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CMA GTS

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Information about CMA GTS
News-Reports

Published on September 27, 2007

Author: Crystal

Source: authorstream.com

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CMA’s new GTS system :  CMA’s new GTS system Submitted by YANG Genlu, China 2004.5 1. Current status of the GTS links at RTH Beijing:  1. Current status of the GTS links at RTH Beijing 2. Current status of the GTS links at RTH Beijing:  2. Current status of the GTS links at RTH Beijing Slide4:  Exeter Sofia Network II (RA VI RMDCN Ext) Melbourne Buenos Aires Tokyo Beijing New Delhi Nairobi Cairo Toulouse Dakar Algiers Moscow Washington Brasilia Network I Offenbach Jeddah Prague 4. GTS system at RTH Beijing:  4. GTS system at RTH Beijing Front End for IP connections UNIX Back End VMS Front End for Non IP connections VMS Offenbach Tokyo Seoul Hanoi Pyongyang Ulan Bator Moscow Bangkok New Delhi Asynchronous circuits X.25 circuits IP over FR MSS PIX RMDCN Routers Cisco 2620 (HSRP) GTS Router Cisco 3640 IP over FR The current GTS system at RTH Beijing Slide6:  RMDCN Front End [Unix base] Front End [Unix base] Back End [Open VMS] Back End [Open VMS] Router for GTS connections Cisco 3640 IOS Ver. 12.1 (2) T Beijing : AS64519 AS64520 Tokyo 211.147.16.130 Host2 Host1 MSS Seoul NAT (Network Address Translation) (MSS)211.147.16.130  Private address AS64770 X.25 Front End (VMS) Front End (VMS) Offenbach Bangkok New Delhi Moscow Pyongyang Asynchronous (75 Baud) Frame Relay Network Hanoi Ulan Bator Slide7:  The CMA’s New GTS System 1. GTS system at RTH Beijing:  1. GTS system at RTH Beijing Offenbach Tokyo Seoul Hanoi Pyongyang Ulan Bator Moscow Bangkok New Delhi Asynchronous circuits X.25 circuits IP over FR Figure 1 .The new GTS system at RTH Beijing (developing) Cisco PIX Firewall RMDCN Routers Cisco 2620 (HSRP) GTS Router Cisco 3640 IP over FR Front End AlphaServer ES40 Duplicated system UNIX based Back End IBM P650 Duplicated system UNIX based MSS Router Cisco PIX Firewall Web Server Internet DMZ The CMA’s new GTS System (1):  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:  The Software structure MSS Operational moniting subsystem Statistics subsystem Files Transaction Web Software facilities of New MSS:  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):  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:  MSS data flow unpack mdp tcop log Mfc rfc bc pack rp lp msg Tcp server cp MSS Processing:  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:  Files Transaction data flow Files Input and Output Methods :  Files Input and Output Methods IP Sockets FTP X.25 Asynchronous E-mail Web The CMA’s new GTS System (3):  The CMA’s new GTS System (3) Key technologies and measures 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 GUI-based 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

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