RFC 3241 (rfc3241) - Page 1 of 12
Robust Header Compression (ROHC) over PPP
Alternative Format: Original Text Document
Network Working Group C. Bormann
Request for Comments: 3241 TZI/Uni Bremen
Updates: 1332 April 2002
Category: Standards Track
Robust Header Compression (ROHC) over PPP
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 (2002). All Rights Reserved.
Abstract
This document describes an option for negotiating the use of robust
header compression (ROHC) on IP datagrams transmitted over the
Point-to-Point Protocol (PPP). It defines extensions to the PPP
Control Protocols for IPv4 and IPv6.
1. Introduction
Robust Header Compression (ROHC) as defined in [RFC 3095] may be used
for compression of both IPv4 and IPv6 datagrams or packets
encapsulated with multiple IP headers. The initial version of ROHC
focuses on compression of the packet headers in RTP streams, while
supporting compression of other UDP flows; however, it also defines a
framework into which further header compression mechanisms can be
plugged as new profiles. Planned additions to the set of profiles
supported by ROHC will be capable of compressing TCP transport
protocol headers as well.
In order to establish compression of IP datagrams sent over a PPP
link each end of the link must agree on a set of configuration
parameters for the compression. The process of negotiating link
parameters for network layer protocols is handled in PPP by a family
of network control protocols (NCPs). Since there are separate NCPs
for IPv4 and IPv6, this document defines configuration options to be
used in both NCPs to negotiate parameters for the compression scheme.
Bormann Standards Track