Short range RF monitoring system
First Claim
1. A wireless short range radio frequency master device configured to:
- receive at a plurality of orientations of the master device a plurality of radio signals from at least one slave device, wherein the plurality of radio signals are transmitted using variable strengths;
assess a strength of radio signals of the plurality of radio signals received in the plurality of orientations of the master device;
determine from differences in the strength of the radio signals received at the plurality of orientations of the master device, a direction of the at least one slave device relative to the master device; and
wherein the direction of the at least one slave device relative to the master device is other than the direction associated with any of the plurality of orientations of the master device used to assess the strength of the radio signals.
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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.
37 Citations
9 Claims
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1. A wireless short range radio frequency master device configured to:
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receive at a plurality of orientations of the master device a plurality of radio signals from at least one slave device, wherein the plurality of radio signals are transmitted using variable strengths; assess a strength of radio signals of the plurality of radio signals received in the plurality of orientations of the master device; determine from differences in the strength of the radio signals received at the plurality of orientations of the master device, a direction of the at least one slave device relative to the master device; and wherein the direction of the at least one slave device relative to the master device is other than the direction associated with any of the plurality of orientations of the master device used to assess the strength of the radio signals.
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2. A method for determining a direction of at least one wireless short range radio-frequency slave device relative to a master device, the method comprising:
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receiving a plurality of radio signals from at least one slave device, wherein the plurality of radio signals are transmitted using variable strengths; assessing a strength of radio signals received by the master device positioned at an initial orientation; rotating the master device to one or more secondary orientations with respect to the initial orientation and assessing the strength of radio signals received by the master device positioned at each of the one or more secondary orientations; and determining from differences in the strength of the radio signals at the initial orientation and at the one or more secondary orientations a direction of the at least one slave device relative to the master device; and wherein the direction of the at least one slave device relative to the master device is other than a direction associated with any of the initial and secondary orientations used to assess the strength of the radio signals. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A system for creation and maintaining a portable private network of wireless short range radio-frequency devices comprising a master device and at least two slave devices that are enabled to form a portable private network when activated by the master device, wherein the master device is configured to:
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receive at a plurality of orientations of the master device a plurality of radio signals from the at least two slave devices, wherein the plurality of radio signals are transmitted using variable strengths; assess a strength of radio signals received by the master device; determine from differences in the strength of the radio signals received at the plurality of orientations of the master device a direction of each of the at least two slave devices relative to the master device; and wherein the direction of each of the at least two slave devices relative to the master device is other than a direction associated with any of the plurality of orientations of the master device used to assess the strength of the radio signals.
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Specification