317 lines
12 KiB
C
Executable File
317 lines
12 KiB
C
Executable File
/*
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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 1.0 (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 fill_rar(
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const module_id_t module_idP,
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const int CC_id,
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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,
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const uint8_t input_buffer_length
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)
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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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// RAR_PDU *rar = (RAR_PDU *)(dlsch_buffer+1);
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uint8_t *rar = (uint8_t *)(dlsch_buffer+1);
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int i,ra_idx = -1;
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uint16_t rballoc;
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uint8_t mcs,TPC,ULdelay,cqireq;
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AssertFatal(CC_id < MAX_NUM_CCs, "CC_id %u < MAX_NUM_CCs %u", CC_id, MAX_NUM_CCs);
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for (i=0; i<NB_RA_PROC_MAX; i++) {
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if (RC.mac[module_idP]->common_channels[CC_id].RA_template[i].generate_rar == 1) {
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ra_idx=i;
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RC.mac[module_idP]->common_channels[CC_id].RA_template[i].generate_rar = 0;
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break;
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}
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}
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//DevAssert( ra_idx != -1 );
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if (ra_idx==-1)
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return(0);
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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 = RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].preamble_index; // Respond to Preamble 0 only for the moment
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/*
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rar->R = 0;
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rar->Timing_Advance_Command = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset/4;
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rar->hopping_flag = 0;
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rar->rb_alloc = mac_xface->computeRIV(N_RB_UL,12,2); // 2 RB
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rar->mcs = 2; // mcs 2
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rar->TPC = 4; // 2 dB power adjustment
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rar->UL_delay = 0;
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rar->cqi_req = 1;
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rar->t_crnti = eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].rnti;
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*/
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rar[4] = (uint8_t)(RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].rnti>>8);
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rar[5] = (uint8_t)(RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].rnti&0xff);
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//RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].timing_offset = 0;
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RC.mac[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
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rar[0] = (uint8_t)(RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4
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rar[1] = (uint8_t)(RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4
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rballoc = mac_computeRIV(N_RB_UL,1,1); // 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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mcs = 10;
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TPC = 3;
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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] = (((mcs&0x7)<<5)) | ((TPC&7)<<2) | ((ULdelay&1)<<1) | (cqireq&1);
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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",
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module_idP, CC_id,
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frameP,
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*(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
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ra_idx,
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RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].rnti,
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rarh->RAPID,RC.mac[module_idP]->common_channels[CC_id].RA_template[0].preamble_index,
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RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].timing_offset);
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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, 0, 0);
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LOG_D(OPT,"[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, RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].rnti,
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rarh->RAPID, input_buffer_length);
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}
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return(RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx].rnti);
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}
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#ifdef Rel14
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//------------------------------------------------------------------------------
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unsigned short fill_rar_br(eNB_MAC_INST *eNB,
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int CC_id,
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RA_TEMPLATE *RA_template,
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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,
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const uint8_t ce_level
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)
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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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int i;
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uint8_t nb,rballoc,reps;
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uint8_t mcs,TPC,ULdelay,cqireq;
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int input_buffer_length;
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AssertFatal(RA_template != 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_template->preamble_index; // Respond to Preamble 0 only for the moment
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RA_template->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_template->timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4
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rar[1] = (uint8_t)(RA_template->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_template->msg34_narrowband = RA_template->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_template->rnti>>8);
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rar[5] = (uint8_t)(RA_template->rnti&0xff);
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//cc->RA_template[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] = (((mcs&0x7)<<5)) | ((TPC&7)<<2) | ((ULdelay&1)<<1) | (cqireq&1);
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}
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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_template->rnti>>8);
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rar[4] = (uint8_t)(RA_template->rnti&0xff);
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}
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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",
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frameP,
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*(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
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ce_level,
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RA_template->rnti,
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rarh->RAPID,RA_template->preamble_index,
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RA_template->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,"[RAPROC] RAR Frame %d trace pdu for rnti %x and rapid %d size %d\n",
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frameP, RA_template->rnti,
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rarh->RAPID, input_buffer_length);
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}
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return(RA_template->rnti);
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}
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#endif
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//------------------------------------------------------------------------------
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uint16_t
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ue_process_rar(
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const module_id_t module_idP,
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const int CC_id,
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const frame_t frameP,
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const rnti_t ra_rnti,
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uint8_t* const dlsch_buffer,
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rnti_t* const t_crnti,
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const uint8_t preamble_index,
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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", 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) < 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, "No RAR found with the intended RAPID. The closest RAPID in all RARs is %d\n", 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", 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,"[eNB %d][RAPROC] Frame %d Received RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for preamble %d/%d\n",module_idP,frameP,
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*(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5],
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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,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",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,(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,"[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, module_idP, 2, ra_rnti,
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UE_mac_inst[module_idP].rxFrame, 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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