Re: [Openbts-discuss] A second beacon with combination V

[Ben W. <bwo...@gm...>]

Nghia,

David is 100% right here.  Channel combination V is only allowed on C0T0.
The fact that you have put this on C0T4 will probably cause mobiles to think
that the "second carrier" is actually C0T0.  Therefore I would be suprised
if a mobile would actually be able to complete registration on this "second
carrier".

As David said, if two networks use the same ARFCN, they will most likely be
seperated by some physical distance and if not they would heavily interfere
with each other.

Ben
On Jul 10, 2011 3:54 PM, "Nghia Phan" <ngh...@gm...> wrote:
> Thanks David.
> I understand this is out of spec. This is purely experimental.
>
> The fact that the mobile does "see" the 2 beacons (which are 3 timeslots
> apart) means that -in my case- there are no radio interference, right?
> I actually got 2 mobiles to camp each on a different beacon at the same
> time.
> But I really don't understand what seems to be a behavioural difference
> between the 2 beacons.
>
> Even more strange: I put a mobile with a test SIM (programed with 001-01)
> and it camped couple of times on 001-02. I thought it should have
preferably
> camped onto 001-01.
>
> Any idea?
>
> -----Original Message-----
> From: da...@ra... [mailto:da...@ra...]
> Sent: Sunday, July 10, 2011 10:37 PM
> To: nghia phan; Openbts List
> Subject: Re: [Openbts-discuss] A second beacon with combination V
>
> What you are doing is completely outside the spec. The response of a
handset
> to this signal is not defined, but I have no explanation for why one
beacon
> would be treated differently from the other.
>
> In the real world, if two operators run on the same ARFCN, there will be
an
> overlap area where neither signal is usable due to radio interference. The
> solution is cross-border frequency coordination. There are also guidelines
> in the spec concerning NCC allocations in border areas.
>
> Sent from my Verizon Wireless BlackBerry
>
> -----Original Message-----
> From: nghia phan <ngh...@gm...>
> Date: Sun, 10 Jul 2011 22:21:31
> To: Openbts List<ope...@li...>
> Subject: [Openbts-discuss] A second beacon with combination V
>
>
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> All of the data generated in your IT infrastructure is seriously valuable.
> Why? It contains a definitive record of application performance, security
> threats, fraudulent activity, and more. Splunk takes this data and makes
> sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2d-c2
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