Mobile communication terminal
First Claim
1. A mobile communication terminal device comprisinga control means which evaluates a communication quality of a received signal by comparing a reception level of a signal transmitted by a satellite and a base station with a fixed threshold value and which switches selectively between a satellite communication mode which performs signal transmission and reception with a satellite and an earth communication mode which performs signal transmission and reception with a base station controlling a cell in a given region, a communication mode input means which displays a menu screen as allowing selection of said communication modes by a user, said satellite communication mode and said earth communication mode being prioritized and used out of said communication modes, and said communication mode input means receiving input of a desired communication mode selected by a user, and a threshold value variation means which varies a switching sensitivity of a communication mode with respect to a communication quality of a received signal by varying a threshold value in order to evaluate a communication quality of a received signal in response to a desired communication mode input from said communication mode input means.
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Accused Products
Abstract
A threshold value acting as a standard for switching a satellite communication mode and a cellular communication mode is adapted to use preset fixed threshold value. Thus the problem has arisen that a communication mode is switched in response to a signal level and a threshold value and not with reference to the requirements of a terminal user.
A menu screen allowing a terminal user to select a communication mode prioritizing use of a satellite communication mode or an earth-based communication mode is displayed. A communication mode input means and a threshold value variation means are provided. The communication mode input means receives input of a desired communication mode selected by a terminal user. The threshold value variation means varies a switching sensitivity of a communication mode with reference to a communication quality of a received signal by varying a threshold value in order to evaluate a communication quality of a received signal in response to a desired communication mode input from the communication mode input means.
30 Citations
5 Claims
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1. A mobile communication terminal device comprising
a control means which evaluates a communication quality of a received signal by comparing a reception level of a signal transmitted by a satellite and a base station with a fixed threshold value and which switches selectively between a satellite communication mode which performs signal transmission and reception with a satellite and an earth communication mode which performs signal transmission and reception with a base station controlling a cell in a given region, a communication mode input means which displays a menu screen as allowing selection of said communication modes by a user, said satellite communication mode and said earth communication mode being prioritized and used out of said communication modes, and said communication mode input means receiving input of a desired communication mode selected by a user, and a threshold value variation means which varies a switching sensitivity of a communication mode with respect to a communication quality of a received signal by varying a threshold value in order to evaluate a communication quality of a received signal in response to a desired communication mode input from said communication mode input means.
Specification