rach_ConfigCommon.maxHARQ_Msg3Tx - 1) {
	cancel_ra_proc(enb_mod_idP, CC_idP, frameP, current_rnti);
      }

      else {
	first_rb = UE_list->UE_template[CC_idP][UE_id].first_rb_ul[harq_pid];
	ra[RA_id].msg3_round++;
	// prepare handling of retransmission
	ra[RA_id].Msg3_frame    = (ra[RA_id].Msg3_frame + ((ra[RA_id].Msg3_subframe > 1) ? 1 : 0)) % 1024;
	ra[RA_id].Msg3_subframe = (ra[RA_id].Msg3_subframe + 8) % 10;
	add_msg3(enb_mod_idP, CC_idP, &ra[RA_id], frameP, subframeP);
      }
274 275 276

      /* TODO: program NACK for PHICH? */

knopp's avatar
knopp committed
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
      return;
    }
  } else {
    LOG_W(MAC,
	  "Cannot find UE or RA corresponding to ULSCH rnti %x, dropping it\n",
	  current_rnti);
    return;
  }
  payload_ptr = parse_ulsch_header(sduP, &num_ce, &num_sdu, rx_ces, rx_lcids, rx_lengths, sdu_lenP);

  T(T_ENB_MAC_UE_UL_PDU, T_INT(enb_mod_idP), T_INT(CC_idP),
    T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
    T_INT(harq_pid), T_INT(sdu_lenP), T_INT(num_ce), T_INT(num_sdu));
  T(T_ENB_MAC_UE_UL_PDU_WITH_DATA, T_INT(enb_mod_idP), T_INT(CC_idP),
    T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
    T_INT(harq_pid), T_INT(sdu_lenP), T_INT(num_ce), T_INT(num_sdu),
    T_BUFFER(sduP, sdu_lenP));

  mac->eNB_stats[CC_idP].ulsch_bytes_rx = sdu_lenP;
  mac->eNB_stats[CC_idP].total_ulsch_bytes_rx += sdu_lenP;
  mac->eNB_stats[CC_idP].total_ulsch_pdus_rx += 1;

  UE_list->UE_sched_ctrl[UE_id].round_UL[CC_idP][harq_pid] = 0;

  // control element
  for (i = 0; i < num_ce; i++) {

    T(T_ENB_MAC_UE_UL_CE, T_INT(enb_mod_idP), T_INT(CC_idP),
      T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
      T_INT(rx_ces[i]));
307

knopp's avatar
knopp committed
308 309 310 311 312
    switch (rx_ces[i]) {	// implement and process BSR + CRNTI +
    case POWER_HEADROOM:
      if (UE_id != -1) {
	UE_list->UE_template[CC_idP][UE_id].phr_info =
	  (payload_ptr[0] & 0x3f) - PHR_MAPPING_OFFSET;
313
	LOG_D(MAC,
knopp's avatar
knopp committed
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
	      "[eNB %d] CC_id %d MAC CE_LCID %d : Received PHR PH = %d (db)\n",
	      enb_mod_idP, CC_idP, rx_ces[i],
	      UE_list->UE_template[CC_idP][UE_id].phr_info);
	UE_list->UE_template[CC_idP][UE_id].phr_info_configured =
	  1;
	UE_list->UE_sched_ctrl[UE_id].phr_received = 1;
      }
      payload_ptr += sizeof(POWER_HEADROOM_CMD);
      break;

    case CRNTI:
      {
	int old_rnti =
	  (((uint16_t) payload_ptr[0]) << 8) + payload_ptr[1];
	int old_UE_id = find_UE_id(enb_mod_idP, old_rnti);
	LOG_D(MAC,
	      "[eNB %d] Frame %d, Subframe %d CC_id %d MAC CE_LCID %d (ce %d/%d): CRNTI %x (UE_id %d) in Msg3\n",
	      enb_mod_idP, frameP, subframeP, CC_idP, rx_ces[i], i,
	      num_ce, old_rnti, old_UE_id);
	/* receiving CRNTI means that the current rnti has to go away */
	cancel_ra_proc(enb_mod_idP, CC_idP, frameP,
		       current_rnti);
	if (old_UE_id != -1) {
	  /* TODO: if the UE did random access (followed by a MAC uplink with
	   * CRNTI) because none of its scheduling request was granted, then
	   * according to 36.321 5.4.4 the UE's MAC will notify RRC to release
	   * PUCCH/SRS. According to 36.331 5.3.13 the UE will then apply
	   * default configuration for CQI reporting and scheduling requests,
	   * which basically means that the CQI requests won't work anymore and
	   * that the UE won't do any scheduling request anymore as long as the
	   * eNB doesn't reconfigure the UE.
	   * We have to take care of this. As the code is, nothing is done and
	   * the UE state in the eNB is wrong.
	   */
	  UE_id = old_UE_id;
	  UE_list->UE_sched_ctrl[UE_id].ul_inactivity_timer = 0;
	  UE_list->UE_sched_ctrl[UE_id].ul_failure_timer = 0;
	  if (UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync > 0) {
	    UE_list->UE_sched_ctrl[UE_id].ul_out_of_sync = 0;
	    mac_eNB_rrc_ul_in_sync(enb_mod_idP, CC_idP, frameP,
				   subframeP, old_rnti);
	  }
	  current_rnti = old_rnti;
357
	}
knopp's avatar
knopp committed
358 359 360 361 362 363 364 365 366 367
	crnti_rx = 1;
	payload_ptr += 2;
	break;
      }

    case TRUNCATED_BSR:
    case SHORT_BSR:
      {
	uint8_t lcgid;
	lcgid = (payload_ptr[0] >> 6);
368 369

	LOG_D(MAC,
knopp's avatar
knopp committed
370 371 372 373 374 375 376 377 378 379
	      "[eNB %d] CC_id %d MAC CE_LCID %d : Received short BSR LCGID = %u bsr = %d\n",
	      enb_mod_idP, CC_idP, rx_ces[i], lcgid,
	      payload_ptr[0] & 0x3f);

	if (crnti_rx == 1)
	  LOG_D(MAC,
		"[eNB %d] CC_id %d MAC CE_LCID %d : Received short BSR LCGID = %u bsr = %d\n",
		enb_mod_idP, CC_idP, rx_ces[i], lcgid,
		payload_ptr[0] & 0x3f);
	if (UE_id != -1) {
380
          int bsr = payload_ptr[0] & 0x3f;
381

382
          lcgid_updated[lcgid] = 1;
383

384 385
          // update buffer info
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[lcgid] = BSR_TABLE[bsr];
386

387 388 389 390 391 392
          UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer =
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[0] +
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[1] +
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[2] +
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[3];
          //UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer += UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer / 4;
393

knopp's avatar
knopp committed
394 395 396 397 398 399 400 401 402
	  RC.eNB[enb_mod_idP][CC_idP]->pusch_stats_bsr[UE_id][(frameP * 10) + subframeP] = (payload_ptr[0] & 0x3f);
	  if (UE_id == UE_list->head)
	    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(VCD_SIGNAL_DUMPER_VARIABLES_UE0_BSR,
						    RC.eNB[enb_mod_idP][CC_idP]->pusch_stats_bsr
						    [UE_id][(frameP * 10) + subframeP]);
	  if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[lcgid] == 0) {
	    UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[lcgid] = frameP;
	  }
	  if (mac_eNB_get_rrc_status(enb_mod_idP,UE_RNTI(enb_mod_idP, UE_id)) < RRC_CONNECTED)
403
	    LOG_D(MAC,
404
		  "[eNB %d] CC_id %d MAC CE_LCID %d : estimated_ul_buffer = %d (lcg increment %d)\n",
knopp's avatar
knopp committed
405
		  enb_mod_idP, CC_idP, rx_ces[i],
406 407
		  UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer,
		  UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[lcgid]);
knopp's avatar
knopp committed
408
	} else {
409 410

	}
knopp's avatar
knopp committed
411 412 413 414 415 416
	payload_ptr += 1;	//sizeof(SHORT_BSR); // fixme
      }
      break;

    case LONG_BSR:
      if (UE_id != -1) {
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
        int bsr0 = (payload_ptr[0] & 0xFC) >> 2;
        int bsr1 = ((payload_ptr[0] & 0x03) << 4) | ((payload_ptr[1] & 0xF0) >> 4);
        int bsr2 = ((payload_ptr[1] & 0x0F) << 2) | ((payload_ptr[2] & 0xC0) >> 6);
        int bsr3 = payload_ptr[2] & 0x3F;

        lcgid_updated[0] = 1;
        lcgid_updated[1] = 1;
        lcgid_updated[2] = 1;
        lcgid_updated[3] = 1;

        // update buffer info
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0] = BSR_TABLE[bsr0];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1] = BSR_TABLE[bsr1];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2] = BSR_TABLE[bsr2];
        UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3] = BSR_TABLE[bsr3];

        UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer =
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[0] +
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[1] +
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[2] +
            UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[3];
        //UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer += UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer / 4;

        LOG_D(MAC,
              "[eNB %d] CC_id %d MAC CE_LCID %d: Received long BSR. Size is LCGID0 = %u LCGID1 = "
              "%u LCGID2 = %u LCGID3 = %u\n", enb_mod_idP, CC_idP,
              rx_ces[i],
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0],
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1],
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2],
              UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3]);
        if (crnti_rx == 1)
          LOG_D(MAC,
                "[eNB %d] CC_id %d MAC CE_LCID %d: Received long BSR. Size is LCGID0 = %u LCGID1 = "
                "%u LCGID2 = %u LCGID3 = %u\n", enb_mod_idP,
                CC_idP, rx_ces[i],
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0],
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1],
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2],
                UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3]);

	if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID0] == 0) {
knopp's avatar
knopp committed
459 460 461 462
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0] = 0;
	} else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0] == 0) {
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID0] = frameP;
	}
463

464
	if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID1] == 0) {
knopp's avatar
knopp committed
465 466 467
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1] = 0;
	} else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1] == 0) {
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID1] = frameP;
468 469
	}

470
	if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID2] == 0) {
knopp's avatar
knopp committed
471 472 473 474
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2] = 0;
	} else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2] == 0) {
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID2] = frameP;
	}
475

476
	if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[LCGID3] == 0) {
knopp's avatar
knopp committed
477 478 479
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3] = 0;
	} else if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3] == 0) {
	  UE_list->UE_template[CC_idP][UE_id].ul_buffer_creation_time[LCGID3] = frameP;
480 481

	}
knopp's avatar
knopp committed
482 483 484 485 486 487 488 489 490 491
      }

      payload_ptr += 3;	////sizeof(LONG_BSR);
      break;

    default:
      LOG_E(MAC,
	    "[eNB %d] CC_id %d Received unknown MAC header (0x%02x)\n",
	    enb_mod_idP, CC_idP, rx_ces[i]);
      break;
492
    }
knopp's avatar
knopp committed
493
  }
494

knopp's avatar
knopp committed
495 496 497 498 499
  for (i = 0; i < num_sdu; i++) {
    LOG_D(MAC, "SDU Number %d MAC Subheader SDU_LCID %d, length %d\n",
	  i, rx_lcids[i], rx_lengths[i]);

    T(T_ENB_MAC_UE_UL_SDU, T_INT(enb_mod_idP), T_INT(CC_idP),
500
      T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
knopp's avatar
knopp committed
501 502
      T_INT(rx_lcids[i]), T_INT(rx_lengths[i]));
    T(T_ENB_MAC_UE_UL_SDU_WITH_DATA, T_INT(enb_mod_idP), T_INT(CC_idP),
503
      T_INT(current_rnti), T_INT(frameP), T_INT(subframeP),
knopp's avatar
knopp committed
504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
      T_INT(rx_lcids[i]), T_INT(rx_lengths[i]), T_BUFFER(payload_ptr,
							 rx_lengths
							 [i]));

    switch (rx_lcids[i]) {
    case CCCH:
      if (rx_lengths[i] > CCCH_PAYLOAD_SIZE_MAX) {
	LOG_E(MAC,
	      "[eNB %d/%d] frame %d received CCCH of size %d (too big, maximum allowed is %d, sdu_len %d), dropping packet\n",
	      enb_mod_idP, CC_idP, frameP, rx_lengths[i],
	      CCCH_PAYLOAD_SIZE_MAX, sdu_lenP);
	break;
      }
      LOG_D(MAC,
	    "[eNB %d][RAPROC] CC_id %d Frame %d, Received CCCH:  %x.%x.%x.%x.%x.%x, Terminating RA procedure for UE rnti %x\n",
	    enb_mod_idP, CC_idP, frameP, payload_ptr[0],
	    payload_ptr[1], payload_ptr[2], payload_ptr[3],
	    payload_ptr[4], payload_ptr[5], current_rnti);
      VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_TERMINATE_RA_PROC, 1);
      VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_TERMINATE_RA_PROC, 0);
      for (ii = 0; ii < NB_RA_PROC_MAX; ii++) {
	RA_t *ra = &mac->common_channels[CC_idP].ra[ii];
526

knopp's avatar
knopp committed
527 528 529 530
	LOG_D(MAC,
	      "[mac %d][RAPROC] CC_id %d Checking proc %d : rnti (%x, %x), state %d\n",
	      enb_mod_idP, CC_idP, ii, ra->rnti,
	      current_rnti, ra->state);
531

knopp's avatar
knopp committed
532
	if ((ra->rnti == current_rnti) && (ra->state != IDLE)) {
533

knopp's avatar
knopp committed
534
	  //payload_ptr = parse_ulsch_header(msg3,&num_ce,&num_sdu,rx_ces,rx_lcids,rx_lengths,msg3_len);
535

knopp's avatar
knopp committed
536 537
	  if (UE_id < 0) {
	    memcpy(&ra->cont_res_id[0], payload_ptr, 6);
538
	    LOG_D(MAC,
knopp's avatar
knopp committed
539 540 541 542 543 544 545
		  "[eNB %d][RAPROC] CC_id %d Frame %d CCCH: Received Msg3: length %d, offset %ld\n",
		  enb_mod_idP, CC_idP, frameP, rx_lengths[i],
		  payload_ptr - sduP);

	    if ((UE_id = add_new_ue(enb_mod_idP, CC_idP,
				    mac->common_channels[CC_idP].
				    ra[ii].rnti, harq_pid
546
#ifdef Rel14
knopp's avatar
knopp committed
547 548 549
				    ,
				    mac->common_channels[CC_idP].
				    ra[ii].rach_resource_type
550
#endif
knopp's avatar
knopp committed
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597
				    )) == -1) {
	      AssertFatal(1 == 0,
			  "[MAC][eNB] Max user count reached\n");
	      // kill RA procedure
	    } else
	      LOG_D(MAC,
		    "[eNB %d][RAPROC] CC_id %d Frame %d Added user with rnti %x => UE %d\n",
		    enb_mod_idP, CC_idP, frameP, ra->rnti,
		    UE_id);
	  } else {
	    LOG_D(MAC,
		  "[eNB %d][RAPROC] CC_id %d Frame %d CCCH: Received Msg3 from already registered UE %d: length %d, offset %ld\n",
		  enb_mod_idP, CC_idP, frameP, UE_id,
		  rx_lengths[i], payload_ptr - sduP);
	    // kill RA procedure
	  }

	  mac_rrc_data_ind(enb_mod_idP,
			   CC_idP,
			   frameP, subframeP,
			   current_rnti,
			   CCCH,
			   (uint8_t *) payload_ptr,
			   rx_lengths[i],
			   0);


	  if (num_ce > 0) {	// handle msg3 which is not RRCConnectionRequest
	    //  process_ra_message(msg3,num_ce,rx_lcids,rx_ces);
	  }
	  // prepare transmission of Msg4
	  ra->state = MSG4;



	  // Program Msg4 PDCCH+DLSCH/MPDCCH transmission 4 subframes from now, // Check if this is ok for BL/CE, or if the rule is different
	  ra->Msg4_frame = frameP + ((subframeP > 5) ? 1 : 0);
	  ra->Msg4_subframe = (subframeP + 4) % 10;

	}		// if process is active
      }			// loop on RA processes

      break;

    case DCCH:
    case DCCH1:
      //      if(eNB_mac_inst[module_idP][CC_idP].Dcch_lchan[UE_id].Active==1){
Cedric Roux's avatar
Cedric Roux committed
598

gauthier's avatar
 
gauthier committed
599

knopp's avatar
 
knopp committed
600
#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
knopp's avatar
knopp committed
601 602 603 604 605 606
      LOG_T(MAC, "offset: %d\n",
	    (unsigned char) ((unsigned char *) payload_ptr - sduP));
      for (j = 0; j < 32; j++) {
	LOG_T(MAC, "%x ", payload_ptr[j]);
      }
      LOG_T(MAC, "\n");
knopp's avatar
 
knopp committed
607
#endif
gauthier's avatar
 
gauthier committed
608

knopp's avatar
knopp committed
609
      if (UE_id != -1) {
610 611 612 613 614 615 616 617 618 619 620 621 622 623
        if (lcgid_updated[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] == 0) {
	  // adjust buffer occupancy of the correponding logical channel group
	  if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] >= rx_lengths[i])
	    UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] -= rx_lengths[i];
	  else
	    UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] = 0;

          UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer =
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[0] +
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[1] +
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[2] +
          UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[3];
          //UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer += UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer / 4;
        }
624

knopp's avatar
knopp committed
625 626 627 628
	LOG_D(MAC,
	      "[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DCCH, received %d bytes form UE %d on LCID %d \n",
	      enb_mod_idP, CC_idP, frameP, rx_lengths[i], UE_id,
	      rx_lcids[i]);
629

knopp's avatar
knopp committed
630 631 632
	mac_rlc_data_ind(enb_mod_idP, current_rnti, enb_mod_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, rx_lcids[i], (char *) payload_ptr, rx_lengths[i], 1, NULL);	//(unsigned int*)crc_status);
	UE_list->eNB_UE_stats[CC_idP][UE_id].num_pdu_rx[rx_lcids[i]] += 1;
	UE_list->eNB_UE_stats[CC_idP][UE_id].num_bytes_rx[rx_lcids[i]] += rx_lengths[i];
633 634


knopp's avatar
knopp committed
635
      }
636

knopp's avatar
knopp committed
637 638 639
      /* UE_id != -1 */
      // }
      break;
640

knopp's avatar
knopp committed
641 642 643
      // all the DRBS
    case DTCH:
    default:
gauthier's avatar
 
gauthier committed
644

knopp's avatar
 
knopp committed
645
#if defined(ENABLE_MAC_PAYLOAD_DEBUG)
knopp's avatar
knopp committed
646 647 648 649 650 651
      LOG_T(MAC, "offset: %d\n",
	    (unsigned char) ((unsigned char *) payload_ptr - sduP));
      for (j = 0; j < 32; j++) {
	LOG_T(MAC, "%x ", payload_ptr[j]);
      }
      LOG_T(MAC, "\n");
652
#endif
knopp's avatar
knopp committed
653 654 655 656 657
      if (rx_lcids[i] < NB_RB_MAX) {
	LOG_D(MAC,
	      "[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d\n",
	      enb_mod_idP, CC_idP, frameP, rx_lengths[i], UE_id,
	      rx_lcids[i]);
658

knopp's avatar
knopp committed
659 660 661 662 663 664 665 666 667 668 669 670
	if (UE_id != -1) {
	  // adjust buffer occupancy of the correponding logical channel group
	  LOG_D(MAC,
		"[eNB %d] CC_id %d Frame %d : ULSCH -> UL-DTCH, received %d bytes from UE %d for lcid %d, removing from LCGID %ld, %d\n",
		enb_mod_idP, CC_idP, frameP, rx_lengths[i],
		UE_id, rx_lcids[i],
		UE_list->UE_template[CC_idP][UE_id].
		lcgidmap[rx_lcids[i]],
		UE_list->UE_template[CC_idP][UE_id].
		ul_buffer_info[UE_list->UE_template[CC_idP]
			       [UE_id].lcgidmap[rx_lcids[i]]]);

671 672 673 674 675 676 677 678 679 680 681 682 683 684
          if (lcgid_updated[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] == 0) {
	    if (UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] >= rx_lengths[i])
	      UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] -= rx_lengths[i];
	    else
	      UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[UE_list->UE_template[CC_idP][UE_id].lcgidmap[rx_lcids[i]]] = 0;

            UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer =
               UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[0] +
               UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[1] +
               UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[2] +
               UE_list->UE_template[CC_idP][UE_id].ul_buffer_info[3];
            //UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer += UE_list->UE_template[CC_idP][UE_id].estimated_ul_buffer / 4;
          }

knopp's avatar
knopp committed
685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702
	  if ((rx_lengths[i] < SCH_PAYLOAD_SIZE_MAX) && (rx_lengths[i] > 0)) {	// MAX SIZE OF transport block
	    mac_rlc_data_ind(enb_mod_idP, current_rnti, enb_mod_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, rx_lcids[i], (char *) payload_ptr, rx_lengths[i], 1, NULL);	//(unsigned int*)crc_status);

	    UE_list->eNB_UE_stats[CC_idP][UE_id].num_pdu_rx[rx_lcids[i]] += 1;
	    UE_list->eNB_UE_stats[CC_idP][UE_id].num_bytes_rx[rx_lcids[i]] += rx_lengths[i];
	    //clear uplane_inactivity_timer
	    UE_list->UE_sched_ctrl[UE_id].uplane_inactivity_timer = 0;
	  } else {	/* rx_length[i] */
	    UE_list->eNB_UE_stats[CC_idP][UE_id].num_errors_rx += 1;
	    LOG_E(MAC,
		  "[eNB %d] CC_id %d Frame %d : Max size of transport block reached LCID %d from UE %d ",
		  enb_mod_idP, CC_idP, frameP, rx_lcids[i],
		  UE_id);
	  }
	} else {	/*(UE_id != -1 */
	  LOG_E(MAC,
		"[eNB %d] CC_id %d Frame %d : received unsupported or unknown LCID %d from UE %d ",
		enb_mod_idP, CC_idP, frameP, rx_lcids[i], UE_id);
703
	}
knopp's avatar
knopp committed
704
      }
705

knopp's avatar
knopp committed
706
      break;
knopp's avatar
 
knopp committed
707
    }
Cedric Roux's avatar
Cedric Roux committed
708

knopp's avatar
knopp committed
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748
    payload_ptr += rx_lengths[i];
  }

  // Program ACK for PHICH
  LOG_D(MAC,
	"Programming PHICH ACK for rnti %x harq_pid %d (first_rb %d)\n",
	current_rnti, harq_pid, first_rb);
  nfapi_hi_dci0_request_t *hi_dci0_req = &mac->HI_DCI0_req[CC_idP];
  nfapi_hi_dci0_request_body_t *hi_dci0_req_body = &hi_dci0_req->hi_dci0_request_body;
  nfapi_hi_dci0_request_pdu_t *hi_dci0_pdu =
    &hi_dci0_req_body->hi_dci0_pdu_list[hi_dci0_req_body->number_of_dci + hi_dci0_req_body->number_of_hi];
  memset((void *) hi_dci0_pdu, 0, sizeof(nfapi_hi_dci0_request_pdu_t));
  hi_dci0_pdu->pdu_type = NFAPI_HI_DCI0_HI_PDU_TYPE;
  hi_dci0_pdu->pdu_size = 2 + sizeof(nfapi_hi_dci0_hi_pdu);
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.tl.tag = NFAPI_HI_DCI0_REQUEST_HI_PDU_REL8_TAG;
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.resource_block_start = first_rb;
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.cyclic_shift_2_for_drms = 0;
  hi_dci0_pdu->hi_pdu.hi_pdu_rel8.hi_value = 1;
  hi_dci0_req_body->number_of_hi++;
  hi_dci0_req_body->sfnsf = sfnsf_add_subframe(frameP,subframeP, 0);
  hi_dci0_req_body->tl.tag = NFAPI_HI_DCI0_REQUEST_BODY_TAG;
  hi_dci0_req->sfn_sf = sfnsf_add_subframe(frameP,subframeP, 4);
  hi_dci0_req->header.message_id = NFAPI_HI_DCI0_REQUEST;

  /* NN--> FK: we could either check the payload, or use a phy helper to detect a false msg3 */
  if ((num_sdu == 0) && (num_ce == 0)) {
    if (UE_id != -1)
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_num_errors_rx += 1;
    /*
      if (msg3_flagP != NULL) {
      if( *msg3_flagP == 1 ) {
      LOG_N(MAC,"[eNB %d] CC_id %d frame %d : false msg3 detection: signal phy to canceling RA and remove the UE\n", enb_mod_idP, CC_idP, frameP);
      *msg3_flagP=0;
      }
      } */
  } else {
    if (UE_id != -1) {
      UE_list->eNB_UE_stats[CC_idP][UE_id].pdu_bytes_rx        = sdu_lenP;
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_pdu_bytes_rx += sdu_lenP;
      UE_list->eNB_UE_stats[CC_idP][UE_id].total_num_pdus_rx  += 1;
roux's avatar
roux committed
749
    }
knopp's avatar
knopp committed
750
  }
751

knopp's avatar
knopp committed
752 753
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_SDU, 0);
  stop_meas(&mac->rx_ulsch_sdu);
knopp's avatar
 
knopp committed
754 755
}

756 757
uint32_t bytes_to_bsr_index(int32_t nbytes)
{
knopp's avatar
knopp committed
758
  uint32_t i = 0;
759

knopp's avatar
knopp committed
760 761 762
  if (nbytes < 0) {
    return (0);
  }
763

knopp's avatar
knopp committed
764 765 766
  while ((i < BSR_TABLE_SIZE) && (BSR_TABLE[i] <= nbytes)) {
    i++;
  }
767

knopp's avatar
knopp committed
768
  return (i - 1);
769 770
}

771 772 773
void
add_ue_ulsch_info(module_id_t module_idP, int CC_id, int UE_id,
		  sub_frame_t subframeP, UE_ULSCH_STATUS status)
774
{
knopp's avatar
knopp committed
775 776 777
  eNB_ulsch_info[module_idP][CC_id][UE_id].rnti     = UE_RNTI(module_idP, UE_id);
  eNB_ulsch_info[module_idP][CC_id][UE_id].subframe = subframeP;
  eNB_ulsch_info[module_idP][CC_id][UE_id].status   = status;
778

knopp's avatar
knopp committed
779
  eNB_ulsch_info[module_idP][CC_id][UE_id].serving_num++;
780 781 782
}

unsigned char *parse_ulsch_header(unsigned char *mac_header,
783 784 785 786 787 788
				  unsigned char *num_ce,
				  unsigned char *num_sdu,
				  unsigned char *rx_ces,
				  unsigned char *rx_lcids,
				  unsigned short *rx_lengths,
				  unsigned short tb_length)
789
{
knopp's avatar
knopp committed
790 791 792 793
  unsigned char not_done = 1, num_ces = 0, num_sdus =
    0, lcid, num_sdu_cnt;
  unsigned char *mac_header_ptr = mac_header;
  unsigned short length, ce_len = 0;
794

knopp's avatar
knopp committed
795
  while (not_done == 1) {
796

knopp's avatar
knopp committed
797 798 799
    if (((SCH_SUBHEADER_FIXED *) mac_header_ptr)->E == 0) {
      not_done = 0;
    }
800

knopp's avatar
knopp committed
801
    lcid = ((SCH_SUBHEADER_FIXED *) mac_header_ptr)->LCID;
802

knopp's avatar
knopp committed
803 804 805 806
    if (lcid < EXTENDED_POWER_HEADROOM) {
      if (not_done == 0) {	// last MAC SDU, length is implicit
	mac_header_ptr++;
	length = tb_length - (mac_header_ptr - mac_header) - ce_len;
807

knopp's avatar
knopp committed
808 809 810
	for (num_sdu_cnt = 0; num_sdu_cnt < num_sdus;
	     num_sdu_cnt++) {
	  length -= rx_lengths[num_sdu_cnt];
811
	}
knopp's avatar
knopp committed
812 813 814 815 816 817 818 819 820 821
      } else {
	if (((SCH_SUBHEADER_SHORT *) mac_header_ptr)->F == 0) {
	  length = ((SCH_SUBHEADER_SHORT *) mac_header_ptr)->L;
	  mac_header_ptr += 2;	//sizeof(SCH_SUBHEADER_SHORT);
	} else {	// F = 1
	  length =
	    ((((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_MSB &
	      0x7f) << 8) | (((SCH_SUBHEADER_LONG *)
			      mac_header_ptr)->L_LSB & 0xff);
	  mac_header_ptr += 3;	//sizeof(SCH_SUBHEADER_LONG);
822
	}
knopp's avatar
knopp committed
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
      }

      LOG_D(MAC,
	    "[eNB] sdu %d lcid %d tb_length %d length %d (offset now %ld)\n",
	    num_sdus, lcid, tb_length, length,
	    mac_header_ptr - mac_header);
      rx_lcids[num_sdus] = lcid;
      rx_lengths[num_sdus] = length;
      num_sdus++;
    } else {		// This is a control element subheader POWER_HEADROOM, BSR and CRNTI
      if (lcid == SHORT_PADDING) {
	mac_header_ptr++;
      } else {
	rx_ces[num_ces] = lcid;
	num_ces++;
	mac_header_ptr++;

	if (lcid == LONG_BSR) {
	  ce_len += 3;
	} else if (lcid == CRNTI) {
	  ce_len += 2;
	} else if ((lcid == POWER_HEADROOM)
		   || (lcid == TRUNCATED_BSR)
		   || (lcid == SHORT_BSR)) {
	  ce_len++;
	} else {
	  LOG_E(MAC, "unknown CE %d \n", lcid);
	  AssertFatal(1 == 0, "unknown CE");
	}
      }
knopp's avatar
 
knopp committed
853
    }
knopp's avatar
knopp committed
854
  }
855

knopp's avatar
knopp committed
856 857
  *num_ce = num_ces;
  *num_sdu = num_sdus;
858

knopp's avatar
knopp committed
859
  return (mac_header_ptr);
860 861
}

862 863 864 865 866
/* This function is called by PHY layer when it schedules some
 * uplink for a random access message 3.
 * The MAC scheduler has to skip the RBs used by this message 3
 * (done below in schedule_ulsch).
 */
867
void
868
set_msg3_subframe(module_id_t mod_id,
869 870 871 872
		  int CC_id,
		  int frame,
		  int subframe, int rnti, int Msg3_frame,
		  int Msg3_subframe)
873
{
874
  eNB_MAC_INST *mac = RC.mac[mod_id];
knopp's avatar
knopp committed
875 876 877 878 879 880 881
  int i;
  for (i = 0; i < NB_RA_PROC_MAX; i++) {
    if (mac->common_channels[CC_id].ra[i].state != IDLE &&
	mac->common_channels[CC_id].ra[i].rnti == rnti) {
      mac->common_channels[CC_id].ra[i].Msg3_subframe =
	Msg3_subframe;
      break;
882
    }
knopp's avatar
knopp committed
883
  }
884
}
885

886 887 888
void
schedule_ulsch(module_id_t module_idP, frame_t frameP,
	       sub_frame_t subframeP)
Cedric Roux's avatar
Cedric Roux committed
889
{
knopp's avatar
knopp committed
890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
  uint16_t first_rb[MAX_NUM_CCs], i;
  int CC_id;
  eNB_MAC_INST *mac = RC.mac[module_idP];
  COMMON_channels_t *cc;

  start_meas(&mac->schedule_ulsch);

  int sched_subframe = (subframeP + 4) % 10;

  cc = &mac->common_channels[0];
  int tdd_sfa;
  // for TDD: check subframes where we have to act and return if nothing should be done now
  if (cc->tdd_Config) {
    tdd_sfa = cc->tdd_Config->subframeAssignment;
    switch (subframeP) {
    case 0:
      if ((tdd_sfa == 0) || (tdd_sfa == 3) || (tdd_sfa == 6))
	sched_subframe = 4;
      else
	return;
      break;
    case 1:
      if ((tdd_sfa == 0) || (tdd_sfa == 1))
	sched_subframe = 7;
      else if (tdd_sfa == 6)
	sched_subframe = 8;
      break;
    default:
      return;

    case 2:		// Don't schedule UL in subframe 2 for TDD
      return;
    case 3:
      if (tdd_sfa == 2)
	sched_subframe = 7;
      else
	return;
      break;
    case 4:
      if (tdd_sfa == 1)
	sched_subframe = 8;
      else
	return;
      break;
    case 5:
      if (tdd_sfa == 0)
	sched_subframe = 9;
      else if (tdd_sfa == 6)
	sched_subframe = 3;
      else
	return;
      break;
    case 6:
      if (tdd_sfa == 1)
	sched_subframe = 2;
      else if (tdd_sfa == 6)
	sched_subframe = 3;
      else
	return;
      break;
    case 7:
      return;
    case 8:
      if ((tdd_sfa >= 2) || (tdd_sfa <= 5))
	sched_subframe = 2;
      else
	return;
      break;
    case 9:
      if ((tdd_sfa == 1) || (tdd_sfa == 3) || (tdd_sfa == 4))
	sched_subframe = 3;
      else if (tdd_sfa == 6)
	sched_subframe = 4;
      else
	return;
      break;
966
    }
knopp's avatar
knopp committed
967 968
  }
  for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
gauthier's avatar
 
gauthier committed
969

970 971


knopp's avatar
knopp committed
972 973
    //leave out first RB for PUCCH
    first_rb[CC_id] = 1;
gauthier's avatar
 
gauthier committed
974

knopp's avatar
knopp committed
975 976 977 978
    // UE data info;
    // check which UE has data to transmit
    // function to decide the scheduling
    // e.g. scheduling_rslt = Greedy(granted_UEs, nb_RB)
gauthier's avatar
 
gauthier committed
979

knopp's avatar
knopp committed
980 981
    // default function for default scheduling
    //
gauthier's avatar
 
gauthier committed
982

knopp's avatar
knopp committed
983 984 985 986
    // output of scheduling, the UE numbers in RBs, where it is in the code???
    // check if RA (Msg3) is active in this subframeP, if so skip the PRBs used for Msg3
    // Msg3 is using 1 PRB so we need to increase first_rb accordingly
    // not sure about the break (can there be more than 1 active RA procedure?)
gauthier's avatar
 
gauthier committed
987

knopp's avatar
knopp committed
988 989 990 991 992 993 994
    for (i = 0; i < NB_RA_PROC_MAX; i++) {
      if ((cc->ra[i].state == WAITMSG3) &&
	  (cc->ra[i].Msg3_subframe == sched_subframe)) {
	first_rb[CC_id]++;
	//    cc->ray[i].Msg3_subframe = -1;
	break;
      }
knopp's avatar
 
knopp committed
995
    }
knopp's avatar
knopp committed
996
  }
997

998
  // perform slice-specifc operations
999

1000 1001
  total_slice_percentage_uplink=0;
  avg_slice_percentage_uplink=1.0/n_active_slices_uplink;
1002 1003

  // reset the slice percentage for inactive slices
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
  for (i = n_active_slices_uplink; i< MAX_NUM_SLICES; i++) {
    slice_percentage_uplink[i]=0;
  }
  for (i = 0; i < n_active_slices_uplink; i++) {
    if (slice_percentage_uplink[i] < 0 ){
      LOG_W(MAC, "[eNB %d] frame %d subframe %d:invalid slice %d percentage %f. resetting to zero",
            module_idP, frameP, subframeP, i, slice_percentage_uplink[i]);
      slice_percentage_uplink[i]=0;
    }
    total_slice_percentage_uplink+=slice_percentage_uplink[i];
  }

  for (i = 0; i < n_active_slices_uplink; i++) {

    // Load any updated functions
    if (update_ul_scheduler[i] > 0 ) {
      slice_sched_ul[i] = dlsym(NULL, ul_scheduler_type[i]);
      update_ul_scheduler[i] = 0;
      update_ul_scheduler_current[i] = 0;
      //slice_percentage_current_uplink[i]= slice_percentage_uplink[i];
      //total_slice_percentage_current_uplink+=slice_percentage_uplink[i];
      //if (total_slice_percentage_current_uplink> 1)
      //total_slice_percentage_current_uplink=1;
      LOG_N(MAC,"update ul scheduler slice %d\n", i);
    }
    // the new total RB share is within the range
    if (total_slice_percentage_uplink <= 1.0){

      // check if the number of slices has changed, and log
      if (n_active_slices_current_uplink != n_active_slices_uplink ){
        if ((n_active_slices_uplink > 0) && (n_active_slices_uplink <= MAX_NUM_SLICES)) {
          LOG_N(MAC,"[eNB %d]frame %d subframe %d: number of active UL slices has changed: %d-->%d\n",
                module_idP, frameP, subframeP, n_active_slices_current_uplink, n_active_slices_uplink);
          n_active_slices_current_uplink = n_active_slices_uplink;
        } else {
          LOG_W(MAC,"invalid number of UL slices %d, revert to the previous value %d\n",
                n_active_slices_uplink, n_active_slices_current_uplink);
          n_active_slices_uplink = n_active_slices_current_uplink;
        }
      }

      // check if the slice rb share has changed, and log the console
      if (slice_percentage_current_uplink[i] != slice_percentage_uplink[i]){
        LOG_N(MAC,"[eNB %d][SLICE %d][UL] frame %d subframe %d: total percentage %f-->%f, slice RB percentage has changed: %f-->%f\n",
              module_idP, i, frameP, subframeP, total_slice_percentage_current_uplink,
              total_slice_percentage_uplink, slice_percentage_current_uplink[i], slice_percentage_uplink[i]);
        total_slice_percentage_current_uplink = total_slice_percentage_uplink;
        slice_percentage_current_uplink[i] = slice_percentage_uplink[i];
      }

      // check if the slice max MCS, and log the console
      if (slice_maxmcs_current_uplink[i] != slice_maxmcs_uplink[i]){
        if ((slice_maxmcs_uplink[i] >= 0) && (slice_maxmcs_uplink[i] <= 16)){
          LOG_N(MAC,"[eNB %d][SLICE %d][UL] frame %d subframe %d: slice MAX MCS has changed: %d-->%d\n",
                module_idP, i, frameP, subframeP, slice_maxmcs_current_uplink[i], slice_maxmcs_uplink[i]);
          slice_maxmcs_current_uplink[i] = slice_maxmcs_uplink[i];
        } else {
          LOG_W(MAC,"[eNB %d][SLICE %d][UL] invalid slice max mcs %d, revert the previous value %d\n",
                module_idP, i, slice_maxmcs_uplink[i],slice_maxmcs_current_uplink[i]);
          slice_maxmcs_uplink[i] = slice_maxmcs_current_uplink[i];
        }
      }

      // check if a new scheduler, and log the console
      if (update_ul_scheduler_current[i] != update_ul_scheduler[i]){
        LOG_N(MAC,"[eNB %d][SLICE %d][UL] frame %d subframe %d: UL scheduler for this slice is updated: %s \n",
              module_idP, i, frameP, subframeP, ul_scheduler_type[i]);
        update_ul_scheduler_current[i] = update_ul_scheduler[i];
      }
    } else {
      if (n_active_slices_uplink == n_active_slices_current_uplink) {
        LOG_W(MAC,"[eNB %d][SLICE %d][UL] invalid total RB share (%f->%f), reduce proportionally the RB share by 0.1\n",
              module_idP, i, total_slice_percentage_current_uplink, total_slice_percentage_uplink);
        if (slice_percentage_uplink[i] > avg_slice_percentage_uplink) {
          slice_percentage_uplink[i] -= 0.1;
          total_slice_percentage_uplink -= 0.1;
        }
      } else {
        // here we can correct the values, e.g. reduce proportionally
        LOG_W(MAC,"[eNB %d][SLICE %d][UL] invalid total RB share (%f->%f), revert the  number of slice to its previous value (%d->%d)\n",
              module_idP, i, total_slice_percentage_current_uplink,
              total_slice_percentage_uplink, n_active_slices_uplink,
              n_active_slices_current_uplink);
        n_active_slices_uplink = n_active_slices_current_uplink;
        slice_percentage_uplink[i] = slice_percentage_current_uplink[i];
      }
    }
1091

1092 1093 1094
    // Run each enabled slice-specific schedulers one by one
    slice_sched_ul[i](module_idP, i, frameP, subframeP, sched_subframe, first_rb);
  }
gauthier's avatar
 
gauthier committed
1095

knopp's avatar
knopp committed
1096
  stop_meas(&mac->schedule_ulsch);
1097 1098
}

1099 1100
void
schedule_ulsch_rnti(module_id_t module_idP,
1101
					slice_id_t slice_id,
1102 1103 1104
		    frame_t frameP,
		    sub_frame_t subframeP,
		    unsigned char sched_subframeP, uint16_t * first_rb)
1105
{
knopp's avatar
knopp committed
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
  int UE_id;
  uint8_t aggregation = 2;
  rnti_t rnti = -1;
  uint8_t round = 0;
  uint8_t harq_pid = 0;
  uint8_t status = 0;
  uint8_t rb_table_index = -1;
  uint32_t cqi_req, cshift, ndi, tpc;
  int32_t normalized_rx_power;
  int32_t target_rx_power = -90;
  static int32_t tpc_accumulated = 0;
  int n;
  int CC_id = 0;
  int drop_ue = 0;
  int N_RB_UL;
  eNB_MAC_INST *mac = RC.mac[module_idP];
  COMMON_channels_t *cc = mac->common_channels;
  UE_list_t *UE_list = &mac->UE_list;
  UE_TEMPLATE *UE_template;
  UE_sched_ctrl *UE_sched_ctrl;
  int sched_frame = frameP;
  int rvidx_tab[4] = { 0, 2, 3, 1 };

  if (sched_subframeP < subframeP)
1130
      sched_frame++;
knopp's avatar
knopp committed
1131 1132 1133 1134 1135 1136 1137 1138 1139

  nfapi_hi_dci0_request_t        *hi_dci0_req = &mac->HI_DCI0_req[CC_id];
  nfapi_hi_dci0_request_body_t   *hi_dci0_req_body = &hi_dci0_req->hi_dci0_request_body;
  nfapi_hi_dci0_request_pdu_t    *hi_dci0_pdu;

  nfapi_ul_config_request_t *ul_req_tmp            = &mac->UL_req_tmp[CC_id][sched_subframeP];
  nfapi_ul_config_request_body_t *ul_req_tmp_body  = &ul_req_tmp->ul_config_request_body;

  //LOG_D(MAC, "entering ulsch preprocesor\n");
1140
  ulsch_scheduler_pre_processor(module_idP, slice_id, frameP, subframeP, first_rb);
knopp's avatar
knopp committed
1141 1142 1143 1144 1145 1146 1147 1148 1149

  //LOG_D(MAC, "exiting ulsch preprocesor\n");

  hi_dci0_req->sfn_sf = (frameP << 4) + subframeP;

  // loop over all active UEs
  for (UE_id = UE_list->head_ul; UE_id >= 0;
       UE_id = UE_list->next_ul[UE_id]) {

1150
    if (!ue_slice_membership(UE_id, slice_id))
1151 1152
        continue;

knopp's avatar
knopp committed
1153 1154
    // don't schedule if Msg4 is not received yet
    if (UE_list->UE_template[UE_PCCID(module_idP, UE_id)][UE_id].
1155 1156 1157 1158 1159
        configured == FALSE) {
        LOG_D(MAC,
              "[eNB %d] frame %d subfarme %d, UE %d: not configured, skipping UE scheduling \n",
              module_idP, frameP, subframeP, UE_id);
        continue;
knopp's avatar
knopp committed
1160
    }
1161

knopp's avatar
knopp committed
1162
    rnti = UE_RNTI(module_idP, UE_id);
1163

knopp's avatar
knopp committed
1164 1165 1166 1167 1168
    if (rnti == NOT_A_RNTI) {
      LOG_W(MAC, "[eNB %d] frame %d subfarme %d, UE %d: no RNTI \n",
	    module_idP, frameP, subframeP, UE_id);
      continue;
    }
1169

knopp's avatar
knopp committed
1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
    drop_ue = 0;
    /* let's drop the UE if get_eNB_UE_stats returns NULL when calling it with any of the UE's active UL CCs */
    /* TODO: refine?

       for (n=0; n<UE_list->numactiveULCCs[UE_id]; n++) {
       CC_id = UE_list->ordered_ULCCids[n][UE_id];

       if (mac_xface->get_eNB_UE_stats(module_idP,CC_id,rnti) == NULL) {
       LOG_W(MAC,"[eNB %d] frame %d subframe %d, UE %d/%x CC %d: no PHY context\n", module_idP,frameP,subframeP,UE_id,rnti,CC_id);
       drop_ue = 1;
       break;
       }
       } */
    if (drop_ue == 1) {
      /* we can't come here, ulsch_scheduler_pre_processor won't put in the list a UE with no PHY context */
      abort();
      /* TODO: this is a hack. Sometimes the UE has no PHY context but
       * is still present in the MAC with 'ul_failure_timer' = 0 and
       * 'ul_out_of_sync' = 0. It seems wrong and the UE stays there forever. Let's
       * start an UL out of sync procedure in this case.
       * The root cause of this problem has to be found and corrected.
       * In the meantime, this hack...
       */
      if (UE_list->UE_sched_ctrl[