METHOD FOR DETERMINING LOCATION USING ACCESS POINT, AND APPARATUS THEREOF
First Claim
1. A method for measuring a location of a first access point (AP) installed at an unknown position by using at least one terminal that accesses the first AP and a second AP installed at a known position, the method comprising:
- receiving at least one first received signal strength intensity value for the first AP;
estimating location information of the terminal by receiving at least one second received signal strength intensity value for the second AP; and
determining a location of the first AP by using matching information when the number of matching information having the at least one first received signal strength intensity value and the location information of the terminal is greater than a predetermined reference number.
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Accused Products
Abstract
The present invention relates to a location measuring method using an access point, and an apparatus using the same. According to the present invention, a location of a terminal is estimated by using a signal strength received from an access point installed at a known position in a wireless network, and location of the access point installed at an unknown position is estimated by using a signal strength received from the access point installed in the unknown position and estimated location information of the terminal. In addition, a location of the terminal is finally calculated by using estimated location information of the access point installed at the known position. As described, the location of the terminal is determined by using estimated location information of an AP that is randomly installed by a user (that is, installed at an unknown position), and therefore a location of an AP installed in an area where it is difficult to measure and availability of location measurement can be improved. In addition, a signal strength measurement value, estimation location information of an AP installed at a known position, and estimation location information of an AP installed at an unknown position are used for location information calculation of a terminal, and accordingly, accuracy of the location measure can be improved.
30 Citations
18 Claims
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1. A method for measuring a location of a first access point (AP) installed at an unknown position by using at least one terminal that accesses the first AP and a second AP installed at a known position, the method comprising:
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receiving at least one first received signal strength intensity value for the first AP; estimating location information of the terminal by receiving at least one second received signal strength intensity value for the second AP; and determining a location of the first AP by using matching information when the number of matching information having the at least one first received signal strength intensity value and the location information of the terminal is greater than a predetermined reference number. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A location measuring method comprising:
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receiving a first received signal strength intensity value from a terminal that has requested location measurement, the first received signal strength intensity value being for a first access point (AP) installed at an unknown position; checking location information of the first AP, the location information being determined by using location information of the terminal that is estimated by using a second receive signal strength intensity value for a second AP and location information of the second AP; and calculating weights for the location information of the first AP, the signal strength value being received from the terminal that has requested the location measurement, and an estimated location error of the first AP, and determining a location of the terminal that has requested the location measurement through a weighted least squares method using the weights. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus measuring a location of a terminal by using a received signal strength intensity value received from an access point (AP) in a wireless network, the apparatus comprising:
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an AP location estimator estimating a location of a first AP by using matching information when the number of matching information is greater than a predetermined reference number, the matching information including location information of the terminal that is estimated by using at least one first received signal strength intensity value of a first access point (AP) installed at an unknown position and at least one second received signal strength intensity value received from a second AP installed at a known position, the first and second received signal strength intensity values being received from the terminal; and a terminal location calculator calculating weights of the first received signal strength intensity value of the first AP, location information of the first AP, and an estimated location error of the first AP, and determining a location of the terminal that has requested location measurement by using a weighted least squares method when receiving the first received signal strength intensity value from the terminal, the location information of the first AP being estimated by the AP location estimator. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification