Social alarm system with location detection in a dwelling
First Claim
1. A social alarm system with location detection in a dwelling, comprising:
- a personal radio trigger configured to be carried by a client in the dwelling and operable to transmit an alarm signal by wireless radio frequency transmission in response to a triggering alarm event;
a client unit operable to receive the alarm signal and initiate an alarm call to a remote monitoring center over a communications network;
a plurality of radio receptor nodes operable to monitor the wireless radio frequency transmissions from the personal radio trigger, each radio receptor node being configured to report at least one respective received signal strength value; and
a location finder unit operable to determine a location of the personal radio trigger in the dwelling according to the received signal strength values reported from the plurality of radio receptor nodes;
wherein the location finder unit is configured to perform a location finding algorithm comprising;
receiving a set of observed signal strength values from the plurality of radio receptor nodes, comparing the set of observed signal strength values against sets of previously recorded signal strength values from a plurality of known locations in the dwelling, and thereby determining a current location of the personal radio trigger in the dwelling from amongst the plurality of known locations.
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Accused Products
Abstract
A social alarm system provides location detection within a dwelling. A personal radio trigger unit is carried by a client and transmits an alarm signal in response to a triggering event, such as by a manual alarm button or an automatic fall detection circuit. A client unit is operable to receive the alarm signal and initiate an alarm call to a remote monitoring center over a communications network. A plurality of radio receptor nodes monitor the wireless RF transmissions from the personal radio trigger to report respective received signal strength values. A location finder unit determines a location of the personal radio trigger, by using absolute error calculations and/or shape error calculations against previously recorded known locations in the dwelling.
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Citations
20 Claims
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1. A social alarm system with location detection in a dwelling, comprising:
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a personal radio trigger configured to be carried by a client in the dwelling and operable to transmit an alarm signal by wireless radio frequency transmission in response to a triggering alarm event; a client unit operable to receive the alarm signal and initiate an alarm call to a remote monitoring center over a communications network; a plurality of radio receptor nodes operable to monitor the wireless radio frequency transmissions from the personal radio trigger, each radio receptor node being configured to report at least one respective received signal strength value; and a location finder unit operable to determine a location of the personal radio trigger in the dwelling according to the received signal strength values reported from the plurality of radio receptor nodes; wherein the location finder unit is configured to perform a location finding algorithm comprising;
receiving a set of observed signal strength values from the plurality of radio receptor nodes, comparing the set of observed signal strength values against sets of previously recorded signal strength values from a plurality of known locations in the dwelling, and thereby determining a current location of the personal radio trigger in the dwelling from amongst the plurality of known locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of location finding in a dwelling by a social alarm system, comprising:
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transmitting an alarm signal by wireless radio frequency transmission in response to a triggering alarm event from a personal radio trigger carried by a client in the dwelling; receiving the alarm signal at a client unit and initiating an alarm call to a remote monitoring center over a communications network; monitoring the wireless radio frequency transmissions from the personal radio trigger by a plurality of radio receptor nodes to report at least one respective received signal strength value; and determining a location of the personal radio trigger in the dwelling by performing a location finding algorithm comprising;
receiving a set of observed signal strength values from the plurality of radio receptor nodes, comparing the set of observed signal strength values against sets of previously recorded signal strength values from a plurality of known locations in the dwelling, and thereby determining a current location of the personal radio trigger in the dwelling from amongst the plurality of known locations. - View Dependent Claims (20)
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Specification