LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-14
lpwan Working Group A. Minaburo
Internet-Draft Acklio
Intended status: Informational L. Toutain
Expires: December 31, 2018 IMT-Atlantique
C. Gomez
Universitat Politecnica de Catalunya
D. Barthel
Orange Labs
June 29, 2018
LPWAN Static Context Header Compression (SCHC) and fragmentation for
IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-14
Abstract
This document defines the Static Context Header Compression (SCHC)
framework, which provides both header compression and fragmentation
functionalities. SCHC has been tailored for Low Power Wide Area
Networks (LPWAN).
SCHC compression is based on a common static context stored in both
the LPWAN devices 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 two maximum payload size.
The SCHC header compression and fragmentation mechanisms are
independent of the specific LPWAN technology over which they are
used. Note that this document defines generic functionalities and
advisedly offers flexibility with regard to parameter settings and
mechanism choices. Such settings and choices are expected to be made
in other technology-specific documents.
Status of This Memo
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provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Draft LPWAN SCHC June 2018
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This Internet-Draft will expire on December 31, 2018.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. LPWAN Architecture . . . . . . . . . . . . . . . . . . . . . 5
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. SCHC overview . . . . . . . . . . . . . . . . . . . . . . . . 9
5. Rule ID . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6. Static Context Header Compression . . . . . . . . . . . . . . 12
6.1. SCHC C/D Rules . . . . . . . . . . . . . . . . . . . . . 13
6.2. Rule ID for SCHC C/D . . . . . . . . . . . . . . . . . . 15
6.3. Packet processing . . . . . . . . . . . . . . . . . . . . 15
6.4. Matching operators . . . . . . . . . . . . . . . . . . . 17
6.5. Compression Decompression Actions (CDA) . . . . . . . . . 17
6.5.1. not-sent CDA . . . . . . . . . . . . . . . . . . . . 19
6.5.2. value-sent CDA . . . . . . . . . . . . . . . . . . . 19
6.5.3. mapping-sent CDA . . . . . . . . . . . . . . . . . . 19
6.5.4. LSB CDA . . . . . . . . . . . . . . . . . . . . . . . 19
6.5.5. DevIID, AppIID CDA . . . . . . . . . . . . . . . . . 20
6.5.6. Compute-* . . . . . . . . . . . . . . . . . . . . . . 20
7. Fragmentation . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2. Fragmentation Tools . . . . . . . . . . . . . . . . . . . 21
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