Static Context Header Compression (SCHC) over LoRaWAN
draft-ietf-lpwan-schc-over-lorawan-02

Document Type Active Internet-Draft (lpwan WG)
Last updated 2019-07-08
Replaces draft-petrov-lpwan-ipv6-schc-over-lorawan
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lpwan Working Group                                      O. Gimenez, Ed.
Internet-Draft                                                   Semtech
Intended status: Informational                            I. Petrov, Ed.
Expires: January 9, 2020                                          Acklio
                                                           July 08, 2019

         Static Context Header Compression (SCHC) over LoRaWAN
                 draft-ietf-lpwan-schc-over-lorawan-02

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.

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   Copyright (c) 2019 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Gimenez & Petrov         Expires January 9, 2020                [Page 1]
Internet-Draft              SCHC-over-LoRaWAN                  July 2019

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Static Context Header Compression Overview  . . . . . . . . .   3
   4.  LoRaWAN Architecture  . . . . . . . . . . . . . . . . . . . .   5
     4.1.  End-Device classes (A, B, C) and interactions . . . . . .   6
     4.2.  End-Device addressing . . . . . . . . . . . . . . . . . .   7
     4.3.  General Message Types . . . . . . . . . . . . . . . . . .   7
     4.4.  LoRaWAN MAC Frames  . . . . . . . . . . . . . . . . . . .   8
   5.  SCHC-over-LoRaWAN . . . . . . . . . . . . . . . . . . . . . .   8
     5.1.  LoRaWAN FPort . . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Rule ID management  . . . . . . . . . . . . . . . . . . .   9
     5.3.  IID computation . . . . . . . . . . . . . . . . . . . . .   9
     5.4.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .   9
     5.5.  DTag  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
       5.5.1.  Uplink fragmentation: From device to SCHC gateway . .  10
       5.5.2.  Downlink fragmentation: From SCHC gateway to device .  13
   6.  Security considerations . . . . . . . . . . . . . . . . . . .  16
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  17
   Contributors  . . . . . . . . . . . . . . . . . . . . . . . . . .  17
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  17
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  18
   Appendix A.  Examples . . . . . . . . . . . . . . . . . . . . . .  18
     A.1.  Uplink - Compression example - No fragmentation . . . . .  18
     A.2.  Uplink - Compression and fragmentation example  . . . . .  19
     A.3.  Downlink  . . . . . . . . . . . . . . . . . . . . . . . .  20
   Appendix B.  Note . . . . . . . . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

1.  Introduction

   The Static Context Header Compression (SCHC) specification
   [I-D.ietf-lpwan-ipv6-static-context-hc] describes generic header
   compression and fragmentation techniques that can be used on all
   LPWAN (Low Power Wide Area Networks) technologies defined in
   [RFC8376].  Even though those technologies share a great number of
   common features like star-oriented topologies, network architecture,
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