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/*
* 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 1.1 (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
*/
/*! \file rar_tools.c
* \brief random access tools
* \author Raymond Knopp and navid nikaein
* \date 2011 - 2014
* \version 1.0
* @ingroup _mac
*/
#include "mac.h"
#include "mac_proto.h"
#include "mac_extern.h"
#include "SIMULATION/TOOLS/sim.h"
#include "common/utils/LOG/log.h"
#include "OCG.h"
#include "OCG_extern.h"
#include "UTIL/OPT/opt.h"
#include "common/ran_context.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];
extern RAN_CONTEXT_t RC;
//------------------------------------------------------------------------------
unsigned short
fill_rar(const module_id_t module_idP,
const int CC_id,
RA_t * ra,
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);
// 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 = ra->preamble_index; // Respond to Preamble 0 only for the moment
rar[4] = (uint8_t) (ra->rnti >> 8);
rar[5] = (uint8_t) (ra->rnti & 0xff);
//ra->timing_offset = 0;
ra->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
rar[0] = (uint8_t) (ra->timing_offset >> (2 + 4)); // 7 MSBs of timing advance + divide by 4
rar[1] = (uint8_t) (ra->timing_offset << (4 - 2)) & 0xf0; // 4 LSBs of timing advance + divide by 4
COMMON_channels_t *cc = &RC.mac[module_idP]->common_channels[CC_id];
if(N_RB_UL == 25){
ra->msg3_first_rb = 1;
}else{
if (cc->tdd_Config && N_RB_UL == 100) {
ra->msg3_first_rb = 3;
} else {
ra->msg3_first_rb = 2;
}
}
ra->msg3_nb_rb = 1;
uint16_t rballoc = mac_computeRIV(N_RB_UL, ra->msg3_first_rb, ra->msg3_nb_rb); // 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
ra->msg3_mcs = 10;
ra->msg3_TPC = 3;
ra->msg3_ULdelay = 0;
ra->msg3_cqireq = 0;
ra->msg3_round = 0;
rar[2] |= ((ra->msg3_mcs & 0x8) >> 3); // mcs 10
rar[3] =
(((ra->msg3_mcs & 0x7) << 5)) | ((ra->msg3_TPC & 7) << 2) |
((ra->msg3_ULdelay & 1) << 1) | (ra->msg3_cqireq & 1);
if (opt_enabled) {
trace_pdu(DIRECTION_DOWNLINK , dlsch_buffer, input_buffer_length, module_idP, WS_RA_RNTI , 1,
RC.mac[module_idP]->frame, RC.mac[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, ra->rnti, rarh->RAPID,
input_buffer_length);
}
return (ra->rnti);
}
#if (RRC_VERSION >= MAKE_VERSION(14, 0, 0))
//------------------------------------------------------------------------------
unsigned short
fill_rar_br(eNB_MAC_INST * eNB,
int CC_id,
RA_t * ra,
const frame_t frameP,
const sub_frame_t subframeP,
uint8_t * const dlsch_buffer, const uint8_t ce_level)
//------------------------------------------------------------------------------
{
RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *) dlsch_buffer;
COMMON_channels_t *cc = &eNB->common_channels[CC_id];
uint8_t *rar = (uint8_t *) (dlsch_buffer + 1);
// uint8_t nb,reps;
uint8_t rballoc;
uint8_t mcs, TPC, ULdelay, cqireq;
int input_buffer_length;
AssertFatal(ra != NULL, "RA is null \n");
// 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 = ra->preamble_index; // Respond to Preamble 0 only for the moment
ra->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
rar[0] = (uint8_t) (ra->timing_offset >> (2 + 4)); // 7 MSBs of timing advance + divide by 4
rar[1] = (uint8_t) (ra->timing_offset << (4 - 2)) & 0xf0; // 4 LSBs of timing advance + divide by 4
int N_NB_index;
AssertFatal(1 == 0, "RAR for BL/CE Still to be finished ...\n");
// Copy the Msg2 narrowband
ra->msg34_narrowband = ra->msg2_narrowband;
if (ce_level < 2) { //CE Level 0,1, CEmodeA
input_buffer_length = 6;
N_NB_index = get_numnarrowbandbits(cc->mib->message.dl_Bandwidth);
rar[4] = (uint8_t) (ra->rnti >> 8);
rar[5] = (uint8_t) (ra->rnti & 0xff);
//cc->ra[ra_idx].timing_offset = 0;
// nb = 0;
rballoc = mac_computeRIV(6, 1 + ce_level, 1); // one PRB only for UL Grant in position 1+ce_level within Narrowband
rar[1] |= (rballoc & 15) << (4 - N_NB_index); // Hopping = 0 (bit 3), 3 MSBs of rballoc
// reps = 4;
mcs = 7;
TPC = 3; // no power increase
ULdelay = 0;
cqireq = 0;
rar[2] |= ((mcs & 0x8) >> 3); // mcs 10
rar[3] =
(((mcs & 0x7) << 5)) | ((TPC & 7) << 2) | ((ULdelay & 1) << 1)
| (cqireq & 1);
} else { // CE level 2,3 => CEModeB
input_buffer_length = 5;
rar[3] = (uint8_t) (ra->rnti >> 8);
rar[4] = (uint8_t) (ra->rnti & 0xff);
}
LOG_D(MAC,
"[RAPROC] Frame %d Generating RAR BR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for ce_level %d, CRNTI %x,preamble %d/%d,TIMING OFFSET %d\n",
frameP, *(uint8_t *) rarh, rar[0], rar[1], rar[2], rar[3],
rar[4], rar[5], ce_level, ra->rnti, rarh->RAPID,
ra->preamble_index, ra->timing_offset);
if (opt_enabled) {
trace_pdu(DIRECTION_DOWNLINK , dlsch_buffer, input_buffer_length, eNB->Mod_id, WS_RA_RNTI , 1,
eNB->frame, eNB->subframe, 0, 0);
LOG_D(OPT,
"[RAPROC] RAR Frame %d trace pdu for rnti %x and rapid %d size %d\n",
frameP, ra->rnti, rarh->RAPID, input_buffer_length);
}
return (ra->rnti);
}
#endif