Recent Advances of Communications Technology in China

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Recent Advances of Communications Technology in
China

• CHEN Junliang
• State Key Laboratory of Networking and Switching
  Technology
• Beijing University of Posts and
  Telecommunications
• August, 2007

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Main Contents

• Current Situation, Prospect and Challenge of
  Communications Networks
• Optical Transmission system
• 3G and 4G Mobile Communication Systems
• Next Generation Internet
• Next Generation Networks

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Current Situation,Prospect and Challenge of
CommunicationsNetworks in China
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Optical Transmission System
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Outline

• Length of optical cable
• Development of optical communication technology
• National 863 / O-TIME Program of China
• National 863 / 3T-Net Program of China
• Introduction to typical demonstrations
• Future prospect

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Development of optical communication technology
Direction 1Ultra high-speed, large capacity,
long-distance transport platform Direction 2
Intelligent, multiple-service and converged
carrier platform

• 4,000,000Km optical fiber laying in China
• 16010Gb/s?8040Gb/s DWDM system applied in
  optical network
• ULH/WDM ultra long-haul optical transmission
  device and system already commercialized
• ASON, MSTP deployed in MAN (Metropolitan Area
  Network)
• EPON applied in more than 20 cities,
  demonstration of FTTH already applied
• Multi-service driven optical access and switching
  has been the focus of research and popularization

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National 863/O-TIME Program
O-TIME(Optical Technology for Internet with
Multi-wavelength Environment)plan is the national
Tenth five years' project 863 programs
research plan for optical communication
technology --Optical TIME program. (2001-2005)
Typical characteristics of O-TIME program Aiming
at the trends and needs of broadband information
network and optical communication technology,
research on optical wavelength technology
supporting Internet multi-wavelength
transmission, taking breakthrough in the four key
high technologies to provide Internet with
high-speed, broadband, flexible, efficient and
intelligent physical transport platform Ultra
long-haul optical transmission
Broadband optical access Node optical switching
Intelligent optical interconnecting network
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National 863/O-TIME program roadmap
Eleventh five years' project
2001
2002
2003
2004
2005
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National 863/3T-Net program
High performance broadband information
networks(3T-Net)

• National 863 program high performance
  information network(3T-Net)
• 3T-Net Tb/s Transport, Tb/s Switching, Tb/s
  Routing
• Duration2002---2006
• Overall objective
• Promote endemic government and network
  operation company to construct next-generation,
  operative, large-scale concurrent multimedia
  service and interactive multimedia services to
  support high performance broadband information
  demo network in the Yangtze River Delta, with the
  help of self-developed new network core
  equipments and application support environments
  of Tb/s level routing, switching and
  transmission.
• Specific objectives
• Technical objectiveSelf-develop core node
  equipments of Tb/s level optical transmission
  systems, Tb/s level intelligent optical networks,
  Tb/s level routing equipments and etc., and
  develop related network application support
  environment.
• Network objectiveBuild up a practical WAN high
  performance broadband information network.
• Application objectiveRealize services and
  applications related to large-scale concurrent
  DTV/HDTV broadband stream media, concerned with
  Internet broadband interactive services.

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National 863/3T-Net program
IPTV Stream media on demand BOD Large capacity
crossover Burst UNI Optical multicast
Yangtze River Delta, China Accomplished in 2006
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(1)China Advanced Information Optical Network
(CAINONET)
National 863 program Accomplished in
2001 (LocationBeijing)
??SDH? ATM???
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(2)National natural science foundation of China
network (NSFCNET)
National natural science foundation Accomplished
in 2001 (LocationBeijing)
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(3)40Gb/s SDH System

• National Tenth five technology
  program,accomplished in 2005.
• Self-develop the first international 40Gb/s SDH
  optical transmission equipment in accordance with
  national standard of ITU-T STM-256 frame
  structure.
• Realize 40Gb/s SDH signal error-free transmission
  over G.652 and G.655 optical fiber.

SourceFiberhome Technology
Dual fiber Self-healing ring
Point to point transport link
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(4)8040Gb/s DWDM System

• National 863 program project, accomplished in
  2006.
• Develop 8040Gb/s DWDM system equipment, 40Gb/s
  optical transmission adopting NRZ code, realizing
  800Km 80x40Gb/s transmission over the G.652
  optical fiber.
• Overcome key technology problems Forward Error
  Correction (FEC), Dynamic Gain Equilibrium(DGE),
  Optical Transceiver Module, 40G OTU, Transport
  code and modulate/demodulate technology, Precise
  chromatic dispersion management technology.
• Build up 8040Gb/s DWDM ShanghaiHangzhou
  practical project.

Source Fiberhome Technology
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(5)160X10Gb/s ultra long-haul optical
transmission system

• National 863 program, accomplished in 2005.
• Self-develop optical transmission system of
  1.6Tb/s, relay transmission distance of
  3000km-5000km (G.652?G.655 optical fiber) without
  electricity provision.
• Build up ULH/WDM network demo project in Xinjiang
  area (1000km relay transmission over G.652
  optical fiber without electricity provision).
• Master completely core technologies of ULH/WDM
  system (CL wavelength band), Raman optical fiber
  amplifier, test and application ...
• Two standard recommendations (D.735?D.736) are
  accepted by ITU-T, leading draft qualification of
  ITU-T G.raman.

Source ZTE
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(6)Large capacity ASON Equipment

• National 863 program, accomplish in 2006.
• Self-develop ASON node devices, supporting
  services of link layer Multicast-ASON and
  Burst-ASON, overcoming ASON large-scale
  hierarchical routing technology.
• Deployed in 863/3T-Net and Telecom networks, also
  applied in Hainan district.
• Multiple recommendations are adopted by ITU-T.

Source Huawei Technology
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(8)Optical Burst Switching Test-bed
Source BUPT, SJTU and so on.
1? National natural science foundation , National
863 program, Burst service based novel optical
switching technology. 2?First domestic institute
(leading in the world) of successfully building
up Optical Burst Switching (OBS) test-bed,
supporting image, voice, data and grid service
access.
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Research direction of future optical
communication technology

• Service-driven, flexible and dynamic architecture
  and technology of optical networks
• Deploying mechanism of optical wavelength
  attributes and application technologies in the
  next-generation network
• Intelligent optical switching and optical
  inter-connecting technology
• Autonomic optical networks and condition
  monitoring (Self-awareness, Self-adaptation,
  Self-organization)
• Intelligence, Packet transmission and Extension
  of MPLS protocol(G-MPLS?T-MPLS?Wireless MPLS...)
• Large-scale broadband optical access application
  technology
• Crossover convergence technology (optics and
  wireless, optics and sensoring, optics and
  service, optics and resource, optics and
  computing )

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3G and 4G Mobile Communication Networks
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China 3G Mobile Systems

• TD-SCDMA
• LAS-CDMA

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TD-SCDMA

• TD-SCDMA as the worlds 3rd 3G mobile system was
  officially accepted by the ITU-R in May 2000
• System works in TDD and uplink synchronous mode,
  supporting asymmetric data transmission
• Series of new technologies are adopted in the
  system

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TD-SCDMA
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LAS-CDMA

• LAS-CDMA Large Area Synchronous CDMA
• The core innovation is the discovery of a group
  of pseudo-random codes called LA/LS codes which
  are capable to decrease the various kinds of
  interferences (Intersymbol interference, multiple
  address interference and adjacent cell
  interference)

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?????? 1----??CDMA
G Processing Gain

• Autocorrelation function

?
G-1/2
Relative delay

• Crosscorrelation function

G-1/2
?
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?????? 2----LAS-CDMA
? Autocorrelation function
?
0
? Crosscorrelation function
?
0
?
0
0
?
IFW
IFW Interference free window
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4G System Development-- FUTURE Project
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• FuTURE Future Technologies for Universal Radio
  Environment as a part of China High-Tech 863
  program.
• Phase 1 Six universities cooperating with six
  companies developed six transmission schemes for
  B3G mobile.
• Phase 2 Jointly develop wireless network
  experimental system supporting both FDD and TDD
  on a common platform.
• Phase 3 Trial Pre-commercial System will be
  developed.

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GMC/OFDM FDD SYSTEM

• 100Mb/s peak uplink and downlink high-speed
  transmission rate
• FDMA and TDMA hybrid multiple access
• Iterative receiving technology
• Distributed radio network architecture
• MIMO-GMC technology in uplink
• MIMO-OFDM in downlink
• MIMO adaptive link transmission technology

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Breakthrough of B3G Theory
B3G TDD Network Architecture

• Flat Radio Access Network
• All-IP based architecture
• Short latency
• Novel Cellular Architecture
• Group Cell
• Slide Handover
• User always in cell center
• Solve smaller cell problem
• Avoid cell edge effect
• Avoid frequent handover
• Enlarge coverage area
• Fully Explore Space Diversity
• Distributed Antenna Array
• Virtual MIMO
• Multi-hop, Relay

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B3G????????
B3G Field Trial characteristics
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• ????
• ????IPTV
• ????????
• ????????
• ????????
• ????VoIP??
• ????Web??
• ????FTP????

• Services Demo
• Wireless IPTV
• Wireless Remote Video
• Wireless Video Conference
• Wireless VOD
• Wireless VoIP Phone
• Wireless Web Browse
• Wireless FTP

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• NEXT GENERATION INTERNET NGI
• Given in the presentation of Prof. MA Yan

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• NEXT GENERATION NETWORK
• NGN

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CN2 Network TopologyDesigned and Deployed by
China Telecom
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THANK YOU!