current status of mobile satellite services in japan and

International Telecommunication Union

Workshop on Satellites in IP and MultimediaGeneva, 9-11 December 2002

Current Status of Mobile Current Status of Mobile Satellite Services in Japan Satellite Services in Japan

and Next Stageand Next Stage

KunihiroKunihiro HayashiHayashiSenior Manager, Emerging Business DepartmentSenior Manager, Emerging Business Department

NTT DoCoMo, inc.NTT DoCoMo, inc.

221.11.2002 Workshop on Satellites in IP and Multimedia - Geneva, 9-11 December 2002

1,323,000

2,206,000

4,936,000

10,960,000

17,984,00023,897,000

29,356,00036,026,000

40,783,000

-50,000,000

-40,000,000

-30,000,000

-20,000,000

-10,000,000

0

10,000,000

20,000,000

30,000,000

40,000,000

50,000,000

3/1994 3/1995 3/1996 3/1997 3/1998 3/1999 3/2000 3/2001 3/2002

NTT DoCoMo Mobile Communications Services

Subscribers

30,000

- 10,000

- 20,000

Satellite Mobile Communications Service started in March 1996

Satellite Mobile Communications Service started in March 1996

406,500

16,500

23,000 25,600 27,50028,000

Cellar phoneSatellite phone


Satellite Mobile Communications Service

Satellite Land Mobile Telephone Service? Single Mode?? Dual Mode?

Satellite Marine Telephone Service? Single Mode?

?WideStarCarPhone

[ Car Mounted]

?WideStarPortablePhone

[ Portable Type]

?WideStarMarinePhone

[ Ship Mounted]

?WideStar Portable MarinePhone

[ Portable Type]

In Flight Telephone

Service

?WideStar WingPhone( Introduced in 2001

)

Public Aviation Telephone Service( Analog Type)

Satellite Packet Communications Service( Uplink 4.8kbps/ Downlink 64kbps)

Satellite Packet Communications Service( Uplink 4.8kbps/ Downlink 64kbps)

Voice/Non-Voice Telecommunications ServicesVoice/Non-Voice Telecommunications Services


WideStar PortablePhone,CarPhone,MarinePhone

Subscribers

0

2

4

6

8

10

12

14

1997 1998 1999 2000 2001

( ×1000)

02468

1012141618

1997 1998 1999 2000 2001

MaritimeSubscriber usingPrevious System

Satellite MaritimeSubscriber

?1999.3.31: Previous System Removal

Number of subscribers for PortablePhone, CarPhone

Number of subscribers for maritime use


WideStar Service Configuration

Satellitebase station

Satellitebase station

DoCoModigital mobile

communicationsnetwork

DoCoModigital mobile

communicationsnetwork

Publicnetwork

Publicnetwork

WideStarDoPa N21

WideStarPortable

Phone

WideStarCarPhone

WideStarWingPhone

FAX TEL PC

DigitalMova

N-STAR a

N-STAR bN-STAR c

Feeder link:C-band (6/4GHz)

Service link:S-band (2.6/2.5GHz)

? High reliable satellite network using 2 satellites with 2 base-stations


A satellite mobile communications Service covering all of Japan Including offshore areas.

· This satellite system provides maritime telephone service up to 200 nautical miles offshore.

· Stable communications with digital service.

(Voice: 5.6kbps. Fax and data:4.8kbps.)· Satellite packet service is also offered.(64kbps, 4.8kbps)

WideStar Service Configuration


WideStar System Parameters

-----------5.6kbps PSI-CELPCodingVoice/FAX/Data Communication? LAN· Internet ConnectServices

Return Link : 4.8kbpsForward Link : 64kbps

4.8kbpsChannel Capacity

Return Link : 12.5kHzForward Link: 150kHz

12.5kHzChannel Separation

Packet SwitchCircuit Switch

Return Link : FDMA( SCPC)Forward Link: TDMFDMA( SCPC)Access Technique

p/4 Shift-QPSK, Coherent demodulationModulation

Mobile Terminal to Satellite: S Band( 2.6/2.5GHz)Satellite to Base Station : C Band( 6/4GHz)

Frequency Band

Items


Satellite Packet Communications Service

DoCoMo PDC-P NW

Internet

ProviderRouter

Router Router

ProviderRouter

Server

RouterRouter

Router

Intranet-B

Leased Circuit/ISDN

Intranet-A

HOST

HOSTHOST

Router

SatelliteBase Station

Base Station

????

DoPaTerminal

N-STAR

GW GW

Data terminal

64kbps

4.8kbps 64kbps

4.8kbps· E-Mail· Internet access· Maritime Navigation and control

· Weather Information

· E-Mail· Internet access· Maritime Navigation and control

· Weather Information

Ship

WideStarDoPa N21


Example for WideStar MarinePhone Service

Features:

· Satellite maritime telephone service with coverage up to 200 nautical miles offshore.

· Fax Information Service is offered.

- A service that provides you with useful infor-mation such as current weather conditions and forecast.


This service is suitable for business use in mountainous areas, for outdoor leisure and as backup communications inthe event of disaster.

· Business contact in mountainousareas communications system from construction facilities.

· Outdoor leisure activities.· Standard interface with telephone

call (Credit Card Phone, Private PHS terminals)

Voice and Fax Transmission System


Achieves reliable data trans-mission from remote moun-tainous regions and on the ships.

· Internet/LAN applications from maritime users

· Transmission of patient electrocardiograms from ambulances to hospitals

· Mountain road information system

· Positioning Management system (Ships, Vehicle)

Data Transmission System

N-STAR

Ship

WideStarDoPa N21

PC

DoPa NW

N-STAR

router router

LAN NW


This service can be used fora variety of purpose, including remote observation of inaccessible areas and transmission of photographs for news coverage.

· Observation of plant and animal ecosystems

· Transmission of press photographs

· Volcano observation data transmission system

Image Transmission System

N-STAR

Sensor

N-STAR

Camera

Control unit

Image transmission

unit

NCU-200S WideStar PortablePhone

Ex-antennaHandset

Base station

DoCoMo NW

Image transmission

unitVTR PC

Monitor


These systems enable to gather telemetric data from remotelocations. Measuring equipment and solar panels can be linked with satellite service to providesignificant surveillance and observation systems.

· Meteorological observation· Seismic activity observation· Water level observation

of rivers and dams· Diastrophic observation

Remote Measuring System

N-STAR

Sensor

Switch box

Data loggerNTT NW

NCU-200S

N-STAR

WideStar Portable Phone

Ex-antennaHandset

Base station

DoCoMo NW

modem

PC


Future Plans for the Satellite Mobile Communications Services

1.Maritime Satellite Communications Services- Maintain the satellite communications services for the

maritime customers who have no other methods to communicate.

- Improve the satellite communications services such as connecting Internet or data transmissions.

2. High reliable communications network using 2 Satellites- Keep the good satellite communications network

performance with high reliability even in the disaster.- Data transmission usage in the area where the terrestrial

mobile services don’t cover.


Future Plans for the Satellite Mobile Communications Services

3. Integrated services for the next stage after launch of higher performance satellites.

- High speed satellite communications services using S-Band and provide new services in the broadbandsatellite network connecting to IP Network.

- Small size satellite terminals for easily portable use.


Satellite Mobile Communications Service Image

WideStarWideStar CarPhoneCarPhone

WideStarWideStarWingPhoneWingPhone((Introduced In Introduced In 20012001 ))

N-STAR

WideStarWideStar PortablePhonePortablePhone

C Band(6/4GHz)

S Band(2.6/2.5GHz

)

DoCoMoEarth Station

DoCoMoNW

DoCoMoNW

NTTNW

NTTNW

Mobile StationFAX PC PSTN

WideStarWideStarMarinePhoneMarinePhone

current status of mobile satellite services in japan and

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