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improved real-time performance:

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- gNB now only sends samples to USRP when DL slot. (should do the same for UE)
 - increased sf_ahead to 6
 - fixed timestamp for usrp_write at UE
This commit is contained in:
Florian Kaltenberger
2019-10-11 17:30:55 +02:00
parent 7934ec451a
commit da13ff9c36
4 changed files with 19 additions and 11 deletions
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executables/nr-gnb.c
+2 -2
View File
@@ -108,8 +108,8 @@ extern openair0_config_t openair0_cfg[MAX_CARDS];
extern int transmission_mode;
uint16_t sl_ahead=4;
uint16_t sf_ahead=4;
uint16_t sl_ahead=6;
uint16_t sf_ahead=6;
//pthread_t main_gNB_thread;
time_stats_t softmodem_stats_mt; // main thread
executables/nr-ru.c
+11 -2
View File
@@ -732,9 +732,17 @@ void tx_rf(RU_t *ru,int frame,int slot, uint64_t timestamp) {
T(T_ENB_PHY_OUTPUT_SIGNAL, T_INT(0), T_INT(0), T_INT(frame), T_INT(slot),
T_INT(0), T_BUFFER(&ru->common.txdata[0][slot * fp->samples_per_slot], fp->samples_per_slot * 4));
int sf_extension = 0;
//nr_subframe_t SF_type = nr_slot_select(cfg,slot%fp->slots_per_frame);
nr_subframe_t SF_type = nr_slot_select(cfg,slot%fp->slots_per_frame);
if ((slot == 0) ||
(slot == 1)) {
int siglen=fp->samples_per_slot;
int flags;
if (slot==0)
flags = 2;
else if (slot==1)
flags=3;
int siglen=fp->samples_per_slot,flags=1;
/*
if (SF_type == SF_S) {
siglen = fp->dl_symbols_in_S_subframe*(fp->ofdm_symbol_size+fp->nb_prefix_samples0);
@@ -774,6 +782,7 @@ void tx_rf(RU_t *ru,int frame,int slot, uint64_t timestamp) {
(long long unsigned int)timestamp,frame,proc->frame_tx_unwrap,slot);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
AssertFatal(txs == siglen+sf_extension,"TX : Timeout (sent %d/%d)\n",txs, siglen);
}
}
executables/nr-ue.c
+2 -2
View File
@@ -699,7 +699,7 @@ void *UE_thread(void *arg) {
slot_nr*UE->frame_parms.samples_per_slot];
for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
txp[i] = (void *)&UE->common_vars.txdata[i][((curMsg->proc.nr_tti_rx + 2)%nb_slot_frame)*UE->frame_parms.samples_per_slot];
txp[i] = (void *)&UE->common_vars.txdata[i][((curMsg->proc.nr_tti_rx + DURATION_RX_TO_TX)%nb_slot_frame)*UE->frame_parms.samples_per_slot];
int readBlockSize, writeBlockSize;
@@ -725,7 +725,7 @@ void *UE_thread(void *arg) {
AssertFatal( writeBlockSize ==
UE->rfdevice.trx_write_func(&UE->rfdevice,
timestamp+
(2*UE->frame_parms.samples_per_slot) -
(DURATION_RX_TO_TX*UE->frame_parms.samples_per_slot) -
UE->frame_parms.ofdm_symbol_size-UE->frame_parms.nb_prefix_samples0 -
openair0_cfg[0].tx_sample_advance,
txp,