diff --git a/cmake_targets/CMakeLists.txt b/cmake_targets/CMakeLists.txt index 631a65b0dc..7bd7ee60c0 100644 --- a/cmake_targets/CMakeLists.txt +++ b/cmake_targets/CMakeLists.txt @@ -2368,9 +2368,9 @@ if (${T_TRACER}) oai_exmimodevif oai_usrpdevif oai_bladerfdevif oai_lmssdrdevif oai_eth_transpro FLPT_MSG ASYNC_IF FLEXRAN_AGENT HASHTABLE MSC UTIL OMG_SUMO SECU_OSA - SECU_CN SCHED_LIB PHY L2 default_sched remote_sched RAL CN_UTILS - GTPV1U SCTP_CLIENT UDP LIB_NAS_UE LFDS LFDS7 SIMU OPENAIR0_LIB PHY_MEX - coding) + SECU_CN SCHED_LIB SCHED_RU_LIB SCHED_UE_LIB PHY L2 default_sched + remote_sched RAL CN_UTILS GTPV1U SCTP_CLIENT UDP LIB_NAS_UE LFDS + LFDS7 SIMU OPENAIR0_LIB PHY_MEX coding) if (TARGET ${i}) add_dependencies(${i} generate_T) endif() diff --git a/openair1/PHY/defs_eNB.h b/openair1/PHY/defs_eNB.h index 271d54fdce..d3157d5e82 100644 --- a/openair1/PHY/defs_eNB.h +++ b/openair1/PHY/defs_eNB.h @@ -312,6 +312,10 @@ typedef struct RU_t_s{ LTE_DL_FRAME_PARMS frame_parms; ///timing offset used in TDD int N_TA_offset; + /// SF extension used in TDD (unit: number of samples at 30.72MHz) (this is an expert option) + int sf_extension; + /// "end of burst delay" used in TDD (unit: number of samples at 30.72MHz) (this is an expert option) + int end_of_burst_delay; /// RF device descriptor openair0_device rfdevice; /// HW configuration diff --git a/openair2/ENB_APP/enb_paramdef.h b/openair2/ENB_APP/enb_paramdef.h index 98a5e4206e..54d6decfee 100644 --- a/openair2/ENB_APP/enb_paramdef.h +++ b/openair2/ENB_APP/enb_paramdef.h @@ -101,6 +101,8 @@ typedef enum { #define CONFIG_STRING_RU_NBIOTRRC_LIST "NbIoT_RRC_instances" #define CONFIG_STRING_RU_SDR_ADDRS "sdr_addrs" #define CONFIG_STRING_RU_SDR_CLK_SRC "clock_src" +#define CONFIG_STRING_RU_SF_EXTENSION "sf_extension" +#define CONFIG_STRING_RU_END_OF_BURST_DELAY "end_of_burst_delay" #define RU_LOCAL_IF_NAME_IDX 0 #define RU_LOCAL_ADDRESS_IDX 1 @@ -122,6 +124,8 @@ typedef enum { #define RU_NBIOTRRC_LIST_IDX 17 #define RU_SDR_ADDRS 18 #define RU_SDR_CLK_SRC 19 +#define RU_SF_EXTENSION_IDX 20 +#define RU_END_OF_BURST_DELAY_IDX 21 @@ -149,7 +153,9 @@ typedef enum { {CONFIG_STRING_RU_ATT_RX, NULL, 0, uptr:NULL, defintval:0, TYPE_UINT, 0}, \ {CONFIG_STRING_RU_NBIOTRRC_LIST, NULL, 0, uptr:NULL, defintarrayval:DEFENBS, TYPE_INTARRAY, 1}, \ {CONFIG_STRING_RU_SDR_ADDRS, NULL, 0, strptr:NULL, defstrval:"type=b200", TYPE_STRING, 0}, \ -{CONFIG_STRING_RU_SDR_CLK_SRC, NULL, 0, strptr:NULL, defstrval:"internal", TYPE_STRING, 0}, \ +{CONFIG_STRING_RU_SDR_CLK_SRC, NULL, 0, strptr:NULL, defstrval:"internal", TYPE_STRING, 0}, \ +{CONFIG_STRING_RU_SF_EXTENSION, NULL, 0, uptr:NULL, defuintval:312, TYPE_UINT, 0}, \ +{CONFIG_STRING_RU_END_OF_BURST_DELAY, NULL, 0, uptr:NULL, defuintval:400, TYPE_UINT, 0}, \ } /*---------------------------------------------------------------------------------------------------------------------------------------*/ diff --git a/targets/RT/USER/lte-ru.c b/targets/RT/USER/lte-ru.c index 787e630d17..d4c53441d6 100644 --- a/targets/RT/USER/lte-ru.c +++ b/targets/RT/USER/lte-ru.c @@ -818,7 +818,6 @@ void tx_rf(RU_t *ru) { T_INT(0), T_BUFFER(&ru->common.txdata[0][proc->subframe_tx * fp->samples_per_tti], fp->samples_per_tti * 4)); lte_subframe_t SF_type = subframe_select(fp,proc->subframe_tx%10); lte_subframe_t prevSF_type = subframe_select(fp,(proc->subframe_tx+9)%10); - lte_subframe_t nextSF_type = subframe_select(fp,(proc->subframe_tx+1)%10); int sf_extension = 0; if ((SF_type == SF_DL) || @@ -826,24 +825,24 @@ void tx_rf(RU_t *ru) { int siglen=fp->samples_per_tti,flags=1; if (SF_type == SF_S) { - siglen = fp->dl_symbols_in_S_subframe*(fp->ofdm_symbol_size+fp->nb_prefix_samples0); + /* end_of_burst_delay is used to stop TX only "after a while". + * If we stop right after effective signal, with USRP B210 and + * B200mini, we observe a high EVM on the S subframe (on the + * PSS). + * A value of 400 (for 30.72MHz) solves this issue. This is + * the default. + */ + siglen = (fp->ofdm_symbol_size + fp->nb_prefix_samples0) + + (fp->dl_symbols_in_S_subframe - 1) * (fp->ofdm_symbol_size + fp->nb_prefix_samples) + + ru->end_of_burst_delay; flags=3; // end of burst } - if ((fp->frame_type == TDD) && - (SF_type == SF_DL)&& - (prevSF_type == SF_UL) && - (nextSF_type == SF_DL)) { + if (fp->frame_type == TDD && + SF_type == SF_DL && + prevSF_type == SF_UL) { flags = 2; // start of burst - sf_extension = ru->N_TA_offset; - } - - if ((fp->frame_type == TDD) && - (SF_type == SF_DL)&& - (prevSF_type == SF_UL) && - (nextSF_type == SF_UL)) { - flags = 4; // start of burst and end of burst (only one DL SF between two UL) - sf_extension = ru->N_TA_offset; + sf_extension = ru->sf_extension; } #if defined(__x86_64) || defined(__i386__) @@ -1386,6 +1385,22 @@ int setup_RU_buffers(RU_t *ru) { * TODO: find a proper cleaner solution */ ru->N_TA_offset = 0; + + if (frame_parms->N_RB_DL == 100) /* no scaling to do */; + else if (frame_parms->N_RB_DL == 50) { + ru->sf_extension /= 2; + ru->end_of_burst_delay /= 2; + } else if (frame_parms->N_RB_DL == 25) { + ru->sf_extension /= 4; + ru->end_of_burst_delay /= 4; + } else { + printf("not handled, todo\n"); + exit(1); + } + } else { + ru->N_TA_offset = 0; + ru->sf_extension = 0; + ru->end_of_burst_delay = 0; } if (ru->openair0_cfg.mmapped_dma == 1) { @@ -2883,6 +2898,9 @@ void RCconfig_RU(void) { RC.ru[j]->max_pdschReferenceSignalPower = *(RUParamList.paramarray[j][RU_MAX_RS_EPRE_IDX].uptr);; RC.ru[j]->max_rxgain = *(RUParamList.paramarray[j][RU_MAX_RXGAIN_IDX].uptr); RC.ru[j]->num_bands = RUParamList.paramarray[j][RU_BAND_LIST_IDX].numelt; + /* sf_extension is in unit of samples for 30.72MHz here, has to be scaled later */ + RC.ru[j]->sf_extension = *(RUParamList.paramarray[j][RU_SF_EXTENSION_IDX].uptr); + RC.ru[j]->end_of_burst_delay = *(RUParamList.paramarray[j][RU_END_OF_BURST_DELAY_IDX].uptr); for (i=0; inum_bands; i++) RC.ru[j]->band[i] = RUParamList.paramarray[j][RU_BAND_LIST_IDX].iptr[i]; } //strcmp(local_rf, "yes") == 0