Communication terminal out of range determination method, wireless communication system switching method and communication terminal
First Claim
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1. A wireless communication system switching method in a communication terminal capable of connecting to a plurality of different wireless communication systems comprising:
- determining whether or not the communication terminal is out of range based on a transmission level of the communication terminal and a received instruction; and
beginning preparation for switching to a different wireless communication system from the wireless communication system to which the communication terminal is connected according to a determination that the communication terminal is out of range.
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Abstract
There is provided a communication terminal out of range determination method, a wireless communication system switching method and a communication terminal, capable of determining accurately whether or not a communication terminal is out of range. Determining whether or not the communication terminal is out of range is based on a transmission level of a transmission signal from the communication terminal to a base station.
51 Citations
6 Claims
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1. A wireless communication system switching method in a communication terminal capable of connecting to a plurality of different wireless communication systems comprising:
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determining whether or not the communication terminal is out of range based on a transmission level of the communication terminal and a received instruction; and beginning preparation for switching to a different wireless communication system from the wireless communication system to which the communication terminal is connected according to a determination that the communication terminal is out of range. - View Dependent Claims (2, 3)
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4. A communication terminal comprising:
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a communication unit capable of connecting to a plurality of different wireless communication systems; a detection unit which detects a transmission level of the communication terminal; a determination unit which determines whether or not the communication terminal is out of range based on the transmission level and a received instruction; and a switching unit which begins preparation for switching to a different wireless communication system from the wireless communication system to which the communication terminal is connected according to a determination by the determination unit that the communication terminal is out of range. - View Dependent Claims (5, 6)
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Specification