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The Early Session Disposition Type for the Session Initiation Protocol (SIP) (RFC3959)

IP.com Disclosure Number: IPCOM000033609D
Original Publication Date: 2004-Dec-01
Included in the Prior Art Database: 2004-Dec-18
Document File: 12 page(s) / 22K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Camarillo: AUTHOR

Abstract

This document defines a new disposition type (early-session) for the Content-Disposition header field in the Session Initiation Protocol (SIP). The treatment of "early-session" bodies is similar to the treatment of "session" bodies. That is, they follow the offer/answer model. Their only difference is that session descriptions whose disposition type is "early-session" are used to establish early media sessions within early dialogs, as opposed to regular sessions within regular dialogs.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 12% of the total text.

Network Working Group                                       G. Camarillo

Request for Comments: 3959                                      Ericsson

Category: Standards Track                                  December 2004

                The Early Session Disposition Type for

                 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 (2004).

Abstract

   This document defines a new disposition type (early-session) for the

   Content-Disposition header field in the Session Initiation Protocol

   (SIP).  The treatment of "early-session" bodies is similar to the

   treatment of "session" bodies.  That is, they follow the offer/answer

   model.  Their only difference is that session descriptions whose

   disposition type is "early-session" are used to establish early media

   sessions within early dialogs, as opposed to regular sessions within

   regular dialogs.

Table of Contents

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

   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  2

   3.  Issues Related to Early Media Session Establishment  . . . . .  2

   4.  The Early Session Disposition Type . . . . . . . . . . . . . .  4

   5.  Preconditions  . . . . . . . . . . . . . . . . . . . . . . . .  4

   6.  Option tag . . . . . . . . . . . . . . . . . . . . . . . . . .  5

   7.  Example  . . . . . . . . . . . . . . . . . . . . . . . . . . .  5

   8.  Security Considerations  . . . . . . . . . . . . . . . . . . .  7

   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  8

   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  9

   11. References . . . . . . . . . . . . . . . . . . . . . . . . . .  9

       11.1. Normative References . . . . . . . . . . . . . . . . . .  9

       11.2. Informational References . . . . . . . . . . . . . . . .  9

       Author's Address . . . . . . . . . . . . . . . . . . . . . . . 10

       Full Copyright Statement . . . . . . . . . . . . . . . . . . . 11

Camarillo                   Standards Track                     [Page 1]

RFC 3959             Early Session Disposition Type        December 2004

1.  Introduction

   Early media refers to media (e.g., audio and video) that is exchanged

   before a particular session is accepted by t...