SCHC over Sigfox LPWAN
draft-ietf-lpwan-schc-over-sigfox-04

Document Type Active Internet-Draft (lpwan WG)
Authors Juan-Carlos Zúñiga  , Carles Gomez  , Laurent Toutain 
Last updated 2020-11-02
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lpwan Working Group                                           JC. Zuniga
Internet-Draft                                                    SIGFOX
Intended status: Informational                                  C. Gomez
Expires: May 4, 2021                Universitat Politecnica de Catalunya
                                                              L. Toutain
                                                          IMT-Atlantique
                                                        October 31, 2020

                         SCHC over Sigfox LPWAN
                  draft-ietf-lpwan-schc-over-sigfox-04

Abstract

   The Generic Framework for Static Context Header Compression and
   Fragmentation (SCHC) specification describes two mechanisms: i) an
   application header compression scheme, and ii) a frame fragmentation
   and loss recovery functionality.  SCHC offers a great level of
   flexibility that can be tailored for different Low Power Wide Area
   Network (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
   Task Force (IETF).  Note that other groups may also distribute
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   This Internet-Draft will expire on May 4, 2021.

Copyright Notice

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

Zuniga, et al.             Expires May 4, 2021                  [Page 1]
Internet-Draft           SCHC over Sigfox LPWAN             October 2020

   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
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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.  ACK on Downlink . . . . . . . . . . . . . . . . . . . . .   7
     4.5.  SCHC Rules  . . . . . . . . . . . . . . . . . . . . . . .   7
     4.6.  Fragmentation . . . . . . . . . . . . . . . . . . . . . .   7
       4.6.1.  Uplink Fragmentation  . . . . . . . . . . . . . . . .   8
       4.6.2.  Downlink Fragmentation  . . . . . . . . . . . . . . .  11
     4.7.  Padding . . . . . . . . . . . . . . . . . . . . . . . . .  12
   5.  Security considerations . . . . . . . . . . . . . . . . . . .  12
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   The Generic Framework for Static Context Header Compression and
   Fragmentation (SCHC) specification [RFC8724] describes two
   mechanisms: i) an application header compression scheme, and ii) a
   frame fragmentation and loss recovery functionality.  Both can be
   used on top of all the four LWPAN technologies defined in [RFC8376] .
   These LPWANs 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 technologies.  Even though there are a great number of
   similarities between them, some differences exist with respect to the
   transmission characteristics, payload sizes, etc.  Hence, there are
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