LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-13
lpwan Working Group A. Minaburo
Internet-Draft Acklio
Intended status: Informational L. Toutain
Expires: November 23, 2018 IMT-Atlantique
C. Gomez
Universitat Politecnica de Catalunya
May 22, 2018
LPWAN Static Context Header Compression (SCHC) and fragmentation for
IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-13
Abstract
This document defines the Static Context Header Compression (SCHC)
framework, which provides header compression and fragmentation
functionality. SCHC has been tailored for Low Power Wide Area
Networks (LPWAN).
SCHC compression is based on a common static context stored in both
LPWAN devices and in the network sides. This document defines SCHC
header compression mechanism and its deployment for 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. The Fragmentation is needed for IPv6 datagrams that,
after SCHC compression or when it has not been possible to apply such
compression, still exceed the layer two maximum payload size.
The SCHC header compression mechanism is independent of the specific
LPWAN technology over which it will be used. Note that this document
defines generic functionalities and advisedly offers flexibility with
regard to parameters settings and mechanism choices, that are
expected to be made in other technology-specific documents.
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Internet-Draft LPWAN SCHC May 2018
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This Internet-Draft will expire on November 23, 2018.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. LPWAN Architecture . . . . . . . . . . . . . . . . . . . . . 4
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. SCHC overview . . . . . . . . . . . . . . . . . . . . . . . . 8
5. Rule ID . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6. Static Context Header Compression . . . . . . . . . . . . . . 11
6.1. SCHC C/D Rules . . . . . . . . . . . . . . . . . . . . . 12
6.2. Rule ID for SCHC C/D . . . . . . . . . . . . . . . . . . 14
6.3. Packet processing . . . . . . . . . . . . . . . . . . . . 14
6.4. Matching operators . . . . . . . . . . . . . . . . . . . 16
6.5. Compression Decompression Actions (CDA) . . . . . . . . . 17
6.5.1. not-sent CDA . . . . . . . . . . . . . . . . . . . . 18
6.5.2. value-sent CDA . . . . . . . . . . . . . . . . . . . 18
6.5.3. mapping-sent CDA . . . . . . . . . . . . . . . . . . 18
6.5.4. LSB CDA . . . . . . . . . . . . . . . . . . . . . . . 19
6.5.5. DEViid, APPiid CDA . . . . . . . . . . . . . . . . . 19
6.5.6. Compute-* . . . . . . . . . . . . . . . . . . . . . . 19
7. Fragmentation . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . 20
7.2. Fragmentation Tools . . . . . . . . . . . . . . . . . . . 20
7.3. Reliability modes . . . . . . . . . . . . . . . . . . . . 23
7.4. Fragmentation Formats . . . . . . . . . . . . . . . . . . 25
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