MOBILE COMMUNICATION DEVICE AND MOBILE COMMUNICATION SYSTEM

摘要

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.