2009/6/25 Nordin <bouchtaoui@gmail.com>

No. It means the PDA might first try to register with that Dutch TMSI and then the network will need to explicitly request the IMSI. It's not supposed to use that Dutch TMSI in France, but it might try if there's a bug in its GSM stack.

Well I'm sorry, but I'm still not convinced about that. Cause that would be a major bug, which won't be accepted by the biggest user group for PDA phones (like business men, or presidents like Obama).

Ah. Sorry. You are probably correct then. There's something about the BCCH that the phone doesn't like.

That's I think is most likely the case.

That's part of what I mean by TMSI resolution: if you can't recognize or support the TMSI, turn around and request the IMSI.

Yeah, that is what OpenBSC does, I think. But Harald, Holger, Dieter and others know more about it.

The problem, sometimes, is that some phones don't drop the TMSI. They insist on using it, even when it should have been invalidated.

In that case, I would see some negotiations from the debug bsc_hack, which there is not. So my assumption is still some missing information in the BCCH channel. Cause once again, trying to register to my BTS manually failed and I don't see any attempt to do just a simple Radio Resource request. The latter one I can't confirm that for 100 %, because it's possible the debug doesn't show all of that.

The only way we could get the Treo 650 to stop sending us AT&T's old TMSI was to assign it one of our own.

Well, at least the Treo talked to you.

c u later...

Not if I c u first... ;-)

uhhhh....c u soon? :)