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RObust Header Compression (ROHC): Terminology and Channel Mapping Examples (RFC3759)

IP.com Disclosure Number: IPCOM000028055D
Original Publication Date: 2004-Apr-01
Included in the Prior Art Database: 2004-Apr-22
Document File: 21 page(s) / 50K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

L-E. Jonsson: AUTHOR

Abstract

This document aims to clarify terms and concepts presented in RFC 3095. RFC 3095 defines a Proposed Standard framework with profiles for RObust Header Compression (ROHC). The standard introduces various concepts which might be difficult to understand and especially to relate correctly to the surrounding environments where header compression may be used. This document aims at clarifying these aspects of ROHC, discussing terms such as ROHC instances, ROHC channels, ROHC feedback, and ROHC contexts, and how these terms relate to other terms, like network elements and IP interfaces, commonly used, for example, when addressing MIB issues.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group L-E. Jonsson

Request for Comments: 3759 Ericsson

Updates: 3095 April 2004

Category: Informational

RObust Header Compression (ROHC):

Terminology and Channel Mapping Examples

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 (2004). All Rights Reserved.

Abstract

This document aims to clarify terms and concepts presented in RFC

3095. RFC 3095 defines a Proposed Standard framework with profiles

for RObust Header Compression (ROHC). The standard introduces

various concepts which might be difficult to understand and

especially to relate correctly to the surrounding environments where

header compression may be used. This document aims at clarifying

these aspects of ROHC, discussing terms such as ROHC instances, ROHC

channels, ROHC feedback, and ROHC contexts, and how these terms

relate to other terms, like network elements and IP interfaces,

commonly used, for example, when addressing MIB issues.

Jonsson Informational [Page 1]

RFC 3759 ROHC Terminology and Channel Mapping Examples April 2004

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. ROHC External Terminology. . . . . . . . . . . . . . . . . . . 6

3.1. Network Elements and IP Interfaces . . . . . . . . . . . 6

3.2. Channels . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3. A Unidirectional Point-to-Point Link Example . . . . . . 8

3.4. A Bi-directional Point-to-Point Link Example . . . . . . 8

3.5. A Bi-directional Multipoint Link Example . . . . . . . . 9

3.6. A Multi-Channel Point-to-Point Link Example. . . . . . . 9

4. ROHC Instances . . . . . . . . . . . . . . . . . . . . . . . . 10

4.1. ROHC Compressors . . . . . . . . . . . . . . . . . . . . 11

4.2. ROHC Decompressors . . . . . . . . . . . . . . . . . . . 12

5. ROHC Channels. . . . . . . . . . . . . . . . . . . . . . . . . 13

6. ROHC Feedback Channels . . . . . . . . . . . . . . . . . . . . 14

6.1. Single-Channel Dedicated ROHC FB Channel Example . . . . 14

6.2. Piggybacked/Interspersed ROHC FB Channel Example . . . . 15

6.3. Dual-Channel Dedicated ROHC FB Channel Example . . . . . 16

7. ROHC Contexts. . . . . . . . . . . . . . . . . . . . . . . . . 17

8. Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

9. Implementation Implications. . . . . . . . . . . . . . . . . . 18

10. Security Considerations. . . . . . . . . . . . . . . . . . . . 19

11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 19

12. Informative References . . . . . . . . . . . . . . . . . . . . 19

13. Author's Address . . . . . . . . . . . . . . . . . . . . . . . 19

14. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 20

1. Introduction

In RFC 3095, the RObust Header Compression (ROHC) standard framework

is defined, along w...