The RObust Header Compression (ROHC) Framework
RFC 5795
| Document | Type |
RFC - Proposed Standard
(March 2010; Errata)
Obsoletes RFC 4995
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-sandlund-rohc-rfc4995bis | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 5795 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Magnus Westerlund | ||
| Send notices to | ghyslain@live.se | ||
Internet Engineering Task Force (IETF) K. Sandlund
Request for Comments: 5795 G. Pelletier
Obsoletes: 4995 Ericsson
Category: Standards Track L-E. Jonsson
ISSN: 2070-1721 March 2010
The RObust Header Compression (ROHC) Framework
Abstract
The Robust Header Compression (ROHC) protocol provides an efficient,
flexible, and future-proof header compression concept. It is
designed to operate efficiently and robustly over various link
technologies with different characteristics.
The ROHC framework, along with a set of compression profiles, was
initially defined in RFC 3095. To improve and simplify the ROHC
specifications, this document explicitly defines the ROHC framework
and the profile for uncompressed separately. More specifically, the
definition of the framework does not modify or update the definition
of the framework specified by RFC 3095.
This specification obsoletes RFC 4995. It fixes one interoperability
issue that was erroneously introduced in RFC 4995, and adds some
minor clarifications.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc5795.
Sandlund, et al. Standards Track [Page 1]
RFC 5795 ROHC Framework March 2010
Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2. ROHC Terminology . . . . . . . . . . . . . . . . . . . . . 5
3. Background (Informative) . . . . . . . . . . . . . . . . . . . 8
3.1. Header Compression Fundamentals . . . . . . . . . . . . . 8
3.2. A Short History of Header Compression . . . . . . . . . . 9
4. Overview of ROHC (Informative) . . . . . . . . . . . . . . . . 10
4.1. General Principles . . . . . . . . . . . . . . . . . . . . 10
4.2. Compression Efficiency, Robustness, and Transparency . . . 11
4.3. Developing the ROHC Protocol . . . . . . . . . . . . . . . 12
4.4. Operational Characteristics of the ROHC Channel . . . . . 13
4.5. Compression and Master Sequence Number (MSN) . . . . . . . 14
4.6. Static and Dynamic Parts of a Context . . . . . . . . . . 15
5. The ROHC Framework (Normative) . . . . . . . . . . . . . . . . 15
5.1. The ROHC Channel . . . . . . . . . . . . . . . . . . . . . 15
5.1.1. Contexts and Context Identifiers . . . . . . . . . . . 15
5.1.2. Per-Channel Parameters . . . . . . . . . . . . . . . . 16
5.1.3. Persistence of Decompressor Contexts . . . . . . . . . 17
Sandlund, et al. Standards Track [Page 2]
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