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openairinterface5g/openair2/LAYER2/MAC/rar_tools.c
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/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
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.
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.
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/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file rar_tools.c
* \brief random access tools
* \author Raymond Knopp and navid nikaein
* \date 2011 - 2014
* \version 1.0
* @ingroup _mac
*/
#include "defs.h"
#include "proto.h"
#include "extern.h"
#include "MAC_INTERFACE/defs.h"
#include "MAC_INTERFACE/extern.h"
#include "SIMULATION/TOOLS/defs.h"
#include "UTIL/LOG/log.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "UTIL/OPT/opt.h"
#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];
//------------------------------------------------------------------------------
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;
// RAR_PDU *rar = (RAR_PDU *)(dlsch_buffer+1);
uint8_t *rar = (uint8_t *)(dlsch_buffer+1);
int i,ra_idx = -1;
uint16_t rballoc;
uint8_t mcs,TPC,ULdelay,cqireq;
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;
}
}
//DevAssert( ra_idx != -1 );
if (ra_idx==-1)
return(0);
// 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->R = 0;
rar->Timing_Advance_Command = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset/4;
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;
rar->t_crnti = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti;
*/
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 = 0;
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
rballoc = mac_xface->computeRIV(N_RB_UL,1,1); // first PRB only for UL Grant
rar[1] |= (rballoc>>7)&7; // Hopping = 0 (bit 3), 3 MSBs of rballoc
rar[2] = ((uint8_t)(rballoc&0xff))<<1; // 7 LSBs of rballoc
mcs = 10;
TPC = 3;
ULdelay = 0;
cqireq = 0;
rar[2] |= ((mcs&0x8)>>3); // mcs 10
rar[3] = (((mcs&0x7)<<5)) | ((TPC&7)<<2) | ((ULdelay&1)<<1) | (cqireq&1);
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);
}
//------------------------------------------------------------------------------
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
)
//------------------------------------------------------------------------------
{
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);
if (CC_id>0) {
LOG_W(MAC,"Should not have received RAR on secondary CCs! \n");
return(0xffff);
}
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,
*(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
rarh->RAPID,preamble_index);
#ifdef DEBUG_RAR
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);
LOG_I(MAC,"[UE %d][RAPROC] rar->Timing_Advance_Command %d\n",module_idP,(((uint16_t)(rar[0]&0x7f))<<4) + (rar[1]>>4));
// 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);
LOG_I(MAC,"[UE %d][RAPROC] rar->t_crnti %x\n",module_idP,(uint16_t)rar[5]+(rar[4]<<8));
#endif
if (preamble_index == rarh->RAPID) {
*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);
}
}
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