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srsLTE
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Fix not recovering from overflow (SFN resync)

This commit is contained in:
Ismael Gomez 2018-05-02 12:56:51 +02:00
parent fa7a6f9581
commit be9f31c5cb
1 changed files with 22 additions and 17 deletions
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39
srsue/src/phy/phch_recv.cc
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@ -540,6 +540,7 @@ void phch_recv::run_thread()
if (phy_state.is_camping()) {
log_h->warning("Detected radio overflow while camping. Resynchronizing cell\n");
sfn_p.reset();
srslte_ue_sync_reset(&ue_sync);
phy_state.force_sfn_sync();
radio_overflow_return = true;
} else {
@ -1047,29 +1048,33 @@ phch_recv::sfn_sync::ret_code phch_recv::sfn_sync::run_subframe(srslte_cell_t *c
}
int sfn_offset = 0;
Info("SYNC: Trying to decode MIB... SNR=%.1f dB\n", 10*log10(srslte_chest_dl_get_snr(&ue_mib.chest)));
int n = srslte_ue_mib_decode(&ue_mib, bch_payload, NULL, &sfn_offset);
if (n < 0) {
Error("SYNC: Error decoding MIB while synchronising SFN");
return ERROR;
} else if (n == SRSLTE_UE_MIB_FOUND) {
uint32_t sfn;
srslte_pbch_mib_unpack(bch_payload, cell, &sfn);
switch(n) {
default:
Error("SYNC: Error decoding MIB while synchronising SFN");
return ERROR;
case SRSLTE_UE_MIB_FOUND:
uint32_t sfn;
srslte_pbch_mib_unpack(bch_payload, cell, &sfn);
sfn = (sfn+sfn_offset)%1024;
if (tti_cnt) {
*tti_cnt = 10*sfn;
Info("SYNC: DONE, TTI=%d, sfn_offset=%d\n", *tti_cnt, sfn_offset);
}
sfn = (sfn+sfn_offset)%1024;
if (tti_cnt) {
*tti_cnt = 10*sfn;
Info("SYNC: DONE, SNR=%.1f dB, TTI=%d, sfn_offset=%d\n",
10*log10(srslte_chest_dl_get_snr(&ue_mib.chest)), *tti_cnt, sfn_offset);
}
srslte_ue_sync_decode_sss_on_track(ue_sync, true);
reset();
return SFN_FOUND;
srslte_ue_sync_decode_sss_on_track(ue_sync, true);
reset();
return SFN_FOUND;
case SRSLTE_UE_MIB_NOTFOUND:
Info("SYNC: Found PSS but could not decode MIB. SNR=%.1f dB (%d/%d)\n",
10*log10(srslte_chest_dl_get_snr(&ue_mib.chest)), cnt, timeout);
break;
}
}
} else {
Info("SYNC: PSS/SSS not found...\n");
Info("SYNC: Waiting for PSS while trying to decode MIB (%d/%d)\n", cnt, timeout);
}
cnt++;