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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