Sv: 2G repeater/booster w/ osmocom-bb? or 3G w/ osmocom-bb?

Tomcsányi, Domonkos domi at tomcsanyi.net
Tue Jun 21 10:53:44 UTC 2016


Hi,

Those femtocells use ipsec to which the keys are not available (yet). The ones that were not automatically upgraded by Vodafone and therefore expose a serial shell might be used, but that requires some more investigation (and sadly not much of un-upgraded versions exists...also downgrading isn't an option if I'm correct because they do this inside the IPsec tunnel).

Maybe Kevin has more memories about them :).

Other femtocells (e.g. SFR) that use EAP-SIM should be easily connected to an open core network by simply using SIM cards with known keys.

Cheers,
Domi


2016. jún. 20. dátummal, 21:36 időpontban Erich Dachleger <edachleger at yahoo.com> írta:

> Does anybody know if it would be possible to use some of the old vodaphone-femtocells together with openbsc/osmo-bts?
> 
> Regards
> Erich
> 
> 
> Den Mandag, 23. mai 2016 11.46 skrev etienne . <etiennehelluy at gmail.com>:
> 
> 
> Short answer: no & no
> 1 - A gsm repeater is an analog device. With osmocom-bb phones you would need to demodulate/remodulate bursts.
> This will mess with timing advance, and you won't be able to send bursts in the same frame/timeslot they were received.
> 2 - Calypso don't/won't support 3G.
> 
> Regards
> 
> On Mon, May 23, 2016 at 4:21 PM, Craig Comstock <craig_comstock at yahoo.com> wrote:
> The place where I normally play with osmocom-bb has pretty bad 2G coverage and I was wondering if I could make a signal booster/repeater with a couple of osmocom phones?
> 
> Also wondering if 3G would require totally different hardware than the old Calypso motorola phones or if it could be achieved with firmware+DSP changes?
> 
> I have a 3G cell spot that boost that signal so just trying to find a way to make an osmocom-bb phone work well in my place.
> 
> Thanks,
> Craig
> 
> 
> 
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