SHORT RANGE RF MONITORNING SYSTEM
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Accused Products
Abstract
A wireless short range radio-frequency master device adapted to create and maintain a portable private network of wireless short range radio-frequency slave devices wherein the master device is configured to detect and register suitable slave devices for a network, and is capable of determining the proximity of any registered slave device with respect to the master device in use, the master device further being adapted to enable a user to define two or more groups of registered slave devices selected from the total number of registered slave devices and to enable a user to select a defined group of such registered slave devices as an active group, thereby forming an active portable private network of wireless short range radio frequency devices comprising the master device and selected registered slave devices within the selected group.
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Citations
32 Claims
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1-21. -21. (canceled)
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22. A method for determining a separation between at least two portable wireless short range radio-frequency devices comprising a master device and one or more slave devices, the method comprising:
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detecting one or more slave devices within a communication range of the master device; measuring a received and transmitted signal strength between the master and one or more slave devices using two or more different methods; and determining a measured proximity of the one or more slave devices with respect to the master device based on the measured signal strength, wherein the signal strength is determined by a combination of the two or more different methods. - View Dependent Claims (23, 24, 25, 26, 27, 28, 30, 32)
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29. A wireless short range radio-frequency master device for determining the proximity of one or more slave wireless short range radio-frequency devices, the master device being configured to:
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detect one or more slave devices within a communication range of the master device; measure the received and transmitted signal strength between the master and the one or more slave devices using two or more different methods; and calculate a measured proximity between the master device and the one or more slave devices based on a combination of measured signal strengths determined by the different methods.
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31. A system for determining the distance between at least two portable wireless short range radio-frequency devices comprising a master device and one or more slave devices, the master device being configured to
detect one or more slave devices within a communication range of the master device; -
measure a received and transmitted signal strength between the master and the one or more slave devices using a combination of two or more different methods; and calculate a measured proximity between the master device and the one or more slave devices based on a combination of measured signal strengths determined by the different methods.
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Specification