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Reliability of Provisional Responses in Session Initiation Protocol (SIP) (RFC3262)

IP.com Disclosure Number: IPCOM000009157D
Original Publication Date: 2002-Jun-01
Included in the Prior Art Database: 2002-Aug-12
Document File: 15 page(s) / 30K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

jdrosen@dynamicsoft.com: AUTHOR [+2]

Abstract

This document specifies an extension to the Session Initiation Protocol (SIP) providing reliable provisional response messages. This extension uses the option tag 100rel and defines the Provisional Response ACKnowledgement (PRACK) method.

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: 3262                                   dynamicsoft

Category: Standards Track                                 H. Schulzrinne

                                                             Columbia U.

                                                               June 2002

                 Reliability of Provisional Responses

               in the Session Initiation Protocol (SIP)

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 document specifies an extension to the Session Initiation

   Protocol (SIP) providing reliable provisional response messages.

   This extension uses the option tag 100rel and defines the Provisional

   Response ACKnowledgement (PRACK) method.

Table of Contents

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

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

   3     UAS Behavior ........................................    3

   4     UAC Behavior ........................................    6

   5     The Offer/Answer Model and PRACK ....................    9

   6     Definition of the PRACK Method ......................   10

   7     Header Field Definitions ............................   10

   7.1   RSeq ................................................   10

   7.2   RAck ................................................   11

   8     IANA Considerations .................................   11

   8.1   IANA Registration of the 100rel Option Tag ..........   11

   8.2   IANA Registration of RSeq and RAck Headers ..........   12

   9     Security Considerations .............................   12

   10    Collected BNF .......................................   12

   11    Acknowledgements ....................................   12

   12    Normative References ................................   13

   13    Informative References ..............................   13

Rosenberg & Schulzrinne     Standards Track                     [Page 1]

RFC 3262      Reliability of Provisional Responses in SIP      June 2002

   14    Authors' Addresses ..................................   13

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