Positioning system and positioning method
First Claim
1. A positioning system for estimating the position of a receiver that has a GPS positioning function, a base station positioning function, and a wireless communication function, the system comprising:
- GPS reception means for receiving signals from a GPS satellite;
position estimation means for estimating the position of a receiver from a received GPS signal;
reception state information acquisition means for acquiring reception state information indicating the reception state of a radio wave produced by the wireless communication function of the receiver;
position estimation means for estimating the position of the receiver on the basis of the reception state information acquired by the reception state information acquisition means;
end decision means for deciding whether or not to end the position estimation by the position estimation means on the basis of a specific end condition, and, if it is decided not to end, causing the position estimation means to estimate the position of the receiver on the basis of new reception state information acquired by the reception state information acquisition means at a different timing from that of the reception state information used by the position estimation means to estimate the position;
indoor/outdoor determination means for determining whether the receiver is indoors or outdoors on the basis of the reception state information acquired by the reception state information acquisition means; and
end condition determination means for determining the specific end condition on the basis of a result of determination by the indoor/outdoor determination means.
1 Assignment
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Accused Products
Abstract
It is an object of the present invention to perform positioning at favorable positioning precision and in a favorable positioning time, according to whether a receiver is indoors or outdoors. A positioning server 10 comprises a reception state information acquisition component 12 that acquires reception state information indicating the reception state of a radio wave at a cellular terminal 20, a base station positioning calculator 13 that estimates the position of the cellular terminal 20 on the basis of the reception state information, an end decision component 14 that decides whether or not to end the position estimation on the basis of a specific end condition, and, if it is decided not to end, estimates the position of the cellular terminal 20 on the basis of new reception state information, an indoor/outdoor determination component 15 that determines whether the cellular terminal 20 is indoors or outdoors on the basis of the reception state information, and an end condition determination component 16 that determines the specific end condition on the basis of a result of determination by the indoor/outdoor determination component 15.
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Citations
6 Claims
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1. A positioning system for estimating the position of a receiver that has a GPS positioning function, a base station positioning function, and a wireless communication function, the system comprising:
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GPS reception means for receiving signals from a GPS satellite; position estimation means for estimating the position of a receiver from a received GPS signal; reception state information acquisition means for acquiring reception state information indicating the reception state of a radio wave produced by the wireless communication function of the receiver; position estimation means for estimating the position of the receiver on the basis of the reception state information acquired by the reception state information acquisition means; end decision means for deciding whether or not to end the position estimation by the position estimation means on the basis of a specific end condition, and, if it is decided not to end, causing the position estimation means to estimate the position of the receiver on the basis of new reception state information acquired by the reception state information acquisition means at a different timing from that of the reception state information used by the position estimation means to estimate the position; indoor/outdoor determination means for determining whether the receiver is indoors or outdoors on the basis of the reception state information acquired by the reception state information acquisition means; and end condition determination means for determining the specific end condition on the basis of a result of determination by the indoor/outdoor determination means. - View Dependent Claims (2, 3, 4, 5)
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6. A positioning method for estimating the position of a receiver that has a GPS positioning function, a base station positioning function, and a wireless communication function, the method comprising:
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a GPS reception step of receiving signals from a GPS satellite; a position estimation step of estimating the position of a receiver from a received GPS signal; a reception state information acquisition step of acquiring reception state information indicating the reception state of a radio wave produced by the wireless communication function of the receiver; a position estimation step of estimating the position of the receiver on the basis of the reception state information acquired in the reception state information acquisition step; an end decision step of deciding whether or not to end the position estimation in the position estimation step on the basis of a specific end condition, and, if it is decided not to end, estimating the position of the receiver in the position estimation step on the basis of new reception state information acquired in the reception state information acquisition step at a different timing from that of the reception state information used in the position estimation step to estimate the position; an indoor/outdoor determination step of determining whether the receiver is indoors or outdoors on the basis of the reception state information acquired in the reception state information acquisition step; and an end condition determination step of determining the specific end condition on the basis of a result of determination in the indoor/outdoor determination step.
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Specification