osmo-bts-trx init problem

[Harald Welte]

Hi!

On Sat, Dec 02, 2017 at 10:31:57PM +0300, GSK MOSS wrote:
> <0004> abis_rsl.c:1922 (bts=0,trx=0,ts=2,ss=0) Activating ARFCN(60) SS(0)
> lctype TCH_F r=OTHER ra=0x57 ta=38
> <0004> abis_rsl.c:595 (bts=0,trx=0,ts=2,pchan=TCH/F) Tx RSL Channel
> Activate with act_type=INITIAL
> <0004> abis_rsl.c:1231 (bts=0,trx=0,ts=2,ss=0) state NONE -> ACTIVATION
> REQUESTED
> <0004> abis_rsl.c:1603 (bts=0,trx=0,ts=2,ss=0) CHANNEL ACTIVATE ACK
> <0004> abis_rsl.c:1231 (bts=0,trx=0,ts=2,ss=0) state ACTIVATION REQUESTED
> -> ACTIVE
> <0004> abis_rsl.c:1721 (bts=0,trx=0,ts=2,ss=0) T3101 expired: no response
> to IMMEDIATE ASSIGN
> <0004> abis_rsl.c:867 (bts=0,trx=0,ts=2,ss=0) RF Channel Release due to
> error: 1

The above log is telling you that the BTS+BSC have activated the radio channel
on the BTS side and send the MS an IMMEDIATE ASSIGN command.  However, the phone
never established LAPDm (Layer2) on that channel.  Usual causes for this error
are insufficient power budget / too high path loss on the RF link.

-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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