LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-14

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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

   This Internet-Draft is submitted in full conformance with the
   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

Minaburo, et al.        Expires December 31, 2018               [Page 1]
Internet-Draft                 LPWAN SCHC                      June 2018

   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on December 31, 2018.

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
   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.

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