/* * 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" #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, 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; RA_TEMPLATE *RA_template; AssertFatal(CC_id < MAX_NUM_CCs, "CC_id %u < MAX_NUM_CCs %u", CC_id, MAX_NUM_CCs); for (i=0; icommon_channels[CC_id].RA_template[i].generate_rar == 1) { ra_idx=i; RC.mac[module_idP]->common_channels[CC_id].RA_template[i].generate_rar = 0; break; } } RA_template = &RC.mac[module_idP]->common_channels[CC_id].RA_template[ra_idx]; //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 = RA_template->preamble_index; // Respond to Preamble 0 only for the moment rar[4] = (uint8_t)(RA_template->rnti>>8); rar[5] = (uint8_t)(RA_template->rnti&0xff); //RA_template->timing_offset = 0; RA_template->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps rar[0] = (uint8_t)(RA_template->timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4 rar[1] = (uint8_t)(RA_template->timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4 RA_template->msg3_first_rb=1; RA_template->msg3_nb_rb=1; uint16_t rballoc = mac_computeRIV(N_RB_UL,RA_template->msg3_first_rb,RA_template->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_template->msg3_mcs = 10; RA_template->msg3_TPC = 3; RA_template->msg3_ULdelay = 0; RA_template->msg3_cqireq = 0; rar[2] |= ((RA_template->msg3_mcs&0x8)>>3); // mcs 10 rar[3] = (((RA_template->msg3_mcs&0x7)<<5)) | ((RA_template->msg3_TPC&7)<<2) | ((RA_template->msg3_ULdelay&1)<<1) | (RA_template->msg3_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, RA_template->rnti, rarh->RAPID,RC.mac[module_idP]->common_channels[CC_id].RA_template[0].preamble_index, RA_template->timing_offset); if (opt_enabled) { trace_pdu(1, dlsch_buffer, input_buffer_length, module_idP, 2, 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_template->rnti, rarh->RAPID, input_buffer_length); } return(RA_template->rnti); } #ifdef Rel14 //------------------------------------------------------------------------------ unsigned short fill_rar_br(eNB_MAC_INST *eNB, int CC_id, RA_TEMPLATE *RA_template, 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); int i; uint8_t nb,rballoc,reps; uint8_t mcs,TPC,ULdelay,cqireq,mpdcch_nb_index; int input_buffer_length; AssertFatal(RA_template != 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_template->preamble_index; // Respond to Preamble 0 only for the moment RA_template->timing_offset /= 16; //T_A = N_TA/16, where N_TA should be on a 30.72Msps rar[0] = (uint8_t)(RA_template->timing_offset>>(2+4)); // 7 MSBs of timing advance + divide by 4 rar[1] = (uint8_t)(RA_template->timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4 int N_NB_index; // Copy the Msg2 narrowband RA_template->msg34_narrowband = RA_template->msg2_narrowband; RA_template->msg3_first_rb = ce_level; RA_template->msg3_nb_rb = 2; 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_template->rnti>>8); rar[5] = (uint8_t)(RA_template->rnti&0xff); //cc->RA_template[ra_idx].timing_offset = 0; nb = 0; reps = 0; mcs = 7; TPC = 3; // no power increase ULdelay = 0; cqireq = 0; mpdcch_nb_index = 0; rballoc = mac_computeRIV(6,RA_template->msg3_first_rb,RA_template->msg3_nb_rb); // one PRB only for UL Grant in position 1+ce_level within Narrowband unsigned int buffer = 0; buffer |= N_NB_index << (16 + (4 - N_NB_index)); buffer |= ((rballoc & 0xFF) << (12 + (4 - N_NB_index))); buffer |= ((reps & 0x03) << (10 + (4 - N_NB_index))); buffer |= ((mcs & 0x07) << (7 + (4 - N_NB_index))); buffer |= ((TPC & 0x07) << (4 + (4 - N_NB_index))); buffer |= ((cqireq & 0x01) << (3 + (4 - N_NB_index))); buffer |= ((ULdelay & 0x01) << (2 + (4 - N_NB_index))); buffer |= ((ULdelay & 0x01) << (4 - N_NB_index)); rar[1] = (buffer>>12) & 0x0F; rar[2] = (buffer>>8) & 0xFF; rar[3] = buffer&0xFF; } else { // CE level 2,3 => CEModeB input_buffer_length =5; rar[3] = (uint8_t)(RA_template->rnti>>8); rar[4] = (uint8_t)(RA_template->rnti&0xff); } LOG_I(MAC,"[RAPROC] Frame %d Subframe %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,subframeP, *(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5], ce_level, RA_template->rnti, rarh->RAPID,RA_template->preamble_index, RA_template->timing_offset); if (opt_enabled) { trace_pdu(1, dlsch_buffer, input_buffer_length, eNB->Mod_id, 2, 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_template->rnti, rarh->RAPID, input_buffer_length); } return(RA_template->rnti); } #endif //------------------------------------------------------------------------------ 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) { LOG_I(PHY, "No RAR found with the intended RAPID. The closest RAPID in all RARs is %d\n", best_rx_rapid); 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; }