Carrier/WAN SDN Commercially Deployed Transport SDN Platform in Action

Features Open Source SDN Software

Carrier/WAN SDN

Challenges & Solution

• [challenge] Complex transport network

environment having multi-

vendor/domain/layer devices

– Controls are closed and distributed over

vendor specific EMSs

• [Solution] Centralize device control and

PCE over multi-vendor devices

Features Open Source SDN Software

T-SDN EMS EMS

MSPP

(A vendor)

MSPP

(B vendor)

OXC

(C vendor)

PTN

(D vendor)

EMS EMS

MSPP

(A vendor)

MSPP

(B vendor)

OXC

(C vendor)

PTN

(D vendor)

EMS EMS EMS

Centralized

Control

E2E Service Provisioning

30% OPEX saving

Carrier/WAN SDN

Challenges & Solution

• [challenge] OPEX increase by

segmented operations

– For E2E service configuration, many

domain operators should participate

– Delayed service deployment

because of manual planning &

provisioning

• [Solution] Simplify and automate

provisioning processes using T-SDN

Receive Order

Path Planning

Provisioning

Svc. Order

Completion

T-SDN

One-Stop

One-Control Receive Order

Path Planning

BSS

Send Work Order to

each domain

Provisioning

Order

Completion

Provisioning

Order

Completion

Svc. Order

Completion

Sys#1

(Order Mgr.)

Sys#2

(Facility Mgr.)

Sys#3

(Work Mgr.)

Sys#4

(EMS)

Sys#3

(Work Mgr.)

Sys#3

(Work Mgr.)

95% Time reduction

Carrier/WAN SDN

Our Architecture

MD-SAL

OSGi Framework

Karaf runtime Data Store

(In-Memory)

Data Broker Clustering Mgr.

PCE Provisioning Path

Designer Topology Mgr.

Inventory Mgr.

Service Functions Service Mgr.

OpenFlow NetConf Corba

SB Protocol Plugins

Northbound API(RESTfull)

Resource

DB

(SQL)

Event Mgr.

Fault Mgr.

GUI

RCA

Statistics

Web Browser Client

Socket

TL-1 SNMP

Client Mgr.

Fault Manager(Legacy NMS) T-SDN Platform

GW Server

AP Server

Client

Controller

3rd Party App • Adopted open source SDN controller

(OpenDaylight Helium Release) – To reduce time and cost for

development

• Integrated with legacy transport NMS – share inventory, topology, and fault

information

• Define Yang Model and use in-memory DataStore for fast path computation – Real-time synchronization for resource

changes

• Adopted MSPP, OXC, and PTN plugins

Carrier/WAN SDN

Demo Scenario I

• Mutually Exclusive Ethernet Path Computation with Service ID

– Using existing service ID, PCE can compute new path for survivability of customer service

Existing Path

New Path MSPP

(A vendor)

MSPP

(B vendor)

MSPP

(B vendor)

MSPP

(A vendor)

OXC

(C vendor)

OXC

(C vendor)

OXC

(C vendor) OXC

(C vendor)

Carrier/WAN SDN

Identify my work

Dualization option

with service ID

Path Computation

with map

Carrier/WAN SDN

• PTN E-LAN Path Computation over multi-administrative domain

– Automatically compute tree-like optimal PseudoWire Path considering PCE conditions such as

hop count, resource availability, load balancing, etc.

A Domain B Domain

LH LH

C Domain

VSI(Virtual Switching Instance)

PW Path

ROADM

PTN

Demo Scenario II

Carrier/WAN SDN

Identify my work

Condition setting

Option setting

Path Computation

Thanks for your interest!

Peter Park, kt (peter.park@kt.com)

JungHyo Lee, kt (junghyo.lee@kt.com)

ChanKyu Hwang, kt (chankyu.hwang@kt.com)

Carrier/WAN SDN

About Korea Telecom

• KT is leading the development of the information and communications industries of Korea since its

foundation in 1981.

• Providing the fastest and most innovative ICT-based telecommunications and convergence services

such as Cloud, IPTV, VoIP, 4G LTE, Broadband, and Fixed Lines.

• Having the largest network infrastructure including Fixed, Mobile, Broadband, Cloud, and etc.

Telephone

20 Million

Broadband

8.2 Million

IPTV

6.3 Million

Biz Ucloud Home Giga WiFi

Mobile

18 Million

Carrier/WAN SDN

Our Solution

• Adopted open source SDN controller (OpenDaylight Helium Release)

– To reduce time and cost for development

– Could get valuable ideas from open source community

– But, why OpenDaylight?

• Stable code started from 2013 and applied to over 34 solution providers

• Many contributors from dominant vendors that can help our plugin adoption for their system

• Simplified and automated E2E service provisioning process

– Optimal Path Calculation over multi-vendor devices

– Visualized Service Planning with map

– Process Automation with BSS/OSS

Carrier/WAN SDN

Concluding Remarks

• T-SDN architecture should be hybrid approach

– cannot avoid dependencies on vendors to cover legacy network

– need vendors’ support for southbound plugins

• Open source SDN controller is helpful for fast and low-cost implementation

– From our views, OpenDaylight is more appropriate for T-SDN

• But, need to develop domain specific applications considering business requirements

– For example, extension of Yang Model for fast PCE

• KT T-SDN will be commercialized in Nov. 2015

– Nationwide deployment in Jan. 2016