/* * 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 "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, 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 if(N_RB_UL == 25){ ra->msg3_first_rb = 1; }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; 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(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->rnti, rarh->RAPID, input_buffer_length); } return (ra->rnti); } #ifdef Rel14 //------------------------------------------------------------------------------ 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(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->rnti, rarh->RAPID, input_buffer_length); } return (ra->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; }