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Use command line option for sell search

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There is already a command line option called 'ue-scan-carrier' which
seemed to blindly look for SSB by changing the center frequency by
+/-100Hz if the previous attempt failed. This is probably copied from
LTE and is not suitable for NR. This commit uses this option to either
1. Perform initial sync on one GSCN if the SSB position if known
2. Or scan the all GSCN (if the SSB postion is unknown)

Also, the following is done for re-synchronization
1. Scan all GSCN when UE comes back from IDLE state
2. Scan one GSCN when UE does re-estabishment

Removed dependency of lte-softmodem.h in nr-softmodem.c.
CONFIG_HLP_UESCAN is declared also in lte-softmodem.h.
This commit is contained in:
Sakthivel Velumani
2024-05-30 10:20:55 -04:00
parent 26aa7c2e33
commit ca93e68410
9 changed files with 51 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
+10 -17
View File
@@ -293,13 +293,15 @@ void nr_scan_ssb(void *arg)
}
}
nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, int n_frames, int sa)
nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc,
PHY_VARS_NR_UE *ue,
int n_frames,
int sa,
nr_gscn_info_t gscnInfo[MAX_GSCN_BAND],
int numGscn)
{
NR_DL_FRAME_PARMS *fp = &ue->frame_parms;
// Get list of GSCN in this band, current UE's bandwidth and center frequency.
nr_gscn_info_t gscnInfo[MAX_GSCN_BAND];
int numScans = get_scan_ssb_first_sc(fp->dl_CarrierFreq, fp->N_RB_DL, fp->nr_band, fp->numerology_index, gscnInfo);
notifiedFIFO_t nf;
initNotifiedFIFO(&nf);
@@ -308,8 +310,8 @@ nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, i
"Starting cell search with center freq: %ld, bandwidth: %d. Scanning for %d number of GSCN.\n",
fp->dl_CarrierFreq,
fp->N_RB_DL,
numScans);
for (int s = 0; s < numScans; s++) {
numGscn);
for (int s = 0; s < numGscn; s++) {
notifiedFIFO_elt_t *req = newNotifiedFIFO_elt(sizeof(nr_ue_ssb_scan_t), gscnInfo[s].gscn, &nf, &nr_scan_ssb);
nr_ue_ssb_scan_t *ssbInfo = (nr_ue_ssb_scan_t *)NotifiedFifoData(req);
ssbInfo->gscnInfo = gscnInfo[s];
@@ -334,7 +336,7 @@ nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, i
// Collect the scan results
nr_ue_ssb_scan_t res = {0};
while (numScans) {
while (numGscn) {
notifiedFIFO_elt_t *req = pullTpool(&nf, &get_nrUE_params()->Tpool);
nr_ue_ssb_scan_t *ssbInfo = (nr_ue_ssb_scan_t *)NotifiedFifoData(req);
if (ssbInfo->syncRes.cell_detected) {
@@ -354,7 +356,7 @@ nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, i
}
free(ssbInfo->rxdata);
delNotifiedFIFO_elt(req);
numScans--;
numGscn--;
}
// Set globals based on detected cell
@@ -446,15 +448,6 @@ nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, i
if (res.syncRes.cell_detected) {
LOG_I(PHY, "[UE%d] In synch, rx_offset %d samples\n", ue->Mod_id, res.syncRes.rx_offset);
if (ue->UE_scan_carrier == 0) {
#if UE_AUTOTEST_TRACE
LOG_I(PHY,
"[UE %d] AUTOTEST Cell Sync : rx_offset %d, freq_offset %d \n",
ue->Mod_id,
ue->rx_offset,
ue->common_vars.freq_offset);
#endif
}
LOG_I(PHY, "[UE %d] Measured Carrier Frequency offset %d Hz\n", ue->Mod_id, res.freqOffset);
} else {
#ifdef DEBUG_INITIAL_SYNC
openair1/PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h
+6 -1
View File
@@ -325,7 +325,12 @@ int dump_ue_stats(PHY_VARS_NR_UE *phy_vars_ue,
@param n_frames
@param sa current running mode
*/
nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *phy_vars_ue, int n_frames, int sa);
nr_initial_sync_t nr_initial_sync(UE_nr_rxtx_proc_t *proc,
PHY_VARS_NR_UE *phy_vars_ue,
int n_frames,
int sa,
nr_gscn_info_t gscnInfo[MAX_GSCN_BAND],
int numGscn);
/*!
\brief This function gets the carrier frequencies either from FP or command-line-set global variables, depending on the