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Write to USRP only when needed in TDD

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This commit is contained in:
Sakthivel Velumani
2021-01-22 15:48:34 +01:00
parent 951fdfef7e
commit 3858af320f
1 changed files with 23 additions and 10 deletions
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executables/nr-ue.c
+23 -10
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@@ -705,8 +705,7 @@ void *UE_thread(void *arg) {
UE->rx_offset_diff = computeSamplesShift(UE);
readBlockSize=get_readBlockSize(slot_nr, &UE->frame_parms) -
UE->rx_offset_diff;
writeBlockSize=UE->frame_parms.get_samples_per_slot((slot_nr + DURATION_RX_TO_TX - RX_NB_TH) % nb_slot_frame, &UE->frame_parms)-
UE->rx_offset_diff;
writeBlockSize=UE->frame_parms.get_samples_per_slot((slot_nr + DURATION_RX_TO_TX - RX_NB_TH) % nb_slot_frame, &UE->frame_parms)- UE->rx_offset_diff;
}
AssertFatal(readBlockSize ==
@@ -765,14 +764,28 @@ void *UE_thread(void *arg) {
timing_advance = UE->timing_advance;
}
AssertFatal( writeBlockSize ==
UE->rfdevice.trx_write_func(&UE->rfdevice,
writeTimestamp,
txp,
writeBlockSize,
UE->frame_parms.nb_antennas_tx,
1),"");
int flags = 0;
int slot_tx_usrp = slot_nr + DURATION_RX_TO_TX - RX_NB_TH;
uint8_t tdd_period = mac->phy_config.config_req.tdd_table.tdd_period_in_slots;
uint8_t num_UL_slots = mac->scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots +
(mac->scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSymbols!=0);
uint8_t first_tx_slot = tdd_period - num_UL_slots;
if (slot_tx_usrp%tdd_period==first_tx_slot)
flags=2;
else if (slot_tx_usrp%tdd_period==first_tx_slot+num_UL_slots-1)
flags = 3;
else if (slot_tx_usrp%tdd_period>first_tx_slot)
flags = 1;
if (flags || IS_SOFTMODEM_RFSIM)
AssertFatal( writeBlockSize ==
UE->rfdevice.trx_write_func(&UE->rfdevice,
writeTimestamp,
txp,
writeBlockSize,
UE->frame_parms.nb_antennas_tx,
flags),"");
for (int i=0; i<UE->frame_parms.nb_antennas_tx; i++)
memset(txp[i], 0, writeBlockSize);
@@ -780,7 +793,7 @@ void *UE_thread(void *arg) {
msgToPush->key=slot_nr;
pushTpool(&(get_nrUE_params()->Tpool), msgToPush);
if ( IS_SOFTMODEM_RFSIM || IS_SOFTMODEM_NOS1) { //getenv("RFSIMULATOR")
if (IS_SOFTMODEM_RFSIM) { //getenv("RFSIMULATOR")
// FixMe: Wait previous thread is done, because race conditions seems too bad
// in case of actual RF board, the overlap between threads mitigate the issue
// We must receive one message, that proves the slot processing is done