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Minh-Quang Nguyen gerrit-no-reply at lists.osmocom.orgMinh-Quang Nguyen has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/15909 ) Change subject: RSL: Wrong CCCH_CONFIG in SI3 causes a lot of MO call setup failed when the BTS configured with none combined CCCH mode. ...................................................................... RSL: Wrong CCCH_CONFIG in SI3 causes a lot of MO call setup failed when the BTS configured with none combined CCCH mode. Issue: MO call setup signaling failed when the CCCH is configured in none combined with SDCCH (a dedicated TS is configured for SDCCH). The call setup signaling attempts in all SDCCH sub-channels until the MO call setup failed as shown below: <0007> ../../../git/src/osmo-bsc/osmo_bsc_sigtran.c:305 Initializing resources for new SIGTRAN connection to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP... <0007> ../../../git/src/osmo-bsc/osmo_bsc_sigtran.c:351 Opening new SIGTRAN connection (id=1) to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP <0010> ../../../git/src/osmo-bsc/lchan_fsm.c:80 lchan(0-0-1-SDCCH8-0)[0x1eb888]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout <0007> ../../../git/src/osmo-bsc/osmo_bsc_bssap.c:584 SUBSCR_CONN(conn1)[0x249298]{ACTIVE}: Global Call Ref IE of 0 bytes is too short <0010> ../../../git/src/osmo-bsc/lchan_fsm.c:80 lchan(0-0-1-SDCCH8-1)[0x1eb9c8]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout <0010> ../../../git/src/osmo-bsc/lchan_fsm.c:80 lchan(0-0-1-SDCCH8-2)[0x246e08]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout <0010> ../../../git/src/osmo-bsc/lchan_fsm.c:80 lchan(0-0-1-SDCCH8-3)[0x246f48]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout <0010> ../../../git/src/osmo-bsc/lchan_fsm.c:80 lchan(0-0-1-SDCCH8-4)[0x247088]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout <0000> ../../../git/src/libosmo-mgcp-client/mgcp_client_fsm.c:526 MGCP_CONN(to-MSC)[0x24a1f8]{ST_READY}: MGW/DLCX: abrupt FSM termination with connections still present, sending unconditional DLCX... <0000> ../../../git/src/libosmo-mgcp-client/mgcp_client_fsm.c:526 MGCP_CONN(to-BTS)[0x251a58]{ST_READY}: MGW/DLCX: abrupt FSM termination with connections still present, sending unconditional DLCX... <0010> ../../../git/src/osmo-bsc/abis_rsl.c:2018 lchan(0-0-2-TCH_F-0)[0x2475e0]{WAIT_RF_RELEASE_ACK}: (type=TCH_F) Rx IPACC DLCX IND After an investigation, it turns out that the BTS broadcasts wrong CCCH_CONF=1, i.e. combined CCCH and SDCCH instead of CCCH_CONF=0, i.e. none combined CCCH. Fixes: - The generation of SI3 looks for CCCH information in BTS->C0 timeslots configuration that have never been updated during parsing the BSC configuration file. - Properly update BTS->C0 timeslots configuration during parsing the BSC configuration file solves the issue. Change-Id: I33ea7808ac1bd064b88fd609bd7dfe0c8aa341f2 --- M src/osmo-bsc/bsc_vty.c 1 file changed, 4 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/09/15909/1 diff --git a/src/osmo-bsc/bsc_vty.c b/src/osmo-bsc/bsc_vty.c index a388c9a..6e02e06 100644 --- a/src/osmo-bsc/bsc_vty.c +++ b/src/osmo-bsc/bsc_vty.c @@ -4336,6 +4336,10 @@ ts->pchan_from_config = pchanc; + /* update BTS->C0 timeslot configuration so that CCCH_CONF in SI3 will be correctly generated */ + if (ts->trx == ts->trx->bts->c0) + ts->trx->bts->c0->ts[ts->nr].pchan_is = pchanc; + return CMD_SUCCESS; } -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/15909 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: I33ea7808ac1bd064b88fd609bd7dfe0c8aa341f2 Gerrit-Change-Number: 15909 Gerrit-PatchSet: 1 Gerrit-Owner: Minh-Quang Nguyen <minh-quang.nguyen at nutaq.com> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20191030/b0f0839e/attachment.htm>