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

worley@ariadne.com (Dale R. Worley) Thu, 06 February 2014 19:21 UTC

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Date: Thu, 06 Feb 2014 14:14:57 -0500
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From: worley@ariadne.com
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To: Jim Forster <jim.forster@rangenetworks.com>
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Cc: dispatch@ietf.org
Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS
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It's certainly an interesting project.

It looks to me like you're looking for support in regard to which SIP
standards the user agent should support.  The best practices of
implementing SIP user agents, as it were.  If you are making an
organized project of this, I can see the value of clearly documenting
it.

> Use of SIP Re-invite for hand-over when a mobile phone moves from
> one BTS to a neighbor

In practice, I would expect INVITE-with-Replaces to be used for
handovers.  But I suspect that you haven't designed how to do
handovers yet.  That's going to be an interesting problem...

Dale

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