diff options
| -rw-r--r-- | src/libbsc/abis_rsl.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/src/libbsc/abis_rsl.c b/src/libbsc/abis_rsl.c index 980b3e662..cb2828753 100644 --- a/src/libbsc/abis_rsl.c +++ b/src/libbsc/abis_rsl.c @@ -1890,8 +1890,26 @@ static int rsl_rx_chan_rqd(struct msgb *msg) */ is_lu = !!(chreq_reason == GSM_CHREQ_REASON_LOCATION_UPD); - /* check availability / allocate channel */ - lchan = lchan_alloc(bts, lctype, is_lu); + /* check availability / allocate channel + * + * - First try to allocate SDCCH. + * - If SDCCH is not available, try whatever MS requested, if not SDCCH. + * - If there is still no channel available, reject channel request. + * + * lchan_alloc() possibly tries to allocate larger lchans. + * + * Note: If the MS requests not TCH/H, we don't know if the phone + * supports TCH/H, so we must assign TCH/F or SDCCH. + */ + lchan = lchan_alloc(bts, GSM_LCHAN_SDCCH, 0); + if (!lchan && lctype != GSM_LCHAN_SDCCH) { + LOGP(DRSL, LOGL_NOTICE, "BTS %d CHAN RQD: no resources for %s " + "0x%x, retrying with %s\n", + msg->lchan->ts->trx->bts->nr, + gsm_lchant_name(GSM_LCHAN_SDCCH), rqd_ref->ra, + gsm_lchant_name(lctype)); + lchan = lchan_alloc(bts, lctype, 0); + } if (!lchan) { LOGP(DRSL, LOGL_NOTICE, "BTS %d CHAN RQD: no resources for %s 0x%x\n", msg->lchan->ts->trx->bts->nr, gsm_lchant_name(lctype), rqd_ref->ra); |