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RObust Header Compression (ROHC): Context Replication for ROHC Profiles (RFC4164)

IP.com Disclosure Number: IPCOM000127530D
Original Publication Date: 2005-Aug-01
Included in the Prior Art Database: 2005-Aug-31
Document File: 22 page(s) / 47K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Pelletier: AUTHOR

Abstract

This document defines context replication, a complement to the context initialization procedure found in Robust Header Compression (ROHC), as specified in RFC 3095. Profiles defining support for context replication may use the mechanism described herein to establish a new context based on another already existing context. Context replication is introduced to reduce the overhead of the context establishment procedure. It may be especially useful for the compression of multiple short-lived flows that may be occurring simultaneously or near-simultaneously, such as short-lived TCP flows.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 6% of the total text.

Network Working Group                                       G. Pelletier
Request for Comments: 4164                                      Ericsson
Category: Standards Track                                    August 2005


                   RObust Header Compression (ROHC):
                 Context Replication for ROHC Profiles

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 (2005).

Abstract

   This document defines context replication, a complement to the
   context initialization procedure found in Robust Header Compression
   (ROHC), as specified in RFC 3095.  Profiles defining support for
   context replication may use the mechanism described herein to
   establish a new context based on another already existing context.
   Context replication is introduced to reduce the overhead of the
   context establishment procedure.  It may be especially useful for the
   compression of multiple short-lived flows that may be occurring
   simultaneously or near-simultaneously, such as short-lived TCP flows.


Pelletier                   Standards Track                     [Page 1]
RFC 4164         Context Replication for ROHC Profiles       August 2005


Table of Contents

   1. Introduction ....................................................3
   2. Terminology .....................................................4
   3. Context Replication for ROHC Profiles ...........................5
      3.1. Robustness Considerations ..................................5
      3.2. Replication of Control Fields ..............................5
      3.3. Compressor States and Logic ................................6
           3.3.1. Context Replication (CR) State ......................6
           3.3.2. State Machine with Context Replication ..............7
           3.3.3. State Transition Logic ..............................7
                  3.3.3.1. Selection of Base Context, Upward
                           Transition .................................8
                  3.3.3.2. Optimistic Approach, Upward Transition .....9
                  3.3.3.3. Optional Acknowledgements (ACKs),
                           Upward Transition ..........................9
                  3.3.3.4. Negative ACKs ...