From a7db9280b8186ea4b1b8f31e79fb29a38f97e46e Mon Sep 17 00:00:00 2001
From: Roberto Louro Magueta <rmagueta@allbesmart.pt>
Date: Mon, 19 Dec 2022 01:56:08 +0000
Subject: [PATCH] Generate SRS sequence only when needed
---
openair1/PHY/defs_nr_common.h | 1 +
openair1/SCHED_NR/phy_procedures_nr_gNB.c | 18 +++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/openair1/PHY/defs_nr_common.h b/openair1/PHY/defs_nr_common.h
index fe0397970bb..6529037a33d 100644
--- a/openair1/PHY/defs_nr_common.h
+++ b/openair1/PHY/defs_nr_common.h
@@ -206,6 +206,7 @@ typedef struct {
uint8_t k_0_p[MAX_NUM_NR_SRS_AP][MAX_NUM_NR_SRS_SYMBOLS];
uint8_t srs_generated_signal_bits;
int32_t **srs_generated_signal;
+ nfapi_nr_srs_pdu_t srs_pdu;
} nr_srs_info_t;
typedef struct {
diff --git a/openair1/SCHED_NR/phy_procedures_nr_gNB.c b/openair1/SCHED_NR/phy_procedures_nr_gNB.c
index dfeeab7d7a5..38e1cfd3b4d 100644
--- a/openair1/SCHED_NR/phy_procedures_nr_gNB.c
+++ b/openair1/SCHED_NR/phy_procedures_nr_gNB.c
@@ -670,6 +670,20 @@ int fill_srs_channel_matrix(uint8_t *channel_matrix,
return 0;
}
+int check_srs_pdu(const nfapi_nr_srs_pdu_t *srs_pdu, nfapi_nr_srs_pdu_t *saved_srs_pdu)
+{
+ if (saved_srs_pdu->bwp_start == srs_pdu->bwp_start &&
+ saved_srs_pdu->bwp_size == srs_pdu->bwp_size &&
+ saved_srs_pdu->num_ant_ports == srs_pdu->num_ant_ports &&
+ saved_srs_pdu->time_start_position == srs_pdu->time_start_position &&
+ saved_srs_pdu->num_symbols == srs_pdu->num_symbols &&
+ saved_srs_pdu->config_index == srs_pdu->config_index) {
+ return 1;
+ }
+ *saved_srs_pdu = *srs_pdu;
+ return 0;
+}
+
int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
/* those variables to log T_GNB_PHY_PUCCH_PUSCH_IQ only when we try to decode */
int pucch_decode_done = 0;
@@ -875,7 +889,9 @@ int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
int8_t snr;
start_meas(&gNB->generate_srs_stats);
- generate_srs_nr(srs_pdu, frame_parms, gNB->nr_srs_info[i]->srs_generated_signal, 0, gNB->nr_srs_info[i], AMP, frame_rx, slot_rx);
+ if (check_srs_pdu(srs_pdu, &gNB->nr_srs_info[i]->srs_pdu) == 0) {
+ generate_srs_nr(srs_pdu, frame_parms, gNB->nr_srs_info[i]->srs_generated_signal, 0, gNB->nr_srs_info[i], AMP, frame_rx, slot_rx);
+ }
stop_meas(&gNB->generate_srs_stats);
start_meas(&gNB->get_srs_signal_stats);
--
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