Internet-Draft WSON Tunnel YANG July 2022
Lee, et al. Expires 12 January 2023 [Page]
Workgroup:
CCAMP Working Group
Internet-Draft:
draft-ietf-ccamp-wson-tunnel-model-07
Published:
Intended Status:
Standards Track
Expires:
Authors:
Y. Lee
Samsung
H. Zheng
Huawei Technologies
A. Guo
Futurewei
V. Lopez
Nokia
D. King
University of Lancaster
B. Yoon
ETRI
R. Vilalta
CTTC

A Yang Data Model for WSON Tunnel

Abstract

This document provides a YANG data model for WSON TE tunnel.

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 12 January 2023.

▲

Table of Contents

1. Introduction

This document provides a YANG data model for WSON tunnel model. The YANG model described in this document is a WSON technology-specific Yang Tunnel model based on the information model developed in [RFC7446] and the two encoding documents [RFC7579] and [RFC7581] that developed protocol independent encodings based on [RFC7446].

This document augments the generic TE tunnel model [I-D.ietf-teas-yang-te].

1.1. Terminology

Refer to [RFC7446] and [RFC7581] for the key terms used in this document.

The following terms are defined in [RFC7950] and are not redefined here:

The following terms are defined in [RFC6241] and are not redefined here:

The terminology for describing YANG data models is found in [RFC7950].

1.2. Tree Diagram

A simplified graphical representation of the data model is used in Section 3 of this this document. The meaning of the symbols in these diagrams is defined in [RFC8340].

1.3. Prefixes in Data Node Names

In this document, names of data nodes and other data model objects are prefixed using the standard prefix associated with the corresponding YANG imported modules. The module ietf-layer0-types specified in [RFC9093], ietf-layer1-types specified in [I-D.ietf-ccamp-layer1-types], ietf-te-path-computation specified in [I-D.ietf-teas-yang-path-computation] and ietf-te specified in [I-D.ietf-teas-yang-te] are imported in this module.


    +-------------+-------------------+------------------------------+
    | Prefix      | YANG module       |         Reference            |
    +-------------+-------------------+------------------------------+
    | layer0-types|ietf-layer0-types  |[RFC 9093]                    |
    | layer1-types|ietf-layer1-types  |[I-D.ietf-ccamp-layer1-types] |
    | tepc  |ietf-te-path-computation |[I-D.ietf-teas-yang-path-computation]|
    | te          | ietf-te           |[I-D.ietf-teas-yang-te]       |
    | wson-tunnel | ietf-wson-tunnel  |[RFC XXXX]                    |
    +-------------+-------------------+------------------------------+

Note: The RFC Editor will replace XXXX with the number assigned to the RFC once this draft becomes an RFC.

2. WSON Tunnel Model Description

2.1. Overview of WSON Tunnel Model

The WSON tunnel model is using TE tunnel [I-D.ietf-teas-yang-te] and TE types [RFC8776] as a basic model and augment to the TE tunnel with WSON-specific parameters, including the bandwidth information and label information. It is also worth noting that the WSON tunnel provisioning is usually based on the WSON topology. Therefore the WSON tunnel model is usually used together with WSON topology model specified in [RFC9094].

More scenarios and model applications can be found in [I-D.ietf-ccamp-transport-nbi-app-statement] and [I-D.ietf-teas-actn-yang]. The current model is following the YANG language specification as [RFC7950], and the corresponding protocol is recommended to be Netconf protocol in [RFC6241] or RESTconf protocol in [RFC8040].

The YANG module ietf-wson-tunnel defined in this document conforms to the Network Management Datastore Architecture (NMDA) defined in [RFC8342].

2.2. WSON-specific Parameters in Tunnel Model

WSON specific parameters have been augmenting to the TE tunnel models. The attributes on both of the source and destination need to be configured when setting up the tunnel. Typical parameters, including bandwidth and grid information, are required in the WSON tunnel model. These parameters are consistent with the framework in [RFC6163], and the specification in [RFC7579] and [RFC7581].

The WSON bandwidth information has been augmenting to various sections of TE tunnel models, including tunnel bandwidth, primary path bandwidth and so on. The WSON label information has been augmenting to label hop of a group of routing objects and also LSPs.

3. WSON Tunnel YANG Tree 


module: ietf-wson-tunnel

  augment /te:te/te:tunnels/te:tunnel:
    +--rw fec-type?           identityref
    +--rw termination-type?   identityref
    +--rw bit-stuffing?       boolean
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-in-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-out-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-in-segment/te:label-restrictions
            /te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-in-segment/te:label-restrictions
            /te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-out-segment/te:label-restrictions
            /te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction:
    +--rw grid-type?   identityref
    +--rw priority?    uint8
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint
            /te:explicit-route-objects-always
            /te:route-object-exclude-always/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint
            /te:explicit-route-objects-always
            /te:route-object-include-exclude/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-in-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-out-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:globals/te:named-path-constraints
            /te:named-path-constraint/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:optimizations/te:algorithm/te:metric
            /te:optimization-metric/te:explicit-route-exclude-objects
            /te:route-object-exclude-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:optimizations/te:algorithm/te:metric
            /te:optimization-metric/te:explicit-route-include-objects
            /te:route-object-include-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:explicit-route-objects-always
            /te:route-object-exclude-always/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:explicit-route-objects-always
            /te:route-object-include-exclude/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-start/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-end/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-step/te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:computed-paths-properties
            /te:computed-path-properties/te:path-properties
            /te:path-route-objects/te:path-route-object/te:type
            /te:label/te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--ro (grid-type)?
          +--:(dwdm)
          |  +--ro (single-or-super-channel)?
          |     +--:(single)
          |     |  +--ro dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--ro cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path/te:optimizations
            /te:algorithm/te:metric/te:optimization-metric
            /te:explicit-route-exclude-objects
            /te:route-object-exclude-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path/te:optimizations
            /te:algorithm/te:metric/te:optimization-metric
            /te:explicit-route-include-objects
            /te:route-object-include-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:explicit-route-objects-always
            /te:route-object-exclude-always/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:explicit-route-objects-always
            /te:route-object-include-exclude/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-start/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-end/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-in-segment/te:label-restrictions
            /te:label-restriction/te:label-step/te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-out-segment/te:label-restrictions
            /te:label-restriction/te:label-start/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-out-segment/te:label-restrictions
            /te:label-restriction/te:label-end/te:te-label
            /te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:path-out-segment/te:label-restrictions
            /te:label-restriction/te:label-step/te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:primary-paths
            /te:primary-path/te:primary-reverse-path
            /te:computed-paths-properties/te:computed-path-properties
            /te:path-properties/te:path-route-objects
            /te:path-route-object/te:type/te:label/te:label-hop
            /te:te-label/te:technology:
    +--:(wson)
       +--ro (grid-type)?
          +--:(dwdm)
          |  +--ro (single-or-super-channel)?
          |     +--:(single)
          |     |  +--ro dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--ro cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:optimizations/te:algorithm
            /te:metric/te:optimization-metric
            /te:explicit-route-exclude-objects
            /te:route-object-exclude-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:optimizations/te:algorithm
            /te:metric/te:optimization-metric
            /te:explicit-route-include-objects
            /te:route-object-include-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:explicit-route-objects-always
            /te:route-object-exclude-always/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:explicit-route-objects-always
            /te:route-object-include-exclude/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:secondary-paths
            /te:secondary-path/te:computed-paths-properties
            /te:computed-path-properties/te:path-properties
            /te:path-route-objects/te:path-route-object/te:type
            /te:label/te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--ro (grid-type)?
          +--:(dwdm)
          |  +--ro (single-or-super-channel)?
          |     +--:(single)
          |     |  +--ro dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--ro cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:optimizations/te:algorithm
            /te:metric/te:optimization-metric
            /te:explicit-route-exclude-objects
            /te:route-object-exclude-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:optimizations/te:algorithm
            /te:metric/te:optimization-metric
            /te:explicit-route-include-objects
            /te:route-object-include-object/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path
            /te:explicit-route-objects-always
            /te:route-object-exclude-always/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path
            /te:explicit-route-objects-always
            /te:route-object-include-exclude/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw (single-or-super-channel)?
          |     +--:(single)
          |     |  +--rw dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--rw subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-in-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction
            /te:label-start/te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-end
            /te:te-label/te:technology:
    +--:(wson)
       +--rw (grid-type)?
          +--:(dwdm)
          |  +--rw dwdm-n?   l0-types:dwdm-n
          +--:(cwdm)
             +--rw cwdm-n?   l0-types:cwdm-n
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:path-out-segment
            /te:label-restrictions/te:label-restriction/te:label-step
            /te:technology:
    +--:(wson)
       +--rw (l0-grid-type)?
          +--:(dwdm)
          |  +--rw wson-dwdm-channel-spacing?   identityref
          +--:(cwdm)
             +--rw wson-cwdm-channel-spacing?   identityref
  augment /te:te/te:tunnels/te:tunnel/te:secondary-reverse-paths
            /te:secondary-reverse-path/te:computed-paths-properties
            /te:computed-path-properties/te:path-properties
            /te:path-route-objects/te:path-route-object/te:type
            /te:label/te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--ro (grid-type)?
          +--:(dwdm)
          |  +--ro (single-or-super-channel)?
          |     +--:(single)
          |     |  +--ro dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--ro cwdm-n?                    l0-types:cwdm-n
  augment /te:te/te:lsps/te:lsp/te:lsp-record-route-information
            /te:lsp-record-route-information/te:type/te:label
            /te:label-hop/te:te-label/te:technology:
    +--:(wson)
       +--ro (grid-type)?
          +--:(dwdm)
          |  +--ro (single-or-super-channel)?
          |     +--:(single)
          |     |  +--ro dwdm-n?              l0-types:dwdm-n
          |     +--:(super)
          |        +--ro subcarrier-dwdm-n*   l0-types:dwdm-n
          +--:(cwdm)
             +--ro cwdm-n?                    l0-types:cwdm-n

4. WSON Tunnel YANG Code 

<CODE BEGINS>file "ietf-wson-tunnel@2021-10-19.yang"
module ietf-wson-tunnel {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-wson-tunnel";
  prefix "wson-tnl";

  import ietf-te {
    prefix "te";
    revision-date "2021-02-20";
    reference
      "I-D.ietf-teas-yang-te-19: A YANG Data Model for Traffic
      Engineering Tunnels and Interfaces. ";
  }

  import ietf-layer0-types {
    prefix "l0-types";
  }

  import ietf-layer0-types-ext {
    prefix "l0-types-ext";
  }

  organization
    "IETF CCAMP Working Group";

  contact
    "WG Web:   <http://tools.ietf.org/wg/ccamp/>
     WG List:  <mailto:ccamp@ietf.org>

     Editor:   Young Lee
               <leeyoung.tx@gmail.com>

     Editor:   Haomian Zheng
               <zhenghaomian@huawei.com>

     Editor:   Aihua Guo
               <aihuaguo.ietf@gmail.com>

     Editor:   Victor Lopez
               <victor.lopez@nokia.com>

     Editor:   Daniel King
               <d.king@lancaster.ac.uk>

     Editor:   Bin Yeong Yoon
               <byyun@etri.re.kr>

     Editor:   Ricard Vilalta
               <ricard.vilalta@cttc.es>";

  description
    "This module defines a model for WSON Tunnel Services.

    The model fully conforms to the Network Management
    Datastore Architecture (NMDA).

    Copyright (c) 2021 IETF Trust and the persons
    identified as authors of the code.  All rights reserved.
    Redistribution and use in source and binary forms, with or
    without modification, is permitted pursuant to, and subject
    to the license terms contained in, the Simplified BSD License
    set forth in Section 4.c of the IETF Trust's Legal Provisions
    Relating to IETF Documents
    (https://trustee.ietf.org/license-info).
    This version of this YANG module is part of RFC XXXX; see
    the RFC itself for full legal notices.";

  revision "2021-10-19" {
    description
      "Initial Revision";
    reference
      "RFC XXXX: A Yang Data Model for WSON Tunnel";
    // RFC Ed.: replace XXXX with actual RFC number, update date
    // information and remove this note
  }

 /*
  * Data nodes
  */

  augment "/te:te/te:tunnels/te:tunnel" {
    description
      "Augment with additional parameters required for flexi-grid
       media channel.";
    uses l0-types-ext:l0-tunnel-attributes;
  }

  /*
   * Augment TE label range information
   */

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/te:label-restriction" {
    description
      "Augment TE label range information for the ingress segment
      of the named path constraint.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the egress segment
      of the named path constraint.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the ingress segment
      of the primay path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the egress segment
      of the primay path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the ingress segment
      of the primay reverse path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the egress segment
      of the primay reverse path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the ingress segment
      of the secondary path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the egress segment
      of the secondary path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the ingress segment
      of the secondary reverse path.";
    uses l0-types:l0-label-range-info;
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction" {
    description
      "Augment TE label range information for the egress segment
      of the secondary reverse path.";
    uses l0-types:l0-label-range-info;
  }

  /*
   * Augment TE label.
   */

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects always
      excluded by the path computation with the named path
      constraint.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects included
      or excluded by the path computation with the named path
      constraint.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the ingress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the ingress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-in-segment/"
        + "te:label-restrictions/te:label-restriction/"
        + "te:label-step/te:technology" {
    description
      "Augment TE label range step for the ingress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the egress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:globals/te:named-path-constraints/"
        + "te:named-path-constraint/te:path-out-segment/"
        + "te:label-restrictions/te:label-restriction/"
        + "te:label-step/te:technology" {
    description
      "Augment TE label range step for the egress segment
      of the named path constraint.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects excluded by the path computation of the primary
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects included by the path computation of the primary
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects always
      excluded by the path computation of the primary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects included
      or excluded by the path computation of the primary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the ingress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the ingress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the ingress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the egress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the primay path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:computed-paths-properties/"
        + "te:computed-path-properties/te:path-properties/"
        + "te:path-route-objects/te:path-route-object/"
        + "te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the route object of the computed
      primary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects excluded by the path computation of the primary
      reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects included by the path computation of the primary
      reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-exclude-always/"
        + "te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects always
      excluded by the path computation of the primary reverse
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-include-exclude/"
        + "te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects included
      or excluded by the path computation of the primary reverse
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the ingress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the ingress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the ingress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the egress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the egress segment
      of the primay reverse path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:primary-paths/te:primary-path/"
        + "te:primary-reverse-path/"
        + "te:computed-paths-properties/te:computed-path-properties/"
        + "te:path-properties/te:path-route-objects/"
        + "te:path-route-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the route object of the computed
      primary reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects excluded by the path computation of the
      secondary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects included by the path computation of the
      secondary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects always
      excluded by the path computation of the secondary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects included
      or excluded by the path computation of the secondary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the ingress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the ingress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }
  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the ingress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the egress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the egress segment
      of the secondary path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-paths/te:secondary-path/"
        + "te:computed-paths-properties/"
        + "te:computed-path-properties/"
        + "te:path-properties/te:path-route-objects/"
        + "te:path-route-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the route object of the computed
      secondary path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-exclude-objects/"
        + "te:route-object-exclude-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects excluded by the path computation of the
      secondary reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:optimizations/te:algorithm/te:metric/"
        + "te:optimization-metric/te:explicit-route-include-objects/"
        + "te:route-object-include-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the optimization of the explicit
      route objects included by the path computation of the
      secondary reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-exclude-always/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects always
      excluded by the path computation of the secondary reverse
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:explicit-route-objects-always/"
        + "te:route-object-include-exclude/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the explicit route objects included
      or excluded by the path computation of the secondary reverse
      path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the ingress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the ingress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-in-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the ingress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-start/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range start for the egress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-end/"
        + "te:te-label/te:technology" {
    description
      "Augment TE label range end for the egress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-start-end;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:path-out-segment/te:label-restrictions/"
        + "te:label-restriction/te:label-step/te:technology" {
    description
      "Augment TE label range step for the egress segment
      of the secondary reverse path.";
    case wson {
      uses l0-types:wson-label-step;
    }
  }

  augment "/te:te/te:tunnels/te:tunnel/"
        + "te:secondary-reverse-paths/te:secondary-reverse-path/"
        + "te:computed-paths-properties/"
        + "te:computed-path-properties/"
        + "te:path-properties/te:path-route-objects/"
        + "te:path-route-object/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the route object of the computed
      secondary reverse path.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }

  augment "/te:te/te:lsps/"
        + "te:lsp/te:lsp-record-route-information/"
        + "te:lsp-record-route-information/te:type/te:label/"
        + "te:label-hop/te:te-label/te:technology" {
    description
      "Augment TE label hop for the record route of the LSP.";
    case wson {
      uses l0-types:wson-label-hop;
    }
  }
}


<CODE ENDS>

5. Security Considerations

The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC8446].

The NETCONF protocol over Secure Shell (SSH) specification [RFC6242] describes a method for invoking and running NETCONF within a Secure Shell (SSH) session as an SSH subsystem. The NETCONF access control model [RFC8341] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content.

There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. Considerations in Section 8 of [I-D.ietf-teas-yang-te] are also applicable to the module defined in this document.

Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. Considerations in Section 8 of [I-D.ietf-teas-yang-te]are also applicable to the module defined in this document.

Finally, the YANG module described in this document augments the "ietf-te" YANG module [I-D.ietf-teas-yang-te] by adding data nodes. The security considerations for the subtrees described in those RFCs apply equally to the new data nodes that this module adds.

6. IANA Considerations

It is proposed that IANA should assign new URIs from the "IETF XML Registry" [RFC3688] as follows:


      URI: urn:ietf:params:xml:ns:yang:ietf-wson-tunnel
      Registrant Contact: The IESG
      XML: N/A; the requested URI is an XML namespace.

This document registers following YANG modules in the YANG Module Names registry [RFC7950].


   name:         ietf-wson-tunnel
   namespace:    urn:ietf:params:xml:ns:yang:ietf-wson-tunnel
   prefix:       wson-tnl
   reference:    RFC XXXX

7. Acknowledgements

TBD.

8. Contributors

Dhruv Dhody Huawei Technologies Email: dhruv.ietf@gmail.com

Italo Busi Huawei Technologies Email: Italo.Busi@huawei.com

9. References

9.1. Normative References

[I-D.ietf-ccamp-layer1-types]
Zheng, H. and I. Busi, "A YANG Data Model for Layer 1 Types", Work in Progress, Internet-Draft, draft-ietf-ccamp-layer1-types-13, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-layer1-types-13.txt>.
[I-D.ietf-teas-yang-path-computation]
Busi, I., Belotti, S., Dios, O. G. D., Sharma, A., and D. Ceccarelli, "A YANG Data Model for requesting path computation", Work in Progress, Internet-Draft, draft-ietf-teas-yang-path-computation-18, , <https://www.ietf.org/archive/id/draft-ietf-teas-yang-path-computation-18.txt>.
[I-D.ietf-teas-yang-te]
Saad, T., Gandhi, R., Liu, X., Beeram, V. P., Bryskin, I., and O. G. D. Dios, "A YANG Data Model for Traffic Engineering Tunnels, Label Switched Paths and Interfaces", Work in Progress, Internet-Draft, draft-ietf-teas-yang-te-29, , <https://www.ietf.org/archive/id/draft-ietf-teas-yang-te-29.txt>.
[RFC6241]
Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, , <https://www.rfc-editor.org/info/rfc6241>.
[RFC6242]
Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, , <https://www.rfc-editor.org/info/rfc6242>.
[RFC8040]
Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, , <https://www.rfc-editor.org/info/rfc8040>.
[RFC8340]
Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, , <https://www.rfc-editor.org/info/rfc8340>.
[RFC8341]
Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, , <https://www.rfc-editor.org/info/rfc8341>.
[RFC8342]
Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture (NMDA)", RFC 8342, DOI 10.17487/RFC8342, , <https://www.rfc-editor.org/info/rfc8342>.
[RFC8446]
Rescorla, E., "The Transport Layer Security (TLS) Protocol Version 1.3", RFC 8446, DOI 10.17487/RFC8446, , <https://www.rfc-editor.org/info/rfc8446>.
[RFC8776]
Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin, "Common YANG Data Types for Traffic Engineering", RFC 8776, DOI 10.17487/RFC8776, , <https://www.rfc-editor.org/info/rfc8776>.
[RFC9093]
Zheng, H., Lee, Y., Guo, A., Lopez, V., and D. King, "A YANG Data Model for Layer 0 Types", RFC 9093, DOI 10.17487/RFC9093, , <https://www.rfc-editor.org/info/rfc9093>.
[RFC9094]
Zheng, H., Lee, Y., Guo, A., Lopez, V., and D. King, "A YANG Data Model for Wavelength Switched Optical Networks (WSONs)", RFC 9094, DOI 10.17487/RFC9094, , <https://www.rfc-editor.org/info/rfc9094>.

9.2. Informative References

[I-D.ietf-ccamp-transport-nbi-app-statement]
Busi, I., King, D., Zheng, H., and Y. Xu, "Transport Northbound Interface Applicability Statement", Work in Progress, Internet-Draft, draft-ietf-ccamp-transport-nbi-app-statement-15, , <https://www.ietf.org/archive/id/draft-ietf-ccamp-transport-nbi-app-statement-15.txt>.
[I-D.ietf-teas-actn-yang]
Lee, Y., Zheng, H., Ceccarelli, D., Yoon, B. Y., and S. Belotti, "Applicability of YANG models for Abstraction and Control of Traffic Engineered Networks", Work in Progress, Internet-Draft, draft-ietf-teas-actn-yang-09, , <https://www.ietf.org/archive/id/draft-ietf-teas-actn-yang-09.txt>.
[RFC3688]
Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, , <https://www.rfc-editor.org/info/rfc3688>.
[RFC6163]
Lee, Y., Ed., Bernstein, G., Ed., and W. Imajuku, "Framework for GMPLS and Path Computation Element (PCE) Control of Wavelength Switched Optical Networks (WSONs)", RFC 6163, DOI 10.17487/RFC6163, , <https://www.rfc-editor.org/info/rfc6163>.
[RFC7446]
Lee, Y., Ed., Bernstein, G., Ed., Li, D., and W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", RFC 7446, DOI 10.17487/RFC7446, , <https://www.rfc-editor.org/info/rfc7446>.
[RFC7579]
Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and J. Han, "General Network Element Constraint Encoding for GMPLS-Controlled Networks", RFC 7579, DOI 10.17487/RFC7579, , <https://www.rfc-editor.org/info/rfc7579>.
[RFC7581]
Bernstein, G., Ed., Lee, Y., Ed., Li, D., Imajuku, W., and J. Han, "Routing and Wavelength Assignment Information Encoding for Wavelength Switched Optical Networks", RFC 7581, DOI 10.17487/RFC7581, , <https://www.rfc-editor.org/info/rfc7581>.
[RFC7950]
Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, , <https://www.rfc-editor.org/info/rfc7950>.

Authors' Addresses

Young Lee
Samsung
Seoul
South Korea
Haomian Zheng
Huawei Technologies
H1, Huawei Industrial Base, Songshan Lake
Dongguan
Guangdong, 523808
China
Aihua Guo
Futurewei
Victor Lopez
Nokia
Daniel King
University of Lancaster
Bin Yeong Yoon
ETRI
218 Gaijeongro, Yuseong-gu
Daejeon
Ricard Vilalta
CTTC