Operation & Management of KT ADSL Networks

Operation & Management of KT Operation & Management of KT ADSL NetworksADSL Networks

KTOSS Lab.

Dongsik Yundsyun@kt.co.kr

KTOSS Lab.

Dongsik Yundsyun@kt.co.kr

2002-10-07 2

Table of Contents

Overview of KT ADSL Networks and ServicesMajor consideration points of ADSL operation & managementKT ADSL Management System Architecture

Characteristics of KT ADSL Management System

Remarks

2002-10-07 3

Overview of KT ADSL – Network Topology

NAS

ATM

KORNET

DSLAM

1 4 7 2

ADSLModem

ADSL Line

DSLAM

DSLAM

1 4 7 2

ADSLModem

ADSL Line

RadiusServer

ONU HDTFLC-C/D

1 4 7 2

ADSLModem

ADSL Line

ONU HDTFLC-C/D

APTDSLAM

DSLAMDSLAMCompany A

(Head)

Company A (Branch)

2002-10-07 4

Overview of KT ADSL – Services

YesSooner or later

YesYesYesYesYesIn-Service

IP VPN(L2TP

Configuration)

IPoA(Up to 21 or more

IP Addresse

s)

PPP(Up to 16 Sessions

for an Access Line)

IPoA(Up to 13

IP Addresse

s)

EoA(Up to 3

IP Address

es)

PPP(1Mbps Down

Speed)

PPP(2Mbps Down

Speed)

Characteristics

ADSL-VPN

HDSL/SDSL

HomeNet/

OfficeNet

Multi-IPMy-IPAdsl-Lite

Adsl-Premium

Service Class

Wireless LAN Access Service (NeSpot) is now available

2002-10-07 5

Overview of KT ADSL – Key Success Factors

Residential TypeHighly populated (apartment : house=50%:50%)In Seoul, Goung-Gi and Busan, Apartment is about 65%Most demand are concentrated in Seoul, Goung-Gi, Busan(about70%)

Under high competition (KT, HANARO, ThruNet etc)Local loop distance

Social effectsOn-line stock tradingOn-line gaming

Appropriated OSS supports

Distance ~ 2km ~ 3km ~ 4km ~ 5km

distribution 42 % 36 % 17 % 5 %

2002-10-07 6

Overview of KT ADSL – Subscribers

0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

4,000,000

1999.4월

7월 10월 2000.1월

4월 7월 10월 2001 1월

4월 7월 10월 2002년1월

4월

Introduce ADSL OSSIntroduce ADSL OSS

2002-10-07 7

Major Consideration Points of ADSL O&M

Co-existent with legacy POTSShare cooper-wire with Data and VoiceAdditional MDF work will be necessaryMaybe Service Management has problem

One Work Order required for POTS and ADSLPOTS service ordering system relationshipPOTS service management system (Service Assurance System) relationship

Various order change cases are existLarge-scale service order transaction

20,000 ~ 35,000 order per day in KTHard to find trouble points

PC, ADSL-modem, local loop, DSLAM, ATM, B-RASMulti-vendor Environment

7 type of DSLAM, 4 type of B-RAS in KT

2002-10-07 8

KT ADSL O&M System Architecture

Internet(KORNET)

ATM

Transmission Network/Dedicated Line Network

Access Network

Service Configuration Management Service Assurance Management

Network Management

Subscriber Data Management System

(SDMS)

Subscriber Data Management System

(SDMS)

Telecom-service Integration Management System

(TIMS)

Telecom-service Integration Management System

(TIMS)

Access Network Support & Warranty

for End Resources(ANSWERS)

Access Network Support & Warranty

for End Resources(ANSWERS)

ATM-NMSATM-NMS

KornetNMS

KornetNMS

NASNMSNASNMS

2002-10-07 9

Service Configuration Management System

Developed ADSL ordering system (SDMS)Modify legacy POTS configuration management system to handle ADSL service (TIMS)ADSL Service Configuration works are very complex, but ADSL is very cheap and popular service, so automation systems are needed.The complicated ADSL service configuration structure between heterogeneous domains.

BSS (order entry & Billing)Already-established wired telephony access network.ATM-based transmission network.Internet facilities domains.

Complex order handling featureChange order before complete the previous order processing (more 60% of total order)

PSTN number changeInstall location change (move in/out)Internet ID changeService type change

Large-scale service order transactionDevelopment the KT proprietary work-flow engine.

2002-10-07 10

Software Architecture of SDMS

SDMS

BSS BSS

BSS_IFBSS_IF

Workflowrules

Workflowrules ActivityActivity

Process Engine

Working part

Process Engine

Working part

uniCuniC authenCauthenC atmCatmC ipCipC masterCmasterC

User interface

NASNAS ATM NMSATM NMSRadius Server Radius Server TIMS TIMS

CORBA

b-rasCb-rasC

CLISQLSQL CORBA

2002-10-07 11

Service Assurance System

Modify legacy POTS Service Assurance Management system to handle ADSL service (ANSWERS)

One-stop interface to customerSupport unified customer interface for POTS and ADSLImmediately testing function

Integrated Line Test Functions for copper and broadband access networks

Equipped with copper line testersInterfaces with various elements such as ESS(POTS Switch), FLC (Fiber Loop Carrier) and DSLAM

Interworking with B-RAS Management System

2002-10-07 12

ADSL Testing

KORNET

Customer PCATU-R

DSLAM NAS

ONU

HDT

ATU-R

Customer PC

ANSWERSFLC-EMS

DSLAM-EMS

ATM LB Test

ATM LB Test

PM

Port ResetPort related

Alarm

Analog Test

B-RAS-NMS

B-RAS state check

DSLAM-NAS link & port state check

2002-10-07 13

Network Management Systems

ATM

KORNETRadiusServer

1 4 7 2

ADSLModem

ADSL Line

ONU

HDT

FLC-C/D

DSLAM

B-RAS

NASEMS

ATMEMS

ATMEMS

FLCEMS

DSLAMEMS

ATM VP PVC

ATM NMS NAS NMSTIMS ANSWERS

KornetNMS

2002-10-07 14

Remarks

OSS is major success factor for ADSL business in KTLarge-scale order processing – Service Configuration Management SystemCustomer trouble handling – Service Assurance Management SystemManagement the multi-vendor/multiple technology networks –Network Management System

Various services supports ADSL and other high-speed internet services

Ethernet-based service (Ntopia)Wireless-LAN access service (NeSpot)IP-based xDSL servicesFuture value added services

Children protection serviceVoD service