Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

SDP: Session Description Protocol (RFC2327)

IP.com Disclosure Number: IPCOM000002894D
Original Publication Date: 1998-Apr-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 32 page(s) / 80K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Handley: AUTHOR [+2]

Abstract

This document defines the Session Description Protocol, SDP. SDP is intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 3% of the total text.

Network Working Group M. Handley

Request for Comments: 2327 V. Jacobson

Category: Standards Track ISI/LBNL

April 1998

SDP: Session Description Protocol

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 (1998). All Rights Reserved.

Abstract

This document defines the Session Description Protocol, SDP. SDP is

intended for describing multimedia sessions for the purposes of

session announcement, session invitation, and other forms of

multimedia session initiation.

This document is a product of the Multiparty Multimedia Session

Control (MMUSIC) working group of the Internet Engineering Task

Force. Comments are solicited and should be addressed to the working

group's mailing list at confctrl@isi.edu and/or the authors.

1. Introduction

On the Internet multicast backbone (Mbone), a session directory tool

is used to advertise multimedia conferences and communicate the

conference addresses and conference tool-specific information

necessary for participation. This document defines a session

description protocol for this purpose, and for general real-time

multimedia session description purposes. This memo does not describe

multicast address allocation or the distribution of SDP messages in

detail. These are described in accompanying memos. SDP is not

intended for negotiation of media encodings.

2. Background

The Mbone is the part of the internet that supports IP multicast, and

thus permits efficient many-to-many communication. It is used

extensively for multimedia conferencing. Such conferences usually

have the property that tight coordination of conference membership is

not necessary; to receive a conference, a user at an Mbone site only

has to know the conference's multicast group address and the UDP

ports for the conference data streams.

Session directories assist the advertisement of conference sessions

and communicate the relevant conference setup information to

prospective participants. SDP is designed to convey such information

to recipients. SDP is purely a format for session description - it