[sipcore] I-D Action: draft-ietf-sipcore-rfc4028bis-04.txt

internet-drafts@ietf.org Wed, 13 January 2021 15:45 UTC

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Subject: [sipcore] I-D Action: draft-ietf-sipcore-rfc4028bis-04.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Session Initiation Protocol Core WG of the IETF.

        Title           : Session Timers in the Session Initiation Protocol (SIP)
        Authors         : Christer Holmberg
                          Steve Donovan
                          Jonathan Rosenberg
	Filename        : draft-ietf-sipcore-rfc4028bis-04.txt
	Pages           : 26
	Date            : 2021-01-13

   This document defines an extension to the Session Initiation Protocol
   (SIP).  This extension allows for a periodic refresh of SIP sessions
   through a re-INVITE or UPDATE request.  The refresh allows both user
   agents and proxies to determine whether the SIP session is still
   active.  The extension defines two new header fields: Session-
   Expires, which conveys the lifetime of the session, and Min-SE, which
   conveys the minimum allowed value for the session timer.

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