Static Context Header Compression (SCHC) over LoRaWAN
draft-ietf-lpwan-schc-over-lorawan-08

Document Type Active Internet-Draft (lpwan WG)
Last updated 2020-08-03 (latest revision 2020-07-12)
Replaces draft-petrov-lpwan-ipv6-schc-over-lorawan
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Intended RFC status Proposed Standard
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Send notices to Dominique Barthel <dominique.barthel@orange.com>
lpwan Working Group                                      O. Gimenez, Ed.
Internet-Draft                                                   Semtech
Intended status: Informational                            I. Petrov, Ed.
Expires: January 13, 2021                                         Acklio
                                                           July 12, 2020

         Static Context Header Compression (SCHC) over LoRaWAN
               draft-ietf-lpwan-schc-over-lorawan-08

Abstract

   The Static Context Header Compression (SCHC) specification describes
   generic header compression and fragmentation techniques for LPWAN
   (Low Power Wide Area Networks) technologies.  SCHC is a generic
   mechanism designed for great flexibility so that it can be adapted
   for any of the LPWAN technologies.

   This document provides the adaptation of SCHC for use in LoRaWAN
   networks, and provides elements such as efficient parameterization
   and modes of operation.  This is called a profile.

Status of This Memo

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   This Internet-Draft will expire on January 13, 2021.

Copyright Notice

   Copyright (c) 2020 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

Gimenez & Petrov        Expires January 13, 2021                [Page 1]
Internet-Draft              SCHC-over-LoRaWAN                  July 2020

   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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Static Context Header Compression Overview  . . . . . . . . .   4
   4.  LoRaWAN Architecture  . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Device classes (A, B, C) and interactions . . . . . . . .   6
     4.2.  Device addressing . . . . . . . . . . . . . . . . . . . .   7
     4.3.  General Frame Types . . . . . . . . . . . . . . . . . . .   7
     4.4.  LoRaWAN MAC Frames  . . . . . . . . . . . . . . . . . . .   8
     4.5.  LoRaWAN empty frame . . . . . . . . . . . . . . . . . . .   8
     4.6.  Unicast and multicast technology  . . . . . . . . . . . .   8
   5.  SCHC-over-LoRaWAN . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  LoRaWAN FPort . . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Rule ID management  . . . . . . . . . . . . . . . . . . .   9
     5.3.  IID computation . . . . . . . . . . . . . . . . . . . . .  10
     5.4.  Padding . . . . . . . . . . . . . . . . . . . . . . . . .  11
     5.5.  Decompression . . . . . . . . . . . . . . . . . . . . . .  11
     5.6.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .  11
       5.6.1.  DTag  . . . . . . . . . . . . . . . . . . . . . . . .  11
       5.6.2.  Uplink fragmentation: From device to SCHC gateway . .  12
       5.6.3.  Downlink fragmentation: From SCHC gateway to device .  15
     5.7.  SCHC Fragment Format  . . . . . . . . . . . . . . . . . .  18
       5.7.1.  All-0 SCHC fragment . . . . . . . . . . . . . . . . .  18
       5.7.2.  All-1 SCHC fragment . . . . . . . . . . . . . . . . .  18
       5.7.3.  Delay after each message to respect local regulation   18
   6.  Security considerations . . . . . . . . . . . . . . . . . . .  18
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  19
   Contributors  . . . . . . . . . . . . . . . . . . . . . . . . . .  19
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  20
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  21
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .  21
     A.1.  Uplink - Compression example - No fragmentation . . . . .  21
     A.2.  Uplink - Compression and fragmentation example  . . . . .  22
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