Thanks for your response Harald, Well I read in the mailinglist with the title: BS-11 runs, but no Network on my Mobile, date: Thu Apr 2 18:03:24 CEST 2009 about modifying the TRX power for the BS-11, so I could try that too for the ip.acces? Isn't it a bad idea to add abis_nm_bs11_set_trx_power(&bts->trx[0], BS11_TRX_POWER_GSM_250mW); in the bootstrap sequence? It won't harm if one tries right? Harald Welte schreef:

On Wed, Jun 03, 2009 at 05:48:12PM +0200, Nordin wrote: go ahead and try, but I would bet on just about anything that it does not work. Those are vendor-specific proprietary extensions of 12.21. Values defined by Siemens have no significance whatsoever for ip.access -- - 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)

On Wed, Jun 03, 2009 at 10:40:18PM +0200, Nordin Bouchtaoui wrote: There is certainly no way to 'boost' the power from the nanoBTS, since it is specified to something like 250mW max output power. The BS-11 has 3W max output. That's quite obvious if you understand the details of the cell selection algorithm. If you've been registered to an actual cell of the operator before, then that ARFCN/LAC is stored on the SIM card even when you shut off the phone. So the phone will first try to register to that cell again before scanning the entire band. of course. The BTS only sends numeric ID's in the BCCH. Only _after_ you register, the BTS (well, actually the BSC) sends a MM INFO message with the string-name of the network. So yes, typically the translation of mcc/mnc happens in a table on the SIM card, and if that fails in a table that is included at compile time into the GSM firmware of the handset. -- - 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)

Hi, Another thing: if your mobile phone is set to auto it will always register on its home network (if available) even if the signal of your basestation is far stronger. Roch. Nordin wrote: -- Roch-Alexandre Nominé CTO On-Waves ehf Armuli 25, IS-108, Reykjavik, Iceland Tel: +354 864 9431

Hi Nordin, The Sim card contains the MCC/MNC of your home network (along with a list of preferred and banned networks). Roch. Nordin wrote: -- Roch-Alexandre Nominé CTO On-Waves ehf Armuli 25, IS-108, Reykjavik, Iceland Tel: +354 864 9431

Harald Welte schreef: Yes, that's obvious. But if my BTS has the same ARFCN, besides the MCC and the MNC, as the mobile has tuned to, than it's possible that the mobile tries to register to my BTS. That's why I think our gsm-module (gsm for our servers) automatically tries to register to my BTS. A nice detail, after 4 times, the gsm-module stops trying to register to our BTS. I guess, that's an algorithm (maybe vendor-specific), to search for other available channels (ARFCNs).

On Thursday 04 June 2009 13:45:36 Nordin wrote: Yes, this would be intresting. If you could hack your sim preferred ROAMing list and the home network, then it would always pick your own BTS when you're close it? I'm afraid that sounds bit too good to be possible. Tuju -- Better to have one, and not need it, than to need one and not have it.

Hello guys, Antoher interesting thing I found, is when trying to force the mobile to register to the nanoBTS by simulating a commecrial provider, the classic mobilephones like a Nokia 6230, 6310i or a Siemens MC 60 do register to the nanoBTS. But PocketPCs like the HTCs (artemis, Diamond Touch, Qtek9090 and others of the same factory) just loses its signal or refuses to change bts. I haven't tested more mobilephones yet, but it's a bit strange that untill now it's succesful with normal mobilephones, but not with PDAs with integrated gsm module. Maybe the PDAs also checks for the availability of GPRS before registering to the BTS? I don't know if that kind of information is provided in the Broadcast channel (BCCH). I'll check it out. regards, Nordin.