Current Status of Implementation of MTN at RTH Beijing

Current Status of Current Status of Implementation of MTN at Implementation of MTN at

RTH Beijing RTH Beijing

Li XiangLi Xiang

National Meteorological Information Center, CMANational Meteorological Information Center, CMA

ISS/ICM-MTN & ET-OIISS/ICM-MTN & ET-OI , Geneva , Geneva, , 16-1916-19 MayMay 200 20066 22

GTS linksGTS linksLink toLink to Circuit typeCircuit type SpeedSpeed ProtocolProtocol

OffenbachOffenbach Frame RelayFrame Relay (EQUANT)(EQUANT) 48/48Kbps48/48Kbps WMO FTPWMO FTP

TokyoTokyo Frame RelayFrame Relay (EQUANT)(EQUANT) 48/48Kbps48/48Kbps WMO socketsWMO sockets

FTPFTP

MoscowMoscow Frame RelayFrame Relay (EQUANT)(EQUANT) 8/8Kbps8/8Kbps WMO FTPWMO FTP

New DelhiNew Delhi Frame Relay Frame Relay (EQUANT)(EQUANT) 8/8Kbps8/8Kbps WMO FTPWMO FTP

BangkokBangkok Leased lineLeased line 9.6Kbps9.6Kbps X.25X.25

SeoulSeoul Frame RelayFrame Relay 32/32kbps32/32kbps WMO sockets FTPWMO sockets FTP

PyongyangPyongyang Leased lineLeased line 75 Baud75 Baud ASYNCASYNC

Ulan BatorUlan Bator Leased lineLeased line 14.4Kbps14.4Kbps WMO FTPWMO FTP

HanoiHanoi Leased lineLeased line 75 Baud75 Baud ASYNCASYNC


New UpgradeNew Upgrade• Beijing-Ulan BatorBeijing-Ulan Bator

– Upgraded from 75Baud ASYNC circuit to 14.4kbps IP link in Upgraded from 75Baud ASYNC circuit to 14.4kbps IP link in

February 2005. February 2005.

• Beijing-MoscowBeijing-Moscow

– Upgraded from X.25 to IP over FR in April, 2005. Upgraded from X.25 to IP over FR in April, 2005.

• Beijing-New Delhi Beijing-New Delhi

– Upgraded from X.25 to IP over FR in December, 2005. Upgraded from X.25 to IP over FR in December, 2005.

• Beijing-TokyoBeijing-Tokyo

– Beijing’s incoming PVC being upgraded from 48kbps to 96kbps Beijing’s incoming PVC being upgraded from 48kbps to 96kbps

for receiving satellite data from Tokyo for receiving satellite data from Tokyo


Upgrade planUpgrade plan• Beijing-PyongyangBeijing-Pyongyang

– Upgrade to 64kbps dedicated line in 2006. Upgrade to 64kbps dedicated line in 2006.

• Beijing-BangkokBeijing-Bangkok– tentativetentative plan: move from X.25 to IP in 2006. plan: move from X.25 to IP in 2006.

• Beijing-HanoiBeijing-Hanoi– Upgrade issue being discussed.Upgrade issue being discussed.


Internet connectionsInternet connections

• Beijing-KazakhstanBeijing-Kazakhstan

– established in December 2004established in December 2004

– E-mailE-mail

• Beijing-MelbourneBeijing-Melbourne

– established in February 2006established in February 2006

– WMO FTPWMO FTP


GTS system (1)GTS system (1)

Offenbach

Tokyo

Moscow

New Delhi

Seoul

Ulan Bator

HanoiPyongyang

Bangkok

Asynchronous circuits

X.25 circuits

IP over FR

Cisco PIX Firewall

RMDCN RoutersCisco 2620

(HSRP)

GTS RouterCisco 3640

IP

Front End

• AlphaServer ES40

• Duplicated system

• UNIX

Back End

• IBM P650

• Duplicated system

• UNIX based

MSS

Router

Cisco PIX Firewall

Internet Server

InternetDMZ


GTS system (2)GTS system (2)• ProtocolsProtocols

– FTPFTP– TCP socketsTCP sockets– X.25X.25– ASYNCASYNC– SMTPSMTP

• Maximum length of bulletinsMaximum length of bulletins– Currently,Currently,

• 15Kbytes for message exchange15Kbytes for message exchange

• 500Kbytes for file transfer500Kbytes for file transfer

– January, 2007January, 2007• 500Kbytes (both for message exchange and file transfer)500Kbytes (both for message exchange and file transfer)


GTS system (3)GTS system (3)• Binary messagesBinary messages

– Received messages (T1= H, I, P)Received messages (T1= H, I, P)• BUFR data: AMDAR, SYNOP, TEMP, Satellite data, ……BUFR data: AMDAR, SYNOP, TEMP, Satellite data, ……• GRIB products: AMMC, ECMWF, EDZW, EGRR,KWBC,RJTDGRIB products: AMMC, ECMWF, EDZW, EGRR,KWBC,RJTD• FAX charts: EGRR, RJTD, RUMSFAX charts: EGRR, RJTD, RUMS• Received from Offenbach, Tokyo, Moscow, Melbourne, SeoulReceived from Offenbach, Tokyo, Moscow, Melbourne, Seoul• Relayed to Offenbach, Tokyo, Moscow, Seoul, Ulan BatorRelayed to Offenbach, Tokyo, Moscow, Seoul, Ulan Bator

– Local data and products (T1= H, I)Local data and products (T1= H, I)• NWP products in GRIB codesNWP products in GRIB codes

– SegmentedSegmented for the transmission via TCP sockets for the transmission via TCP sockets– Not segmented for file transfer Not segmented for file transfer

• Satellite data in BUFR codesSatellite data in BUFR codes– SegmentedSegmented for the transmission via TCP sockets and via FTP for the transmission via TCP sockets and via FTP– Not segmented for file transfer Not segmented for file transfer

• Distributed toDistributed to Offenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan BatorOffenbach, Tokyo, Moscow, Melbourne, Seoul, Ulan Bator


Satellite-based servicesSatellite-based services

• CMA’s PCVSAT broadcasting system CMA’s PCVSAT broadcasting system

• Pyongyang, Ulan Bator, Hanoi, YangonPyongyang, Ulan Bator, Hanoi, Yangon

• Available data for the neighboring centersAvailable data for the neighboring centers– GTS data (A/N bulletins, binary messages, fax charts)GTS data (A/N bulletins, binary messages, fax charts)

– CMA’s NWP products (in GRIB codes)CMA’s NWP products (in GRIB codes)

– CMA’s FY satellite data (BUFR products, images)CMA’s FY satellite data (BUFR products, images)

Current Status of Implementation of MTN at RTH Beijing

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