eNB_scheduler_dlsch.c 76.9 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
Cédric Roux's avatar
Cédric 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_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
#include "SIMULATION/TOOLS/defs.h"	// for taus
55

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

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

62
#define ENABLE_MAC_PAYLOAD_DEBUG
knopp's avatar
   
knopp committed
63
//#define DEBUG_eNB_SCHEDULER 1
64

65
extern RAN_CONTEXT_t RC;
66
extern uint8_t nfapi_mode;
67

68
69
//------------------------------------------------------------------------------
void
70
71
72
add_ue_dlsch_info(module_id_t module_idP,
		  int CC_id,
		  int UE_id, sub_frame_t subframeP, UE_DLSCH_STATUS status)
73
//------------------------------------------------------------------------------
74
{
75
  //LOG_D(MAC, "%s(module_idP:%d, CC_id:%d, UE_id:%d, subframeP:%d, status:%d) serving_num:%d rnti:%x\n", __FUNCTION__, module_idP, CC_id, UE_id, subframeP, status, eNB_dlsch_info[module_idP][CC_id][UE_id].serving_num, UE_RNTI(module_idP,UE_id));
76

77
78
79
80
81
    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;
82

83
    eNB_dlsch_info[module_idP][CC_id][UE_id].serving_num++;
84
85
86

}

87
88
//------------------------------------------------------------------------------
int
89
90
schedule_next_dlue(module_id_t module_idP, int CC_id,
		   sub_frame_t subframeP)
91
//------------------------------------------------------------------------------
92
{
93

94
95
    int next_ue;
    UE_list_t *UE_list = &RC.mac[module_idP]->UE_list;
96

97
98
99
100
101
102
    for (next_ue = UE_list->head; next_ue >= 0;
	 next_ue = UE_list->next[next_ue]) {
	if (eNB_dlsch_info[module_idP][CC_id][next_ue].status ==
	    S_DL_WAITING) {
	    return next_ue;
	}
103
    }
104

105
106
107
108
109
110
111
    for (next_ue = UE_list->head; next_ue >= 0;
	 next_ue = UE_list->next[next_ue]) {
	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;
	}
112
    }
knopp's avatar
   
knopp committed
113

114
    return (-1);		//next_ue;
115
116
117

}

118
119
//------------------------------------------------------------------------------
unsigned char
120
121
122
123
124
125
126
127
128
generate_dlsch_header(unsigned char *mac_header,
		      unsigned char num_sdus,
		      unsigned short *sdu_lengths,
		      unsigned char *sdu_lcids,
		      unsigned char drx_cmd,
		      unsigned short timing_advance_cmd,
		      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
142
143
144
145
146
    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)) {
	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = SHORT_PADDING;
	first_element = 1;
	last_size = 1;
knopp's avatar
   
knopp committed
147
    }
148

149
150
151
152
153
154
155
156
    if (short_padding == 2) {
	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;
    }
157

158
159
160
161
162
163
164
165
166
167
168
169
    if (drx_cmd != 255) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = DRX_CMD;
	last_size = 1;
knopp's avatar
   
knopp committed
170
    }
171

172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
    if (timing_advance_cmd != 31) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}

	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;
	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;
	LOG_D(MAC, "timing advance =%d (%d)\n", timing_advance_cmd,
	      ((TIMING_ADVANCE_CMD *) ce_ptr)->TA);
	ce_ptr += sizeof(TIMING_ADVANCE_CMD);
	//msg("offset %d\n",ce_ptr-mac_header_control_elements);
knopp's avatar
   
knopp committed
193
    }
194

195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
    if (ue_cont_res_id) {
	if (first_element > 0) {
	    mac_header_ptr->E = 1;
	    /*
	       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);
	     */
	    mac_header_ptr++;
	} else {
	    first_element = 1;
	}

	mac_header_ptr->R = 0;
	mac_header_ptr->E = 0;
	mac_header_ptr->LCID = UE_CONT_RES;
	last_size = 1;

	LOG_T(MAC,
	      "[eNB ][RAPROC] Generate contention resolution msg: %x.%x.%x.%x.%x.%x\n",
	      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]);

	memcpy(ce_ptr, ue_cont_res_id, 6);
	ce_ptr += 6;
	// msg("(cont_res) : offset %d\n",ce_ptr-mac_header_control_elements);
knopp's avatar
   
knopp committed
222
    }
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
    //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);

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

	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,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->R,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->E,
	       ((SCH_SUBHEADER_FIXED *)mac_header_ptr)->LCID);
	     */
	    mac_header_ptr += last_size;
	    //msg("last_size %d,mac_header_ptr %p\n",last_size,mac_header_ptr);
	} else {
	    first_element = 1;
	}
241

242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
	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;
	} else {
	    ((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;
261
#ifdef DEBUG_HEADER_PARSING
262
263
264
265
266
	    LOG_D(MAC,
		  "[eNB] generate long sdu, size %x (MSB %x, LSB %x)\n",
		  sdu_lengths[i],
		  ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_MSB,
		  ((SCH_SUBHEADER_LONG *) mac_header_ptr)->L_LSB);
267
#endif
268
	}
knopp's avatar
   
knopp committed
269
    }
270

271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
    /*

       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));
       }
     */
    if (post_padding > 0) {	// we have lots of padding at the end of the packet
	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++;
    } else {			// no end of packet padding
	// last SDU subhead is of fixed type (sdu length implicitly to be computed at UE)
	mac_header_ptr++;
    }
300

301
    //msg("After subheaders %d\n",(uint8_t*)mac_header_ptr - mac_header);
302

303
304
305
306
307
308
    if ((ce_ptr - mac_header_control_elements) > 0) {
	// 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);
309
    }
310
311
312
    //msg("After CEs %d\n",(uint8_t*)mac_header_ptr - mac_header);

    return ((unsigned char *) mac_header_ptr - mac_header);
313
314
315

}

316
317
//------------------------------------------------------------------------------
void
318
319
set_ul_DAI(int module_idP, int UE_idP, int CC_idP, int frameP,
	   int subframeP)
320
//------------------------------------------------------------------------------
321
322
{

323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
    eNB_MAC_INST *eNB = RC.mac[module_idP];
    UE_list_t *UE_list = &eNB->UE_list;
    unsigned char DAI;
    COMMON_channels_t *cc = &eNB->common_channels[CC_idP];
    if (cc->tdd_Config != NULL) {	//TDD
	DAI = (UE_list->UE_template[CC_idP][UE_idP].DAI - 1) & 3;
	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);
	// Save DAI for Format 0 DCI

	switch (cc->tdd_Config->subframeAssignment) {
	case 0:
	    //      if ((subframeP==0)||(subframeP==1)||(subframeP==5)||(subframeP==6))
	    break;

	case 1:
	    switch (subframeP) {
341
	    case 0:
342
343
344
345
346
347
348
349
	    case 1:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[7] = DAI;
		break;

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

350
	    case 5:
351
352
353
354
355
356
357
358
	    case 6:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
		break;

	    case 9:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
		break;
	    }
359

360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
	case 2:
	    //      if ((subframeP==3)||(subframeP==8))
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;

	case 3:

	    //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;
	    //}
	    switch (subframeP) {
	    case 5:
	    case 6:
	    case 1:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[2] = DAI;
		break;

	    case 7:
	    case 8:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[3] = DAI;
		break;

	    case 9:
	    case 0:
		UE_list->UE_template[CC_idP][UE_idP].DAI_ul[4] = DAI;
		break;

	    default:
		break;
	    }
391

392
	    break;
393

394
395
396
397
	case 4:
	    //      if ((subframeP==8)||(subframeP==9))
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
398

399
400
401
402
	case 5:
	    //      if (subframeP==8)
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
403

404
405
406
407
	case 6:
	    //      if ((subframeP==1)||(subframeP==4)||(subframeP==6)||(subframeP==9))
	    //  UE_list->UE_template[CC_idP][UE_idP].DAI_ul = DAI;
	    break;
408

409
410
411
	default:
	    break;
	}
knopp's avatar
   
knopp committed
412
413
414
    }
}

415

416
417
418
419
#ifdef UE_EXPANSION
extern volatile int16_t phy_tx_txdataF_end;
extern int  oai_exit;
#endif
420
421
// changes to pre-processor for eMTC

422
423
//------------------------------------------------------------------------------
void
424
425
schedule_ue_spec(module_id_t module_idP,
		 frame_t frameP, sub_frame_t subframeP, int *mbsfn_flag)
426
//------------------------------------------------------------------------------
427
{
knopp's avatar
   
knopp committed
428

429

430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
    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];
    nfapi_dl_config_request_body_t *dl_req;
    nfapi_dl_config_request_pdu_t *dl_config_pdu;
    int tdd_sfa;
    int ta_update;
nikaeinn's avatar
nikaeinn committed
466

467
#if 0
468
469
470
    if (UE_list->head == -1) {
	return;
    }
471
#endif
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
    start_meas(&eNB->schedule_dlsch);
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME
	(VCD_SIGNAL_DUMPER_FUNCTIONS_SCHEDULE_DLSCH, VCD_FUNCTION_IN);


    // 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:
jftt_wangshanshan's avatar
jftt_wangshanshan committed
504
	    if ((tdd_sfa != 3)&& (tdd_sfa != 4) && (tdd_sfa != 5))
505
506
507
508
509
510
511
512
		return;
	    break;
	case 8:
	    if ((tdd_sfa != 2) && (tdd_sfa != 3) && (tdd_sfa != 4)
		&& (tdd_sfa != 5))
		return;
	    break;
	case 9:
jftt_wangshanshan's avatar
jftt_wangshanshan committed
513
	    if (tdd_sfa == 0)
514
515
		return;
	    break;
516

Xu Bo's avatar
Xu Bo committed
517
	  }
518
    }
Cédric Roux's avatar
Cédric Roux committed
519

520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
    //weight = get_ue_weight(module_idP,UE_id);
    aggregation = 2;
    for (CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
	N_RB_DL[CC_id] = to_prb(cc[CC_id].mib->message.dl_Bandwidth);
	min_rb_unit[CC_id] = get_min_rb_unit(module_idP, CC_id);
	// get number of PRBs less those used by common channels
	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)
		total_nb_available_rb[CC_id]--;

	N_RBG[CC_id] = to_rbg(cc[CC_id].mib->message.dl_Bandwidth);

	// store the global enb stats:
	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];
	eNB->eNB_stats[CC_id].total_available_prbs +=
	    total_nb_available_rb[CC_id];
	eNB->eNB_stats[CC_id].dlsch_bytes_tx = 0;
	eNB->eNB_stats[CC_id].dlsch_pdus_tx = 0;
541
    }
542

543
  /// CALLING Pre_Processor for downlink scheduling (Returns estimation of RBs required by each UE and the allocation on sub-band)
544

gauthier's avatar
gauthier committed
545
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR,VCD_FUNCTION_IN);
knopp's avatar
   
knopp committed
546
  start_meas(&eNB->schedule_dlsch_preprocessor);
547
  dlsch_scheduler_pre_processor(module_idP,
548
549
550
                                frameP,
                                subframeP,
                                N_RBG,
Xu Bo's avatar
Xu Bo committed
551
                                mbsfn_flag);
knopp's avatar
   
knopp committed
552
  stop_meas(&eNB->schedule_dlsch_preprocessor);
gauthier's avatar
gauthier committed
553
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PREPROCESSOR,VCD_FUNCTION_OUT);
knopp's avatar
   
knopp committed
554

555
556
557
558
559
560

#ifdef UE_EXPANSION
  struct timespec time_req, time_rem;
  time_req.tv_sec = 0;
  time_req.tv_nsec = 10000;
#endif
561
  for (CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
562
    LOG_D(MAC, "doing schedule_ue_spec for CC_id %d\n",CC_id);
563

564
565
    dl_req        = &eNB->DL_req[CC_id].dl_config_request_body;

knopp's avatar
   
knopp committed
566
567
    if (mbsfn_flag[CC_id]>0)
      continue;
568

Xu Bo's avatar
Xu Bo committed
569
570
#ifdef UE_EXPANSION
    for (i = 0; i < dlsch_ue_select[CC_id].ue_num; i++) {
Xu Bo's avatar
Xu Bo committed
571
572
573
574
575
576
      if(dlsch_ue_select[CC_id].list[i].ue_priority == SCH_DL_MSG2){
        continue;
      }
      if(dlsch_ue_select[CC_id].list[i].ue_priority == SCH_DL_MSG4){
        continue;
      }
Xu Bo's avatar
Xu Bo committed
577
      UE_id = dlsch_ue_select[CC_id].list[i].UE_id;
Xu Bo's avatar
Xu Bo committed
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
      rnti = UE_RNTI(module_idP,UE_id);
      if (rnti==NOT_A_RNTI) {
        LOG_E(MAC,"Cannot find rnti for UE_id %d (num_UEs %d)\n",UE_id,UE_list->num_UEs);
        continue;
      }

      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];

      switch(get_tmode(module_idP,CC_id,UE_id)){
      case 1:
      case 2:
      case 7:
        aggregation = get_aggregation(get_bw_index(module_idP,CC_id),
                                      ue_sched_ctl->dl_cqi[CC_id],
                                      format1);
        break;
      case 3:
        aggregation = get_aggregation(get_bw_index(module_idP,CC_id),
                                      ue_sched_ctl->dl_cqi[CC_id],
                                      format2A);
        break;
      default:
        LOG_W(MAC,"Unsupported transmission mode %d\n", get_tmode(module_idP,CC_id,UE_id));
        aggregation = 2;
        break;
      }
Xu Bo's avatar
Xu Bo committed
605

Xu Bo's avatar
Xu Bo committed
606
607
608
609
610
611
612
613
614
      if (cc[CC_id].tdd_Config != NULL) { //TDD
        set_ue_dai (subframeP,
                    UE_id,
                    CC_id,
  		    cc[CC_id].tdd_Config->subframeAssignment,
                    UE_list);
        // update UL DAI after DLSCH scheduling
        set_ul_DAI(module_idP,UE_id,CC_id,frameP,subframeP);
      }
Xu Bo's avatar
Xu Bo committed
615
#else
616
    for (UE_id=UE_list->head; UE_id>=0; UE_id=UE_list->next[UE_id]) {
Xu Bo's avatar
Xu Bo committed
617

618
      continue_flag=0; // reset the flag to allow allocation for the remaining UEs
knopp's avatar
   
knopp committed
619
      rnti = UE_RNTI(module_idP,UE_id);
620
      eNB_UE_stats = &UE_list->eNB_UE_stats[CC_id][UE_id];
621
      ue_sched_ctl = &UE_list->UE_sched_ctrl[UE_id];
622

623

624
      if (rnti==NOT_A_RNTI) {
625
626
        LOG_D(MAC,"Cannot find rnti for UE_id %d (num_UEs %d)\n",UE_id,UE_list->num_UEs);
        continue_flag=1;
627
      }
628

629
      if (eNB_UE_stats==NULL) {
630
631
        LOG_D(MAC,"[eNB] Cannot find eNB_UE_stats\n");
        continue_flag=1;
632
      }
633
634

      if (continue_flag != 1){
635
        switch(get_tmode(module_idP,CC_id,UE_id)){
636
637
638
        case 1:
        case 2:
        case 7:
Xu Bo's avatar
Xu Bo committed
639
			  aggregation = get_aggregation(get_bw_index(module_idP,CC_id), 
Cédric Roux's avatar
Cédric Roux committed
640
					ue_sched_ctl->dl_cqi[CC_id],
641
					format1);
642
643
644
645
		    break;
		case 3:
		    aggregation =
			get_aggregation(get_bw_index(module_idP, CC_id),
Cédric Roux's avatar
Cédric Roux committed
646
					ue_sched_ctl->dl_cqi[CC_id],
647
					format2A);
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
		    break;
		default:
		    LOG_W(MAC, "Unsupported transmission mode %d\n",
			  get_tmode(module_idP, CC_id, UE_id));
		    aggregation = 2;
		}
	    }
	    /* if (continue_flag != 1 */
	    if ((ue_sched_ctl->pre_nb_available_rbs[CC_id] == 0) ||	// no RBs allocated 
		CCE_allocation_infeasible(module_idP, CC_id, 1, subframeP,
					  aggregation, rnti)) {
		LOG_D(MAC,
		      "[eNB %d] Frame %d : no RB allocated for UE %d on CC_id %d: continue \n",
		      module_idP, frameP, UE_id, CC_id);
		continue_flag = 1;	//to next user (there might be rbs availiable for other UEs in TM5
	    }
knopp's avatar
   
knopp committed
664

665
666
667
668
669
670
671
672
673
	    if (cc[CC_id].tdd_Config != NULL) {	//TDD
		set_ue_dai(subframeP,
			   UE_id,
			   CC_id,
			   cc[CC_id].tdd_Config->subframeAssignment,
			   UE_list);
		// update UL DAI after DLSCH scheduling
		set_ul_DAI(module_idP, UE_id, CC_id, frameP, subframeP);
	    }
674

675
676
677
678
679
	    if (continue_flag == 1) {
		add_ue_dlsch_info(module_idP,
				  CC_id, UE_id, subframeP, S_DL_NONE);
		continue;
	    }
Xu Bo's avatar
Xu Bo committed
680
#endif
681
682
#warning RK->CR This old API call has to be revisited for FAPI, or logic must be changed
#if 0
683
684
685
686
687
	    /* 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);
688
#endif
Cédric Roux's avatar
Cédric Roux committed
689

690
	    nb_available_rb = ue_sched_ctl->pre_nb_available_rbs[CC_id];
691

jftt_wangshanshan's avatar
jftt_wangshanshan committed
692
	    harq_pid = frame_subframe2_dl_harq_pid(cc->tdd_Config,frameP ,subframeP);
693

694
	    round = ue_sched_ctl->round[CC_id][harq_pid];
695

696
697
698
699
700
	    UE_list->eNB_UE_stats[CC_id][UE_id].crnti = rnti;
	    UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status =
		mac_eNB_get_rrc_status(module_idP, rnti);
	    UE_list->eNB_UE_stats[CC_id][UE_id].harq_pid = harq_pid;
	    UE_list->eNB_UE_stats[CC_id][UE_id].harq_round = round;
701
702


703
704
705
	    if (UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status <
		RRC_CONNECTED)
		continue;
706

707
708
	    sdu_length_total = 0;
	    num_sdus = 0;
709

710
711
712
713
	    /*
	       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);
	     */
714
715
716
717
718
719
            if (nfapi_mode) {
              eNB_UE_stats->dlsch_mcs1 = 10;//cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
            }
            else {
              eNB_UE_stats->dlsch_mcs1 = cqi_to_mcs[ue_sched_ctl->dl_cqi[CC_id]];
            }
720
	    eNB_UE_stats->dlsch_mcs1 = eNB_UE_stats->dlsch_mcs1;	//cmin(eNB_UE_stats->dlsch_mcs1, openair_daq_vars.target_ue_dl_mcs);
721
722


723
724
	    // store stats
	    //UE_list->eNB_UE_stats[CC_id][UE_id].dl_cqi= eNB_UE_stats->dl_cqi;
725

726
727
728
729
730
	    // initializing the rb allocation indicator for each UE
	    for (j = 0; j < N_RBG[CC_id]; j++) {
		UE_list->
		    UE_template[CC_id][UE_id].rballoc_subband[harq_pid][j]
		    = 0;
731
	    }
Cédric Roux's avatar
Cédric Roux committed
732

733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
	    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",
		  module_idP, frameP, UE_id, CC_id, rnti, harq_pid, round,
		  nb_available_rb, ue_sched_ctl->dl_cqi[CC_id],
		  eNB_UE_stats->dlsch_mcs1,
		  UE_list->eNB_UE_stats[CC_id][UE_id].rrc_status);



	    /* process retransmission  */

	    if (round != 8) {

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

		if (nb_rb <= nb_available_rb) {
		    if (cc[CC_id].tdd_Config != NULL) {
			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].
jftt_wangshanshan's avatar
jftt_wangshanshan committed
758
				      DAI,subframeP);
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
			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);
		    }

		    if (nb_rb == ue_sched_ctl->pre_nb_available_rbs[CC_id]) {
			for (j = 0; j < N_RBG[CC_id]; j++) {	// for indicating the rballoc for each sub-band
			    UE_list->UE_template[CC_id][UE_id].
				rballoc_subband[harq_pid][j] =
				ue_sched_ctl->rballoc_sub_UE[CC_id][j];
			}
		    } else {
			nb_rb_temp = nb_rb;
			j = 0;

			while ((nb_rb_temp > 0) && (j < N_RBG[CC_id])) {
			    if (ue_sched_ctl->rballoc_sub_UE[CC_id][j] ==
				1) {
				if (UE_list->
				    UE_template[CC_id]
				    [UE_id].rballoc_subband[harq_pid][j])
				    printf
					("WARN: rballoc_subband not free for retrans?\n");
				UE_list->
				    UE_template[CC_id]
				    [UE_id].rballoc_subband[harq_pid][j] =
				    ue_sched_ctl->rballoc_sub_UE[CC_id][j];

				if ((j == N_RBG[CC_id] - 1) &&
				    ((N_RB_DL[CC_id] == 25) ||
				     (N_RB_DL[CC_id] == 50))) {
				    nb_rb_temp =
					nb_rb_temp - min_rb_unit[CC_id] +
					1;
				} else {
				    nb_rb_temp =
					nb_rb_temp - min_rb_unit[CC_id];
				}
			    }

			    j = j + 1;
			}
		    }

		    nb_available_rb -= nb_rb;
		    /*
		       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];

		       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];
		       }
		     */

		    switch (get_tmode(module_idP, CC_id, UE_id)) {
		    case 1:
		    case 2:
		    case 7:
		    default:
Cédric Roux's avatar
Cédric Roux committed
819
                      LOG_D(MAC,"retransmission DL_REQ: rnti:%x\n",rnti);
820

821
822
823
824
825
826
827
828
829
830
			dl_config_pdu =
			    &dl_req->dl_config_pdu_list[dl_req->
							number_pdu];
			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;
			dl_config_pdu->pdu_size =
			    (uint8_t) (2 +
				       sizeof(nfapi_dl_config_dci_dl_pdu));
831
                        dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.tl.tag = NFAPI_DL_CONFIG_REQUEST_DCI_DL_PDU_REL8_TAG;
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
			dl_config_pdu->dci_dl_pdu.dci_dl_pdu_rel8.
			    dci_format = NFAPI_DL_DCI_FORMAT_1;
			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);
			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, 1, subframeP,
			     dl_config_pdu->dci_dl_pdu.
			     dci_dl_pdu_rel8.aggregation_level, rnti)) {
			    dl_req->number_dci++;
			    dl_req->number_pdu++;
887
888
889
890
                            dl_req->tl.tag = NFAPI_DL_CONFIG_REQUEST_BODY_TAG;

                            eNB->DL_req[CC_id].sfn_sf = frameP<<4 | subframeP;
                            eNB->DL_req[CC_id].header.message_id = NFAPI_DL_CONFIG_REQUEST;
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
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982

			    fill_nfapi_dlsch_config(eNB, dl_req, TBS, -1
						    /* retransmission, no pdu_index */
						    , 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
				);

			    LOG_D(MAC,
				  "Filled NFAPI configuration for DCI/DLSCH %d, retransmission round %d\n",
				  eNB->pdu_index[CC_id], round);

			    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)
			} else {
			    LOG_W(MAC,
				  "Frame %d, Subframe %d: Dropping DLSCH allocation for UE %d\%x, infeasible CCE allocation\n",
				  frameP, subframeP, UE_id, rnti);
			}
		    }


		    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 {
		    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);
		}
	    } else {		/* This is a potentially new SDU opportunity */

		rlc_status.bytes_in_buffer = 0;
		// Now check RLC information to compute number of required RBs
		// get maximum TBS size for RLC request
		TBS =
		    get_TBS_DL(eNB_UE_stats->dlsch_mcs1, nb_available_rb);
		// check first for RLC data on DCCH
		// add the length for  all the control elements (timing adv, drx, etc) : header + payload

		if (ue_sched_ctl->ta_timer == 0) {
		    ta_update = ue_sched_ctl->ta_update;
		    /* if we send TA then set timer to not send it for a while */
		    if (ta_update != 31)
			ue_sched_ctl->ta_timer = 20;
		    /* reset ta_update */
		    ue_sched_ctl->ta_update = 31;
		} else {
		    ta_update = 31;
		}

		ta_len = (ta_update != 31) ? 2 : 0;

		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, rnti, module_idP, frameP, subframeP, 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
			LOG_D(MAC,
Xu Bo's avatar
Xu Bo committed
983
984
			      "[eNB %d] SFN/SF %d.%d, DL-DCCH->DLSCH CC_id %d, Requesting %d bytes from RLC (RRC message)\n",
			      module_idP, frameP, subframeP, CC_id,
985
986
987
988
989
			      TBS - header_len_dcch);
			sdu_lengths[0] = mac_rlc_data_req(module_idP, rnti, module_idP, frameP, ENB_FLAG_YES, MBMS_FLAG_NO, DCCH, TBS,	//not used
							  (char *)
							  &dlsch_buffer
							  [0]);
990
991
992
993
994
995
996
997
998
999
1000
            pthread_mutex_lock(&rrc_release_freelist);
            if(rrc_release_info.num_UEs > 0){
              uint16_t release_total = 0;
              for(uint16_t release_num = 0;release_num < NUMBER_OF_UE_MAX;release_num++){
                if(rrc_release_info.RRC_release_ctrl[release_num].flag == 1){
                 release_total++;
                  if( (rrc_release_info.RRC_release_ctrl[release_num].rnti == rnti) &&
                      (rrc_release_info.RRC_release_ctrl[release_num].rrc_eNB_mui == rlc_status.rrc_mui)){
                      rrc_release_info.RRC_release_ctrl[release_num].flag = 3;
                  }
                }
For faster browsing, not all history is shown. View entire blame