Static Context Header Compression (SCHC) and fragmentation for LPWAN, application to UDP/IPv6
draft-ietf-lpwan-ipv6-static-context-hc-19
lpwan Working Group A. Minaburo
Internet-Draft Acklio
Intended status: Standards Track L. Toutain
Expires: January 5, 2020 IMT-Atlantique
C. Gomez
Universitat Politecnica de Catalunya
D. Barthel
Orange Labs
JC. Zuniga
SIGFOX
July 04, 2019
Static Context Header Compression (SCHC) and fragmentation for LPWAN,
application to UDP/IPv6
draft-ietf-lpwan-ipv6-static-context-hc-19
Abstract
This document defines the Static Context Header Compression (SCHC)
framework, which provides both header compression and fragmentation
functionalities. SCHC has been designed for Low Power Wide Area
Networks (LPWAN).
SCHC compression is based on a common static context stored in both
the LPWAN device and the network side. This document defines a
header compression mechanism and its application to compress IPv6/UDP
headers.
This document also specifies a fragmentation and reassembly mechanism
that is used to support the IPv6 MTU requirement over the LPWAN
technologies. Fragmentation is needed for IPv6 datagrams that, after
SCHC compression or when such compression was not possible, still
exceed the layer-2 maximum payload size.
The SCHC header compression and fragmentation mechanisms are
independent of the specific LPWAN technology over which they are
used. This document defines generic functionalities and offers
flexibility with regard to parameter settings and mechanism choices.
This document standardizes the exchange over the LPWAN between two
SCHC entities. Settings and choices specific to a technology or a
product are expected to be grouped into profiles, which are specified
in other documents. Data models for the context and profiles are out
of scope.
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Internet-Draft LPWAN SCHC July 2019
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Requirements Notation . . . . . . . . . . . . . . . . . . . . 5
3. LPWAN Architecture . . . . . . . . . . . . . . . . . . . . . 5
4. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
5. SCHC overview . . . . . . . . . . . . . . . . . . . . . . . . 8
5.1. SCHC Packet format . . . . . . . . . . . . . . . . . . . 10
5.2. Functional mapping . . . . . . . . . . . . . . . . . . . 10
6. Rule ID . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7. Compression/Decompression . . . . . . . . . . . . . . . . . . 12
7.1. SCHC C/D Rules . . . . . . . . . . . . . . . . . . . . . 12
7.2. Rule ID for SCHC C/D . . . . . . . . . . . . . . . . . . 14
7.3. Packet processing . . . . . . . . . . . . . . . . . . . . 15
7.4. Matching operators . . . . . . . . . . . . . . . . . . . 16
7.5. Compression Decompression Actions (CDA) . . . . . . . . . 17
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