Wireless local area network with geo-location capability
First Claim
1. A system for locating a wireless station in communication with a wireless local area network comprising:
- a plurality of cells defining a wireless local area network (WLAN) and each having an access point base station and adapted for communicating with wireless mobile devices using wireless communications signals; and
a processor operatively connected to each of said access point base stations and operative to process communications signals transmitted from a mobile device and determining which signals are first-to-arrive signals based on a common timing signal and conducting differentiation of the first-to-arrive signals to locate the mobile device.
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Accused Products
Abstract
A system of the present invention is operative for locating a wireless mobile device in communication with a wireless local area network (WLAN) that includes a plurality of cells defining a wireless local area network each having an access point base station. The access point base stations communicate with wireless mobile devices using wireless communication signals as typically spread spectrum communication signals. A processor is operatively connected to each of the access point base stations and operative to process communication signals transmitted from a mobile device and determine which signals are first-to-arrive signals based on a common timing signal and conduct differentiation of the first-to-arrive signals to locate the mobile device.
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Citations
36 Claims
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1. A system for locating a wireless station in communication with a wireless local area network comprising:
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a plurality of cells defining a wireless local area network (WLAN) and each having an access point base station and adapted for communicating with wireless mobile devices using wireless communications signals; and a processor operatively connected to each of said access point base stations and operative to process communications signals transmitted from a mobile device and determining which signals are first-to-arrive signals based on a common timing signal and conducting differentiation of the first-to-arrive signals to locate the mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for locating a wireless station in communication with a wireless local area network comprising:
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a plurality of cells defining a wireless local area network (WLAN) and each having an access point base station and adapted for communicating with wireless mobile devices using wireless spread spectrum communications signals, each base station further comprising edge detection circuitry time for detecting the leading edge of a communications signal transmitted from a mobile device; and a processor operatively connected to each of said access point base stations and operative to process the detected leading edge of received communications signals and determining first-to-arrive signals based on a common timing signal and conducting differentiation of the first-to-arrive signals to locate the mobile station. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A system for locating a wireless station in communication with a wireless local area network comprising:
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a plurality of cells defining a wireless local area network (WLAN) and each having an access point base station and adapted for communicating with wireless mobile devices contained within a cell using wideband spread spectrum communications signals; and a correlator operative with each of said access point base stations and time referenced with a common timing signal for receiving a portion of a wideband spread spectrum communications signal received from a mobile device for determining first-to-arrive signals and conducting differentiation of the first-to-arrive signals to locate the mobile device. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A system for locating a wireless station in communication with a wireless local area network comprising:
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a plurality of cells defining a wireless local area network (WLAN) and each having an access point base station time; at least one wireless mobile station for communicating with said access point base stations and each comprising a wireless local area network (WLAN) transmitter for transmitting a wireless communication signal to base stations and a location transmitter for appending a spread spectrum location pulse onto one of a rising or falling edge of the wireless communication signal; and a processor operatively connected to each of said access point base stations and operative to receive and process the appended location pulse from a mobile station and determining which signals are first-to-arrive signals based on a common timing signal and conducting differentiation of the first-to-arrive signals to locate the mobile station. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification