TERMINAL POSITIONING METHOD, TERMINAL POSITIONING SYSTEM, POSITIONING SERVER, AND PROGRAM
First Claim
1. A terminal positioning method of specifying position of a terminal by using at least one of a plurality of positioning systems,wherein a use state of one or more first positioning systems in the plurality of positioning systems is monitored by a failure detector, thereby detecting a failure of at least one second positioning system other than the one or plurality of first positioning systems.
1 Assignment
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Accused Products
Abstract
[Subject] The present invention is directed to realize failure detection without directly detecting a failed positioning system.
[Solving Means] A terminal positioning system includes positioning systems 101 and 102 and a failure detector 104. When a failure occurs in one of the positioning systems 101 and 102, by monitoring a use state of the other positioning system, the failure in one of the positioning systems is detected. Priorities of positioning process on the positioning systems 101 and 102 may be determined so that the priority of positioning process on one of the positioning systems is higher than that on the other positioning system. The one of the positioning systems can perform positioning at higher precision than the other positioning system.
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Citations
25 Claims
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1. A terminal positioning method of specifying position of a terminal by using at least one of a plurality of positioning systems,
wherein a use state of one or more first positioning systems in the plurality of positioning systems is monitored by a failure detector, thereby detecting a failure of at least one second positioning system other than the one or plurality of first positioning systems.
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16. A terminal positioning system including a plurality of positioning systems and specifying position of a terminal by using at least one of the plurality of positioning systems,
wherein a use state of one or a plurality of first positioning systems in the plurality of positioning systems is monitored by a failure detector, thereby detecting a failure in at least one second positioning system other than the one or plurality of first positioning systems.
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24. A positioning server connected to, via a communication line, a base station that transmits first information for specifying position of a terminal and second information for specifying position of the terminal received from the terminal, the position server specifying the position of the terminal by using at least one of the first and second information, and comprising:
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a position specifying unit for specifying position of the terminal with reference to data indicative of association between the first or second information stored in a storage unit and the position of the terminal by using the first or second information; and a failure detector for detecting a failure in a transmitter for transmitting the second information to the terminal by monitoring the specification of the position of the terminal using the first information.
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25. A program used by a computer for a positioning server connected to, via a communication line, a base station that transmits first information for specifying position of a terminal and second information for specifying position of the terminal received from the terminal, the position server specifying the position of the terminal by using at least one of the first and second information, wherein the program for making the computer execute:
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a position specifying function of specifying position of the terminal with reference to data indicative of association between the first or second information stored in a storage unit and the position of the terminal by using the first or second information; and a failure detecting function of detecting a failure in a transmitter for transmitting the second information to the terminal by monitoring the specification of the position of the terminal using the first information.
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Specification