diff options
| author | Alexander Chemeris <Alexander.Chemeris@gmail.com> | 2015-04-06 00:12:02 +0300 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2015-09-22 16:41:31 +0200 |
| commit | 6fceaca584aa84214ccf747257344f1fe95caeee (patch) | |
| tree | 8e139d2f300c759402ec2d99f0f41d697db7c7c8 /src/osmo-bts-trx/l1_if.c | |
| parent | ddc0bf14d5d5c8b3248eab0463399ae0a5bb8e3f (diff) | |
trx: Implement BER calculations.
A known issue with this code is that BER is not updated for lost TCH frames,
because osmo-trx doesn't send any indication for them and we don't have
a callback to handle this.
Otherwise the code seem to work fine.
Diffstat (limited to 'src/osmo-bts-trx/l1_if.c')
| -rw-r--r-- | src/osmo-bts-trx/l1_if.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/src/osmo-bts-trx/l1_if.c b/src/osmo-bts-trx/l1_if.c index 3f2a565a..6f8cd845 100644 --- a/src/osmo-bts-trx/l1_if.c +++ b/src/osmo-bts-trx/l1_if.c @@ -2,6 +2,7 @@ * layer 1 primitive handling and interface * * Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu> + * Copyright (C) 2015 Alexander Chemeris <Alexander.Chemeris@fairwaves.co> * * All Rights Reserved * @@ -454,19 +455,33 @@ int l1if_mph_time_ind(struct gsm_bts *bts, uint32_t fn) return l1sap_up(bts->c0, &l1sap); } -int l1if_process_meas_res(struct gsm_bts_trx *trx, uint8_t chan_nr, float qta, + +void l1if_fill_meas_res(struct osmo_phsap_prim *l1sap, uint8_t chan_nr, float ta, float ber, float rssi) { + memset(l1sap, 0, sizeof(*l1sap)); + osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_MPH_INFO, + PRIM_OP_INDICATION, NULL); + l1sap->u.info.type = PRIM_INFO_MEAS; + l1sap->u.info.u.meas_ind.chan_nr = chan_nr; + l1sap->u.info.u.meas_ind.ta_offs_qbits = (int16_t)(ta*4); + l1sap->u.info.u.meas_ind.ber10k = (unsigned int) (ber * 10000); + l1sap->u.info.u.meas_ind.inv_rssi = (uint8_t) (rssi * -1); +} + +int l1if_process_meas_res(struct gsm_bts_trx *trx, uint8_t tn, uint32_t fn, uint8_t chan_nr, + int n_errors, int n_bits_total, float rssi, float toa) +{ + struct gsm_lchan *lchan = &trx->ts[tn].lchan[l1sap_chan2ss(chan_nr)]; struct osmo_phsap_prim l1sap; + float ber = (float)n_errors / (float)n_bits_total; - memset(&l1sap, 0, sizeof(l1sap)); - osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, - PRIM_OP_INDICATION, NULL); - l1sap.u.info.type = PRIM_INFO_MEAS; - l1sap.u.info.u.meas_ind.chan_nr = chan_nr; - l1sap.u.info.u.meas_ind.ta_offs_qbits = qta; - l1sap.u.info.u.meas_ind.ber10k = (unsigned int) (ber * 100); - l1sap.u.info.u.meas_ind.inv_rssi = (uint8_t) (rssi * -1); + LOGP(DMEAS, LOGL_DEBUG, "RX L1 frame %s fn=%u chan_nr=0x%02x MS pwr=%ddBm rssi=%.1f dBFS " + "ber=%.2f%% (%d/%d bits) L1_ta=%d rqd_ta=%d toa=%.2f\n", + gsm_lchan_name(lchan), fn, chan_nr, ms_pwr_dbm(lchan->ts->trx->bts->band, lchan->ms_power), + rssi, ber*100, n_errors, n_bits_total, lchan->meas.l1_info[1], lchan->rqd_ta, toa); + + l1if_fill_meas_res(&l1sap, chan_nr, lchan->rqd_ta + toa, ber, rssi); return l1sap_up(trx, &l1sap); } |