Static Context Header Compression (SCHC) Architecture
draft-pelov-lpwan-architecture-00

Document Type Active Internet-Draft (individual)
Authors Alexander Pelov  , Pascal Thubert  , Ana Minaburo 
Last updated 2021-01-19
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lpwan Working Group                                             A. Pelov
Internet-Draft                                                    Acklio
Intended status: Standards Track                              P. Thubert
Expires: July 23, 2021                                     Cisco Systems
                                                             A. Minaburo
                                                                  Acklio
                                                        January 19, 2021

        Static Context Header Compression (SCHC) Architecture
               draft-pelov-lpwan-architecture-00

Abstract

   This document defines the SCHC architecture.

Status of This Memo

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Global architecture . . . . . . . . . . . . . . . . . . . . .   3
   4.  Data management . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   The base operation and the definition of the SCHC compression &
   Fragmentation are now described in several documents published by the
   LPWAN working group.

   Among them:

   o  The [rfc8724] defines the generic compression and fragmentation
      mechanisms for SCHC and applies it to IPv6 and UDP.

   o  The [I-D.ietf-lpwan-coap-static-context-hc] extend the compression
      to CoAP and OSCORE.

   o  The [I-D.ietf-lpwan-schc-yang-data-model] defines a rule
      representation using the YANG formalism.

   As [I-D.ietf-lpwan-coap-static-context-hc] states, the SCHC
   compression and fragmentation mechanism can be implemented at
   different levels and/or managed by different organizations.  For
   instance, as represented figure Figure 1, IP compression and
   fragmentation may be managed by the network SCHC instance and end-to-
   end compression between the device and the application.  The former
   can itself be split in two instances since encryption hides the field
   structure.

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         (device)            (NGW)                              (App)

         +--------+                                           +--------+
  A S    |  CoAP  |                                           |  CoAP  |
  p C    |  inner |                                           |  inner |
  p H    +--------+                                           +--------+
  . V    |  SCHC  |                                           |  SCHC  |
         |  inner |   cryptographical boundary                |  inner |
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  A S    |  CoAP  |                                           |  CoAP  |
  p C    |  outer |                                           |  outer |
  p H    +--------+                                           +--------+
  . C    |  SCHC  |                                           |  SCHC  |
         |  outer |   functional boundary                     |  outer |
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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