On Aug 13, 2008, at 9:03 AM, Bartłomiej Kołakowski wrote:
Hello,
I have got such concern regarding location conveyance in SIP
messages: I am designing IMS Appilcation Server, acting as a proxy,
that would query network elements for location information. As you
wrote proxies cannot insert message body, so the only way is to
provide location by reference. This requires appling SUBSCRIBE-
NOTIFY mechanism, which makes the architecture of the solution quit
complex.
In order to make it simpler I thought about including location
information as locationValue inside the Geolocation header. In fact
we do not need location represented with coordinates, but with cell-
id (that's mobile network). PIDF-LO does not support it, but maybe
inside a header that would be possible? There would be also an issue
in indicating loaction target whose location is included (we plan to
include both A and B parties location). Geolocation header would
look like this:
Geolocation: {cell-id-3gpp} ;location-target="[EMAIL PROTECTED]";inserted-
by="[EMAIL PROTECTED]"
What do you think about souch a usage of Geolocation header, maybe
you could give us some other solution?
have you looked at RC 3455? This defines IMS headers for cell-ID based
location.
--
Dean
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