virtphy and MT SMS

[Keith Whyte]

Hi all!

I just installed and configured osmo-bts-virtual and osmocom-bb with
virtphy.

Let me say - this is brilliant! It's so easy to do such things as
trigger IMSI Attach and Detach - so much easier than entering and
exiting airplane mode or power off/on.

Also, MO sms is a breeze.. I have a script to inject SMS regularly, so I
don't have to turn to the mobile and press buttons with each code change
in my SMS handler, I just make the change and wait for the next SMS to
hit it!

So thanks so much to those responsible for making this happen!

Now, one thing that is failing badly for me right "out-of-the-box" is MT
SMS.

As I am totally new to the osmocom-bb code, I guess the best would be a
ticket with some pcaps, but I thought I would ask first if it is a known
issue?

Basically, BSC is doing this:

DLSMS <0024> gsm_04_11.c:127 GSM4.11 TX [HEX of msg redacted]
DLSMS <0024> gsm0411_smc.c:247 SMC(954) TC1* timeout, retrying...

while on the mobile side:

<0005> gsm48_mm.c:3909 (ms 1) Received 'RR_EST_IND' from RR in state MM
idle (sapi 0)
<0005> gsm48_mm.c:912 new state MM IDLE, normal service -> wait for
network command

Then this repeats:

<0001> gsm48_rr.c:4775 Indicated ta 0 (actual ta 0)
<0001> gsm48_rr.c:4777 Indicated tx_power 19
<0001> gsm48_rr.c:4799 ACCH message type 0x00 unknown.
<0001> gsm48_rr.c:664 MON: f=56 lev=>=-47 snr= 0 ber= 63 LAI=262 42 0001
ID=0000 TA=0 pwr=19 TS=1/1
<0001> gsm48_rr.c:2866 MEAS REP: pwr=19 TA=0 meas-invalid=0
rxlev-full=-47 rxlev-sub=-47 rxqual-full=0 rxqual-sub=0 dtx 0 ba 0
no-ncell-n 7
<0001> gsm48_rr.c:2161 PAGING ignored, we are not camping.