I-D ACTION:draft-rosenberg-sipping-lease-00.txt

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	Title		: URI Leasing in the Session Initiation Protocol (SIP)
	Author(s)	: J. Rosenberg
	Filename	: draft-rosenberg-sipping-lease-00.txt
	Pages		: 23
	Date		: 2003-2-12
	
Several applications of the Session Initiation Protocol (SIP) require
a user agent (UA) to construct and distribute a URI which can be used
by anyone on the Internet to route a call to that specific UA
instance.  An example of such an application is call transfer, based
on the REFER method.  To date, a variety of techniques have been
proposed for the contruction of such URI.  All of them have fatal
drawbacks.  This document proposes that the problem is actually one
of URI leasing - a feature whereby a UA can dynamically request the
creation of an address-of-record (AOR) within a domain.  Requirements
for a URI leasing mechanism are outlined.

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