After auto releasing a channel the next paging request will
not be immediately answered. The hypothesis was that we do
not release the channel properly. Implementing Channel Release
of GSM 04.08 should have fixed it, but it didn't. According
to the wireshark dissectors the message is correct though.
- Add the RR cause values to gsm_04_08.
- Implement the Channel Release message
- Invoke the release channel function before deallocating
the lchan.
There is a 1:1 relationship between gsm_bts and the paging
operation. Move the paging state into the gsm_bts which is
simplfying the code a lot. This was hinted by LaF0rge.
(I'm not happy with the names of the structs)
In our setup (1xCCCH combined, BS_AG_BLKS_RES=0,
BS_PA_MFRMS=0x3 -> 5) we have MAX(1,3-0) * 5 paging
sub-channels. Using this 15 I was able to successfully page
my phone/IMSI (934%15 -> 4).
My confusion is coming from the terms used for paging throughout
the documentation. GSM05.02 6.5.2 talks about "N = number of
paging blocks 'available' on one CCCH = (number of paging blocks
'available' in a 51-multiframe on one CCCH)xBS_PA_MFRMS" which
is already misguiding and GSM04.08 is talking about number of
different paging subchannels on the CCCH and is providing a
formula.
I deduct that N == number of different paging subchannels on the CCCH
as of GSM04.08 and will simply test this with different IMSIs and
see if I can page them as well.
- The paging block calculation is wrong but I have a hard time finding
the right information. The table of 05.02 (Table 5 of 9) looks good
but my phone is not happy with that group...
- Initialize Control Channel Description of SI3
- Patch the table
- Setting ATT now is easy
- Paging can now extract all required information... to determine
the right paging group.
For finding the right paging group one needs to know various
settings that are broadcasted as part of system settings 3. This
includes the CCCH Conf, the BS_PA_MFRMS, BS_AG_BLKS_RES.... The
next step will be to move away from the hardcoded System Settings 3
so one can calculate the paging group...
* new abis_nm_bs11_bsc_disconnect() function to disconnect BSC/BTS link
* add support for 'forced load' of BS-11 software to abis_nm.c and bs11_config
* remove lots of debug output
* print progress during software load
* add more BS11 specific attributes
* define all valid BS11 PA power classes
* add callback function to software load
* introduce SWL load function for BS-11 style SWL file lists
* separate activation of software from loading of software
* add function to obtain BS-11 serial number
* disable serial port POST processing
* default delay is 0
* make window size user-configurable (default: 8)
* add missing help line for the --delay option
* don't forget to create the CCLK object as part of minimal config
Harald Welte
Holger Freyther