MOBILE COMMUNICATION DEVICE AND MOBILE COMMUNICATION SYSTEM

WIPO Patent Application WO/2000/035234

A1

A mobile communication device for receiving service by a ground communication system in the service area thereof and by a satellite communication system outside the service area. The mobile communication device comprises a section for monitoring the service receiving state of the satellite communication system, a section for storing information on the service area of the ground communication system, a section for judging whether or not the current position is in the service area of the ground communication system based on the service area information stored in the memory section when deterioration of service receiving state of the satellite communication system is detected by the state monitoring section, and a switching control section for sustaining the service receiving state of the satellite communication system when it is judged that the current position is outside the service area and switching the service receiving state of the satellite communication system to the service receiving state of the ground communication system when the current position is in the service area.

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MURATA MAKOTO (JP)

PCT/JP1998/005507

June 15, 2000

December 07, 1998

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MITSUBISHI ELECTRIC CORP (JP)
MURATA MAKOTO (JP)

H04B7/185; H04W88/06; H04W36/14; (IPC1-7): H04Q7/38; H04B7/15

JPH0435327A	1992-02-06
JPH07226973A	1995-08-22
JPH03158028A	1991-07-08
JPH09121376A	1997-05-06

See also references of EP 1059826A4

Miyata, Kaneo (Marunouchi 2-chome Chiyoda-ku Tokyo, JP)

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