Mobile communication terminal
First Claim
Patent Images
1. A mobile communication apparatus comprising:
- a wide area receiver operating at relatively low power, for receiving a selective calling signal from a wide area base station that forms a wide one-way communication area;
a transceiver operating at higher power than the wide area receiver, for two-way communication with a nearest cell base station that forms a two-way communication area;
a determiner for determining whether the mobile communication apparatus exists within or outside the wide one-way communication area based on a received signal of the wide area receiver; and
a communication controller for causing the wide area receiver to operate at all times and causing the transceiver to start operating when the determiner determines that the mobile communication apparatus exists outside the wide one-way communication area.
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Accused Products
Abstract
A mobile communication apparatus includes a wide area receiver and a cell transceiver. The wide area receiver which is operable at relatively low power receives a selective calling signal from a wide area base station that forms a wide one-way communication area. The cell transceiver operable at higher power than the wide area receiver performs two-way communication with a nearest cell base station that forms a two-way communication area. The wide area receiver is caused to operate at all times. However, when the mobile communication apparatus exists outside the wide one-way communication area, the transceiver is caused to start operating.
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Citations
18 Claims
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1. A mobile communication apparatus comprising:
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a wide area receiver operating at relatively low power, for receiving a selective calling signal from a wide area base station that forms a wide one-way communication area; a transceiver operating at higher power than the wide area receiver, for two-way communication with a nearest cell base station that forms a two-way communication area; a determiner for determining whether the mobile communication apparatus exists within or outside the wide one-way communication area based on a received signal of the wide area receiver; and a communication controller for causing the wide area receiver to operate at all times and causing the transceiver to start operating when the determiner determines that the mobile communication apparatus exists outside the wide one-way communication area. - View Dependent Claims (2, 3, 4, 5)
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6. A mobile communication apparatus comprising:
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a first receiver operating at relatively low power, for intermittently receiving a selective calling signal from a wide area base station that forms a wide one-way communication area; a second receiver operating at higher power than the first receiver, for intermittent reception from a nearest cell base station that forms a two-way communication area; a transmitter for transmission to the nearest cell base station; a determiner for determining whether the mobile communication apparatus exists within or outside the wide one-way communication area based on a received signal of the first receiver; and a communication controller for controlling such that the first receiver is caused to operate at all times and such that, when the determiner determines that the mobile communication terminal exists outside the wide one-way communication area, the transmitter is caused to transmit a location registration signal to the cell base station and, after location registration has been made, the second receiver is caused to intermittently receive a radio signal from the cell base station while operating the first receiver. - View Dependent Claims (7, 8, 9)
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10. A communication control method for a mobile communication apparatus, comprising the steps of:
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driving a wide area receiver operating at relatively low power to receive a selective calling signal from a wide area base station that forms a wide one-way communication area at all times; determining whether the mobile communication apparatus exists within or outside the wide one-way communication area based on a received signal of the wide area receiver; and starting a cell transceiver operating at higher power than the wide area receiver for two-way communication with a nearest cell base station that forms a two-way communication area, when the mobile communication apparatus exists outside the wide one-way communication area. - View Dependent Claims (11, 12, 13, 14)
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15. A mobile communication system comprising:
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a plurality of mobile terminals; a one-way communication system where a wide area base station forms a wide one-way communication area; a two-way communication system having a cellular service area which is formed by a plurality of cell base stations each forming a cellular two-way communication area; and a system controller connected to the one-way communication system and the two-way communication system, for controlling mobile communications in the wide one-way communication area and/or the cellular service area, wherein each of the a mobile terminals comprises; a wide area receiver operating at relatively low power, for receiving a selective calling signal from the wide area base station; a transceiver operating at higher power than the wide area receiver, for two-way communication with a nearest cell base station; a determiner for determining whether the mobile terminal exists within or outside the wide one-way communication area based on a received signal of the wide area receiver; and a communication controller for causing the wide area receiver to operate at all times and causing the cell transceiver to start operating when the determiner determines that the mobile terminal exists outside the wide one-way communication area. - View Dependent Claims (16, 17, 18)
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Specification