chunghwa telecom co. ltd. chunghwa telecom labs
TRANSCRIPT
1Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Kou-Sou Kan (Ph.D)*, Cheng-Dow Hwang, Chi-Shi Liu, Bing-Shan Crien,Yin-Hwa Huang, Her-Hsiung Chang, Ta-kang Ju
* ChungHwa Telecom Co., Ltd.TeleCommunication Laboratories
Internet & Multimedia Application Tech. Lab.Researcher, 342 Project Manager
12,Lane 551, Min-Tsu Road Sec. 5Yang-Mei, Taoyuan, Taiwan 326, R.O.C
TEL:886-3-4244782;FAX:[email protected]
Video Streaming Service Trial Video Streaming Service Trial over ADSL-Based Telephone Networksover ADSL-Based Telephone Networks
2Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Content
1. Background and Trial Objects
2. MOD Trial system Architecture
3. MOD Major Components
4. Streaming service present Status
5. Conclusion
3Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Background-Crisis
Traditional Voice Service Income is SaturatedTelecom Deregulation Policy Impact Mobile Phone Service is opened since 19963 new competitorsMarket occupation drop to 29%Income drop to 36%Telecomm. Service is opened since 19993 new competitors International call drop 30%
Bandwidth limitation of Twisted pair loop Dialup Internet block the telephone service Difficult to provide high bandwidth multimedia service
4Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Background-Crisis
Service Competition from Cable Company
2 major competitors
Widely deployed coaxial cable to cities and communities
Internet service at the speed more than 10 Mbps with cable modem
Hold most of the cable TV channel license
5Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
The largest Twisted Pair Access Loop OwnerPrimary asset of old telecom.Over 12 million lines
Access Loop upgrade with ADSLAggressive deployment over 1 Million ADSL lines on 2001Additional 1.25 Million Lines will be installed on 2002
The largest internet service providerOver 1 million ADSL users and 3 million dialup users 85 % Market Occupation ADSL can break the barrier for MM on InternetProvides a second line service on the same twisted pair
Sufficient capacity for multimedia services especially for video
No impact on the telephony service on the same line
BW asymmetry suited for consultation and client-server applications
Background-Opportunities
6Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Verify ADSL network high speed streaming stability& reliability
Seek out the commercial multimedia system architecture solutions
Trial Objects
7Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
MOD Trial system Architecture
ADSLModem10 BT
ADSLModem10 BT
.
.
.
RouterInternet
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.
.
AMX (User)AMX (Internet)
AMX (Video Stream)
10 BT*MVideoServer
10 BT*N
CommonController
OC3
OC3
OC3
OC3
VPX
AMX (User)
ADSLModem10 BT
ADSLModem10 BT
POTS
POTS
POTS
POTS
.
.
.
ServiceManager
Network Manager
Video Server :Karaoke ServerPay-Per -View Server
Digital Broadcasting TV Server
ATU-C RACK
Program Downloading Server
LAN
ADSLModem10 BTADSLModemADSLModem10 BT
ADSLModem10 BTADSLModemADSLModem10 BT
.
.
.
RouterInternet
.
.
.
AMX (User)AMX (Internet)
AMX (Video Stream)
10 BT*MVideoServer
10 BT*N
CommonController
OC3
OC3
OC3
OC3
VPX
AMX (User)
ADSLModem10 BTADSLModemADSLModem10 BT
ADSLModem10 BTADSLModemADSLModem10 BT
POTSPOTS
POTSPOTS
POTSPOTS
POTSPOTS
.
.
.
ServiceManager
Network Manager
Video Server :Karaoke ServerPay-Per -View Server
Digital Broadcasting TV Server
ATU-C RACK
Program Downloading Server
LAN
8Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Residential ADSL loops in central Taipei city Phase 1 1996~1998Subscriber number 28T1-based ADSL Down stream is 1.5 Mbps,upstream is 9.6Kbps through RS232 Phase 2 1998~2000Subscribe number is increased to 400 Uniformly distributed within 7 End Office (EO) 48 to 64 subscribers per EO Video services are decoded by STB and presented on TVPC based High speed Internet accessADSL downstream is 1.5 Mbps and upstream is 74 Kbps.
MOD Trial system Architecture
Trial Historical informationTrial Historical information ::
9Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
High speed internet accessdownstream 1.5 Mbps upstream 72Kbp
Near-Video-On-Demand (NVOD)Multicast 1.5 Mbps MPEG-1 180 channel(~ 8 movies)
Live TVMulticast 1.5 Mbps MPEG-1 30 channels of cable TV program
Karaoke-On-Demand (KOD)Unicast 1.5 Mbps MPEG-1 stream32 channels
MOD Trial system Architecture
Trial ServiceTrial Service ::
10Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Core switch(VPX)Setup a QoS connection between customer and video serverATM switch 32×32 5 Gbits(OC-3c per port )Common Controller of VPX (VPX-CC) manages the PVC connections multicast and unuicast connections of the VPX and the AMX.
ATM Multiplexer(AMX) Provide STM-1 to 10 BASET termination between the VPX and ATU-C16 lines of 10 BASET ports for single AMX 7 AMXs are deployed at distant EO to provide at most 448 users
Service management System(SMS)The portal site Relay PVC connection request of IGMP multicast and unicastMonitor the system operating statusComponent failure Alert
MOD Major Components
11Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
ATU-C LiveTV
MOD Major Components
12Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
AMX and ATM Switch
MOD Major Components
13Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
NVOD
MOD Major Components
14Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
KOD STB
MOD Major Components
15Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Trail Experiences
Scalable issue of ATMMulticast protocol is proprietary for special purpose Automatic routing for new service is requiredSVC or PVC issue(connection and disconnection respond time)QoS requires PVC connection
Mesh connection is required for each service type to guarantee QoSAlmost all internet service is IP basedATM are layer2 serviceLayer 3 and Layer 2 protocols translation(SAR)for IP service
ADSL bandwidth is limited within certain connection distanceVBR cause packet lostStreaming service must be restricted to CBR
16Chunghwa Telecom Co. Ltd. ChungHwa Telecom LabsNetwork & Multimedia Lab
Conclusion
GSR is suitable for IP based multimedia serviceScalable expansion for both subscriber and service Very flexible for new service creationAutomatic Routing rule
Over-engineering to overcome the QoS issueDistribution of service platform to multiple EOs Disperse the traffic load from backbone to local
Content related issues are essentially importantManagement and delivery mechanism(CDN)Conditional access, encryption,decryptionDigital Rights Protection(DRM)Retrieval, Segmentation, Indexing, SortingFormat transformation