lte-enb.c 70.2 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
 */
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

/*! \file lte-enb.c
 * \brief Top-level threads for eNodeB
 * \author R. Knopp, F. Kaltenberger, Navid Nikaein
 * \date 2012
 * \version 0.1
 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr, navid.nikaein@eurecom.fr
 * \note
 * \warning
 */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sched.h>
#include <linux/sched.h>
#include <signal.h>
#include <execinfo.h>
#include <getopt.h>
#include <sys/sysinfo.h>
#include "rt_wrapper.h"

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

#include "assertions.h"
#include "msc.h"

#include "PHY/types.h"

#include "PHY/defs.h"
#undef MALLOC //there are two conflicting definitions, so we better make sure we don't use it at all
//#undef FRAME_LENGTH_COMPLEX_SAMPLES //there are two conflicting definitions, so we better make sure we don't use it at all

#include "../../ARCH/COMMON/common_lib.h"

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

63
#include "PHY/LTE_TRANSPORT/if4_tools.h"
64
#include "PHY/LTE_TRANSPORT/if5_tools.h"
65

66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
#include "PHY/extern.h"
#include "SCHED/extern.h"
#include "LAYER2/MAC/extern.h"

#include "../../SIMU/USER/init_lte.h"

#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/extern.h"
#include "LAYER2/MAC/proto.h"
#include "RRC/LITE/extern.h"
#include "PHY_INTERFACE/extern.h"

#ifdef SMBV
#include "PHY/TOOLS/smbv.h"
unsigned short config_frames[4] = {2,9,11,13};
#endif
#include "UTIL/LOG/log_extern.h"
#include "UTIL/OTG/otg_tx.h"
#include "UTIL/OTG/otg_externs.h"
#include "UTIL/MATH/oml.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "UTIL/OPT/opt.h"
#include "enb_config.h"
//#include "PHY/TOOLS/time_meas.h"

#ifndef OPENAIR2
#include "UTIL/OTG/otg_extern.h"
#endif

#if defined(ENABLE_ITTI)
# if defined(ENABLE_USE_MME)
#   include "s1ap_eNB.h"
#ifdef PDCP_USE_NETLINK
#   include "SIMULATION/ETH_TRANSPORT/proto.h"
#endif
# endif
#endif

Rohit Gupta's avatar
bugfix    
Rohit Gupta committed
104
105
#include "T.h"

106
107
108
109
110
111
112
113
114
115
//#define DEBUG_THREADS 1

//#define USRP_DEBUG 1
struct timing_info_t {
  //unsigned int frame, hw_slot, last_slot, next_slot;
  RTIME time_min, time_max, time_avg, time_last, time_now;
  //unsigned int mbox0, mbox1, mbox2, mbox_target;
  unsigned int n_samples;
} timing_info;

116
117
// Fix per CC openair rf/if device update
// extern openair0_device openair0;
118
119
120
121
122
123
124
125
126
127
128
129
130

#if defined(ENABLE_ITTI)
extern volatile int             start_eNB;
extern volatile int             start_UE;
#endif
extern volatile int                    oai_exit;

extern openair0_config_t openair0_cfg[MAX_CARDS];

extern pthread_cond_t sync_cond;
extern pthread_mutex_t sync_mutex;
extern int sync_var;

131
132
extern transmission_mode;

133
//pthread_t                       main_eNB_thread;
134
135
136

time_stats_t softmodem_stats_mt; // main thread
time_stats_t softmodem_stats_hw; //  hw acquisition
knopp's avatar
knopp committed
137
time_stats_t softmodem_stats_rxtx_sf; // total tx time
138
time_stats_t softmodem_stats_rx_sf; // total rx time
139
140
//int32_t **rxdata;
//int32_t **txdata;
141

142
143
uint8_t seqno; //sequence number

144
145
146
147
148
149
150
151
152
153
static int                      time_offset[4] = {0,0,0,0};

/* mutex, cond and variable to serialize phy proc TX calls
 * (this mechanism may be relaxed in the future for better
 * performances)
 */
static struct {
  pthread_mutex_t  mutex_phy_proc_tx;
  pthread_cond_t   cond_phy_proc_tx;
  volatile uint8_t phy_proc_CC_id;
154
} sync_phy_proc;
155

156
157
extern double cpuf;

158
159
void exit_fun(const char* s);

160
void init_eNB(eNB_func_t node_function[], eNB_timing_t node_timing[],int nb_inst,eth_params_t *,int,int);
161
void stop_eNB(int nb_inst);
162
163


knopp's avatar
knopp committed
164
static inline void thread_top_init(char *thread_name,
165
				   int affinity,
knopp's avatar
knopp committed
166
167
168
				   uint64_t runtime,
				   uint64_t deadline,
				   uint64_t period) {
knopp's avatar
knopp committed
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188

  MSC_START_USE();

#ifdef DEADLINE_SCHEDULER
  struct sched_attr attr;

  unsigned int flags = 0;

  attr.size = sizeof(attr);
  attr.sched_flags = 0;
  attr.sched_nice = 0;
  attr.sched_priority = 0;

  attr.sched_policy   = SCHED_DEADLINE;
  attr.sched_runtime  = runtime;
  attr.sched_deadline = deadline;
  attr.sched_period   = period; 

  if (sched_setattr(0, &attr, flags) < 0 ) {
    perror("[SCHED] eNB tx thread: sched_setattr failed\n");
laurent's avatar
small2    
laurent committed
189
    exit(1);
knopp's avatar
knopp committed
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
  }

#else //LOW_LATENCY
  int policy, s, j;
  struct sched_param sparam;
  char cpu_affinity[1024];
  cpu_set_t cpuset;

  /* Set affinity mask to include CPUs 1 to MAX_CPUS */
  /* CPU 0 is reserved for UHD threads */
  /* CPU 1 is reserved for all RX_TX threads */
  /* Enable CPU Affinity only if number of CPUs >2 */
  CPU_ZERO(&cpuset);

#ifdef CPU_AFFINITY
  if (get_nprocs() > 2)
  {
207
208
209
210
    if (affinity == 0)
      CPU_SET(0,&cpuset);
    else
      for (j = 1; j < get_nprocs(); j++)
knopp's avatar
knopp committed
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
        CPU_SET(j, &cpuset);
    s = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
    if (s != 0)
    {
      perror( "pthread_setaffinity_np");
      exit_fun("Error setting processor affinity");
    }
  }
#endif //CPU_AFFINITY

  /* Check the actual affinity mask assigned to the thread */
  s = pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
  if (s != 0) {
    perror( "pthread_getaffinity_np");
    exit_fun("Error getting processor affinity ");
  }
  memset(cpu_affinity,0,sizeof(cpu_affinity));
  for (j = 0; j < CPU_SETSIZE; j++)
    if (CPU_ISSET(j, &cpuset)) {  
      char temp[1024];
      sprintf (temp, " CPU_%d", j);
      strcat(cpu_affinity, temp);
    }

  memset(&sparam, 0, sizeof(sparam));
236
  sparam.sched_priority = sched_get_priority_max(SCHED_FIFO);
knopp's avatar
knopp committed
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
  policy = SCHED_FIFO ; 
  
  s = pthread_setschedparam(pthread_self(), policy, &sparam);
  if (s != 0) {
    perror("pthread_setschedparam : ");
    exit_fun("Error setting thread priority");
  }
  
  s = pthread_getschedparam(pthread_self(), &policy, &sparam);
  if (s != 0) {
    perror("pthread_getschedparam : ");
    exit_fun("Error getting thread priority");
  }

  LOG_I(HW, "[SCHED][eNB] %s started on CPU %d TID %ld, sched_policy = %s , priority = %d, CPU Affinity=%s \n",thread_name,sched_getcpu(),gettid(),
                   (policy == SCHED_FIFO)  ? "SCHED_FIFO" :
                   (policy == SCHED_RR)    ? "SCHED_RR" :
                   (policy == SCHED_OTHER) ? "SCHED_OTHER" :
                   "???",
                   sparam.sched_priority, cpu_affinity );

#endif //LOW_LATENCY

  mlockall(MCL_CURRENT | MCL_FUTURE);

}

knopp's avatar
knopp committed
264
static inline void wait_sync(char *thread_name) {
knopp's avatar
knopp committed
265
266
267
268
269
270
271
272
273
274
275
276
277

  printf( "waiting for sync (%s)\n",thread_name);
  pthread_mutex_lock( &sync_mutex );
  
  while (sync_var<0)
    pthread_cond_wait( &sync_cond, &sync_mutex );
  
  pthread_mutex_unlock(&sync_mutex);
  
  printf( "got sync (%s)\n", thread_name);

}

278

279
280
void do_OFDM_mod_rt(int subframe,PHY_VARS_eNB *phy_vars_eNB)
{
281

282
283
  unsigned int aa,slot_offset;
  //int dummy_tx_b[7680*4] __attribute__((aligned(32)));
284
  int i, tx_offset;
285
  //int slot_sizeF = (phy_vars_eNB->frame_parms.ofdm_symbol_size)* ((phy_vars_eNB->frame_parms.Ncp==1) ? 6 : 7);
286
  int len;
287
  //int slot_offset_F = (subframe<<1)*slot_sizeF;
288

289
  slot_offset = subframe*phy_vars_eNB->frame_parms.samples_per_tti;
290

291
  
292
293
  if ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_DL)||
      ((subframe_select(&phy_vars_eNB->frame_parms,subframe)==SF_S))) {
294
295
    //    LOG_D(HW,"Frame %d: Generating slot %d\n",frame,next_slot);

296
297
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_OFDM_MODULATION,1);

298
    do_OFDM_mod_symbol(&phy_vars_eNB->common_vars,
299
300
                  0,
                  subframe<<1,
301
302
                  &phy_vars_eNB->frame_parms,
		  phy_vars_eNB->do_precoding);
303
304
 
    // if S-subframe generate first slot only 
305
306
    if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_DL) {
      do_OFDM_mod_symbol(&phy_vars_eNB->common_vars,
307
308
                    0,
                    1+(subframe<<1),
309
310
                    &phy_vars_eNB->frame_parms,
                    phy_vars_eNB->do_precoding);
311
312
313
314
315
316
    }

    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_OFDM_MODULATION,0);
    

/*
317
318
319
    for (aa=0; aa<phy_vars_eNB->frame_parms.nb_antennas_tx; aa++) {
      if (phy_vars_eNB->frame_parms.Ncp == EXTENDED) {
        PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
320
                     dummy_tx_b,
321
                     phy_vars_eNB->frame_parms.ofdm_symbol_size,
322
                     6,
323
                     phy_vars_eNB->frame_parms.nb_prefix_samples,
324
                     CYCLIC_PREFIX);
325
326
327
328
329
330
331
	if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_DL) 
	  PHY_ofdm_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
		       dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
		       phy_vars_eNB->frame_parms.ofdm_symbol_size,
		       6,
		       phy_vars_eNB->frame_parms.nb_prefix_samples,
		       CYCLIC_PREFIX);
332
      } else {
333
        normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F],
334
335
                          dummy_tx_b,
                          7,
336
                          &(phy_vars_eNB->frame_parms));
337
	// if S-subframe generate first slot only
338
	if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_DL)
339
340
	  normal_prefix_mod(&phy_vars_eNB->common_vars.txdataF[0][aa][slot_offset_F+slot_sizeF],
			    dummy_tx_b+(phy_vars_eNB->frame_parms.samples_per_tti>>1),
341
			    7,
342
			    &(phy_vars_eNB->frame_parms));
343
      }
344
    } */
345

346
    for (aa=0; aa<phy_vars_eNB->frame_parms.nb_antennas_tx; aa++) {
347
      // if S-subframe generate first slot only
348
349
      if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S)
	len = phy_vars_eNB->frame_parms.samples_per_tti>>1;
350
      else
351
	len = phy_vars_eNB->frame_parms.samples_per_tti;
352
353
354
355
356
357
358
      /*
      for (i=0;i<len;i+=4) {
	dummy_tx_b[i] = 0x100;
	dummy_tx_b[i+1] = 0x01000000;
	dummy_tx_b[i+2] = 0xff00;
	dummy_tx_b[i+3] = 0xff000000;
	}*/
359
360
      for (i=0; i<len; i++) {
        tx_offset = (int)slot_offset+time_offset[aa]+i;
361

362
363
	
        if (tx_offset<0)
364
          tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
365

366
367
        if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti))
          tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
368

369
/*	((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[0] = ((short*)dummy_tx_b)[2*i]<<openair0_cfg[0].iq_txshift;
370
	
371
	((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[1] = ((short*)dummy_tx_b)[2*i+1]<<openair0_cfg[0].iq_txshift; */
372

373
	((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[0] = ((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[0]<<openair0_cfg[0].iq_txshift;
374
	
375
	((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[1] = ((short*)&phy_vars_eNB->common_vars.txdata[0][aa][tx_offset])[1]<<openair0_cfg[0].iq_txshift;
376
     }
377
     // if S-subframe switch to RX in second subframe
378
     if (subframe_select(&phy_vars_eNB->frame_parms,subframe) == SF_S) {
379
       for (i=0; i<len; i++) {
380
	 phy_vars_eNB->common_vars.txdata[0][aa][tx_offset++] = 0x00010001;
381
382
       }
     }
383

384
     if ((((phy_vars_eNB->frame_parms.tdd_config==0) ||
385
386
387
	  (phy_vars_eNB->frame_parms.tdd_config==1) ||
	  (phy_vars_eNB->frame_parms.tdd_config==2) ||
	  (phy_vars_eNB->frame_parms.tdd_config==6)) && 
388
	  (subframe==0)) || (subframe==5)) {
389
390
391
       // turn on tx switch N_TA_offset before
       //LOG_D(HW,"subframe %d, time to switch to tx (N_TA_offset %d, slot_offset %d) \n",subframe,phy_vars_eNB->N_TA_offset,slot_offset);
       for (i=0; i<phy_vars_eNB->N_TA_offset; i++) {
392
         tx_offset = (int)slot_offset+time_offset[aa]+i-phy_vars_eNB->N_TA_offset;
Sandeep Kumar's avatar
Sandeep Kumar committed
393
394
         if (tx_offset<0)
           tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
395
	 
396
397
	 if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti))
	   tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*phy_vars_eNB->frame_parms.samples_per_tti;
398
	 
399
	 phy_vars_eNB->common_vars.txdata[0][aa][tx_offset] = 0x00000000;
400
401
402
403
       }
     }
    }
  }
404
405
}

406

407
void tx_fh_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
Raymond Knopp's avatar
Raymond Knopp committed
408
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, proc->timestamp_tx&0xffffffff );
409
410
411
  send_IF5(eNB, proc->timestamp_tx, proc->subframe_tx, &seqno, IF5_RRH_GW_DL);
}

412
413
414
415
416
void tx_fh_if5_mobipass(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, proc->timestamp_tx&0xffffffff );
  send_IF5(eNB, proc->timestamp_tx, proc->subframe_tx, &seqno, IF5_MOBIPASS); 
}

417
void tx_fh_if4p5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {    
418
  send_IF4p5(eNB,proc->frame_tx,proc->subframe_tx, IF4p5_PDLFFT, 0);
419
420
}

Raymond Knopp's avatar
Raymond Knopp committed
421
422
423
424
void proc_tx_high0(PHY_VARS_eNB *eNB,
		   eNB_rxtx_proc_t *proc,
		   relaying_type_t r_type,
		   PHY_VARS_RN *rn) {
425

knopp's avatar
knopp committed
426
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;
knopp's avatar
knopp committed
427
428

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
429
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
430

431
  phy_procedures_eNB_TX(eNB,proc,r_type,rn,1);
432
433
434
435
436
437
438
439
440
441
442
443
444
445

  /* we're done, let the next one proceed */
  if (pthread_mutex_lock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error locking PHY proc mutex for eNB TX proc\n");
    exit_fun("nothing to add");
  }	
  sync_phy_proc.phy_proc_CC_id++;
  sync_phy_proc.phy_proc_CC_id %= MAX_NUM_CCs;
  pthread_cond_broadcast(&sync_phy_proc.cond_phy_proc_tx);
  if (pthread_mutex_unlock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error unlocking PHY proc mutex for eNB TX proc\n");
    exit_fun("nothing to add");
  }

Raymond Knopp's avatar
Raymond Knopp committed
446
447
448
449
450
451
}

void proc_tx_high(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
452

knopp's avatar
knopp committed
453

Raymond Knopp's avatar
Raymond Knopp committed
454
455
456
457
458
459
460
461
462
463
464
465
  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);

  // if TX fronthaul go ahead 
  if (eNB->tx_fh) eNB->tx_fh(eNB,proc);

}

void proc_tx_full(PHY_VARS_eNB *eNB,
		  eNB_rxtx_proc_t *proc,
		  relaying_type_t r_type,
		  PHY_VARS_RN *rn) {
466

Raymond Knopp's avatar
Raymond Knopp committed
467
468
469
470
471
472

  // do PHY high
  proc_tx_high0(eNB,proc,r_type,rn);
  // do OFDM modulation
  do_OFDM_mod_rt(proc->subframe_tx,eNB);
  // if TX fronthaul go ahead 
473
474
  if (eNB->tx_fh) eNB->tx_fh(eNB,proc);

475
  /*
476
477
478
479
480
481
482
483
484
485
  if (proc->frame_tx>1000) {
    write_output("/tmp/txsig0.m","txs0", &eNB->common_vars.txdata[eNB->Mod_id][0][0], eNB->frame_parms.samples_per_tti*10,1,1);
    write_output("/tmp/txsigF0.m","txsF0", &eNB->common_vars.txdataF[eNB->Mod_id][0][0],eNB->frame_parms.symbols_per_tti*eNB->frame_parms.ofdm_symbol_size*10,1,1);
    write_output("/tmp/txsig1.m","txs1", &eNB->common_vars.txdata[eNB->Mod_id][1][0], eNB->frame_parms.samples_per_tti*10,1,1);
    write_output("/tmp/txsigF1.m","txsF1", &eNB->common_vars.txdataF[eNB->Mod_id][1][0],eNB->frame_parms.symbols_per_tti*eNB->frame_parms.ofdm_symbol_size*10,1,1);
    if (transmission_mode == 7) 
      write_output("/tmp/txsigF5.m","txsF5", &eNB->common_vars.txdataF[eNB->Mod_id][5][0],eNB->frame_parms.symbols_per_tti*eNB->frame_parms.ofdm_symbol_size*10,1,1);
    exit_fun("");
  }
  */
486
487
}

Raymond Knopp's avatar
Raymond Knopp committed
488
489
490
491
void proc_tx_rru_if4p5(PHY_VARS_eNB *eNB,
		       eNB_rxtx_proc_t *proc,
		       relaying_type_t r_type,
		       PHY_VARS_RN *rn) {
492
493
494
495
496

  uint32_t symbol_number=0;
  uint32_t symbol_mask, symbol_mask_full;
  uint16_t packet_type;

knopp's avatar
knopp committed
497
498
499
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
500
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
knopp's avatar
knopp committed
501

502
503
504
505
506
  /// **** recv_IF4 of txdataF from RCC **** ///             
  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<eNB->frame_parms.symbols_per_tti)-1;
  
knopp's avatar
knopp committed
507

508
509
510
511
512
513
514
515
516
  do { 
    recv_IF4p5(eNB, &proc->frame_tx, &proc->subframe_tx, &packet_type, &symbol_number);
    symbol_mask = symbol_mask | (1<<symbol_number);
  } while (symbol_mask != symbol_mask_full); 

  do_OFDM_mod_rt(proc->subframe_tx, eNB);
}

void proc_tx_rru_if5(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc) {
knopp's avatar
knopp committed
517
518
519
  int offset = proc == &eNB->proc.proc_rxtx[0] ? 0 : 1;

  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB+offset, proc->frame_tx );
520
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB+offset, proc->subframe_tx );
521
522
  /// **** recv_IF5 of txdata from BBU **** ///       
  recv_IF5(eNB, &proc->timestamp_tx, proc->subframe_tx, IF5_RRH_GW_DL);
523
524
}

525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
int wait_CCs(eNB_rxtx_proc_t *proc) {

  struct timespec wait;

  wait.tv_sec=0;
  wait.tv_nsec=5000000L;

  if (pthread_mutex_timedlock(&sync_phy_proc.mutex_phy_proc_tx,&wait) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error locking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  
  // wait for our turn or oai_exit
  while (sync_phy_proc.phy_proc_CC_id != proc->CC_id && !oai_exit) {
    pthread_cond_wait(&sync_phy_proc.cond_phy_proc_tx,
		      &sync_phy_proc.mutex_phy_proc_tx);
  }
  
  if (pthread_mutex_unlock(&sync_phy_proc.mutex_phy_proc_tx) != 0) {
    LOG_E(PHY, "[SCHED][eNB] error unlocking PHY proc mutex for eNB TX\n");
    exit_fun("nothing to add");
    return(-1);
  }
  return(0);
}
Sandeep Kumar's avatar
Sandeep Kumar committed
551

knopp's avatar
knopp committed
552
553
554
static inline int rxtx(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc, char *thread_name) {

  start_meas(&softmodem_stats_rxtx_sf);
555

knopp's avatar
knopp committed
556
557
  // ****************************************
  // Common RX procedures subframe n
558

knopp's avatar
knopp committed
559
560
  if ((eNB->do_prach)&&((eNB->node_function != NGFI_RCC_IF4p5)))
    eNB->do_prach(eNB,proc->frame_rx,proc->subframe_rx);
561
  phy_procedures_eNB_common_RX(eNB,proc);
knopp's avatar
knopp committed
562
563
564
565
566
567
568
569
570
  
  // UE-specific RX processing for subframe n
  if (eNB->proc_uespec_rx) eNB->proc_uespec_rx(eNB, proc, no_relay );
  
  // *****************************************
  // TX processing for subframe n+4
  // run PHY TX procedures the one after the other for all CCs to avoid race conditions
  // (may be relaxed in the future for performance reasons)
  // *****************************************
571
  //if (wait_CCs(proc)<0) return(-1);
knopp's avatar
knopp committed
572
573
574
575
576
577
578
579
580
581
582
583
  
  if (oai_exit) return(-1);
  
  if (eNB->proc_tx)	eNB->proc_tx(eNB, proc, no_relay, NULL );
  
  if (release_thread(&proc->mutex_rxtx,&proc->instance_cnt_rxtx,thread_name)<0) return(-1);

  stop_meas( &softmodem_stats_rxtx_sf );
  
  return(0);
}

584
/*!
knopp's avatar
knopp committed
585
 * \brief The RX UE-specific and TX thread of eNB.
586
587
588
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
Sandeep Kumar's avatar
Sandeep Kumar committed
589
590
static void* eNB_thread_rxtx( void* param ) {

knopp's avatar
knopp committed
591
  static int eNB_thread_rxtx_status;
592

knopp's avatar
knopp committed
593
  eNB_rxtx_proc_t *proc = (eNB_rxtx_proc_t*)param;
594
595
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];

knopp's avatar
knopp committed
596
597
  char thread_name[100];

598

599
  // set default return value
knopp's avatar
knopp committed
600
  eNB_thread_rxtx_status = 0;
601
602


knopp's avatar
knopp committed
603
  sprintf(thread_name,"RXn_TXnp4_%d\n",&eNB->proc.proc_rxtx[0] == proc ? 0 : 1);
604
  thread_top_init(thread_name,1,850000L,1000000L,2000000L);
605
606

  while (!oai_exit) {
knopp's avatar
knopp committed
607
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 0 );
608

knopp's avatar
knopp committed
609
    if (wait_on_condition(&proc->mutex_rxtx,&proc->cond_rxtx,&proc->instance_cnt_rxtx,thread_name)<0) break;
610

knopp's avatar
knopp committed
611
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 1 );
612

knopp's avatar
knopp committed
613
    
614
  
615
616
    if (oai_exit) break;

617
618
    if (eNB->CC_id==0)
      if (rxtx(eNB,proc,thread_name) < 0) break;
619

knopp's avatar
knopp committed
620
  } // while !oai_exit
621

knopp's avatar
knopp committed
622
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_eNB_PROC_RXTX0+(proc->subframe_rx&1), 0 );
623

Raymond Knopp's avatar
Raymond Knopp committed
624
  printf( "Exiting eNB thread RXn_TXnp4\n");
625

knopp's avatar
knopp committed
626
627
  eNB_thread_rxtx_status = 0;
  return &eNB_thread_rxtx_status;
628
629
}

630
#if defined(ENABLE_ITTI) && defined(ENABLE_USE_MME)
Sandeep Kumar's avatar
Sandeep Kumar committed
631
632
633
/* Wait for eNB application initialization to be complete (eNB registration to MME) */
static void wait_system_ready (char *message, volatile int *start_flag) {
  
634
  static char *indicator[] = {".    ", "..   ", "...  ", ".... ", ".....",
Sandeep Kumar's avatar
Sandeep Kumar committed
635
			      " ....", "  ...", "   ..", "    .", "     "};
636
637
638
639
640
641
642
  int i = 0;
  
  while ((!oai_exit) && (*start_flag == 0)) {
    LOG_N(EMU, message, indicator[i]);
    fflush(stdout);
    i = (i + 1) % (sizeof(indicator) / sizeof(indicator[0]));
    usleep(200000);
643
  }
644
645
  
  LOG_D(EMU,"\n");
646
647
}
#endif
648

knopp's avatar
knopp committed
649

650
// asynchronous UL with IF5 (RCC,RAU,eNodeB_BBU)
knopp's avatar
knopp committed
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
void fh_if5_asynch_UL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  eNB_proc_t *proc       = &eNB->proc;
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;

  recv_IF5(eNB, &proc->timestamp_rx, *subframe, IF5_RRH_GW_UL); 

  proc->subframe_rx = (proc->timestamp_rx/fp->samples_per_tti)%10;
  proc->frame_rx    = (proc->timestamp_rx/(10*fp->samples_per_tti))&1023;

  if (proc->first_rx != 0) {
    proc->first_rx = 0;
    *subframe = proc->subframe_rx;
    *frame    = proc->frame_rx; 
  }
  else {
    if (proc->subframe_rx != *subframe) {
668
      LOG_E(PHY,"fh_if5_asynch_UL: subframe_rx %d is not what we expect %d\n",proc->subframe_rx,*subframe);
knopp's avatar
knopp committed
669
670
671
      exit_fun("Exiting");
    }
    if (proc->frame_rx != *frame) {
672
      LOG_E(PHY,"fh_if5_asynch_UL: subframe_rx %d is not what we expect %d\n",proc->frame_rx,*frame);  
knopp's avatar
knopp committed
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
      exit_fun("Exiting");
    }
  }
} // eNodeB_3GPP_BBU 

// asynchronous UL with IF4p5 (RCC,RAU,eNodeB_BBU)
void fh_if4p5_asynch_UL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;

  uint16_t packet_type;
  uint32_t symbol_number,symbol_mask,symbol_mask_full,prach_rx;


  symbol_number = 0;
  symbol_mask = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;
  prach_rx = 0;

  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &proc->frame_rx, &proc->subframe_rx, &packet_type, &symbol_number);
    if (proc->first_rx != 0) {
      *frame = proc->frame_rx;
      *subframe = proc->subframe_rx;
      proc->first_rx = 0;
    }
    else {
      if (proc->frame_rx != *frame) {
702
	LOG_E(PHY,"fh_if4p5_asynch_UL: frame_rx %d is not what we expect %d\n",proc->frame_rx,*frame);
knopp's avatar
knopp committed
703
704
705
	exit_fun("Exiting");
      }
      if (proc->subframe_rx != *subframe) {
706
	LOG_E(PHY,"fh_if4p5_asynch_UL: subframe_rx %d is not what we expect %d\n",proc->subframe_rx,*subframe);
knopp's avatar
knopp committed
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
	exit_fun("Exiting");
      }
    }
    if (packet_type == IF4p5_PULFFT) {
      symbol_mask = symbol_mask | (1<<symbol_number);
      prach_rx = (is_prach_subframe(fp, proc->frame_rx, proc->subframe_rx)>0) ? 1 : 0;                            
    } else if (packet_type == IF4p5_PRACH) {
      prach_rx = 0;
    }
  } while( (symbol_mask != symbol_mask_full) || (prach_rx == 1));    
  

} 


void fh_if5_asynch_DL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;
  int subframe_tx,frame_tx;
  openair0_timestamp timestamp_tx;

  recv_IF5(eNB, &timestamp_tx, *subframe, IF5_RRH_GW_DL); 
knopp's avatar
knopp committed
730
  //printf("Received subframe %d (TS %llu) from RCC\n",subframe_tx,timestamp_tx);
knopp's avatar
knopp committed
731
732
733
734

  subframe_tx = (timestamp_tx/fp->samples_per_tti)%10;
  frame_tx    = (timestamp_tx/(fp->samples_per_tti*10))&1023;

knopp's avatar
knopp committed
735
736
737
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB, frame_tx );
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB, subframe_tx );

knopp's avatar
knopp committed
738
739
740
741
742
743
744
  if (proc->first_tx != 0) {
    *subframe = subframe_tx;
    *frame    = frame_tx;
    proc->first_tx = 0;
  }
  else {
    if (subframe_tx != *subframe) {
745
      LOG_E(PHY,"fh_if5_asynch_DL: subframe_tx %d is not what we expect %d\n",subframe_tx,*subframe);
knopp's avatar
knopp committed
746
747
748
      exit_fun("Exiting");
    }
    if (frame_tx != *frame) { 
749
      LOG_E(PHY,"fh_if5_asynch_DL: frame_tx %d is not what we expect %d\n",frame_tx,*frame);
knopp's avatar
knopp committed
750
751
752
753
754
755
756
757
758
759
760
      exit_fun("Exiting");
    }
  }
}

void fh_if4p5_asynch_DL(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  eNB_proc_t *proc       = &eNB->proc;

  uint16_t packet_type;
761
  uint32_t symbol_number,symbol_mask_full;
knopp's avatar
knopp committed
762
763
764
765
766
767
768
769
770
771
772
  int subframe_tx,frame_tx;

  symbol_number = 0;
  symbol_mask_full = (1<<fp->symbols_per_tti)-1;

  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
    recv_IF4p5(eNB, &frame_tx, &subframe_tx, &packet_type, &symbol_number);
    if (proc->first_tx != 0) {
      *frame    = frame_tx;
      *subframe = subframe_tx;
      proc->first_tx = 0;
knopp's avatar
knopp committed
773
      proc->frame_offset = frame_tx - proc->frame_tx;
knopp's avatar
knopp committed
774
775
776
    }
    else {
      if (frame_tx != *frame) {
777
	LOG_E(PHY,"fh_if4p5_asynch_DL: frame_tx %d is not what we expect %d\n",frame_tx,*frame);
knopp's avatar
knopp committed
778
	exit_fun("Exiting");
knopp's avatar
knopp committed
779
780
      }
      if (subframe_tx != *subframe) {
781
782
	LOG_E(PHY,"fh_if4p5_asynch_DL: (frame %d) subframe_tx %d is not what we expect %d\n",frame_tx,subframe_tx,*subframe);
	//*subframe = subframe_tx;
knopp's avatar
knopp committed
783
	exit_fun("Exiting");
knopp's avatar
knopp committed
784
785
786
      }
    }
    if (packet_type == IF4p5_PDLFFT) {
787
      proc->symbol_mask[subframe_tx] =proc->symbol_mask[subframe_tx] | (1<<symbol_number);
knopp's avatar
knopp committed
788
789
790
791
792
    }
    else {
      LOG_E(PHY,"Illegal IF4p5 packet type (should only be IF4p5_PDLFFT%d\n",packet_type);
      exit_fun("Exiting");
    }
793
794
  } while (proc->symbol_mask[*subframe] != symbol_mask_full);    

knopp's avatar
knopp committed
795
796
  *frame = frame_tx;

knopp's avatar
knopp committed
797

knopp's avatar
knopp committed
798
799
800
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_FRAME_NUMBER_TX0_ENB, frame_tx );
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_SUBFRAME_NUMBER_TX0_ENB, subframe_tx );

801
802
  // intialize this to zero after we're done with the subframe
  proc->symbol_mask[*subframe] = 0;
knopp's avatar
knopp committed
803
  
804
  do_OFDM_mod_rt(*subframe, eNB);
knopp's avatar
knopp committed
805
806
} 

807
/*!
808
 * \brief The Asynchronous RX/TX FH thread of RAU/RCC/eNB/RRU.
809
810
811
812
 * This handles the RX FH for an asynchronous RRU/UE
 * \param param is a \ref eNB_proc_t structure which contains the info what to process.
 * \returns a pointer to an int. The storage is not on the heap and must not be freed.
 */
813
static void* eNB_thread_asynch_rxtx( void* param ) {
814

815
  static int eNB_thread_asynch_rxtx_status;
Raymond Knopp's avatar
Raymond Knopp committed
816

817
818
  eNB_proc_t *proc = (eNB_proc_t*)param;
  PHY_VARS_eNB *eNB = PHY_vars_eNB_g[0][proc->CC_id];
knopp's avatar
knopp committed
819
820


821

knopp's avatar
knopp committed
822
  int subframe=0, frame=0; 
823

824
  thread_top_init("thread_asynch",1,870000L,1000000L,1000000L);
825
826
827

  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe

knopp's avatar
knopp committed
828
  wait_sync("thread_asynch");
829

830
831
  // wait for top-level synchronization and do one acquisition to get timestamp for setting frame/subframe
  printf( "waiting for devices (eNB_thread_asynch_rx)\n");
832

knopp's avatar
knopp committed
833
  wait_on_condition(&proc->mutex_asynch_rxtx,&proc->cond_asynch_rxtx,&proc->instance_cnt_asynch_rxtx,"thread_asynch");
834

835
836
837
  printf( "devices ok (eNB_thread_asynch_rx)\n");


knopp's avatar
knopp committed
838
839
840
  while (!oai_exit) { 
   
    if (oai_exit) break;   
841

knopp's avatar
knopp committed
842
843
844
845
846
847
848
    if (subframe==9) { 
      subframe=0;
      frame++;
      frame&=1023;
    } else {
      subframe++;
    }      
849

knopp's avatar
knopp committed
850
851
852
    if (eNB->fh_asynch) eNB->fh_asynch(eNB,&frame,&subframe);
    else AssertFatal(1==0, "Unknown eNB->node_function %d",eNB->node_function);
    
853
  }
854

855
856
  eNB_thread_asynch_rxtx_status=0;
  return(&eNB_thread_asynch_rxtx_status);
857
}
Sandeep Kumar's avatar
Sandeep Kumar committed
858

859

knopp's avatar
knopp committed
860
861
862
863
864
865



void rx_rf(PHY_VARS_eNB *eNB,int *frame,int *subframe) {

  eNB_proc_t *proc = &eNB->proc;
866
867
868
869
  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
  void *rxp[fp->nb_antennas_rx],*txp[fp->nb_antennas_tx]; 
  unsigned int rxs,txs;
  int i;
870
  int tx_sfoffset = (eNB->single_thread_flag == 1) ? 3 : 2;
871
  openair0_timestamp ts,old_ts;
knopp's avatar
knopp committed
872

873
874
  if (proc->first_rx==0) {
    
875
    // Transmit TX buffer based on timestamp from RX
876
    //    printf("trx_write -> USRP TS %llu (sf %d)\n", (proc->timestamp_rx+(3*fp->samples_per_tti)),(proc->subframe_rx+2)%10);
877
    VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TST, (proc->timestamp_rx+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance)&0xffffffff );
878
879
880
881
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 1 );
    // prepare tx buffer pointers
	
    for (i=0; i<fp->nb_antennas_tx; i++)
882
      txp[i] = (void*)&eNB->common_vars.txdata[0][i][((proc->subframe_rx+tx_sfoffset)%10)*fp->samples_per_tti]; 
883
884
    
    txs = eNB->rfdevice.trx_write_func(&eNB->rfdevice,
885
				       proc->timestamp_rx+eNB->ts_offset+(tx_sfoffset*fp->samples_per_tti)-openair0_cfg[0].tx_sample_advance,
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
				       txp,
				       fp->samples_per_tti,
				       fp->nb_antennas_tx,
				       1);
    
    VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
    
    
    
    if (txs !=  fp->samples_per_tti) {
      LOG_E(PHY,"TX : Timeout (sent %d/%d)\n",txs, fp->samples_per_tti);
      exit_fun( "problem transmitting samples" );
    }	
  }
  
  for (i=0; i<fp->nb_antennas_rx; i++)
    rxp[i] = (void*)&eNB->common_vars.rxdata[0][i][*subframe*fp->samples_per_tti];
  
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 1 );
905

knopp's avatar
knopp committed
906
907
  old_ts = proc->timestamp_rx;

908
  rxs = eNB->rfdevice.trx_read_func(&eNB->rfdevice,
909
				    &ts,
910
911
912
				    rxp,
				    fp->samples_per_tti,
				    fp->nb_antennas_rx);
Raymond Knopp's avatar
Raymond Knopp committed
913

914
915
  proc->timestamp_rx = ts-eNB->ts_offset;

916
  if (rxs != fp->samples_per_tti)
knopp's avatar
knopp committed
917
    LOG_E(PHY,"rx_rf: Asked for %d samples, got %d from USRP\n",fp->samples_per_tti,rxs);
918

Raymond Knopp's avatar
Raymond Knopp committed
919
  VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_READ, 0 );
knopp's avatar
knopp committed
920
 
921
  if (proc->first_rx == 1) {
knopp's avatar
knopp committed
922
    eNB->ts_offset = proc->timestamp_rx;
923
924
    proc->timestamp_rx=0;
  }
knopp's avatar
knopp committed
925
  else {
926

knopp's avatar
knopp committed
927
    if (proc->timestamp_rx - old_ts != fp->samples_per_tti) {
928
929
      LOG_I(PHY,"rx_rf: rfdevice timing drift of %d samples\n",proc->timestamp_rx - old_ts - fp->samples_per_tti);
      eNB->ts_offset += (proc->timestamp_rx - old_ts - fp->samples_per_tti);
930
      proc->timestamp_rx = ts-eNB->ts_offset;
knopp's avatar
knopp committed
931
932
    }
  }
933
934
  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
935
  proc->frame_rx    = (proc->frame_rx+proc->frame_offset)&1023;
knopp's avatar
knopp committed
936
  proc->frame_tx    = proc->frame_rx;
937
  if (proc->subframe_rx > 5) proc->frame_tx=(proc->frame_tx+1)&1023;
knopp's avatar
knopp committed
938
939
  // synchronize first reception to frame 0 subframe 0

940
  proc->timestamp_tx = proc->timestamp_rx+(4*fp->samples_per_tti);
941
  //  printf("trx_read <- USRP TS %lu (offset %d sf %d, f %d, first_rx %d)\n", proc->timestamp_rx,eNB->ts_offset,proc->subframe_rx,proc->frame_rx,proc->first_rx);  
942
943
944
  
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
945
      LOG_E(PHY,"rx_rf: Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->timestamp_rx,proc->subframe_rx,*subframe);
946
947
      exit_fun("Exiting");
    }
948
    int f2 = (*frame+proc->frame_offset)&1023;    
knopp's avatar
knopp committed
949
    if (proc->frame_rx != f2) {
950
      LOG_E(PHY,"rx_rf: Received Timestamp (%llu) doesn't correspond to the time we think it is (proc->frame_rx %d frame %d, frame_offset %d, f2 %d)\n",proc->timestamp_rx,proc->frame_rx,*frame,proc->frame_offset,f2);
951
952
953
954
955
956
957
958
959
960
961
962
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
  }
  
  //printf("timestamp_rx %lu, frame %d(%d), subframe %d(%d)\n",proc->timestamp_rx,proc->frame_rx,frame,proc->subframe_rx,subframe);
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
  
Raymond Knopp's avatar
Raymond Knopp committed
963
964
965
966
967
  if (rxs != fp->samples_per_tti)
    exit_fun( "problem receiving samples" );
  

  
968
969
}

knopp's avatar
knopp committed
970
void rx_fh_if5(PHY_VARS_eNB *eNB,int *frame, int *subframe) {
971
972

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
knopp's avatar
knopp committed
973
  eNB_proc_t *proc = &eNB->proc;
974
975
976

  recv_IF5(eNB, &proc->timestamp_rx, *subframe, IF5_RRH_GW_UL); 

977
978
  proc->frame_rx    = (proc->timestamp_rx / (fp->samples_per_tti*10))&1023;
  proc->subframe_rx = (proc->timestamp_rx / fp->samples_per_tti)%10;
979
980
  
  if (proc->first_rx == 0) {
Raymond Knopp's avatar
Raymond Knopp committed
981
    if (proc->subframe_rx != *subframe){
knopp's avatar
knopp committed
982
      LOG_E(PHY,"rx_fh_if5: Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d)\n",proc->subframe_rx,subframe);
983
984
985
      exit_fun("Exiting");
    }
    
Raymond Knopp's avatar
Raymond Knopp committed
986
    if (proc->frame_rx != *frame) {
knopp's avatar
knopp committed
987
      LOG_E(PHY,"rx_fh_if5: Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d)\n",proc->frame_rx,frame);
988
989
990
991
      exit_fun("Exiting");
    }
  } else {
    proc->first_rx = 0;
Raymond Knopp's avatar
Raymond Knopp committed
992
993
    *frame = proc->frame_rx;
    *subframe = proc->subframe_rx;        
994
  }      
knopp's avatar
knopp committed
995

996
997


knopp's avatar
knopp committed
998
  proc->timestamp_tx = proc->timestamp_rx +  (4*fp->samples_per_tti);
999
1000
1001
1002
1003
  
  VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );

}

knopp's avatar
knopp committed
1004

1005
void rx_fh_if4p5(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
1006
1007

  LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
1008
  eNB_proc_t *proc = &eNB->proc;
1009
  int f,sf;
1010
1011
1012
1013
1014
1015

  uint16_t packet_type;
  uint32_t symbol_number=0;
  uint32_t symbol_mask, symbol_mask_full;

  symbol_mask_full = (1<<fp->symbols_per_tti)-1;
Raymond Knopp's avatar
Raymond Knopp committed
1016

1017
  if (eNB->CC_id==1) LOG_I(PHY,"rx_fh_if4p5: frame %d, subframe %d\n",*frame,*subframe);
1018
  do {   // Blocking, we need a timeout on this !!!!!!!!!!!!!!!!!!!!!!!
1019
    recv_IF4p5(eNB, &f, &sf, &packet_type, &symbol_number);
1020

1021
    //proc->frame_rx = (proc->frame_rx + proc->frame_offset)&1023;
1022
    if (packet_type == IF4p5_PULFFT) {
knopp's avatar
knopp committed
1023
      LOG_D(PHY,"rx_fh:if4p5: frame %d, subframe %d, PULFFT symbol %d\n",f,sf,symbol_number);
1024

knopp's avatar
knopp committed
1025
      proc->symbol_mask[sf] = proc->symbol_mask[sf] | (1<<symbol_number);
1026
    } else if (packet_type == IF4p5_PRACH) {
knopp's avatar
knopp committed
1027
      LOG_D(PHY,"rx_fh:if4p5: frame %d, subframe %d, PRACH\n",f,sf);
1028
1029
      // wakeup prach processing
      if (eNB->do_prach) eNB->do_prach(eNB,f,sf);
1030
    }
Raymond Knopp's avatar
Raymond Knopp committed
1031

knopp's avatar
knopp committed
1032
    if (eNB->CC_id==1) LOG_I(PHY,"rx_fh_if4p5: symbol_mask[%d] %x\n",*subframe,proc->symbol_mask[*subframe]);
1033

knopp's avatar
knopp committed
1034
  } while(proc->symbol_mask[*subframe] != symbol_mask_full);    
knopp's avatar
knopp committed
1035
1036
1037
  proc->subframe_rx = *subframe;
  proc->frame_rx = *frame;

1038
1039
1040
1041
  proc->symbol_mask[*subframe] = 0;
  proc->symbol_mask[(9+*subframe)%10]= 0; // to handle a resynchronization event

  if (eNB->CC_id==1) LOG_I(PHY,"Clearing symbol_mask[%d]\n",*subframe);
1042
1043

  //caculate timestamp_rx, timestamp_tx based on frame and subframe
1044
1045
1046
  proc->timestamp_rx = ((proc->frame_rx * 10)  + proc->subframe_rx ) * fp->samples_per_tti ;
  proc->timestamp_tx = proc->timestamp_rx +  (4*fp->samples_per_tti);
  
1047
 
1048
1049
  if (proc->first_rx == 0) {
    if (proc->subframe_rx != *subframe){
1050
      LOG_E(PHY,"rx_fh_if4p5, CC_id %d: Received Timestamp doesn't correspond to the time we think it is (proc->subframe_rx %d, subframe %d,CCid %d)\n",eNB->CC_id,proc->subframe_rx,*subframe,eNB->CC_id);
1051
1052
    }
    if (proc->frame_rx != *frame) {
1053
1054
1055
1056
      if (proc->frame_rx == proc->frame_offset) // This means that the RRU has adjusted its frame timing
	proc->frame_offset = 0;
      else 
	LOG_E(PHY,"rx_fh_if4p5: Received Timestamp doesn't correspond to the time we think it is (proc->frame_rx %d frame %d,CCid %d)\n",proc->frame_rx,*frame,eNB->CC_id);
1057
1058
1059
    }
  } else {
    proc->first_rx = 0;
1060
1061
1062
1063
1064
    if (eNB->CC_id==0)
      proc->frame_offset = 0;
    else
      proc->frame_offset = PHY_vars_eNB_g[0][0]->proc.frame_rx;

1065
    *frame = proc->frame_rx;//(proc->frame_rx + proc->frame_offset)&1023;
1066
1067
1068
    *subframe = proc->subframe_rx;        
  }
  
1069
1070
1071


  if (eNB->CC_id==0) VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME( VCD_SIGNAL_DUMPER_VARIABLES_TRX_TS, proc->timestamp_rx&0xffffffff );
1072
1073
1074
  
}

knopp's avatar
knopp committed
1075
1076
void rx_fh_slave(PHY_VARS_eNB *eNB,int *frame,int *subframe) {
  // This case is for synchronization to another thread
1077
  // it just waits for an external event.  The actual rx_fh is handle by the asynchronous RX thread
knopp's avatar
knopp committed
1078
1079
  eNB_proc_t *proc=&eNB->proc;

knopp's avatar
knopp committed
1080
1081
1082
1083
1084
  if (wait_on_condition(&proc->mutex_FH,&proc->cond_FH,&proc->instance_cnt_FH,"rx_fh_slave") < 0)
    return;

  release_thread(&proc->mutex_FH,&proc->instance_cnt_FH,"rx_fh_slave");

knopp's avatar
knopp committed
1085
1086
1087
1088
  
}


1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
int wakeup_rxtx(eNB_proc_t *proc,eNB_rxtx_proc_t *proc_rxtx,LTE_DL_FRAME_PARMS *fp) {

  int i;
  struct timespec wait;
  
  wait.tv_sec=0