IMTN and managed data network services

Technical Conference on the WIS (Seoul, 6-8 November 2006)

Hiroyuki ICHIJO (Japan Meteorological Agency

MTN configuration

Melbourne

W ashington

Exeter

N ew Delhi

Beijing

J eddah

N airobiDelhi

Dakar

Algiers

Buenos Aires

Brasilia

Moscow

Cairo Tokyo

SofiaPragueToulouse

Off enbach

Region IIRegion VI

Region I Region V

Region IV

Region III

The Main Telecommunication Network (MTN) interconnects 6 RegionalMeteorological Telecommunication Networks (RMTNs) as a core of the GTS. The MTN consists of 18 MTN Centres and 25 connections.

Strategies to improve the GTS

Strengthen the overall GTS capabilitieswith cost-effectiveness and technical trends

Migration to TCP/IP

Use ofcost-effective

network services Strategies

Leased circuits Legacy protocols Traditional GTS

Improved GTS

• Internet like applications• Saving implementation costs and human resources• allowing latitude in selecting a network service

• Expanding bandwidth• Flexible connectivity• Saving recurrent cost

Layer separation approach to the improved GTS

Message Switching

Message Switching

Server/client Server/client

File transfer File transferApplication layer

Transport layer

Frame Relay

IP-VPN

Transmissionprotocol layer

Use of network services

Migration to TCP/IP

Adding applications

Legacy protocol Legacy protocolTCP/IP TCP/IP

Concepts of IMTN The CBS, at its 1998 extra-ordinary session, stressed that The CBS, at its 1998 extra-ordinary session, stressed that the MTN shall be reviewed fundamentally to meet evolving the MTN shall be reviewed fundamentally to meet evolving data exchange requirements of WMO Programmes other than data exchange requirements of WMO Programmes other than the WWW. The IMTN project has been promoting the reform the WWW. The IMTN project has been promoting the reform of the MTN capability as a genuine network since its of the MTN capability as a genuine network since its commencement in 1999. commencement in 1999. Reform concepts are:Reform concepts are:

(1) to provide capability and flexibility to meet new and future (1) to provide capability and flexibility to meet new and future requirements by using technical innovation;requirements by using technical innovation;

(2) to seek cost-effectiveness with appropriate reliability and (2) to seek cost-effectiveness with appropriate reliability and security;security;

(3) to challenge establishment of a collaborative contractual (3) to challenge establishment of a collaborative contractual framework;framework;

(4) to keep up with an appropriate pace for implementation, (4) to keep up with an appropriate pace for implementation, i.e.i.e.

“ “early implementation leads early benefits.” early implementation leads early benefits.” A point of implementation strategy is the evolutionA point of implementation strategy is the evolution from bilateral physical circuitsfrom bilateral physical circuits to logical connections through seamless network to logical connections through seamless network “cloud”. “cloud”.

Status of the IMTN project

The current IMTN is structured with two “clouds” of Frame Relay network services.• 17 of 25 MTN circuits are in operation on the Clouds.• 12 of 18 MTN centers participate in the Clouds.

Exeter

SofiaMelbourne

Buenos Aires

TokyoBeijing

Nairobi

Washington

Cloud ICloud I

Jeddah

Prague

Toulouse

Dakar Algiers

Offenbach

Brasilia

Cairo

New DelhiMoscow

Cloud IICloud II

Details of Cloud I

1.5Mbps

256kbps

256kbps

　

Primary PVCBoM Backup PVC

Access circuit 1.5Mbps

256kbps

Exeter

MelbourneDisaster Recovery

Site Brisbane

Tokyo

Washington

768k

32k

32k

16k

64k64k

32k

32k

32k

CIR in each direction [bps]

32k

16k16k

16k16k

16k16k

16k16k 4k4k

4k4k

BT Frame RelayBT Frame Relay

• Logical connections (PVC: Permanent Virtual Circuit) through BT Frame Relay network

• Configuration of asymmetric bandwidths by CIR (Committed Information Rate) for unbalanced traffic conditions

• Arrangement of backup re-routing with a dynamic routing protocol (BGP-4)

Unbalanced traffic and asymmetric CIRs (Cloud I)

1076 Mbytes/day

40% of CIR

25 Mbytes/day

55% of CIR

Each pays forits local access circuit and an incoming CIR

CIR=32kbps

CIR=768kbps

Tokyo Washington

1.5Mbps1.5MbpsFR

Backup Re-routing (Cloud I)

Cloud IWashingto

n

Melbourne

Tokyo

Link Link failurefailureBGP-4

Traffic on normal condition

BGP-4 Bypass trafficfor backup

Details of Cloud II• PVCs through OBS (Orange Business Service, former

EQUANT) Frame Relay network under expansion of the European contract

•Centralized network monitoring by ECMWF & Consumer Premise Equipment (CPE, Cisco Router) managed by OBS

• Configuration of asymmetric bandwidths by CIR

　

Cloud IICloud II

By OBSBy OBS

Moscow

32k

16k 8k

8k48k 96k

16k 8k

32k48k

384k

64k

16k

16k

8k

8k

New Delhi

Jeddah

64kbps

512kbps

256kbps256kbps128kbps

64kbps1024kbps

2048kbps

512kbps

256kbps

Sofia

Prague

Exeter

ToulouseOffenbach

Tokyo

Beijing

128k

64kCPE

CPECPE

CPE CPE

CPE

CPE

CPECPECPE

Collaborative contract (Cloud II)

Network service provider

(OBS)MasterContract

Customer representativ

e(ECMWF)

Regional network in EuropeRegional network in Europe

(RMDCN in Region VI)(RMDCN in Region VI)

AccessionAgreement

AccessionAgreement

AccessionAgreement

NetworkNetworkmonitoringmonitoring

IMTN Cloud IIIMTN Cloud II

AccessionAgreement

AccessionAgreement

AccessionAgreement

HelpdeskHelpdesk

Contract

Contract

Expansion

Expansion

Benefits of IMTN

The implementation of the IMTN brings The implementation of the IMTN brings various benefitsvarious benefits::

(1) further reliability(1) further reliability stable operation for real-time data exchangestable operation for real-time data exchange

(2) better performance in throughput(2) better performance in throughput exchange of large volume of data such as satellite exchange of large volume of data such as satellite

data/productsdata/products

(3) manageable link parameters(3) manageable link parameters efficient configuration to meet traffic conditionsefficient configuration to meet traffic conditions

(4) flexibility and scalability(4) flexibility and scalability easy compliance with evolving requirementseasy compliance with evolving requirements

(5) cost-effectiveness(5) cost-effectiveness saving recurrent costssaving recurrent costs

Market trends of global managed data network services

• Migration from leased circuit, ATM and Frame Relay services to MPLS/IP-VPN (Multi Protocol Label Switching/IP-Virtual Private Network) is remarkable.

• Layer 2 switching VPN is one of next-generation WAN services but premature in market.

0

20

40

60

80

100

120

140

2003 2004 2005 2006 2007 2008 [year]

[billion US$] Leased circuit ATM/Cell Relay Frame Relay MPLS/IP-VPN Layer 2 VPN

Retail scale of global WAN services

Estimation

Market share of Tier-1 global network operatorsMarket leaders : Equant (OBS at present), AT&T and BT/BT

InfonetTheir strategies: • Extending service coverage by establishing new MPLS

PoPs (Points of Presence)• Bilateral partnerships with national and regional telecom

carriers for MPLS interoperability outside of their footprints

Fast-growth markets : Asia and Eastern Europe

MCI7%

BT/ BT Infonet11%

AT&T12%

Equant (present: OBS)

12%

Cable & Wireless2%

NTT Communications1%

T-Systems2%

Sprint1%

SI/ IT outsourcers37%

Other networkoperators

15%

Global WAN service share (2nd quarter of 2005)

MPLS/IP-VPN

Provider’s PEs and Core Routers based on MPLS have Label Tables and switch IP packets forward according to the Tables.

CE : Customer Edge Router VPN : Virtual Private Network PE : Provider Edge Router MPLS : Multi Protocol Label Switching

Closed

IP networkby a provider

CE PE

CE PE

CE

CE

IP IP Label IP Label

Core Router

Core RouterCore Router

PE

IP

VPN group

VPN group

MPLS/IP-VPN is one of most promising WAN services.

Future of IMTN

For further improvement, For further improvement, migration from Frame Relay to MPLS/IP-VPN is planned. MPLS/IP-VPN service provides:

• flexibility of mesh connectivity among GISCs• additional bandwidth.

Study of possibility ofStudy of possibility ofconsolidation of two Cloudsconsolidation of two Clouds

Frame RelayFrame RelayMPLS/IP-VPNMPLS/IP-VPN

Early2007

Frame RelayFrame RelayMPLS/IP-VPNMPLS/IP-VPN

End of2007

Cloud ICloud I

Cloud IICloud II

CoordinationCoordination

GTSGTS

IMTNIMTN

WIS core network

The IMTN would function as a WIS core network

linking a small number of GISCs together.