Session Timers in the Session Initiation Protocol
RFC 4028, “Session Timers in the Session Initiation Protocol”, is a Proposed Standard document published in May 2005 by S. Donovan, J. Rosenberg. The canonical text is published by the RFC Editor.
Abstract
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. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 4028 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4027 Domain Name System Media Types
- RFC 4029 Scenarios and Analysis for Introducing IPv6 into ISP Networks
- RFC 4026 Provider Provisioned Virtual Private Network Terminology
- RFC 4030 The Authentication Suboption for the Dynamic Host Configuration Protocol Relay Agent Option
- RFC 4025 A Method for Storing IPsec Keying Material in DNS
- RFC 4031 Service Requirements for Layer 3 Provider Provisioned Virtual Private Networks
- RFC 4024 Voice Messaging Client Behaviour
- RFC 4032 Update to the Session Initiation Protocol Preconditions Framework