LAC 0 / paging to all BTS

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Harald Welte laforge at gnumonks.org
Wed Sep 30 12:49:21 UTC 2009


Hi Zecke,

On Wed, Sep 30, 2009 at 01:37:42PM +0200, Holger Freyther wrote:
> On Wednesday 30 September 2009 13:23:10 Harald Welte wrote:
>
> > You are now redefiniing the LAC 0 to something like the opposite case,
> >  which I don't particularly like.  Is there some alternative solution?
> 
> I didn't think about the IMSI DETACH case. One easy alternative is to use the 
> other reserved lac value. With the least significant bit set 0 and all others 
> to 1 (so 0xfffe... ETSI always makes me unsure about it).

I think LAC = 0xfffe seems to be the way to go for paging of all BTS, wile
we keep LAC = 0 for the 'user is detached' case.

Regards,
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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