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Features of the new Features of the new TCP/IP link between TCP/IP link between
HK and Beijing HK and Beijing (Guangzhou) (Guangzhou)
Justin Waiman MAJustin Waiman MAHong Kong, ChinaHong Kong, China
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Hong Kong – Beijing CircuitHong Kong – Beijing Circuit
Link established since early 70’s Link established since early 70’s Routed through GuangzhouRouted through Guangzhou Original bandwidth 64kbps DDN linkOriginal bandwidth 64kbps DDN link IP-based, FTPIP-based, FTP Meteorological data exchange – Meteorological data exchange –
global, regional and local global, regional and local (Guangzhou)(Guangzhou)
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Hong Kong –Beijing CircuitHong Kong –Beijing Circuit
Hong Kong
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Vientiane
Yangon
Hanoi
Phnom Penh
PyongYang
Macao
Seoul
14.4-28.8K (V.34)
64K64K
1200
50
100
9.6K
Offenbach
Moscow
Kuala Lumpur
Novosibirsk
Khabarovsk
Bangkok
F/R CIR<16/16K>
F/R CIR<16/16K>
Washington
64K
Singapore
Hong Kong
F/R CIR<32/32K>
Tokyo
IMTN-MDCN CIR<32/768K>
Manila
ISDN 128K
28.8-9.6K (V.34)
via Moscow 14.4-28.8K (V.34)768K
64K
Ulaanbaatar14.4K
Melbourne
Melbourne
IMTN-MDCNCIR<16/32K>
32K
CMAPCVSAT
64K
75
CMAPCVSAT
CMAPCVSAT
IMTN MDCNMPLS
IMTN MDCNMPLS
IMTN MDCNMPLS
Beijing
2M
2M
1M
2M
1M
128K
Internet
Internet
F/R CIR<16/16K>
F/R CIR<16/16K>
F/R CIR<16/16K>
F/R CIR<16/16K>
EUMETSAT
MPLS 2M2M
Part of the RAII Regional Meteorological Telecommunication Network
as of 15 December 2007
Feature of the new HK-GZ Link
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Implemented on 22 May 2008Implemented on 22 May 2008 4M guaranteed bandwidth both upstrea4M guaranteed bandwidth both upstrea
m and downstreamm and downstream 60 times faster than the original one60 times faster than the original one Ethernet based interfaceEthernet based interface Bandwidth partitioning by QoS at router Bandwidth partitioning by QoS at router
levellevel Support Multi-Points solution for extend Support Multi-Points solution for extend
to other sites in the future.to other sites in the future.
Guangdong Meteorological Bureau
International International EthernetEthernet
Hong Kong Observatory
ServerServer
Video Conference UnitVideo Conference Unit
4M MSTPCISCO2821CISCO2821
Fire WallFire WallServerServer
Video Conference UnitVideo Conference Unit
Fire Wall / DMSFire Wall / DMS
4M Metro Ethernet
4MServerServer
ServerServer
HK-GZ GTS network connectionHK-GZ GTS network connection
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Local access network: Metro-EthernetLocal access network: Metro-Ethernet
Core network: International EthernetCore network: International Ethernet• Service delivery over VPLS (Virtual Private LAN Service) Service delivery over VPLS (Virtual Private LAN Service)
based networkbased network• Layer 2 private networkLayer 2 private network• Provider network acts as a bridgeProvider network acts as a bridge• Advantages:Advantages:
LAN environmentLAN environment Multipoint to multipointMultipoint to multipoint Flexible bandwidth allocation which ranges from 1Mbps to Flexible bandwidth allocation which ranges from 1Mbps to
1Gbps1Gbps
HK-GZ GTS network connectionHK-GZ GTS network connection
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Technology: SDH (Synchronous Digital Hierarchical) oTechnology: SDH (Synchronous Digital Hierarchical) over optical fibrever optical fibre
Topology: RingTopology: Ring• High resilienceHigh resilience• Self healingSelf healing
Physical layer Setting
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Physical layer
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
Current Status and Looking ForwardCurrent Status and Looking Forward
Being use for real time Being use for real time meteorological data exchangemeteorological data exchange
Planned to configure for different Planned to configure for different channels for large volume data channels for large volume data exchange (e.g. raw radar data) and exchange (e.g. raw radar data) and video conferencing video conferencing
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)TOULOUSE, France, 26 - 30 MAY 2008
