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Bug #5172

closed

Uplink is broken: wrong TSC is sent in RSL CHANnel ACTIVation

Added by fixeria 8 months ago. Updated 8 months ago.

Status:
Resolved
Priority:
Urgent
Assignee:
Category:
-
Target version:
-
Start date:
06/04/2021
Due date:
% Done:

100%

Spec Reference:

Description

With the recent master (https://git.osmocom.org/osmo-bsc/commit/?id=3512e3cf1b7fd16dbb476d5abf2eb9c13dcc876e) none of my phones can perform Location Updating. Access Burst still triggers SDCCH activation, but after that I see no RSL DATA.ind at all. The Uplink measurements (performed by BTS) indicate that the MS does transmit on allocated resource.

DRSL INFO abis_rsl.c:1547 (bts=0) CHAN RQD: reason: Location updating (ra=0x05, neci=0x01, chreq_reason=0x03)
DRLL DEBUG lchan_select.c:91 looking for lchan SDCCH8: (bts=0,trx=0,ts=1,pchan=SDCCH8,state=UNUSED) ss=0 is available
DRLL DEBUG lchan_select.c:269 (bts=0) lchan_select_by_type(SDCCH)
DRSL DEBUG abis_rsl.c:517 (bts=0,trx=0,ts=1,pchan=SDCCH8,state=IN_USE) Tx RSL Channel Activate with act_type=INITIAL
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=1 meas_rep_last_seen_nr=0
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=2 meas_rep_last_seen_nr=1
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=3 meas_rep_last_seen_nr=2
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=4 meas_rep_last_seen_nr=3
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=5 meas_rep_last_seen_nr=4
DRLL DEBUG chan_alloc.c:231 (bts=0) channel load average is 3.03%
DRLL DEBUG chan_alloc.c:245 (bts=0) T3122 wait indicator set to 10 seconds
DRSL DEBUG abis_rsl.c:1169 (bts=0,trx=0,ts=1,ss=0): meas_rep_count++=6 meas_rep_last_seen_nr=5
DCHAN ERROR lchan_fsm.c:1649 lchan(0-0-1-SDCCH8-0)[0x55c95c66b480]{WAIT_RLL_RTP_ESTABLISH}: (type=SDCCH) lchan allocation failed in state WAIT_RLL_RTP_ESTABLISH: Timeout

Related issues

Blocks OsmoBSC - Feature #1866: Make use of RSL RF RESOURCE INDICATION (interference measurements)Resolvedneels12/02/2016

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