Download ppt - WMO

CMA’s new GTS
system
Submitted by YANG Genlu, China
2004.5
1. Current status of the GTS links at RTH Beijing
Link
Speed
Beijing-Offenbach
Protocol
Data
Remarks
48/48Kbps(FR) FTP
AN,Binary,
Fax
Upgraded to IP link and connected to
RMDCN in April 2003
Beijing-Tokyo
32/32Kbps(FR) TCP Sockets
AN,Binary,
Fax
Connected to RMDCN in February 2004.
Beijing-Seoul
32/32Kbps(FR) TCP Sockets
AN,Binary,
Fax
Upgraded to IP link in August 2002
Beijing-Moscow
7.2-28.8Kbps
(V.34)
X.25
AN, Fax
Migration to IP planned
BeijingKhabarovsk
7.2-28.8Kbps
(V.34)
Beijing -> X.25 > Moscow -> IP
-> Khabarovsk
AN
Via Moscow
Beijing-Bangkok
9.6Kbps
X.25
AN
Migration to IP planned
Beijing-New Delhi
9.6Kbps
X.25
AN
Migration to IP planned
Beijing-Hanoi
75 baud
ASYNC
AN
PCVSAT receive-only station installed
BeijingPyongyang
75 baud
ASYNC
AN
PCVSAT receive-only station installed
Beijing-Ulan Bator
75 baud
ASYNC
AN
PCVSAT receive-only station installed
2. Current status of the GTS links at RTH Beijing
Moscow
Offenbach
7.2-28.8K (V.34)
Khabarovsk
Frame Relay
CIR 48/48K
Tokyo
Frame Relay
CIR 32/32K
7.2-28.8K (V.34)
Ulan Bator
Pyongyang
Frame Relay
CIR 32/32K
Beijing
75
baud
75
baud
9.6K
Bangkok
9.6K
75
baud
Hanoi
Seoul
New Delhi
128K
Macao
64K
Hong Kong
The Improved MTN
I.2004
Network I
Beijing
Tokyo
Melbourne
Washington
Moscow
Prague
Brasilia
Buenos Aires
New Delhi
Offenbach
Exeter
Network II
(RA VI RMDCN
Ext)
Toulouse
Dakar
Jeddah
Nairobi
Sofia
Cairo
Algiers
4. GTS system at RTH Beijing
IP over FR
Offenbach
RMDCN Routers
Cisco 2620
(HSRP)
Front End for IP
connections
•UNIX
Tokyo
PIX
GTS Router
Cisco 3640
IP over FR
Back End
•VMS
Moscow
X.25 circuits
Front End for Non IP
connections
VMS
Bangkok
New Delhi
Asynchronous circuits
Hanoi
Pyongyang
MSS
Ulan Bator
The current GTS system at RTH Beijing
Seoul
Tokyo
Offenbach
New Delhi
Bangkok
Seoul
AS64520
AS64770
Moscow
Frame Relay
Network
RMDCN
Hanoi
X.25
Ulan Bator
Pyongyang
Asynchronous
(75 Baud)
Router for GTS connections
Cisco 3640
IOS Ver. 12.1 (2) T
Front End
(VMS)
Front End
(VMS)
Beijing : AS64519
211.147.16.130
MSS
Host1
Front End
[Unix base]
Host2
Front End
[Unix base]
NAT (Network Address Translation)
(MSS)211.147.16.130  Private address
Back End
[Open VMS]
Back End
[Open VMS]
The CMA’s New GTS System
1. GTS system at RTH Beijing
DMZ
Internet
Web Server
Cisco
PIX Firewall
Back End
•IBM P650
RMDCN Routers
Cisco 2620
(HSRP)
IP over FR
GTS Router
Cisco 3640
IP over FR
Tokyo
Offenbach
Cisco
PIX Firewall
•Duplicated system
• UNIX based
Moscow
Front End
X.25 circuits
• AlphaServer ES40
• Duplicated system
• UNIX based
Bangkok
New Delhi
Router
Asynchronous circuits
MSS
Hanoi
Pyongyang
Ulan Bator
Figure 1 .The new GTS system at RTH Beijing
(developing)
Seoul
The CMA’s new GTS System
(1)

Hardware and Network
The data communication system and the Message
Switching System (MSS) are two separate
systems. Each system is a duplicated system.
Moreover, in order to provide real-time
meteorological data to national and international
users, the Internet web site environment is set up
independently.
The Software structure
Files
Transaction
Statistics
subsystem
MSS
Web
Operational
moniting
subsystem
Software facilities of New MSS

Front end
 collecting and transmitting data via GTS links.
 Supporting FTP, TCP sockets, X.25, Asynchronous
 Files switching
 Files naming conversation

Back end
 checking data
 packaging messages and files
 distributing data to the other internal operational systems, such as real-
time database.

Operational monitor system
 monitoring and managing the application system
 C/S based software
 running on Linux based PCs
The CMA’s new GTS System
(2)

Application Software
The application software of the new GTS system consists of three
subsystems, i.e., communication subsystem, MSS and operational
monitoring subsystem. The communication subsystem, supporting
diversified circuits and various protocols, collects data from GTS and
relays them to MSS where data recognition, archiving and distributing
to the other internal operational systems, such as domestic
communication system and real-time database system, is
accomplished . At the same time , MSS provides national and
international data as operational requirements to communication
subsystem where data distribution via the appointed GTS circuits is
completed. A lot of operation condition of the CIMCS, such as data
transmission and system operation, are performed by the operational
monitor subsystem .
MSS data flow
mdp
tcop
unpack
Mfc
rfc
bc
pack
log
rp
msg
lp
Tcp server
cp
MSS Processing






source from ftp server and files server
Domestic data reediting to WMO standers
Data is identified by WMO heading
Data stored in a receive queue along with
information retrieved from a routing catalogs
Data written to transmit queue based on
routing catalogs information
Data sent to files server
Files Transaction data flow
TCP IN
FTP IN
Local files distribution
Files
Server
Local
distribution
TCP OUT
files
FTP OUT
Files Input and Output Methods
IP Sockets
 FTP
 X.25
 Asynchronous
 E-mail
 Web

The CMA’s new GTS System
(3)

Key technologies and measures
a.
Migration of MSS software. VMS platform will be replace by UNIX platform in the new
GTS system. So, it is necessary to make a thorough analysis of MSS software, and
move its core technologies and functions to UNIX-based system.
Development of GUI-based monitor system .A completely new and opened GUIbased monitor system will be developed .
Adjusting data flow and re-organizing operation. The principal data transmission node
will be changed from a message basis to a file basis. The relevant adjustment will also
be made on such aspects as data flow and operation organization , management and
running .
Establishing a close connection between the current domestic communication system
and the third generation CIMCS. Due to some historical reasons, CMA’s domestic
comm. System and its international comm. System are two separate systems, and
running on two different platforms. However , it is inevitable that the real-time data
and products need exchanging and sharing between the two system. Thus ,the
functions and features
b.
c.
d.