LPWAN Static Context Header Compression (SCHC) and fragmentation for IPv6 and UDP
draft-ietf-lpwan-ipv6-static-context-hc-10

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Document Type Active Internet-Draft (lpwan WG)
Last updated 2018-02-28
Replaces draft-toutain-lpwan-ipv6-static-context-hc
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lpwan Working Group                                          A. Minaburo
Internet-Draft                                                    Acklio
Intended status: Informational                                L. Toutain
Expires: September 1, 2018                                IMT-Atlantique
                                                                C. Gomez
                                    Universitat Politecnica de Catalunya
                                                       February 28, 2018

  LPWAN Static Context Header Compression (SCHC) and fragmentation for
                              IPv6 and UDP
               draft-ietf-lpwan-ipv6-static-context-hc-10

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 LPWAN
   devices and in the network.  This document applies SCHC compression
   to IPv6/UDP headers.  This document also specifies a fragmentation
   and reassembly mechanism that is used to support the IPv6 MTU
   requirement over LPWAN technologies.  Fragmentation is mandatory 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 functionality.  This document purposefully offers
   flexibility with regard to parameter 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
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   and may be updated, replaced, or obsoleted by other documents at any

Minaburo, et al.        Expires September 1, 2018               [Page 1]
Internet-Draft                 LPWAN SCHC                  February 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 September 1, 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
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   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 . . . . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Static Context Header Compression . . . . . . . . . . . . . .  10
     6.1.  SCHC C/D Rules  . . . . . . . . . . . . . . . . . . . . .  11
     6.2.  Rule ID for SCHC C/D  . . . . . . . . . . . . . . . . . .  13
     6.3.  Packet processing . . . . . . . . . . . . . . . . . . . .  13
     6.4.  Matching operators  . . . . . . . . . . . . . . . . . . .  15
     6.5.  Compression Decompression Actions (CDA) . . . . . . . . .  16
       6.5.1.  not-sent CDA  . . . . . . . . . . . . . . . . . . . .  17
       6.5.2.  value-sent CDA  . . . . . . . . . . . . . . . . . . .  17
       6.5.3.  mapping-sent CDA  . . . . . . . . . . . . . . . . . .  17
       6.5.4.  LSB(y) CDA  . . . . . . . . . . . . . . . . . . . . .  18
       6.5.5.  DEViid, APPiid CDA  . . . . . . . . . . . . . . . . .  18
       6.5.6.  Compute-* . . . . . . . . . . . . . . . . . . . . . .  18
   7.  Fragmentation . . . . . . . . . . . . . . . . . . . . . . . .  19
     7.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .  19
     7.2.  Fragmentation Tools . . . . . . . . . . . . . . . . . . .  19
     7.3.  Reliability modes . . . . . . . . . . . . . . . . . . . .  22
     7.4.  Fragmentation Formats . . . . . . . . . . . . . . . . . .  24
       7.4.1.  Fragment format . . . . . . . . . . . . . . . . . . .  24
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