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

worley@ariadne.com (Dale R. Worley) Wed, 12 February 2014 16:03 UTC

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From: worley@ariadne.com
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To: Tim Panton new <thp@westhawk.co.uk>
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Cc: dispatch@ietf.org
Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS
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> From: Tim Panton new <thp@westhawk.co.uk>

> Here is an interesting presentation by Kurtis that will give you
> some feel for what these systems do:
> 
> https://www.usenix.org/conference/nsdi13/technical-sessions/presentation/heimurl

Though he's incorrect that the first cellular network was in 1991, it
was in 1979.  1991 is the first GSM cellular network.

> It isn't directly related to the standardisation effort but is a
> great background info.

It's interesting work, but I don't see its connection with SIP at all.

My assumption is that you're asking, "How do we mate the GSM
over-the-air protocol with SIP for backhaul?", that is, how do we
disconnect the cellular system from IMS and all that.  But if your
goal is to deploy base stations commercially, you're going to need the
call accounting infrastructure of IMS.

Dale

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