RFC 3096 (rfc3096) - Page 1 of 8

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
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