3TNet: High Performance
Broadband Information
Network in China
Yaohui Jin
jinyh@sjtu.edu.cn

State Key Lab of Advanced OpticalCommunication Systems and Networks,
Shanghai Jiao Tong University,
Shanghai, China
JGN2+AKARI Symposium 2008, Tokyo

Outline Project Network Architecture Field Trial
 Summary

JGN2+AKARI Symposium 2008, Tokyo2

Challenges
 The bandwidth of “broadband” provided by carriers istypically 1-2 Mb/s based on xDSL technologies today. It
cannot satisfy the requirement of high quality videoservices.
 When the access bandwidth is increased drastically,
what’s the impacts to the core network?
 Cabled TV network, which is uni-directional withoutinteraction, upgrades to bidirectional difficultly.
 The reliability of Internet is less than that of telephone
network (five 9’s). Furthermore, Internet is vulnerable
by DDoS, worms, and viruses. It takes risks in using theInternet for mission-critical operations.
JGN2+AKARI Symposium 2008, Tokyo33TNet Project It aims to build a high performance trial network tosupport large-scale concurrent streaming media andinteractive multimedia broadband service.
 It employs Tbps network equipments developed by
Chinese vendors, collaborates with carriers and service
providers, develops new business model, and deploys inYangzte river delta with supports by local government.
 The project was funded by “863” Program, ~35M USD.
2002
Initiation

2003-2004
Specification
Development

2005
Field
Trail

2006
Finished

JGN2+AKARI Symposium 2008, Tokyo

2007
Next
Phase

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Participants Carriers and SPs:
China Telecom, Shanghai
TV, CETV, B-Star Venders:
Huawei, Fiberhome, ZTE,Harbor, Amoi, …

 Universities:
Tsinghua U. PKU, Fudan U.,
SJTU, ZJU, USTC…

 Institutes:
CAS (IoA), RITT, ABS

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A Layered View of 3TNet
3TNet is a circuit-switched and packet-switched hybrid network
to support large-scale interactive broadband streaming media.

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Field Trial in Yangtze River DeltaYangtze
River Delta
is a region
includingShanghai,
Jiangsu,andZhejiang.

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3TNet Topology
Nanjing, SEU,
5000 users

Head End,
100 Channels(includingHDTV), 3,000
hrs VoD

Hangzhou, ZJU,
5000 users

China Telecom,
1000 FTTHHouseholdsB-Star,12000Households

SJTU, 5000 user

1 operation center, 2 network TV stations, ~28000 real users in 3 cities.
3Tnet provides 45Mb/s guaranteed bandwidth for each end user.
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Long Distance Links
NanjingShanghai

W
DMD ShanghaiHangzhou
Installed 4*40Gb/s DWDM
Upgradable to80*40Gb/s
DWDM
 ShanghaiNanjing
2*10 Gb/s

Hangzhou

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ASON Layer Topology

13 SDH based OXC nodes
GMPLS control plane
Two domains

Fiberhome’s
Fonsweaver 780Huawei’sONS9500

JGN2+AKARI Symposium 2008, Tokyo

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IP Layer Network Topology SR: switching router, TSR: Tb/s SR, Huawei’s Quidway NE80
 ACR: access convergence router, Huawei’s Quidway ME60
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Value-Added Service: E-Shanghaie-Learning
e-Entertainment
e-Healthe-Show
e-Science

University
Community

Braodband
Network(3TNet)

MuseumHospital

TV Station

1. Hybrid Multicasting: Y. Jin, ECOC 2007 (Invited)
2. Distributed Computing over ON: W. Guo, OFC 2008 (Invited)
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What’s the next?
 New Generation Dependable Network~64M USD, 2008-2010
First round call for proposal:
http://www.most.gov.cn/tztg/200711/t20071107_57004.htm

 Network architecture

Core: Optical Transport NetworkODU 1/2 grooming, wavelength switching (ROADM)

Aggregation: Packet Transport Network (T-MPLS, PBT)
Routing: Reconfiguration, Virtualization, etc.

Access: WDM-PON, WiMax, Ethernet over Coax, …
App. & Service: Collaborative HD Video Editing, Network
3DTV, …

 Experiments
National broadband network and service testbed

International collaboration and internetworking
JGN2+AKARI Symposium 2008, Tokyo13

Summary 3TNet is a circuit-switched and packet-switchedhybrid network to support large-scale inactive
broadband streaming media.
 A large-scale field trial is now carrying out inYangtze River Delta. There are ~28000 realusers in 3TNet. The average bandwidth of eachend user reaches up to ~45 Mb/s.
 3TNET is going to be upgraded and deployed inscale in China in the next three years (beyond3TNET).
 International collaboration is warmly welcome!

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Thanks
jinyh@sjtu.edu.cn

JGN2+AKARI Symposium 2008, Tokyo