/* * 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 1.0 (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 "defs.h" #include "proto.h" #include "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,26,1); // 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_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", 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].frame, 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, 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 ) //------------------------------------------------------------------------------ { uint16_t ret = 0; // return value 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); // get the last RAR payload for working with CMW500 uint8_t n_rarpy = 0; // number of RAR payloads uint8_t n_rarh = 0; // number of MAC RAR subheaders uint8_t best_rx_rapid = -1; // the closest RAPID receive from all RARs while (1) { n_rarh++; if (rarh->T == 1) { n_rarpy++; LOG_D(MAC, "RAPID %d\n", rarh->RAPID); } if (rarh->RAPID == preamble_index) { LOG_D(PHY, "Found RAR with the intended RAPID %d\n", rarh->RAPID); rar = (uint8_t *)(dlsch_buffer+n_rarh + (n_rarpy-1)*6); break; } if (abs((int)rarh->RAPID - (int)preamble_index) < abs((int)best_rx_rapid - (int)preamble_index)) { best_rx_rapid = rarh->RAPID; rar = (uint8_t *)(dlsch_buffer+n_rarh + (n_rarpy-1)*6); } if (rarh->E == 0) { #if DISABLE_LOG_X printf("PHY,No RAR found with the intended RAPID. The closest RAPID in all RARs is %d\n", best_rx_rapid); #else LOG_I(PHY, "No RAR found with the intended RAPID. The closest RAPID in all RARs is %d\n", best_rx_rapid); #endif break; } else { rarh++; } }; LOG_D(MAC, "number of RAR subheader %d; number of RAR pyloads %d\n", n_rarh, n_rarpy); 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_D(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_D(MAC,"[UE %d][RAPROC] rar->t_crnti %x\n",module_idP,(uint16_t)rar[5]+(rar[4]<<8)); #endif if (opt_enabled) { LOG_D(OPT,"[UE %d][RAPROC] CC_id %d RAR Frame %d trace pdu for ra-RNTI %x\n", module_idP, CC_id, frameP, ra_rnti); trace_pdu(1, (uint8_t*)dlsch_buffer, n_rarh + n_rarpy*6, module_idP, 2, ra_rnti, UE_mac_inst[module_idP].rxFrame, UE_mac_inst[module_idP].rxSubframe, 0, 0); } 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); ret = ((((uint16_t)(rar[0]&0x7f))<<4) + (rar[1]>>4)); } else { UE_mac_inst[module_idP].crnti=0; ret = (0xffff); } // move the selected RAR to the front of the RA_PDSCH buffer memcpy(selected_rar_buffer+0, (uint8_t*)rarh, 1); memcpy(selected_rar_buffer+1, (uint8_t*)rar , 6); return ret; }