CalypsoBTS no sync, ms hang

Anton Gorbachev antgorka at gmail.com
Fri May 5 20:35:54 UTC 2017


Dear developers,

Sorry for the previous question.

I found that the solution is simple. The bug described here
http://cgit.osmocom.org/osmocom-bb/commit/?id=a903b3c1ee27047c79728b18ff6340d23d1aad2e

isn't fixed in branch jolly/testing I am using for calypsoBTS.
So all I needed is just implement the fix and recompile from sources.

Kind regards,
Anton


2017-05-05 17:52 GMT+03:00 Anton Gorbachev <antgorka at gmail.com>:

> Dear colleagues,
>
> I am trying to setup CalypsoBTS with two c113 phones.
>
> Don't you know why can't I sync to any commercial cell with transceiver
> from branch jolly/testing?
>
> What I have:
> Motorola c113 and c113a, tried both.
> All other apps like, RSSI, mobile, ccch_scan works like a charm.
>
> What I am doing:
> Built jolly/testing according to maual
> https://osmocom.org/projects/baseband/wiki/CalypsoBTS
>
> Load firmware
> ./osmocon -r 99 -m c123xor -p /dev/ttyUSB0 -c ../../target/firmware/board/
> compal_e88/trx.highram.bin
>
> Found several strongest cells with RSSI and cell_log.
> Trying to sync:
> ./transceiver -a 50 -r 99 -e 1
> Here is the log:
> 50
> 41
> 1
> <000c> l1ctl.c:77 Tx Reset Req (1)
> <000c> l1ctl_link.c:171 Sending: '0d 00 00 00 01 00 00 00 '
> <0012> l1ctl.c:383 Reset received: Starting sync.
> <000c> l1ctl.c:95 Sync Req
> <000c> l1ctl_link.c:171 Sending: '01 00 00 00 00 32 00 64 27 10 03 20 03
> 07 00 00 00 '
>
> After that phone hangs, no reaction in osmocon on key pressures, holding
> on power off button...
>
> The last messages are:
> L1CTL_RESET_REQ: FULL!L1CTL_FBSB_REQ (arfcn=50, flags=0x7)
> Starting FCCH RecognitionFB0 (2515:4): TOA= 3552, Power= -64dBm, Angle=
> 1328Hz
> FB1 (2525:8): TOA= 8543, Power= -64dBm, Angle=  114Hz
>   fn_offset=2523 (fn=2525 + attempt=8 + ntdma = 6)
>   delay=8 (fn_offset=2523 + 11 - fn=2525 - 1
>   scheduling next FB/SB detection task with delay 8
> =>FB @ FNR 2523 fn_offset=2523 qbits=3988
> Synchronize_TDMA
> LOST 3398!
>
> I tried different cells, maybe I need to wait some time to warm the
> crystal? But can it be so important?
>
> Kind regards,
> Anton
>
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