Transcript Status of RTH Hong Kong, China

Features of the new TCP/IP
link between HK and Beijing
(Guangzhou)
Justin Waiman MA
Hong Kong, China
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
Hong Kong – Beijing Circuit
Link established since early 70’s
 Routed through Guangzhou
 Original bandwidth 64kbps DDN link
 IP-based, FTP
 Meteorological data exchange –
global, regional and local
(Guangzhou)

ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
Hong Kong –Beijing Circuit
Hong Kong
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
Khabarovsk
Washington
64K
Part of the RAII
Regional
Meteorological
Telecommunication
Network
Novosibirsk
IMTN-MDCN
CIR<32/768K>
14.4-28.8K (V.34)
via Moscow
14.4-28.8K (V.34)
768K
28.8-9.6K (V.34)
PyongYang
Ulaanbaatar
Tokyo
14.4K
2M
64K
CMA
PCVSAT
EUMETSAT
1M
2M
MPLS 2M
as of 15 December 2007
Beijing
IMTN MDCN
MPLS
IMTN MDCN
MPLS
F/R CIR
<16/16K>
F/R CIR
<32/32K>
2M
Seoul
2M
Offenbach
64K
64K
75
Internet
Macao
CMA
PCVSAT
100
IMTN MDCN
MPLS
128K
F/R CIR
<16/16K>
9.6K
Vientiane
64K
ISDN
128K
1M
Hanoi
Moscow
Yangon
F/R CIR
<16/16K>
Hong Kong
CMA
PCVSAT
Melbourne
F/R CIR
<16/16K>
1200
50
Bangkok
IMTN-MDCN
CIR<16/32K>
Manila
Internet
Phnom Penh
Singapore
F/R CIR
<16/16K>
32K
F/R CIR
<16/16K>
Melbourne
Kuala Lumpur
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
Feature of the new HK-GZ Link
Implemented on 22 May 2008
 4M guaranteed bandwidth both
upstream and downstream
 60 times faster than the original one
 Ethernet based interface
 Bandwidth partitioning by QoS at
router level
 Support Multi-Points solution for
extend to other sites in the future.

ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
HK-GZ GTS network connection
Guangdong Meteorological
Bureau
Hong Kong Observatory
International Ethernet
4M MSTP
4M Metro
Ethernet
CISCO2821
4M
Server
Server
Server
Fire Wall / DMS
Video Conference Unit
Fire Wall
Server
Video Conference Unit
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
HK-GZ GTS network connection

Local access network: Metro-Ethernet

Core network: International Ethernet
• Service delivery over VPLS (Virtual Private LAN Service)
based network
• Layer 2 private network
• Provider network acts as a bridge
• Advantages:



LAN environment
Multipoint to multipoint
Flexible bandwidth allocation which ranges from 1Mbps to
1Gbps
ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008
Physical layer Setting


Technology: SDH (Synchronous Digital
Hierarchical) over optical fibre
Topology: Ring
• High resilience
• Self healing
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 Forward
Being use for real time
meteorological data exchange
 Planned to configure for different
channels for large volume data
exchange (e.g. raw radar data) and
video conferencing

ISS/Expert Team on WIS-GTS Communication Techniques and Structure (ET-CTS)
TOULOUSE, France, 26 - 30 MAY 2008