/******************************************************************************* Eurecom OpenAirInterface Copyright(c) 1999 - 2010 Eurecom This program is free software; you can redistribute it and/or modify it under the terms and conditions of the GNU General Public License, version 2, as published by the Free Software Foundation. This program is distributed in the hope it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. The full GNU General Public License is included in this distribution in the file called "COPYING". Contact Information Openair Admin: openair_admin@eurecom.fr Openair Tech : openair_tech@eurecom.fr Forums : http://forums.eurecom.fsr/openairinterface Address : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France *******************************************************************************/ /*! \file rar_tools.c * \brief random access tools * \author Raymond Knopp * \date 2011 * \version 0.5 * @ingroup _mac */ #include "defs.h" #include "extern.h" #include "MAC_INTERFACE/defs.h" #include "MAC_INTERFACE/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]; extern inline unsigned int taus(void); unsigned short fill_rar(module_id_t module_idP, frame_t frameP, u8 *dlsch_buffer, u16 N_RB_UL, u8 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; for (i=0;iE = 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].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].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].RA_template[ra_idx].rnti; */ rar[4] = (uint8_t)(eNB_mac_inst[module_idP].RA_template[ra_idx].rnti>>8); rar[5] = (uint8_t)(eNB_mac_inst[module_idP].RA_template[ra_idx].rnti&0xff); eNB_mac_inst[module_idP].RA_template[ra_idx].timing_offset = 0; //eNB_mac_inst[module_idP].RA_template[ra_idx].timing_offset /= 16; rar[0] = (uint8_t)(eNB_mac_inst[module_idP].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].RA_template[ra_idx].timing_offset<<(4-2))&0xf0; // 4 LSBs of timing advance + divide by 4 rballoc = mac_xface->computeRIV(N_RB_UL,1,1); // 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_I(MAC,"[eNB %d][RAPROC] 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,frame, *(uint8_t*)rarh,rar[0],rar[1],rar[2],rar[3],rar[4],rar[5], ra_idx, eNB_mac_inst[module_idP].RA_template[ra_idx].rnti, rarh->RAPID,eNB_mac_inst[module_idP].RA_template[0].preamble_index, eNB_mac_inst[module_idP].RA_template[ra_idx].timing_offset); #if defined(USER_MODE) && defined(OAI_EMU) if (oai_emulation.info.opt_enabled){ trace_pdu(1, dlsch_buffer, input_buffer_length, module_idP, 2, 1, eNB_mac_inst[module_idP].subframe, 0, 0); LOG_I(OPT,"[eNB %d][RAPROC] RAR Frame %d trace pdu for rnti %x and rapid %d size %d\n", module_idP, frame, eNB_mac_inst[module_idP].RA_template[ra_idx].rnti, rarh->RAPID, input_buffer_length); } #endif return(eNB_mac_inst[module_idP].RA_template[ra_idx].rnti); } uint16_t ue_process_rar(module_id_t module_idP, frame_t frameP, u8 *dlsch_buffer,rnti_t *t_crnti,u8 preamble_index) { 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); LOG_I(MAC,"[eNB %d][RAPROC] Frame %d Received RAR (%02x|%02x.%02x.%02x.%02x.%02x.%02x) for preamble %d/%d\n",module_idP,frame, *(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_I(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_I(MAC,"[UE %d][RAPROC] rar->t_crnti %x\n",module_idP,(uint16_t)rar[5]+(rar[4]<<8)); #endif 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); return((((uint16_t)(rar[0]&0x7f))<<4) + (rar[1]>>4)); } else { UE_mac_inst[module_idP].crnti=0; return(0xffff); } }