Good Evening,
this is a bit of speculation but Keith showed me a trace with some network
delay that makes a case for using FSM for the lchan itself.
It seems the following can happen:
* LU REJECT
* Start Channel Release
** Send RR Release to the MS
** Deactivate SACCH
** Start Timer
... network transmission issues... at least 5s
* SACCH deactivate timeout
** Start error release procedure..
...
* LATE RELEASE INDICATION arrives triggering other release procedure?
So with a proper FSM we would have transitioned into the error path and would
just ignore the RELEASE INDICATION. The question is if someone has budget to do
a FSM transition here? I will try to build a simulated testcase for that.
The other part that seems to happen (and I don't understand yet):
* Allocating a lchan before it is fully freed?!
* The BTS sending us RF Channel Releasse ACK twice
cheers
holger
