hi harald,
as i am still working on RR MM and CC layer, it seems to be more complicated as i thought. remember all the messages in 04.08? but most problem is that i must first understand it all. i get more and more knowledge about it while reading it. i started implementing some parts, but most parts i do not understand yet. as i know from earlier project, it requires exact knowledge of every bit to do it right.
when i am finished, i will tell you as soon as possible, but i think it takes some more weeks. anyway, there will be many issues then. as i can see, there the layer 2 and layer 1 will also be not that easy too. e.g. layer 2 must process channel descriptions to connect to the right channel and the right configurations and mode. also when i am finished, i will need to solve some coding issues, like message flow, queueing (to prevent message loops), and structures for subscriber data, telephone settings and system informations. as soon i am finished, i will make a list of remaining unsolved issues.
and finally gsm 03.22 (selecting and changing cells) must also wants to be implemented.
if you like to be aware of what i am doing, just watch my code base. it is live, so every time i do a write, it will be available at: http://home.eversberg.eu/alpha3/
regards,
andreas
Hi Andreas,
thanks for your update.
On Mon, Mar 08, 2010 at 09:42:56AM +0100, Andreas.Eversberg wrote:
as i am still working on RR MM and CC layer, it seems to be more complicated as i thought. remember all the messages in 04.08? but most problem is that i must first understand it all. i get more and more knowledge about it while reading it. i started implementing some parts, but most parts i do not understand yet. as i know from earlier project, it requires exact knowledge of every bit to do it right.
Thanks for your status update. Of course, the full 04.08 is a lot of work, this is why I was hoping we can introduce your code gradually, step-by-step - rather than everything as one big merge.
when i am finished, i will tell you as soon as possible, but i think it takes some more weeks. anyway, there will be many issues then. as i can see, there the layer 2 and layer 1 will also be not that easy too. e.g. layer 2 must process channel descriptions to connect to the right channel and the right configurations and mode.
Sure. My development style is probably a bit different. Rather than trying to complete all of layer1 / layer2 before working on layer3, a minimal layer1/2 like we have now is already sufficient to test location updating or even things like SMS or call control.
and finally gsm 03.22 (selecting and changing cells) must also wants to be implemented.
if you like to be aware of what i am doing, just watch my code base. it is live, so every time i do a write, it will be available at: http://home.eversberg.eu/alpha3/
I've checked that code into our git repository (src/host/gsm48-andreas directory) and would appreciate if you could also start to work in the git repository. This makes teamwork much easier.
For example, as opposed to your latest 'alpha3' code, I have already moved all the gsm48_ie.c code (which was 80% identical with openbsc) into libosmocore, and removed it from gsm48-andreas and openbsc. All the encode_* and decode_* functions now have a gsm48_ prefix to make their naming more unique.
So feel free to work in that directory of git, you can commit directly to master, no need for a branch.
Also, there are other people (like Patrick McHardy) who have indicated that they would like to help on the L3... using one shared repository makes even more sense at this point.
Cheers, Harald
baseband-devel@lists.osmocom.org
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Andreas.Eversberg -
Harald Welte