Data Model for Static Context Header Compression (SCHC)
draft-toutain-lpwan-schc-yang-data-model-00
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Network Working Group A. Minaburo
Internet-Draft Acklio
Intended status: Informational L. Toutain
Expires: September 12, 2019 Institut MINES TELECOM ; IMT Atlantique
March 11, 2019
Data Model for Static Context Header Compression (SCHC)
draft-toutain-lpwan-schc-yang-data-model-00
Abstract
This document describes a YANG data model for the SCHC (Static
Context Header Compression). A generic module is defined, that can
be applied for any headers and also a specific model for the IPv6 UDP
protocol stack is also proposed. Note that this draft is a first
attempt to define a YANG data module for SCHC, more work is needed to
use all the YANG facilities.
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
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 12, 2019.
Copyright Notice
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
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
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
Minaburo & Toutain Expires September 12, 2019 [Page 1]
Internet-Draft LPWAN SCHC YANG module March 2019
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
1. Introduction
SCHC [I-D.ietf-lpwan-ipv6-static-context-hc] defines a compression
technique for LPWAN networks based on static context. The context
contains a list of rules (cf. Figure 1). Each rule contains itself
a list of field descriptions composed of a field identifier (FID), a
field length (FID), a field position (FP), a field direction (DI), a
target value (TV), a matching operator (MO) and a Compression/
Decompression Action (CDA).
+-----------------------------------------------------------------+
| Rule N |
+-----------------------------------------------------------------+|
| Rule i ||
+-----------------------------------------------------------------+||
| (FID) Rule 1 |||
|+-------+--+--+--+------------+-----------------+---------------+|||
||Field 1|FL|FP|DI|Target Value|Matching Operator|Comp/Decomp Act||||
|+-------+--+--+--+------------+-----------------+---------------+|||
||Field 2|FL|FP|DI|Target Value|Matching Operator|Comp/Decomp Act||||
|+-------+--+--+--+------------+-----------------+---------------+|||
||... |..|..|..| ... | ... | ... ||||
|+-------+--+--+--+------------+-----------------+---------------+||/
||Field N|FL|FP|DI|Target Value|Matching Operator|Comp/Decomp Act|||
|+-------+--+--+--+------------+-----------------+---------------+|/
| |
\-----------------------------------------------------------------/
Figure 1: Compression Decompression Context
The goal of this document is to provide an YANG data model to
represent SCHC Compression and Fragmentation rules, to allow
management over a LPWAN network. The main constraints are:
o since the device may be managed through the LPWAN network,
management messages must be compact. COREconf offers a
representation based on CBOR.
o this data model can be extended with new values, such as new field
id, new MO or CDA.
Minaburo & Toutain Expires September 12, 2019 [Page 2]
Internet-Draft LPWAN SCHC YANG module March 2019
2. YANG types
2.1. Field Identifier
The field identifier is used to identify a specific field. It is
viewed as an uint32.
2.2. Target Value field
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