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add support for continuous transmission

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In case of TDD we usually disable TX during RX.
Unfortunately some USRPs create self-interference after disabling TX.
To be able to work-around this issue, we add the flag "--continuous-tx".
This commit is contained in:
Thomas Schlichter
2022-02-09 08:56:15 +01:00
parent 1ed58f65b7
commit 76885758aa
4 changed files with 58 additions and 34 deletions
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executables/nr-gnb.c
+17 -4
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@@ -210,7 +210,6 @@ void rx_func(void *param) {
if (pthread_mutex_unlock(&rnti_to_remove_mutex)) exit(1);
// RX processing
int tx_slot_type = nr_slot_select(cfg,frame_tx,slot_tx);
int rx_slot_type = nr_slot_select(cfg,frame_rx,slot_rx);
if (rx_slot_type == NR_UPLINK_SLOT || rx_slot_type == NR_MIXED_SLOT) {
// UE-specific RX processing for subframe n
@@ -244,7 +243,8 @@ void rx_func(void *param) {
gNB->if_inst->NR_UL_indication(&gNB->UL_INFO);
pthread_mutex_unlock(&gNB->UL_INFO_mutex);
stop_meas(&gNB->ul_indication_stats);
int tx_slot_type = nr_slot_select(cfg,frame_rx,slot_tx);
if (tx_slot_type == NR_DOWNLINK_SLOT || tx_slot_type == NR_MIXED_SLOT) {
notifiedFIFO_elt_t *res;
processingData_L1tx_t *syncMsg;
@@ -256,8 +256,17 @@ void rx_func(void *param) {
syncMsg->timestamp_tx = info->timestamp_tx;
res->key = slot_tx;
pushTpool(gNB->threadPool, res);
} else if (get_softmodem_params()->continuous_tx) {
notifiedFIFO_elt_t *res = pullTpool(gNB->L1_tx_free, gNB->threadPool);
processingData_L1tx_t *syncMsg = (processingData_L1tx_t *)NotifiedFifoData(res);
syncMsg->gNB = gNB;
syncMsg->timestamp_tx = info->timestamp_tx;
syncMsg->frame = frame_tx;
syncMsg->slot = slot_tx;
res->key = slot_tx;
pushNotifiedFIFO(gNB->L1_tx_out, res);
}
#if 0
LOG_D(PHY, "rxtx:%lld nfapi:%lld phy:%lld tx:%lld rx:%lld prach:%lld ofdm:%lld ",
softmodem_stats_rxtx_sf.diff_now, nfapi_meas.diff_now,
@@ -397,7 +406,11 @@ void *tx_reorder_thread(void* param) {
syncMsgRU.slot_tx = syncMsgL1->slot;
syncMsgRU.timestamp_tx = syncMsgL1->timestamp_tx;
syncMsgRU.ru = gNB->RU_list[0];
next_tx_slot = get_next_downlink_slot(gNB, &gNB->gNB_config, syncMsgRU.frame_tx, syncMsgRU.slot_tx);
if (get_softmodem_params()->continuous_tx) {
int slots_per_frame = gNB->frame_parms.slots_per_frame;
next_tx_slot = (syncMsgRU.slot_tx + 1) % slots_per_frame;
} else
next_tx_slot = get_next_downlink_slot(gNB, &gNB->gNB_config, syncMsgRU.frame_tx, syncMsgRU.slot_tx);
pushNotifiedFIFO(gNB->L1_tx_free, resL1);
if (resL1==resL1Reserve)
resL1Reserve=NULL;