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Recent Advances of Communications Technology in China

Explore the advancements in communication technology in China including optical transmission systems, 3G/4G mobile communication, next-gen internet, and networks. Learn about optical fiber deployment, DWDM systems, and the National "863" programs driving innovation.

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Recent Advances of Communications Technology in China

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  1. 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

  2. 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

  3. Current Situation,Prospect and Challenge of CommunicationsNetworks in China

  4. Optical Transmission System

  5. 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

  6. Development of optical communication technology Direction 1：Ultra 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 • 160×10Gb/s、80×40Gb/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

  7. National 863/O-TIME Program O-TIME（Optical Technology for Internet with Multi-wavelength Environment）plan is the national “Tenth five years' project” 863 program’s 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

  8. Key tech, Key module, Experimental system Interconnecting, Test, Milestone achievement System-level tech、 Demonstration of service and application Design、Verify、 Initiation National “863”/O-TIME program roadmap Eleventh five years' project 2001 2002 2003 2004 2005

  9. 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 • Duration：2002---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 objective：Self-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 objective：Build up a practical WAN high performance broadband information network. • Application objective：Realize services and applications related to large-scale concurrent DTV/HDTV broadband stream media, concerned with Internet broadband interactive services.

  10. 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

  11. （1）China Advanced Information Optical Network (CAINONET) National “863” program Accomplished in 2001 （Location：Beijing） 基于SDH的 ATM交换机

  12. （2）National natural science foundation of China network (NSFCNET) National natural science foundation Accomplished in 2001 （Location：Beijing）

  13. 80km 80km 80km STM-256 TM STM-256 TM 80km 80km 80km 80km 80km 80km 480km 80km STM-256 ADM STM-256 ADM STM-256 ADM STM-256 TM STM-256 TM （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. Source：Fiberhome Technology Dual fiber Self-healing ring Point to point transport link

  14. （4）80×40Gb/s DWDM System • National “863” program project, accomplished in 2006. • Develop 80×40Gb/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 80×40Gb/s DWDM Shanghai—Hangzhou practical project. Source：Fiberhome Technology

  15. （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 (C+L 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

  16. （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

  17. （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.

  18. 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 …)

  19. 3G and 4G Mobile Communication Networks

  20. China 3G Mobile Systems • TD-SCDMA • LAS-CDMA

  21. TD-SCDMA • TD-SCDMA as the world’s 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

  22. TD-SCDMA

  23. 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)

  24. 多址码的特性 1----传统CDMA G – Processing Gain • Autocorrelation function  G-1/2 Relative delay • Crosscorrelation function G-1/2 

  25. 多址码的特性 2----LAS-CDMA  Autocorrelation function:  0  Crosscorrelation function:  0  0 0  IFW: Interference free window IFW

  26. 4G System Development-- FUTURE Project

  27. FuTURE –Future Technologies for Universal Radio Environment asa 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.

  28. Insert Pilot STC/SM Mapp. Intl. Coding ST JD DeMap CHE Decod. DeIntl 1 Sub-Channel Transmitter 2 Sub-Channel Transmitter Rx RF Rx RF MC-SFB / IFFT Rx RF A/D A/D A/D 多载波 多载波 TxRF 3 D/A Sub-Channel Transmitter sub - system 多载波 sub - system sub - system …. N Sub-Channel Transmitter Filters Rx/Tx filter Rx/Tx filter Rx/Tx filter MCU Intf Freq. Synth. Antennas 1 Sub-channel Receiver Multi Multi Multi 2 - Sub-channel Receiver - - Rx RF Rx RF MC-AFB / FFT Time & Freq. Synch. Rx RF A/D A/D A/D RxRF filter bank A/D sub - system 3 filter bank Sub-channel Receiver sub - system filter bank sub - system …. Sub-channel Receiver N Interface and Control Baseband RF and Antennas 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

  29. 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

  30. B3G外场试验主要特征 B3G Field Trial characteristics

  31. 典型业务 • 移动高清IPTV • 移动高清视频摄录 • 无线移动视频会议 • 无线移动视频点播 • 无线移动VoIP电话 • 无线移动Web浏览 • 无线移动FTP文件传输 • Services Demo • Wireless IPTV • Wireless Remote Video • Wireless Video Conference • Wireless VOD • Wireless VoIP Phone • Wireless Web Browse • Wireless FTP

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

  33. NEXT GENERATION NETWORK NGN

  34. CN2 – Network TopologyDesigned and Deployed by China Telecom

  35. THANK YOU!

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