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rfc3096.Requirements for robust IP UDP RTP header compression

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Network Working Group M. Degermark, Editor Request for Comments: 3096 University of Arizona Category: Informational July 2001 Requirements for robust IP/UDP/RTP header compression

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard of any kind. Distribution of this

memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2001). All Rights Reserved. Abstract

This document contains requirements for robust IP/UDP/RTP (Internet

Protocol/User Datagram Protocol/Real-Time Transport Protocol) header compression to be developed by the ROHC (Robust Header Compression)

WG. It is based on the ROHC charter, discussions in the WG, the 3GPP document "3GPP TR 23.922", version 1.0.0 of October 1999, as well as contributions from 3G.IP.

1. Introduction

The goal of the ROHC WG is to develop header compression schemes that perform well over links with high error rates and long link round

trip times. The schemes must perform well for cellular links built

using technologies such as WCDMA, EDGE, and CDMA-2000. However, the schemes should also be applicable to other future link technologies

with high loss and long round trip times.

The following requirements have, more or less arbitrarily, been

divided into three groups. The first group deals with requirements

concerning the impact of an header compression scheme on the rest of the Internet infrastructure. The second group concerns what kind of headers that must be compressed efficiently. The final group

concerns efficiency requirements and requirements which stem from the properties of the anticipated link technologies.

2. Header compression requirements

Several current standardization efforts in the cellular arena aim at supporting voice over IP and other real-time services over IP, e.g., GERAN (specified by the ETSI SMG2 standards group), and UTRAN Degermark Informational [Page 1]

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