rar_tools.c 11.1 KB
Newer Older
1
/*******************************************************************************
2 3
    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
4

5 6 7 8
    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
9 10


11 12 13 14
    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
15

16 17 18 19
    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
   see <http://www.gnu.org/licenses/>.
20 21

  Contact Information
22 23
  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
24
  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
25

ghaddab's avatar
ghaddab committed
26
  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
27 28

*******************************************************************************/
29 30

/*! \file rar_tools.c
31
 * \brief random access tools
32 33
 * \author Raymond Knopp and navid nikaein
 * \date 2011 - 2014
34
 * \version 1.0
35
 * @ingroup _mac
36

37
 */
38 39

#include "defs.h"
40
#include "proto.h"
41 42 43 44 45
#include "extern.h"
#include "SIMULATION/TOOLS/defs.h"
#include "UTIL/LOG/log.h"
#include "OCG.h"
#include "OCG_extern.h"
46
#include "UTIL/OPT/opt.h"
47 48 49 50 51 52 53 54

#define DEBUG_RAR

extern unsigned int  localRIV2alloc_LUT25[512];
extern unsigned int  distRIV2alloc_LUT25[512];
extern unsigned short RIV2nb_rb_LUT25[512];
extern unsigned short RIV2first_rb_LUT25[512];

55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
#if FAPI

//------------------------------------------------------------------------------
unsigned short fill_rar(
  const module_id_t module_idP,
  const int         CC_id,
  const frame_t     frameP,
  uint8_t* const    dlsch_buffer,
  const uint16_t    N_RB_UL,
  const uint8_t     input_buffer_length
)
//------------------------------------------------------------------------------
{
  RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *)dlsch_buffer;
  uint8_t         *rar = (uint8_t *)(dlsch_buffer+1);
  int             i;
  int             ra_idx = -1;
  uint32_t        ul_grant;

  AssertFatal(CC_id < MAX_NUM_CCs, "CC_id %u < MAX_NUM_CCs %u", CC_id, MAX_NUM_CCs);

  for (i=0; i<NB_RA_PROC_MAX; i++) {
    if (eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[i].generate_rar == 1) {
      ra_idx=i;
      eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[i].generate_rar = 0;
      break;
    }
  }

  if (ra_idx==-1)
    return(0);

  ul_grant = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[i].UL_grant;

  // subheader fixed
  rarh->E                     = 0; // First and last RAR
  rarh->T                     = 1; // 0 for E/T/R/R/BI subheader, 1 for E/T/RAPID subheader
  rarh->RAPID                 = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].preamble_index; // Respond to Preamble 0 only for the moment
  rar[4] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti>>8);
  rar[5] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti&0xff);
  eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
  rar[0] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4
  rar[1] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4
  rar[1] |= (ul_grant >> 16) & 0x0f;
  rar[2] = (ul_grant >> 8) & 0xff;
  rar[3] = ul_grant & 0xff;
  LOG_I(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d Generating RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for ra_idx %d, CRNTI %x,preamble %d/%d,TIMING OFFSET %d\n",
        module_idP, CC_id,
        frameP,
        *(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
        ra_idx,
        eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti,
        rarh->RAPID,eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[0].preamble_index,
        eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset);

  if (opt_enabled) {
    trace_pdu(1, dlsch_buffer, input_buffer_length, module_idP, 2, 1,
              eNB_mac_inst[module_idP].subframe, 0, 0);
    LOG_D(OPT,"[eNB %d][RAPROC] CC_id %d RAR Frame %d trace pdu for rnti %x and  rapid %d size %d\n",
          module_idP, CC_id, frameP, eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti,
          rarh->RAPID, input_buffer_length);
  }

  return(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti);
}

#else /* FAPI */

123 124 125 126 127 128 129 130 131 132
//------------------------------------------------------------------------------
unsigned short fill_rar(
  const module_id_t module_idP,
  const int         CC_id,
  const frame_t     frameP,
  uint8_t*    const dlsch_buffer,
  const uint16_t    N_RB_UL,
  const uint8_t input_buffer_length
)
//------------------------------------------------------------------------------
133
{
134 135 136 137

  RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *)dlsch_buffer;
  //  RAR_PDU *rar = (RAR_PDU *)(dlsch_buffer+1);
  uint8_t *rar = (uint8_t *)(dlsch_buffer+1);
138
  int i,ra_idx = -1;
139
  uint16_t rballoc;
140
  uint8_t mcs,TPC,ULdelay,cqireq;
141
  AssertFatal(CC_id < MAX_NUM_CCs, "CC_id %u < MAX_NUM_CCs %u", CC_id, MAX_NUM_CCs);
142

143 144 145 146 147 148
  for (i=0; i<NB_RA_PROC_MAX; i++) {
    if (eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[i].generate_rar == 1) {
      ra_idx=i;
      eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[i].generate_rar = 0;
      break;
    }
149 150
  }

151 152 153
  //DevAssert( ra_idx != -1 );
  if (ra_idx==-1)
    return(0);
154

155
  // subheader fixed
156 157
  rarh->E                     = 0; // First and last RAR
  rarh->T                     = 1; // 0 for E/T/R/R/BI subheader, 1 for E/T/RAPID subheader
Raymond Knopp's avatar
 
Raymond Knopp committed
158
  rarh->RAPID                 = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].preamble_index; // Respond to Preamble 0 only for the moment
159 160
  /*
  rar->R                      = 0;
Raymond Knopp's avatar
 
Raymond Knopp committed
161
  rar->Timing_Advance_Command = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset/4;
162 163 164 165 166 167
  rar->hopping_flag           = 0;
  rar->rb_alloc               = mac_xface->computeRIV(N_RB_UL,12,2);  // 2 RB
  rar->mcs                    = 2;                                   // mcs 2
  rar->TPC                    = 4;   // 2 dB power adjustment
  rar->UL_delay               = 0;
  rar->cqi_req                = 1;
Raymond Knopp's avatar
 
Raymond Knopp committed
168
  rar->t_crnti                = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti;
169
   */
Raymond Knopp's avatar
 
Raymond Knopp committed
170 171
  rar[4] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti>>8);
  rar[5] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti&0xff);
172
  //eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset = 0;
knopp's avatar
knopp committed
173
  eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
Raymond Knopp's avatar
 
Raymond Knopp committed
174 175
  rar[0] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4
  rar[1] = (uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4
176
  rballoc = mac_xface->computeRIV(N_RB_UL,0,1); // first PRB only for UL Grant
177 178
  rar[1] |= (rballoc>>7)&7; // Hopping = 0 (bit 3), 3 MSBs of rballoc
  rar[2] = ((uint8_t)(rballoc&0xff))<<1; // 7 LSBs of rballoc
Raymond Knopp's avatar
Raymond Knopp committed
179 180
  mcs = 10;
  TPC = 3;
181 182
  ULdelay = 0;
  cqireq = 0;
Raymond Knopp's avatar
Raymond Knopp committed
183
  rar[2] |= ((mcs&0x8)>>3);  // mcs 10
184
  rar[3] = (((mcs&0x7)<<5)) | ((TPC&7)<<2) | ((ULdelay&1)<<1) | (cqireq&1);
185

186
  LOG_D(MAC,"[eNB %d][RAPROC] CC_id %d Frame %d Generating RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for ra_idx %d, CRNTI %x,preamble %d/%d,TIMING OFFSET %d\n",
187
        module_idP, CC_id,
188
        frameP,
189 190 191 192 193
        *(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
        ra_idx,
        eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti,
        rarh->RAPID,eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[0].preamble_index,
        eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset);
194

195
  if (opt_enabled) {
196
    trace_pdu(1, dlsch_buffer, input_buffer_length, module_idP, 2, 1,
197
              eNB_mac_inst[module_idP].subframe, 0, 0);
198 199
    LOG_D(OPT,"[eNB %d][RAPROC] CC_id %d RAR Frame %d trace pdu for rnti %x and  rapid %d size %d\n",
          module_idP, CC_id, frameP, eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti,
200
          rarh->RAPID, input_buffer_length);
201
  }
202

Raymond Knopp's avatar
 
Raymond Knopp committed
203
  return(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti);
204 205
}

206 207
#endif /* FAPI */

208 209 210 211 212 213 214 215 216 217 218
//------------------------------------------------------------------------------
uint16_t
ue_process_rar(
  const module_id_t module_idP,
  const int CC_id,
  const frame_t frameP,
  uint8_t* const dlsch_buffer,
  rnti_t* const t_crnti,
  const uint8_t preamble_index
)
//------------------------------------------------------------------------------
219
{
220 221 222 223

  RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *)dlsch_buffer;
  //  RAR_PDU *rar = (RAR_PDU *)(dlsch_buffer+1);
  uint8_t *rar = (uint8_t *)(dlsch_buffer+1);
224

Raymond Knopp's avatar
 
Raymond Knopp committed
225 226 227 228 229
  if (CC_id>0) {
    LOG_W(MAC,"Should not have received RAR on secondary CCs! \n");
    return(0xffff);
  }

230
  LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Received RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for preamble %d/%d\n",module_idP,frameP,
231 232
        *(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
        rarh->RAPID,preamble_index);
233
#ifdef DEBUG_RAR
234 235 236 237 238
  LOG_D(MAC,"[UE %d][RAPROC] rarh->E %d\n",module_idP,rarh->E);
  LOG_D(MAC,"[UE %d][RAPROC] rarh->T %d\n",module_idP,rarh->T);
  LOG_D(MAC,"[UE %d][RAPROC] rarh->RAPID %d\n",module_idP,rarh->RAPID);

  //  LOG_I(MAC,"[UE %d][RAPROC] rar->R %d\n",module_idP,rar->R);
239
  LOG_D(MAC,"[UE %d][RAPROC] rar->Timing_Advance_Command %d\n",module_idP,(((uint16_t)(rar[0]&0x7f))<<4) + (rar[1]>>4));
240 241 242 243 244 245
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->hopping_flag %d\n",module_idP,rar->hopping_flag);
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->rb_alloc %d\n",module_idP,rar->rb_alloc);
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->mcs %d\n",module_idP,rar->mcs);
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->TPC %d\n",module_idP,rar->TPC);
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->UL_delay %d\n",module_idP,rar->UL_delay);
  //  LOG_I(MAC,"[UE %d][RAPROC] rar->cqi_req %d\n",module_idP,rar->cqi_req);
246
  LOG_D(MAC,"[UE %d][RAPROC] rar->t_crnti %x\n",module_idP,(uint16_t)rar[5]+(rar[4]<<8));
247 248
#endif

249

250
  if (preamble_index == rarh->RAPID) {
251 252 253 254 255 256 257
    *t_crnti = (uint16_t)rar[5]+(rar[4]<<8);//rar->t_crnti;
    UE_mac_inst[module_idP].crnti = *t_crnti;//rar->t_crnti;
    //return(rar->Timing_Advance_Command);
    return((((uint16_t)(rar[0]&0x7f))<<4) + (rar[1]>>4));
  } else {
    UE_mac_inst[module_idP].crnti=0;
    return(0xffff);
258 259
  }
}