System and method for determining the location of a station in a wireless environment
First Claim
1. A computer-implemented method of quantifying the shadow fading observed in a wireless environment having a plurality of wireless access points comprising:
- receiving location information relating to respective locations of the plurality of wireless access points in the wireless environment;
selecting a plurality of transceiver pairings from the plurality of wireless access points;
determining, based on the location information, a distance between individual wireless access points associated with the transceiver pairings to obtain a plurality of distances;
causing at least one wireless signal to be transmitted between each of the plurality of transceiver pairings;
determining a plurality of shadow fading factors based on the plurality of distances and received signal strength (RSS) information respectively associated with the at least one wireless signal transmitted between each of the plurality of transceiver pairings; and
determining an average shadow fading factor based on the plurality of shadow fading factors.
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Abstract
A system for quantifying the shadow fading observed in a wireless environment having multiple wireless access points is also provided. A distance determination module is in signal communication with the wireless access points. The distance determination module determines a distance between a pair of the wireless access points based on location information that relates to the locations of the wireless access points at the wireless environment. A shadow fading determination module is also in signal communication with the wireless access points. The shadow fading determination module determines a shadow fading factor based on the distance between a pair of the wireless access points and based on RSS information received from one of the wireless access points in the pair of wireless access points.
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Citations
28 Claims
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1. A computer-implemented method of quantifying the shadow fading observed in a wireless environment having a plurality of wireless access points comprising:
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receiving location information relating to respective locations of the plurality of wireless access points in the wireless environment; selecting a plurality of transceiver pairings from the plurality of wireless access points; determining, based on the location information, a distance between individual wireless access points associated with the transceiver pairings to obtain a plurality of distances; causing at least one wireless signal to be transmitted between each of the plurality of transceiver pairings; determining a plurality of shadow fading factors based on the plurality of distances and received signal strength (RSS) information respectively associated with the at least one wireless signal transmitted between each of the plurality of transceiver pairings; and determining an average shadow fading factor based on the plurality of shadow fading factors. - View Dependent Claims (2, 3, 4)
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5. A system for quantifying the shadow fading observed in a wireless environment having a plurality of wireless access points comprising:
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a distance determination module in signal communication with the plurality of wireless access points, the distance determination module selects a plurality of transceiver pairings from the plurality of wireless access points, and determines, based on location information that relates to respective locations of the plurality of wireless access points in the wireless environment, a distance between individual wireless access points associated with the transceiver pairings to obtain a plurality of distances; and a shadow fading determination module in signal communication with the plurality of wireless access points, the shadow fading determination module causes at least one wireless signal to be transmitted between each of the plurality of transceiver pairings, determines a plurality of shadow fading factors based on the plurality of distances and based on received signal strength (RSS) information respectively associated with the at least one wireless signal transmitted between each of plurality of transceiver pairings, and determines an average shadow fading factor based on the plurality of shadow fading factors. - View Dependent Claims (6, 7, 8)
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9. A computer-implemented method of localizing a station in a wireless environment having a plurality of wireless access points comprising:
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receiving location information relating to respective locations of the plurality of wireless access points in the wireless environment; selecting a plurality of transceiver pairings from the plurality of wireless access points; determining, based on the location information, a distance between individual wireless access points associated with the transceiver pairings to obtain a first plurality of distances; causing at least one wireless signal to be transmitted between each of the plurality of transceiver pairings; determining a plurality of shadow fading factors based on the first plurality of distances and received signal strength (RSS) information respectively associated with the at least one wireless signal transmitted between each of the plurality of transceiver pairings; and determining an average shadow fading factor based on the plurality of shadow fading factors; determining a second plurality of distances between the station and individual wireless access points in the plurality of wireless access points based on the average shadow fading factor for the wireless environment and based on RSS information received from the individual wireless access points; identifying a sub-region in the wireless environment that the station is located in based on the second plurality of distances; and identifying a location associated with the sub-region that corresponds to an approximate location of the station in the wireless environment. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for localizing a station in a wireless environment having a plurality of wireless access points comprising:
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a first distance determination module in signal communication with the plurality of wireless access points, the distance determination module selects a plurality of transceiver pairings from the plurality of wireless access points, and determines, based on location information that relates to respective locations of the plurality of wireless access points in the wireless environment, a distance between individual wireless access points associated with the transceiver pairings to obtain a first plurality of distances; and a shadow fading determination module in signal communication with the plurality of wireless access points, the shadow fading determination module causes at least one wireless signal to be transmitted between each of the plurality of transceiver pairings, determines a plurality of shadow fading factors based on the first plurality of distances and based on received signal strength (RSS) information respectively associated with the at least one wireless signal transmitted between each of plurality of transceiver pairings, and determines an average shadow fading factor based on the plurality of shadow fading factors; a second distance determination module that determines a second plurality of distances between the station and individual wireless access points in the plurality of wireless access points based on the shadow fading factor for the wireless environment and based on RSS information received from individual wireless access points in the plurality of access points; and a localization module that identifies a sub-region in the wireless environment that the station is located in based on the second plurality of distances and identifies a location associated with the sub-region that corresponds to an approximate location of the station in the wireless environment. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification