LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-17

Document Type Active Internet-Draft (lpwan WG)
Last updated 2018-10-22
Replaces draft-toutain-lpwan-ipv6-static-context-hc
Stream IETF
Intended RFC status Proposed Standard
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Send notices to Dominique Barthel <dominique.barthel@orange.com>, Pascal Thubert <pthubert@cisco.com>
lpwan Working Group                                          A. Minaburo
Internet-Draft                                                    Acklio
Intended status: Standards Track                              L. Toutain
Expires: April 25, 2019                                   IMT-Atlantique
                                                                C. Gomez
                                    Universitat Politecnica de Catalunya
                                                              D. Barthel
                                                             Orange Labs
                                                              JC. Zuniga
                                                                  SIGFOX
                                                        October 22, 2018

  LPWAN Static Context Header Compression (SCHC) and fragmentation for
                              IPv6 and UDP
               draft-ietf-lpwan-ipv6-static-context-hc-17

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.
   Technology-specific and product-specific settings and choices are
   expected to be grouped into Profiles specified in other documents.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

Minaburo, et al.         Expires April 25, 2019                 [Page 1]
Internet-Draft                 LPWAN SCHC                   October 2018

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   This Internet-Draft will expire on April 25, 2019.

Copyright Notice

   Copyright (c) 2018 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
   (https://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
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   described in the Simplified BSD License.

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  . . . . . . . . . . . . . . . . . . .  11
   6.  Rule ID . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
   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
       7.5.1.  processing variable-length fields . . . . . . . . . .  17
       7.5.2.  not-sent CDA  . . . . . . . . . . . . . . . . . . . .  18
       7.5.3.  value-sent CDA  . . . . . . . . . . . . . . . . . . .  18
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