SCHC over Sigfox LPWAN
draft-ietf-lpwan-schc-over-sigfox-02

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lpwan Working Group                                           JC. Zuniga
Internet-Draft                                                    SIGFOX
Intended status: Informational                                  C. Gomez
Expires: November 16, 2020          Universitat Politecnica de Catalunya
                                                              L. Toutain
                                                          IMT-Atlantique
                                                            May 15, 2020

                         SCHC over Sigfox LPWAN
                  draft-ietf-lpwan-schc-over-sigfox-02

Abstract

   The Generic Framework for Static Context Header Compression and
   Fragmentation (SCHC) specification describes both, an application
   header compression scheme, and a frame fragmentation and loss
   recovery functionality for Low Power Wide Area Network (LPWAN)
   technologies.  SCHC offers a great level of flexibility that can be
   tailored for different LPWAN technologies.

   The present document provides the optimal parameters and modes of
   operation when SCHC is implemented over a Sigfox LPWAN.  This set of
   parameters are also known as a "SCHC over Sigfox profile."

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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   This Internet-Draft will expire on November 16, 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Zuniga, et al.          Expires November 16, 2020               [Page 1]
Internet-Draft           SCHC over Sigfox LPWAN                 May 2020

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  SCHC: Generic Framework for Static Context Header Compression
       and Fragmentation . . . . . . . . . . . . . . . . . . . . . .   3
   4.  SCHC over Sigfox  . . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  Network Architecture  . . . . . . . . . . . . . . . . . .   3
     4.2.  Uplink  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.3.  Downlink  . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  SCHC Rules  . . . . . . . . . . . . . . . . . . . . . . .   6
     4.5.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .   7
       4.5.1.  Uplink Fragmentation  . . . . . . . . . . . . . . . .   7
       4.5.2.  Downlink Fragmentation  . . . . . . . . . . . . . . .  10
     4.6.  Padding . . . . . . . . . . . . . . . . . . . . . . . . .  11
   5.  Security considerations . . . . . . . . . . . . . . . . . . .  11
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   The Generic Framework for Static Context Header Compression and
   Fragmentation (SCHC) specification [RFC8724] defines both, a higher
   layer header compression scheme and a fragmentation and loss recovery
   functionality.  Both can be used on top of all the LWPAN systems
   defined in [RFC8376] . These LPWAN systems have similar
   characteristics such as star-oriented topologies, network
   architecture, connected devices with built-in applications, etc.

   SCHC offers a great level of flexibility to accommodate all these
   LPWAN systems.  Even though there are a great number of similarities
   between LPWAN technologies, some differences exist with respect to
   the transmission characteristics, payload sizes, etc.  Hence, there
   are optimal parameters and modes of operation that can be used when