Re: [dispatch] SIP and GSM/UMTS with OpenBTS

"DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com> Mon, 10 February 2014 17:56 UTC

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From: "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>
To: Jim Forster <jim.forster@rangenetworks.com>, Mary Barnes <mary.ietf.barnes@gmail.com>
Thread-Topic: [dispatch] SIP and GSM/UMTS with OpenBTS
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Date: Mon, 10 Feb 2014 17:56:40 +0000
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Cc: "dispatch@ietf.org" <dispatch@ietf.org>
Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS
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If I follow this diagram correctly, you claim to have collapsed the HLR into your BTS. Your BTS apparently have no communication shown with each other. This means you each subscriber is limited to a single BTS with no roaming between them.

To sumamrise, this diagram tells us nothing about what you want to do with your architecture, unless you really want no service capabilities at all.

Can you please start answering some of the questions I asked earlier.

Keith Drage
 

> -----Original Message-----
> From: dispatch [mailto:dispatch-bounces@ietf.org] On Behalf 
> Of Jim Forster
> Sent: 10 February 2014 04:35
> To: Mary Barnes
> Cc: dispatch@ietf.org
> Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS
> 
> On Feb 6, 2014, at 8:46 AM, Jim Forster 
> <jim.forster@rangenetworks.com> wrote:
> 
> >> 
> >> I think it would really help if there were some diagrams 
> showing what IMS protocols are being used.
> > 
> > Well, I can certainly provide some diagrams that show how 
> the system works.
> 
> Much delayed; apologies.  It's a bit simplified, and where it 
> calls out Asterix, one should read "any SIP switching module".
> 
> For those of you that are inclined to read code, it's all 
> available, as well as web site, mailing list, and wiki.  
> OpenBTS.org, openbts-discuss@lists.sourceforge.net, 
> https://wush.net/trac/rangepublic.  We plan on bringing a Dev 
> Kit and can demo somewhere.
> 
> 
>   -- Jim
> 
>