A Location Reference Event Package for the Session Initiation Protocol (SIP)

Document Type Expired Internet-Draft (individual)
Author Henning Schulzrinne 
Last updated 2006-10-19
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Mobile devices sometimes want to give temporary access to their presence and location information to third parties that may not have a trust relationship with their presence server. Also, in addition to other mechanisms, application-layer location configuration protocols are helpful in building location-based systems. This document describes a Session Initiation Protocol (SIP) event package, locationref, that periodically delivers randomized presence URLs to the target, which the target can then hand to call recipients and other parties.


Henning Schulzrinne (hgs+geopriv@cs.columbia.edu)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)