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UE changes in PHY- Enable SSB based SINR measurement

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This commit is contained in:
Raghavendra Dinavahi
2025-04-15 16:02:34 +02:00
parent 61778f3d55
commit 6e371b9e48
9 changed files with 35 additions and 20 deletions
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nfapi/open-nFAPI/nfapi/public_inc/fapi_nr_ue_interface.h
+2
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@@ -129,6 +129,8 @@ typedef struct {
short rsrp_dBm;
long arfcn;
rlm_t radiolink_monitoring; // -1 no monitoring, 0 out_of_sync, 1 in_sync
// SINR value times 10 as reporting granularity is 0.5
float sinr_dB;
} fapi_nr_ssb_pdu_t;
typedef struct {
openair1/PHY/INIT/nr_init_ue.c
+3 -1
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@@ -180,8 +180,10 @@ int init_nr_ue_signal(PHY_VARS_NR_UE *ue, int nb_connected_gNB)
AssertFatal( nb_connected_gNB <= NUMBER_OF_CONNECTED_gNB_MAX, "n_connected_gNB is too large" );
// init phy_vars_ue
for (int i = 0; i < fp->Lmax; i++)
for (int i = 0; i < fp->Lmax; i++) {
ue->measurements.ssb_rsrp_dBm[i] = INT_MIN;
ue->measurements.ssb_sinr_dB[i] = INT_MIN;
}
for (int i = 0; i < 4; i++) {
ue->rx_gain_max[i] = 135;
openair1/PHY/NR_UE_ESTIMATION/nr_estimation.h
+5 -5
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@@ -111,11 +111,11 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
uint32_t pdsch_est_size,
int32_t dl_ch_estimates[][pdsch_est_size]);
int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier);
uint32_t nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier);
void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
uint8_t gNB_index,
openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c
+16 -11
View File
@@ -172,11 +172,11 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
// This function calculates:
// - SS reference signal received digital power in dB/RE
int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier)
uint32_t nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
const UE_nr_rxtx_proc_t *proc,
const c16_t rxdataF[][fp->samples_per_slot_wCP],
int symbol_offset,
int ssb_start_subcarrier)
{
int k_start = 56;
int k_end = 183;
@@ -209,9 +209,7 @@ int nr_ue_calculate_ssb_rsrp(const NR_DL_FRAME_PARMS *fp,
LOG_D(PHY, "In %s: RSRP/nb_re: %d nb_re :%d\n", __FUNCTION__, rsrp, nb_re);
int rsrp_db_per_re = 10 * log10(rsrp);
return rsrp_db_per_re;
return rsrp;
}
// This function implements:
@@ -234,7 +232,8 @@ void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
if (fp->half_frame_bit)
symbol_offset += (fp->slots_per_frame >> 1) * fp->symbols_per_slot;
int rsrp_db_per_re = nr_ue_calculate_ssb_rsrp(fp, proc, rxdataF, symbol_offset, fp->ssb_start_subcarrier);
uint32_t rsrp_avg = nr_ue_calculate_ssb_rsrp(fp, proc, rxdataF, symbol_offset, fp->ssb_start_subcarrier);
float rsrp_db_per_re = 10 * log10(rsrp_avg);
openair0_config_t *cfg0 = &openair0_cfg[0];
@@ -242,12 +241,18 @@ void nr_ue_ssb_rsrp_measurements(PHY_VARS_NR_UE *ue,
- ((int)cfg0->rx_gain[0] - (int)cfg0->rx_gain_offset[0])
- dB_fixed(fp->ofdm_symbol_size);
// to obtain non-integer dB value with a resoluion of 0.5dB
uint32_t signal_pwr = rsrp_avg > ue->measurements.n0_power_avg ? rsrp_avg - ue->measurements.n0_power_avg : 0;
int SNRtimes10 = dB_fixed_x10(signal_pwr) - dB_fixed_x10(ue->measurements.n0_power_avg);
ue->measurements.ssb_sinr_dB[ssb_index] = SNRtimes10 / 10.0;
LOG_D(PHY,
"[UE %d] ssb %d SS-RSRP: %d dBm/RE (%d dB/RE)\n",
"[UE %d] ssb %d SS-RSRP: %d dBm/RE (%f dB/RE), SS-SINR: %f dB\n",
ue->Mod_id,
ssb_index,
ue->measurements.ssb_rsrp_dBm[ssb_index],
rsrp_db_per_re);
rsrp_db_per_re,
ue->measurements.ssb_sinr_dB[ssb_index]);
}
// This function computes the received noise power
openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
+2 -1
View File
@@ -285,7 +285,8 @@ void nr_scan_ssb(void *arg)
&ssbInfo->pbchResult,
rxdataF); // start pbch detection at first symbol after pss
if (ssbInfo->syncRes.cell_detected) {
int rsrp_db_per_re = nr_ue_calculate_ssb_rsrp(ssbInfo->fp, ssbInfo->proc, rxdataF, 0, ssbInfo->gscnInfo.ssbFirstSC);
uint32_t rsrp_avg = nr_ue_calculate_ssb_rsrp(ssbInfo->fp, ssbInfo->proc, rxdataF, 0, ssbInfo->gscnInfo.ssbFirstSC);
int rsrp_db_per_re = 10 * log10(rsrp_avg);
ssbInfo->adjust_rxgain = TARGET_RX_POWER - rsrp_db_per_re;
LOG_I(PHY, "pbch rx ok. rsrp:%d dB/RE, adjust_rxgain:%d dB\n", rsrp_db_per_re, ssbInfo->adjust_rxgain);
}
openair1/PHY/defs_nr_UE.h
+1
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@@ -140,6 +140,7 @@ typedef struct {
uint32_t rsrp[7];
short rsrp_dBm[7];
int ssb_rsrp_dBm[64];
float ssb_sinr_dB[64];
// common measurements
//! estimated noise power (linear)
unsigned int n0_power[NB_ANTENNAS_RX];
openair1/SCHED_NR_UE/phy_procedures_nr_ue.c
+1
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@@ -175,6 +175,7 @@ void nr_fill_rx_indication(fapi_nr_rx_indication_t *rx_ind,
rx->ssb_pdu.cell_id = frame_parms->Nid_cell;
rx->ssb_pdu.ssb_start_subcarrier = frame_parms->ssb_start_subcarrier;
rx->ssb_pdu.rsrp_dBm = ue->measurements.ssb_rsrp_dBm[frame_parms->ssb_index];
rx->ssb_pdu.sinr_dB = ue->measurements.ssb_sinr_dB[frame_parms->ssb_index];
rx->ssb_pdu.arfcn = get_ssb_arfcn(frame_parms);
rx->ssb_pdu.radiolink_monitoring = RLM_in_sync; // TODO to be removed from here
rx->ssb_pdu.decoded_pdu = true;
openair2/LAYER2/NR_MAC_UE/mac_defs.h
+1
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@@ -417,6 +417,7 @@ typedef struct {
uint32_t ssb_index;
/// SSB RSRP in dBm
short ssb_rsrp_dBm;
float_t ssb_sinr_dB;
} NR_SSB_meas_t;
typedef enum ta_type {
openair2/NR_UE_PHY_INTERFACE/NR_IF_Module.c
+4 -2
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@@ -1133,10 +1133,11 @@ static nr_dci_format_t handle_dci(NR_UE_MAC_INST_t *mac,
return nr_ue_process_dci_indication_pdu(mac, frame, slot, dci);
}
static void handle_ssb_meas(NR_UE_MAC_INST_t *mac, uint8_t ssb_index, int16_t rsrp_dbm)
static void handle_ssb_meas(NR_UE_MAC_INST_t *mac, uint8_t ssb_index, int16_t rsrp_dbm, float_t sinr_dB)
{
mac->ssb_measurements.ssb_index = ssb_index;
mac->ssb_measurements.ssb_rsrp_dBm = rsrp_dbm;
mac->ssb_measurements.ssb_sinr_dB = sinr_dB;
}
// L2 Abstraction Layer
@@ -1272,7 +1273,8 @@ static uint32_t nr_ue_dl_processing(NR_UE_MAC_INST_t *mac, nr_downlink_indicatio
if(rx_indication_body.ssb_pdu.decoded_pdu) {
handle_ssb_meas(mac,
rx_indication_body.ssb_pdu.ssb_index,
rx_indication_body.ssb_pdu.rsrp_dBm);
rx_indication_body.ssb_pdu.rsrp_dBm,
rx_indication_body.ssb_pdu.sinr_dB);
ret_mask |= (handle_bcch_bch(mac,
dl_info->cc_id,
dl_info->gNB_index,