296 lines
11 KiB
C
296 lines
11 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file rar_tools.c
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* \brief random access tools
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* \author Raymond Knopp and navid nikaein
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* \date 2011 - 2014
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* \version 1.0
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* @ingroup _mac
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*/
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#include "defs.h"
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#include "proto.h"
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#include "extern.h"
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#include "SIMULATION/TOOLS/defs.h"
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#include "UTIL/LOG/log.h"
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#include "OCG.h"
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#include "OCG_extern.h"
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#include "UTIL/OPT/opt.h"
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#include "common/ran_context.h"
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#define DEBUG_RAR
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extern unsigned int localRIV2alloc_LUT25[512];
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extern unsigned int distRIV2alloc_LUT25[512];
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extern unsigned short RIV2nb_rb_LUT25[512];
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extern unsigned short RIV2first_rb_LUT25[512];
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extern RAN_CONTEXT_t RC;
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//------------------------------------------------------------------------------
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unsigned short
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fill_rar(const module_id_t module_idP,
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const int CC_id,
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RA_t * ra,
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const frame_t frameP,
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uint8_t * const dlsch_buffer,
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const uint16_t N_RB_UL, const uint8_t input_buffer_length)
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//------------------------------------------------------------------------------
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{
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RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *) dlsch_buffer;
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uint8_t *rar = (uint8_t *) (dlsch_buffer + 1);
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// subheader fixed
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rarh->E = 0; // First and last RAR
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rarh->T = 1; // 0 for E/T/R/R/BI subheader, 1 for E/T/RAPID subheader
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rarh->RAPID = ra->preamble_index; // Respond to Preamble 0 only for the moment
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rar[4] = (uint8_t) (ra->rnti >> 8);
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rar[5] = (uint8_t) (ra->rnti & 0xff);
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//ra->timing_offset = 0;
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ra->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
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rar[0] = (uint8_t) (ra->timing_offset >> (2 + 4)); // 7 MSBs of timing advance + divide by 4
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rar[1] = (uint8_t) (ra->timing_offset << (4 - 2)) & 0xf0; // 4 LSBs of timing advance + divide by 4
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COMMON_channels_t *cc = &RC.mac[module_idP]->common_channels[CC_id];
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if(N_RB_UL == 25){
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ra->msg3_first_rb = 1;
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}else{
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if (cc->tdd_Config && N_RB_UL == 100) {
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ra->msg3_first_rb = 3;
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} else {
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ra->msg3_first_rb = 2;
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}
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}
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ra->msg3_nb_rb = 1;
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uint16_t rballoc = mac_computeRIV(N_RB_UL, ra->msg3_first_rb, ra->msg3_nb_rb); // first PRB only for UL Grant
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rar[1] |= (rballoc >> 7) & 7; // Hopping = 0 (bit 3), 3 MSBs of rballoc
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rar[2] = ((uint8_t) (rballoc & 0xff)) << 1; // 7 LSBs of rballoc
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ra->msg3_mcs = 10;
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ra->msg3_TPC = 3;
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ra->msg3_ULdelay = 0;
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ra->msg3_cqireq = 0;
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ra->msg3_round = 0;
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rar[2] |= ((ra->msg3_mcs & 0x8) >> 3); // mcs 10
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rar[3] =
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(((ra->msg3_mcs & 0x7) << 5)) | ((ra->msg3_TPC & 7) << 2) |
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((ra->msg3_ULdelay & 1) << 1) | (ra->msg3_cqireq & 1);
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if (opt_enabled) {
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trace_pdu(1, dlsch_buffer, input_buffer_length, module_idP, 2, 1,
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RC.mac[module_idP]->frame, RC.mac[module_idP]->subframe,
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0, 0);
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LOG_D(OPT,
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"[eNB %d][RAPROC] CC_id %d RAR Frame %d trace pdu for rnti %x and rapid %d size %d\n",
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module_idP, CC_id, frameP, ra->rnti, rarh->RAPID,
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input_buffer_length);
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}
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return (ra->rnti);
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}
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#ifdef Rel14
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//------------------------------------------------------------------------------
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unsigned short
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fill_rar_br(eNB_MAC_INST * eNB,
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int CC_id,
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RA_t * ra,
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const frame_t frameP,
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const sub_frame_t subframeP,
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uint8_t * const dlsch_buffer, const uint8_t ce_level)
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//------------------------------------------------------------------------------
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{
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RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *) dlsch_buffer;
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COMMON_channels_t *cc = &eNB->common_channels[CC_id];
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uint8_t *rar = (uint8_t *) (dlsch_buffer + 1);
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// uint8_t nb,reps;
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uint8_t rballoc;
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uint8_t mcs, TPC, ULdelay, cqireq;
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int input_buffer_length;
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AssertFatal(ra != NULL, "RA is null \n");
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// subheader fixed
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rarh->E = 0; // First and last RAR
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rarh->T = 1; // 0 for E/T/R/R/BI subheader, 1 for E/T/RAPID subheader
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rarh->RAPID = ra->preamble_index; // Respond to Preamble 0 only for the moment
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ra->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps
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rar[0] = (uint8_t) (ra->timing_offset >> (2 + 4)); // 7 MSBs of timing advance + divide by 4
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rar[1] = (uint8_t) (ra->timing_offset << (4 - 2)) & 0xf0; // 4 LSBs of timing advance + divide by 4
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int N_NB_index;
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AssertFatal(1 == 0, "RAR for BL/CE Still to be finished ...\n");
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// Copy the Msg2 narrowband
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ra->msg34_narrowband = ra->msg2_narrowband;
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if (ce_level < 2) { //CE Level 0,1, CEmodeA
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input_buffer_length = 6;
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N_NB_index = get_numnarrowbandbits(cc->mib->message.dl_Bandwidth);
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rar[4] = (uint8_t) (ra->rnti >> 8);
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rar[5] = (uint8_t) (ra->rnti & 0xff);
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//cc->ra[ra_idx].timing_offset = 0;
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// nb = 0;
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rballoc = mac_computeRIV(6, 1 + ce_level, 1); // one PRB only for UL Grant in position 1+ce_level within Narrowband
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rar[1] |= (rballoc & 15) << (4 - N_NB_index); // Hopping = 0 (bit 3), 3 MSBs of rballoc
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// reps = 4;
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mcs = 7;
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TPC = 3; // no power increase
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ULdelay = 0;
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cqireq = 0;
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rar[2] |= ((mcs & 0x8) >> 3); // mcs 10
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rar[3] =
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(((mcs & 0x7) << 5)) | ((TPC & 7) << 2) | ((ULdelay & 1) << 1)
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| (cqireq & 1);
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} else { // CE level 2,3 => CEModeB
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input_buffer_length = 5;
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rar[3] = (uint8_t) (ra->rnti >> 8);
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rar[4] = (uint8_t) (ra->rnti & 0xff);
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}
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LOG_D(MAC,
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"[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",
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frameP, *(uint8_t *) rarh, rar[0], rar[1], rar[2], rar[3],
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rar[4], rar[5], ce_level, ra->rnti, rarh->RAPID,
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ra->preamble_index, ra->timing_offset);
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if (opt_enabled) {
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trace_pdu(1, dlsch_buffer, input_buffer_length, eNB->Mod_id, 2, 1,
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eNB->frame, eNB->subframe, 0, 0);
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LOG_D(OPT,
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"[RAPROC] RAR Frame %d trace pdu for rnti %x and rapid %d size %d\n",
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frameP, ra->rnti, rarh->RAPID, input_buffer_length);
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}
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return (ra->rnti);
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}
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#endif
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//------------------------------------------------------------------------------
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uint16_t ue_process_rar(const module_id_t module_idP, const int CC_id, const frame_t frameP, const rnti_t ra_rnti, uint8_t * const dlsch_buffer, rnti_t * const t_crnti, const uint8_t preamble_index, uint8_t * selected_rar_buffer // output argument for storing the selected RAR header and RAR payload
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)
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//------------------------------------------------------------------------------
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{
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uint16_t ret = 0; // return value
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RA_HEADER_RAPID *rarh = (RA_HEADER_RAPID *) dlsch_buffer;
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// RAR_PDU *rar = (RAR_PDU *)(dlsch_buffer+1);
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uint8_t *rar = (uint8_t *) (dlsch_buffer + 1);
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// get the last RAR payload for working with CMW500
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uint8_t n_rarpy = 0; // number of RAR payloads
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uint8_t n_rarh = 0; // number of MAC RAR subheaders
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uint8_t best_rx_rapid = -1; // the closest RAPID receive from all RARs
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while (1) {
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n_rarh++;
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if (rarh->T == 1) {
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n_rarpy++;
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LOG_D(MAC, "RAPID %d\n", rarh->RAPID);
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}
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if (rarh->RAPID == preamble_index) {
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LOG_D(PHY, "Found RAR with the intended RAPID %d\n",
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rarh->RAPID);
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rar = (uint8_t *) (dlsch_buffer + n_rarh + (n_rarpy - 1) * 6);
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break;
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}
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if (abs((int) rarh->RAPID - (int) preamble_index) <
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abs((int) best_rx_rapid - (int) preamble_index)) {
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best_rx_rapid = rarh->RAPID;
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rar = (uint8_t *) (dlsch_buffer + n_rarh + (n_rarpy - 1) * 6);
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}
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if (rarh->E == 0) {
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LOG_I(PHY,
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"No RAR found with the intended RAPID. The closest RAPID in all RARs is %d\n",
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best_rx_rapid);
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break;
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} else {
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rarh++;
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}
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};
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LOG_D(MAC, "number of RAR subheader %d; number of RAR pyloads %d\n",
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n_rarh, n_rarpy);
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if (CC_id > 0) {
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LOG_W(MAC, "Should not have received RAR on secondary CCs! \n");
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return (0xffff);
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}
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LOG_I(MAC,
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"[eNB %d][RAPROC] Frame %d Received RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for preamble %d/%d\n",
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module_idP, frameP, *(uint8_t *) rarh, rar[0], rar[1], rar[2],
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rar[3], rar[4], rar[5], rarh->RAPID, preamble_index);
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#ifdef DEBUG_RAR
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LOG_D(MAC, "[UE %d][RAPROC] rarh->E %d\n", module_idP, rarh->E);
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LOG_D(MAC, "[UE %d][RAPROC] rarh->T %d\n", module_idP, rarh->T);
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LOG_D(MAC, "[UE %d][RAPROC] rarh->RAPID %d\n", module_idP,
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rarh->RAPID);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->R %d\n",module_idP,rar->R);
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LOG_D(MAC, "[UE %d][RAPROC] rar->Timing_Advance_Command %d\n",
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module_idP, (((uint16_t) (rar[0] & 0x7f)) << 4) + (rar[1] >> 4));
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// LOG_I(MAC,"[UE %d][RAPROC] rar->hopping_flag %d\n",module_idP,rar->hopping_flag);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->rb_alloc %d\n",module_idP,rar->rb_alloc);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->mcs %d\n",module_idP,rar->mcs);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->TPC %d\n",module_idP,rar->TPC);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->UL_delay %d\n",module_idP,rar->UL_delay);
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// LOG_I(MAC,"[UE %d][RAPROC] rar->cqi_req %d\n",module_idP,rar->cqi_req);
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LOG_D(MAC, "[UE %d][RAPROC] rar->t_crnti %x\n", module_idP,
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(uint16_t) rar[5] + (rar[4] << 8));
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#endif
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if (opt_enabled) {
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LOG_D(OPT,
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"[UE %d][RAPROC] CC_id %d RAR Frame %d trace pdu for ra-RNTI %x\n",
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module_idP, CC_id, frameP, ra_rnti);
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trace_pdu(1, (uint8_t *) dlsch_buffer, n_rarh + n_rarpy * 6,
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module_idP, 2, ra_rnti, UE_mac_inst[module_idP].rxFrame,
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UE_mac_inst[module_idP].rxSubframe, 0, 0);
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}
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if (preamble_index == rarh->RAPID) {
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*t_crnti = (uint16_t) rar[5] + (rar[4] << 8); //rar->t_crnti;
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UE_mac_inst[module_idP].crnti = *t_crnti; //rar->t_crnti;
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//return(rar->Timing_Advance_Command);
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ret = ((((uint16_t) (rar[0] & 0x7f)) << 4) + (rar[1] >> 4));
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} else {
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UE_mac_inst[module_idP].crnti = 0;
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ret = (0xffff);
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}
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// move the selected RAR to the front of the RA_PDSCH buffer
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memcpy(selected_rar_buffer + 0, (uint8_t *) rarh, 1);
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memcpy(selected_rar_buffer + 1, (uint8_t *) rar, 6);
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return ret;
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}
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