Re: HAR2009 TODO: USe both TRX with BS-11

On Thu, Jul 23, 2009 at 12:26:14AM +0200, Harald Welte wrote: Since I didn't proceed much on the Multidrop issue yesterday, I spent a bit of time investigating this. I have fixed two minor bugs in bsc_hack regarding the setup of TRX1, but now both TRX become live. I've also twisted the channel allocator to first use+exhaust TRX1 before going to TRX0 timeslots. What's weird is that the first allocated channel (TRX1/TS0) is not useable, with the following behaviour: * we see a channel request on the RACH * we assign TRX1/TS0 on the AGCH * we activate the channel on the BTS * we see the CM Service request from the MS on the TRX1/TS0 * we send the CM Service Ack from the BTS to the MS on TRX1/TS0 * after some time, T200 of the Um interface expires and the phone gives up. So it seems the CM Service ACK is never received by the phone. I have verified the TRX1/TS0 channel configuration is TCH/Full in LMT I have verified the CM Service ACK is transmitted to the correct GSM channel by usign the MA-10 protocol analyzer. This is really weird. For Timeslot 1 and higher, everything is working fine. I've reviewed the relevant code sections, and there is no special treetment of TS0 on any TRX that is != C0. (trx0). Any ideas? -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)