/* * 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 ru_procedures.c * \brief Implementation of RU procedures * \author R. Knopp, F. Kaltenberger, N. Nikaein, X. Foukas * \date 2011 * \version 0.1 * \company Eurecom * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,navid.nikaein@eurecom.fr, x.foukas@sms.ed.ac.uk * \note * \warning */ #include "PHY/defs_eNB.h" #include "PHY/phy_extern.h" #include "SCHED/sched_eNB.h" #include "PHY/MODULATION/modulation_eNB.h" #include "PHY/LTE_TRANSPORT/if4_tools.h" #include "PHY/LTE_TRANSPORT/if5_tools.h" #include "PHY/LTE_TRANSPORT/transport_common_proto.h" #include "LAYER2/MAC/mac.h" #include "common/utils/LOG/log.h" #include "common/utils/LOG/vcd_signal_dumper.h" #include "assertions.h" #include "msc.h" #include <time.h> #include "targets/RT/USER/rt_wrapper.h" extern int oai_exit; void feptx0(RU_t *ru,int slot) { LTE_DL_FRAME_PARMS *fp = &ru->frame_parms; //int dummy_tx_b[7680*2] __attribute__((aligned(32))); unsigned int aa,slot_offset; int slot_sizeF = (fp->ofdm_symbol_size)* ((fp->Ncp==1) ? 6 : 7); int subframe = ru->proc.subframe_tx; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM+slot , 1 ); slot_offset = subframe*fp->samples_per_tti + (slot*(fp->samples_per_tti>>1)); //LOG_D(PHY,"SFN/SF:RU:TX:%d/%d Generating slot %d\n",ru->proc.frame_tx, ru->proc.subframe_tx,slot); for (aa=0; aa<ru->nb_tx; aa++) { if (fp->Ncp == EXTENDED) PHY_ofdm_mod(&ru->common.txdataF_BF[aa][slot*slot_sizeF], (int*)&ru->common.txdata[aa][slot_offset], fp->ofdm_symbol_size, 6, fp->nb_prefix_samples, CYCLIC_PREFIX); else normal_prefix_mod(&ru->common.txdataF_BF[aa][slot*slot_sizeF], (int*)&ru->common.txdata[aa][slot_offset], 7, fp); /* len = fp->samples_per_tti>>1; if ((slot_offset+len)>(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti)) { tx_offset = (int)slot_offset; txdata = (int16_t*)&ru->common.txdata[aa][tx_offset]; len2 = -tx_offset+LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; for (i=0; i<(len2<<1); i++) { txdata[i] = ((int16_t*)dummy_tx_b)[i]; } txdata = (int16_t*)&ru->common.txdata[aa][0]; for (j=0; i<(len<<1); i++,j++) { txdata[j++] = ((int16_t*)dummy_tx_b)[i]; } } else { tx_offset = (int)slot_offset; txdata = (int16_t*)&ru->common.txdata[aa][tx_offset]; memcpy((void*)txdata,(void*)dummy_tx_b,len<<2); } */ // TDD: turn on tx switch N_TA_offset before by setting buffer in these samples to 0 /* if ((slot == 0) && (fp->frame_type == TDD) && ((fp->tdd_config==0) || (fp->tdd_config==1) || (fp->tdd_config==2) || (fp->tdd_config==6)) && ((subframe==0) || (subframe==5))) { for (i=0; i<ru->N_TA_offset; i++) { tx_offset = (int)slot_offset+i-ru->N_TA_offset/2; if (tx_offset<0) tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti)) tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; ru->common.txdata[aa][tx_offset] = 0x00000000; } }*/ } VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM+slot , 0); } static void *feptx_thread(void *param) { RU_t *ru = (RU_t *)param; RU_proc_t *proc = &ru->proc; cpu_set_t cpuset; CPU_ZERO(&cpuset); thread_top_init("feptx_thread",1,85000,120000,500000); pthread_setname_np( pthread_self(),"feptx processing"); LOG_I(PHY,"thread feptx created id=%ld\n", syscall(__NR_gettid)); //CPU_SET(6, &cpuset); //pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset); //wait_sync("feptx_thread"); while (!oai_exit) { if (wait_on_condition(&proc->mutex_feptx,&proc->cond_feptx,&proc->instance_cnt_feptx,"feptx thread")<0) break; if (oai_exit) break; //stop_meas(&ru->ofdm_mod_wakeup_stats); feptx0(ru,1); if (release_thread(&proc->mutex_feptx,&proc->instance_cnt_feptx,"feptx thread")<0) break; if (pthread_cond_signal(&proc->cond_feptx) != 0) { printf("[eNB] ERROR pthread_cond_signal for feptx thread exit\n"); exit_fun( "ERROR pthread_cond_signal" ); return NULL; } /*if(opp_enabled == 1 && ru->ofdm_mod_wakeup_stats.p_time>30*3000){ print_meas_now(&ru->ofdm_mod_wakeup_stats,"fep wakeup",stderr); printf("delay in fep wakeup in frame_tx: %d subframe_rx: %d \n",proc->frame_tx,proc->subframe_tx); }*/ } return(NULL); } void feptx_ofdm_2thread(RU_t *ru) { LTE_DL_FRAME_PARMS *fp=&ru->frame_parms; RU_proc_t *proc = &ru->proc; struct timespec wait; int subframe = ru->proc.subframe_tx; wait.tv_sec=0; wait.tv_nsec=5000000L; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 1 ); start_meas(&ru->ofdm_mod_stats); if (subframe_select(fp,subframe) == SF_UL) return; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 1 ); if (subframe_select(fp,subframe)==SF_DL) { // If this is not an S-subframe if (pthread_mutex_timedlock(&proc->mutex_feptx,&wait) != 0) { printf("[RU] ERROR pthread_mutex_lock for feptx thread (IC %d)\n", proc->instance_cnt_feptx); exit_fun( "error locking mutex_feptx" ); return; } if (proc->instance_cnt_feptx==0) { printf("[RU] FEPtx thread busy\n"); exit_fun("FEPtx thread busy"); pthread_mutex_unlock( &proc->mutex_feptx ); return; } ++proc->instance_cnt_feptx; if (pthread_cond_signal(&proc->cond_feptx) != 0) { printf("[RU] ERROR pthread_cond_signal for feptx thread\n"); exit_fun( "ERROR pthread_cond_signal" ); return; } //start_meas(&ru->ofdm_mod_wakeup_stats); pthread_mutex_unlock( &proc->mutex_feptx ); } // call first slot in this thread feptx0(ru,0); start_meas(&ru->ofdm_mod_wait_stats); wait_on_busy_condition(&proc->mutex_feptx,&proc->cond_feptx,&proc->instance_cnt_feptx,"feptx thread"); stop_meas(&ru->ofdm_mod_wait_stats); /*if(opp_enabled == 1 && ru->ofdm_mod_wait_stats.p_time>30*3000){ print_meas_now(&ru->ofdm_mod_wait_stats,"fep wakeup",stderr); printf("delay in feptx wait on codition in frame_rx: %d subframe_rx: %d \n",proc->frame_tx,proc->subframe_tx); }*/ VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 0 ); stop_meas(&ru->ofdm_mod_stats); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 0 ); } void feptx_ofdm(RU_t *ru) { LTE_DL_FRAME_PARMS *fp=&ru->frame_parms; unsigned int aa,slot_offset, slot_offset_F; int dummy_tx_b[7680*4] __attribute__((aligned(32))); int i,j, tx_offset; int slot_sizeF = (fp->ofdm_symbol_size)* ((fp->Ncp==1) ? 6 : 7); int len,len2; int16_t *txdata; int subframe = ru->proc.subframe_tx; // int CC_id = ru->proc.CC_id; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 1 ); slot_offset_F = 0; slot_offset = subframe*fp->samples_per_tti; if ((subframe_select(fp,subframe)==SF_DL)|| ((subframe_select(fp,subframe)==SF_S))) { // LOG_D(HW,"Frame %d: Generating slot %d\n",frame,next_slot); start_meas(&ru->ofdm_mod_stats); for (aa=0; aa<ru->nb_tx; aa++) { if (fp->Ncp == EXTENDED) { PHY_ofdm_mod(&ru->common.txdataF_BF[aa][0], dummy_tx_b, fp->ofdm_symbol_size, 6, fp->nb_prefix_samples, CYCLIC_PREFIX); PHY_ofdm_mod(&ru->common.txdataF_BF[aa][slot_sizeF], dummy_tx_b+(fp->samples_per_tti>>1), fp->ofdm_symbol_size, 6, fp->nb_prefix_samples, CYCLIC_PREFIX); } else { normal_prefix_mod(&ru->common.txdataF_BF[aa][slot_offset_F], dummy_tx_b, 7, fp); // if S-subframe generate first slot only if (subframe_select(fp,subframe) == SF_DL) normal_prefix_mod(&ru->common.txdataF_BF[aa][slot_offset_F+slot_sizeF], dummy_tx_b+(fp->samples_per_tti>>1), 7, fp); } // if S-subframe generate first slot only if (subframe_select(fp,subframe) == SF_S) len = fp->samples_per_tti>>1; else len = fp->samples_per_tti; /* for (i=0;i<len;i+=4) { dummy_tx_b[i] = 0x100; dummy_tx_b[i+1] = 0x01000000; dummy_tx_b[i+2] = 0xff00; dummy_tx_b[i+3] = 0xff000000; }*/ if (slot_offset<0) { txdata = (int16_t*)&ru->common.txdata[aa][(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti)+tx_offset]; len2 = -(slot_offset); len2 = (len2>len) ? len : len2; for (i=0; i<(len2<<1); i++) { txdata[i] = ((int16_t*)dummy_tx_b)[i]; } if (len2<len) { txdata = (int16_t*)&ru->common.txdata[aa][0]; for (j=0; i<(len<<1); i++,j++) { txdata[j++] = ((int16_t*)dummy_tx_b)[i]; } } } else if ((slot_offset+len)>(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti)) { tx_offset = (int)slot_offset; txdata = (int16_t*)&ru->common.txdata[aa][tx_offset]; len2 = -tx_offset+LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; for (i=0; i<(len2<<1); i++) { txdata[i] = ((int16_t*)dummy_tx_b)[i]; } txdata = (int16_t*)&ru->common.txdata[aa][0]; for (j=0; i<(len<<1); i++,j++) { txdata[j++] = ((int16_t*)dummy_tx_b)[i]; } } else { //LOG_D(PHY,"feptx_ofdm: Writing to position %d\n",slot_offset); tx_offset = (int)slot_offset; txdata = (int16_t*)&ru->common.txdata[aa][tx_offset]; for (i=0; i<(len<<1); i++) { txdata[i] = ((int16_t*)dummy_tx_b)[i]; } } // if S-subframe switch to RX in second subframe /* if (subframe_select(fp,subframe) == SF_S) { for (i=0; i<len; i++) { ru->common_vars.txdata[0][aa][tx_offset++] = 0x00010001; } } */ // if ((fp->frame_type == TDD) && // ((fp->tdd_config==0) || // (fp->tdd_config==1) || // (fp->tdd_config==2) || // (fp->tdd_config==6)) && // ((subframe==0) || (subframe==5))) { // // turn on tx switch N_TA_offset before // //LOG_D(HW,"subframe %d, time to switch to tx (N_TA_offset %d, slot_offset %d) \n",subframe,ru->N_TA_offset,slot_offset); // for (i=0; i<ru->N_TA_offset; i++) { // tx_offset = (int)slot_offset+i-ru->N_TA_offset/2; // if (tx_offset<0) // tx_offset += LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; // // if (tx_offset>=(LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti)) // tx_offset -= LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_tti; // // ru->common.txdata[aa][tx_offset] = 0x00000000; // } // } stop_meas(&ru->ofdm_mod_stats); LOG_D(PHY,"feptx_ofdm (TXPATH): frame %d, subframe %d: txp (time %p) %d dB, txp (freq) %d dB\n", ru->proc.frame_tx,subframe,txdata,dB_fixed(signal_energy((int32_t*)txdata,fp->samples_per_tti)), dB_fixed(signal_energy_nodc(ru->common.txdataF_BF[aa],2*slot_sizeF))); } } VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_OFDM , 0 ); } void feptx_prec(RU_t *ru) { int l,i,aa; PHY_VARS_eNB **eNB_list = ru->eNB_list,*eNB; LTE_DL_FRAME_PARMS *fp; int32_t ***bw; int subframe = ru->proc.subframe_tx; if (ru->num_eNB == 1) { eNB = eNB_list[0]; fp = &eNB->frame_parms; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_PREC , 1); for (aa=0;aa<ru->nb_tx;aa++) memcpy((void*)ru->common.txdataF_BF[aa], (void*)&eNB->common_vars.txdataF[aa][subframe*fp->symbols_per_tti*fp->ofdm_symbol_size], fp->symbols_per_tti*fp->ofdm_symbol_size*sizeof(int32_t)); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPTX_PREC , 0); } else { for (i=0;i<ru->num_eNB;i++) { eNB = eNB_list[i]; fp = &eNB->frame_parms; bw = ru->beam_weights[i]; for (l=0;l<fp->symbols_per_tti;l++) { for (aa=0;aa<ru->nb_tx;aa++) { beam_precoding(eNB->common_vars.txdataF, ru->common.txdataF_BF, fp, bw, subframe<<1, l, aa); } } } } } void fep0(RU_t *ru,int slot) { RU_proc_t *proc = &ru->proc; LTE_DL_FRAME_PARMS *fp = &ru->frame_parms; int l; // printf("fep0: slot %d\n",slot); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX+slot, 1); remove_7_5_kHz(ru,(slot&1)+(proc->subframe_rx<<1)); for (l=0; l<fp->symbols_per_tti/2; l++) { slot_fep_ul(ru, l, (slot&1), 0 ); } VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX+slot, 0); } static void *fep_thread(void *param) { RU_t *ru = (RU_t *)param; RU_proc_t *proc = &ru->proc; thread_top_init("fep_thread",1,100000,120000,5000000); pthread_setname_np( pthread_self(),"fep processing"); LOG_I(PHY,"thread fep created id=%ld\n", syscall(__NR_gettid)); cpu_set_t cpuset; CPU_ZERO(&cpuset); //CPU_SET(2, &cpuset); //pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset); //wait_sync("fep_thread"); while (!oai_exit) { if (wait_on_condition(&proc->mutex_fep,&proc->cond_fep,&proc->instance_cnt_fep,"fep thread")<0) break; if (oai_exit) break; //stop_meas(&ru->ofdm_demod_wakeup_stats); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX1, 1 ); fep0(ru,0); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX1, 0 ); if (release_thread(&proc->mutex_fep,&proc->instance_cnt_fep,"fep thread")<0) break; if (pthread_cond_signal(&proc->cond_fep) != 0) { printf("[eNB] ERROR pthread_cond_signal for fep thread exit\n"); exit_fun( "ERROR pthread_cond_signal" ); return NULL; } /*if(opp_enabled == 1 && ru->ofdm_demod_wakeup_stats.p_time>30*3000){ print_meas_now(&ru->ofdm_demod_wakeup_stats,"fep wakeup",stderr); printf("delay in fep wakeup in frame_rx: %d subframe_rx: %d \n",proc->frame_rx,proc->subframe_rx); }*/ } return(NULL); } void init_feptx_thread(RU_t *ru,pthread_attr_t *attr_feptx) { RU_proc_t *proc = &ru->proc; proc->instance_cnt_feptx = -1; pthread_mutex_init( &proc->mutex_feptx, NULL); pthread_cond_init( &proc->cond_feptx, NULL); pthread_create(&proc->pthread_feptx, attr_feptx, feptx_thread, (void*)ru); } void init_fep_thread(RU_t *ru,pthread_attr_t *attr_fep) { RU_proc_t *proc = &ru->proc; proc->instance_cnt_fep = -1; pthread_mutex_init( &proc->mutex_fep, NULL); pthread_cond_init( &proc->cond_fep, NULL); pthread_create(&proc->pthread_fep, attr_fep, fep_thread, (void*)ru); } extern void kill_fep_thread(RU_t *ru) { RU_proc_t *proc = &ru->proc; pthread_mutex_lock( &proc->mutex_fep ); proc->instance_cnt_fep = 0; pthread_cond_signal(&proc->cond_fep); pthread_mutex_unlock( &proc->mutex_fep ); LOG_D(PHY, "Joining pthread_fep\n"); pthread_join(proc->pthread_fep, NULL); pthread_mutex_destroy( &proc->mutex_fep ); pthread_cond_destroy( &proc->cond_fep ); } extern void kill_feptx_thread(RU_t *ru) { RU_proc_t *proc = &ru->proc; pthread_mutex_lock( &proc->mutex_feptx ); proc->instance_cnt_feptx = 0; pthread_cond_signal(&proc->cond_feptx); pthread_mutex_unlock( &proc->mutex_feptx ); LOG_D(PHY, "Joining pthread_feptx\n"); pthread_join(proc->pthread_feptx, NULL); pthread_mutex_destroy( &proc->mutex_feptx ); pthread_cond_destroy( &proc->cond_feptx ); } void ru_fep_full_2thread(RU_t *ru) { RU_proc_t *proc = &ru->proc; struct timespec wait; LTE_DL_FRAME_PARMS *fp=&ru->frame_parms; if ((fp->frame_type == TDD) && (subframe_select(fp,proc->subframe_rx) != SF_UL)) return; if (ru->idx == 0) VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX, 1 ); wait.tv_sec=0; wait.tv_nsec=5000000L; VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX, 1 ); start_meas(&ru->ofdm_demod_stats); if (pthread_mutex_timedlock(&proc->mutex_fep,&wait) != 0) { printf("[RU] ERROR pthread_mutex_lock for fep thread (IC %d)\n", proc->instance_cnt_fep); exit_fun( "error locking mutex_fep" ); return; } if (proc->instance_cnt_fep==0) { printf("[RU] FEP thread busy\n"); exit_fun("FEP thread busy"); pthread_mutex_unlock( &proc->mutex_fep ); return; } ++proc->instance_cnt_fep; if (pthread_cond_signal(&proc->cond_fep) != 0) { printf("[RU] ERROR pthread_cond_signal for fep thread\n"); exit_fun( "ERROR pthread_cond_signal" ); return; } //start_meas(&ru->ofdm_demod_wakeup_stats); pthread_mutex_unlock( &proc->mutex_fep ); // call second slot in this symbol fep0(ru,1); start_meas(&ru->ofdm_demod_wait_stats); wait_on_busy_condition(&proc->mutex_fep,&proc->cond_fep,&proc->instance_cnt_fep,"fep thread"); stop_meas(&ru->ofdm_demod_wait_stats); if(opp_enabled == 1 && ru->ofdm_demod_wakeup_stats.p_time>30*3000){ print_meas_now(&ru->ofdm_demod_wakeup_stats,"fep wakeup",stderr); printf("delay in fep wait on codition in frame_rx: %d subframe_rx: %d \n",proc->frame_rx,proc->subframe_rx); } stop_meas(&ru->ofdm_demod_stats); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX, 0 ); } void fep_full(RU_t *ru) { RU_proc_t *proc = &ru->proc; int l; LTE_DL_FRAME_PARMS *fp=&ru->frame_parms; if ((fp->frame_type == TDD) && (subframe_select(fp,proc->subframe_rx) != SF_UL)) return; start_meas(&ru->ofdm_demod_stats); if (ru->idx == 0) VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX, 1 ); remove_7_5_kHz(ru,proc->subframe_rx<<1); remove_7_5_kHz(ru,1+(proc->subframe_rx<<1)); for (l=0; l<fp->symbols_per_tti/2; l++) { slot_fep_ul(ru, l, 0, 0 ); slot_fep_ul(ru, l, 1, 0 ); } if (ru->idx == 0) VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_RU_FEPRX, 0 ); stop_meas(&ru->ofdm_demod_stats); } void do_prach_ru(RU_t *ru) { RU_proc_t *proc = &ru->proc; LTE_DL_FRAME_PARMS *fp=&ru->frame_parms; // check if we have to detect PRACH first if (is_prach_subframe(fp,proc->frame_prach,proc->subframe_prach)>0) { //accept some delay in processing - up to 5ms int i; for (i = 0; i < 10 && proc->instance_cnt_prach == 0; i++) { LOG_W(PHY,"Frame %d Subframe %d, PRACH thread busy (IC %d)!!\n", proc->frame_prach,proc->subframe_prach, proc->instance_cnt_prach); usleep(500); } if (proc->instance_cnt_prach == 0) { exit_fun( "PRACH thread busy" ); return; } // wake up thread for PRACH RX if (pthread_mutex_lock(&proc->mutex_prach) != 0) { LOG_E( PHY, "ERROR pthread_mutex_lock for PRACH thread (IC %d)\n", proc->instance_cnt_prach ); exit_fun( "error locking mutex_prach" ); return; } ++proc->instance_cnt_prach; // the thread can now be woken up if (pthread_cond_signal(&proc->cond_prach) != 0) { LOG_E( PHY, "ERROR pthread_cond_signal for PRACH thread\n"); exit_fun( "ERROR pthread_cond_signal" ); return; } pthread_mutex_unlock( &proc->mutex_prach ); } }