6LoWPAN-GHC: Generic Header Compression for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)
RFC 7400
| Document | Type |
RFC - Proposed Standard
(November 2014; No errata)
Was draft-ietf-6lo-ghc (6lo WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-bormann-6lo-ghc | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Ulrich Herberg | ||
| Shepherd write-up | Show (last changed 2014-08-08) | ||
| IESG | IESG state | RFC 7400 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Brian Haberman | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) C. Bormann
Request for Comments: 7400 Universitaet Bremen TZI
Category: Standards Track November 2014
ISSN: 2070-1721
6LoWPAN-GHC: Generic Header Compression for IPv6
over Low-Power Wireless Personal Area Networks (6LoWPANs)
Abstract
RFC 6282 defines header compression in 6LoWPAN packets (where
"6LoWPAN" refers to "IPv6 over Low-Power Wireless Personal Area
Network"). The present document specifies a simple addition that
enables the compression of generic headers and header-like payloads,
without a need to define a new header compression scheme for each
such new header or header-like payload.
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/rfc7400.
Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Bormann Standards Track [Page 1]
RFC 7400 6LoWPAN-GHC November 2014
Table of Contents
1. Introduction ....................................................2
1.1. The Header Compression Coupling Problem ....................2
1.2. Compression Approach .......................................3
1.3. Terminology ................................................3
1.4. Notation ...................................................4
2. 6LoWPAN-GHC .....................................................4
3. Integrating 6LoWPAN-GHC into 6LoWPAN-HC .........................6
3.1. Compressing Payloads (UDP and ICMPv6) ......................6
3.2. Compressing Extension Headers ..............................6
3.3. Indicating GHC Capability ..................................7
3.4. Using the 6CIO .............................................8
4. IANA Considerations .............................................9
5. Security Considerations ........................................10
6. References .....................................................11
6.1. Normative References ......................................11
6.2. Informative References ....................................12
Appendix A. Examples ..............................................14
Acknowledgements ..................................................24
Author's Address ..................................................24
1. Introduction
1.1. The Header Compression Coupling Problem
[RFC6282] defines a scheme for header compression in 6LoWPAN
[RFC4944] packets; in this document, we refer to that scheme as
6LoWPAN Header Compression, or 6LoWPAN-HC (where "6LoWPAN" refers to
"IPv6 over Low-Power Wireless Personal Area Network"). As with most
header compression schemes, a new specification is necessary for
every new kind of header that needs to be compressed. In addition,
[RFC6282] does not define an extensibility scheme like the Robust
Header Compression (ROHC) profiles defined in ROHC [RFC3095]
[RFC5795]. This leads to the difficult situation in which 6LoWPAN-HC
tended to be reopened and reexamined each time a new header receives
consideration (or an old header is changed and reconsidered) in the
6LoWPAN/roll/CoRE cluster of IETF working groups. Although [RFC6282]
was finally completed and published, the underlying problem remains
unsolved.
The purpose of the present contribution is to plug into [RFC6282] as
is, using its Next Header Compression (NHC) concept. We add a
slightly less efficient, but vastly more general, form of compression
for headers of any kind and even for header-like payloads such as
those exhibited by routing protocols, DHCP, etc.: Generic Header
Compression (GHC). The objective is an extremely simple
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