Browse Prior Art Database

RTP: A Transport Protocol for Real-Time Applications (RFC3550)

IP.com Disclosure Number: IPCOM000018625D
Original Publication Date: 2003-Jul-01
Included in the Prior Art Database: 2003-Jul-29

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Schulzrinne: AUTHOR [+4]

Abstract

This memorandum describes RTP, the real-time transport protocol. RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video or simulation data, over multicast or unicast network services. RTP does not address resource reservation and does not guarantee quality-of-service for real-time services. The data transport is augmented by a control protocol (RTCP) to allow monitoring of the data delivery in a manner scalable to large multicast networks, and to provide minimal control and identification functionality. RTP and RTCP are designed to be independent of the underlying transport and network layers. The protocol supports the use of RTP-level translators and mixers.

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Network Working Group                                     H. Schulzrinne

Request for Comments: 3550                           Columbia University

Obsoletes: 1889                                               S.  Casner

Category: Standards Track                                  Packet Design

                                                            R. Frederick

                                                  Blue Coat Systems Inc.

                                                             V. Jacobson

                                                           Packet Design

                                                               July 2003

          RTP: A Transport Protocol for Real-Time Applications

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 (2003).  All Rights Reserved.

Abstract

   This memorandum describes RTP, the real-time transport protocol.  RTP

   provides end-to-end network transport functions suitable for

   applications transmitting real-time data, such as audio, video or

   simulation data, over multicast or unicast network services.  RTP

   does not address resource reservation and does not guarantee

   quality-of-service for real-time services.  The data transport is

   augmented by a control protocol (RTCP) to allow monitoring of the

   data delivery in a manner scalable to large multicast networks, and

   to provide minimal control and identification functionality.  RTP and

   RTCP are designed to be independent of the underlying transport and

   network layers.  The protocol supports the use of RTP-level

   translators and mixers.

   Most of the text in this memorandum is identical to RFC 1889 which it

   obsoletes.  There are no changes in the packet formats on the wire,

   only changes to the rules and algorithms governing how the protocol

   is used.  The biggest change is an enhancement to the scalable timer

   algorithm for calculating when to send RTCP packets in order to

   minimize transmission in excess of the intended rate when many

   participants join a session simultaneously.

Schulzrinne, et al.         Standards Track                     [Page 1]

RFC 3550...