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US 7,502,619 B1Granted
Location determination of low power wireless devices over a wide area
OwnerDaniel A. Katzinventor
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OwnerDaniel A. Katzinventor
Estimating the term…
The present invention discloses a method and system for location determination of low power wireless devices, over a wide area, utilizing a multitude of communication devices operating on a WAN (Wide Area Network) which can detect signals transmitted by said nearby low power wireless devices, and report this detection to a control station over the WAN. Said station can further locate the reporting communication device by present art methods such as “network based” or “handset based”, and consequently locate the nearby wireless device. Due to the short range nature of the wireless device transmissions, and dynamic mobility of these devices, it is crucial to establish a swift ad-hoc connection between a wireless device and a nearby communication device, still, in order to save battery power and avoid inefficient and interfering transmissions, communications between a wireless device and a communication device are not initiated unitl a sensor comprised in the wireless device detects and a communication device. In a preferred embodiment, the wireless device is Bluetooth and the communication device is a Bluetooth enabled mobile/cellular phone and the sensor detects radiation emitted by the mobile device on non Bluetooth bands.
A system for location determination of wireless devices, over a wide area, comprised of a plurality of wireless devices, a plurality of communication devices, a communication network and a control station coupled to said network, wherein each of said wireless devices comprised of a first short range transmitter and a sensor, but not a receiver, said sensor configured to detect a nearby communication device and consequently trigger said first transmitter to transmit a first signal, said communication device comprised of a second receiver and a third transceiver, said second receiver configured to detect said first signal and couple it to said third transceiver, said third transceiver configured to communicate said signal to said control station through said communication network, said control station configured to determine the location of said communication device, and consequently determine the location of said nearby wireless device, wherein said sensor is configured to detect the nearby communication device by detecting radiation emitted by one of said communication devices communicating with another of said communication devices.
A wireless device for a system for location determination of wireless devices, over a wide area, said system comprised of a plurality of wireless device, a plurality of communication devices, a communication network and a control station coupled to said network, wherein said wireless device comprised of a first short range transmitter and a sensor, but not a receiver, said sensor configured to detect a nearby communication device and consequently trigger said first transmitter to transmit a first signal, said communication device comprised of a second receiver and a third transceiver, said second receiver configured to detect said first signal and couple it to said third transceiver, said third transceiver configured to communicate said signal to said control station through said communications network, wherein said sensor is configured to detect the nearby communication device by detecting radiation emitted by one of said communication devices communicating with another of said communication devices.
A method for location determination of wireless devices, over a wide area, wherein each wireless device obtaining a short range transmitter and a sensor, but not a receiver, comprising the steps of:
Dependencies are inferred from the claim text.