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The Session Initiation Protocol (SIP) UPDATE Method (RFC3311)

IP.com Disclosure Number: IPCOM000010040D
Original Publication Date: 2002-Oct-01
Included in the Prior Art Database: 2002-Oct-15
Document File: 14 page(s) / 28K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Rosenberg: AUTHOR

Abstract

This specification defines the new UPDATE method for the Session Initiation Protocol (SIP). UPDATE allows a client to update parameters of a session (such as the set of media streams and their codecs) but has no impact on the state of a dialog. In that sense, it is like a re-INVITE, but unlike re-INVITE, it can be sent before the initial INVITE has been completed. This makes it very useful for updating session parameters within early dialogs.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 9% of the total text.

Network Working Group                                       J. Rosenberg

Request for Comments: 3311                                   dynamicsoft

Category: Standards Track                                 September 2002

          The Session Initiation Protocol (SIP) UPDATE Method

Status of this Memo

   This document specifies an Internet standards track protocol for the

   Internet community, and requests discussion and suggestions for

   improvements.  Please refer to the current edition of the "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This specification defines the new UPDATE method for the Session

   Initiation Protocol (SIP).  UPDATE allows a client to update

   parameters of a session (such as the set of media streams and their

   codecs) but has no impact on the state of a dialog.  In that sense,

   it is like a re-INVITE, but unlike re-INVITE, it can be sent before

   the initial INVITE has been completed.  This makes it very useful for

   updating session parameters within early dialogs.

Rosenberg                   Standards Track                     [Page 1]

RFC 3311                   SIP UPDATE Method              September 2002

Table of Contents

   1    Introduction ..............................................    2

   2    Terminology ...............................................    3

   3    Overview of Operation .....................................    3

   4    Determining Support for this Extension ....................    3

   5    UPDATE Handling ...........................................    4

   5.1  Sending an UPDATE .........................................    4

   5.2  Receiving an UPDATE .......................................    5

   5.3  Processing the UPDATE Response ............................    6

   6    Proxy Behavior ............................................    7

   7    Definition of the UPDATE method ...........................    7

   8    Example Call Flow .........................................    7

   9    Security Considerations ...................................   11

   10   IANA Considerations .......................................   11

   11   Notice Regarding Intellectual Property Rights .............   11

   12   Normative References ......................................   11

   13   Acknowledgements ..........................................   12

   14   Author's Address ..........................................   12

   15   Full Copyright Statement ..................................   13

1 Introduction

   The Session Initiation...