LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-13

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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.

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
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   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

Minaburo, et al.        Expires November 23, 2018               [Page 1]
Internet-Draft                 LPWAN SCHC                       May 2018

   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 23, 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  . . . . . . . . . . . . . . . . . . . . .   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