ROOM SEPARATION IN A WLAN BASED RTLS AND METHOD THEREFOR
First Claim
1. A wireless location system for tracking and locating a wireless tag in a structure having defined areas that provides for differentiation between the defined areas comprising:
- at least one ultrasonic transmitter positioned in each of the defined areas for transmitting an ultrasonic signal having data comprising at least one of area identification information or transmitter ID;
a plurality of wireless tags, wherein each wireless tag transmits data comprising at least one of a last area identifying information or transmitter ID received and accepted by the wireless tag in a tag message;
a plurality of location receivers installed in the structure for receiving the tag message and for reporting the received tag message and measured parameters; and
a server for receiving the tag message and measured parameters and for determining a location and defined area of each wireless tag.
1 Assignment
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Accused Products
Abstract
A wireless location system for tracking and locating a wireless tag in a structure having defined areas that provides for differentiation between the defined areas has at least one ultrasonic transmitter positioned in each of the defined areas for transmitting an ultrasonic signal having area identification and/or transmitter ID information. A plurality of wireless tags are provided wherein each wireless tag transmits a last area identifying and/or transmitter ID information received and accepted by the wireless tag in a tag message. A plurality of location receivers is installed in the structure for receiving the tag message and for reporting the received message from the tag along with optional measured parameters to a common server. The common server determines the location of each wireless tags in the structure using the defined area or transmitter ID as reported by each wireless tag.
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Citations
26 Claims
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1. A wireless location system for tracking and locating a wireless tag in a structure having defined areas that provides for differentiation between the defined areas comprising:
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at least one ultrasonic transmitter positioned in each of the defined areas for transmitting an ultrasonic signal having data comprising at least one of area identification information or transmitter ID; a plurality of wireless tags, wherein each wireless tag transmits data comprising at least one of a last area identifying information or transmitter ID received and accepted by the wireless tag in a tag message; a plurality of location receivers installed in the structure for receiving the tag message and for reporting the received tag message and measured parameters; and a server for receiving the tag message and measured parameters and for determining a location and defined area of each wireless tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 22, 24, 26)
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12. A method for tracking and locating wireless tags in defined areas of a structure and that provides for differentiation between the defined areas comprising:
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providing location receivers installed in the structure to locate wireless tags; installing at least one ultrasonic transmitter in each individual defined area; transmitting an ultrasonic signal by each of the at least one ultrasonic transmitter in each individual defined area, each ultrasonic signal confined to the individual defined area where transmitted, the ultrasonic signal having at least one of area identifying information or transmitter ID; receiving the ultrasonic signal having at least one of the area identifying information or transmitter ID by a wireless tag in coverage range of the at least one ultrasonic transmitter in the individual defined area; and transmitting a tag message by the wireless tag in coverage range, the tag message including at least one of a last identifying information or transmitter ID received and accepted by the wireless tag and a wireless tag identification data. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A wireless tag comprising:
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an ultrasonic receiver module for receiving an ultrasonic signal having at least one of area identification or transmitter ID information; a transmitter for transmitting the at least one of area identification or transmitter ID information received and accepted by the wireless tag and an identification number of the wireless tag; a memory for storing at least the identification number; a microprocessor coupled to the memory, the ultrasonic receiver module, and the transmitter; and a power supply for supplying power to circuitry of the wireless tag. - View Dependent Claims (19, 20, 21, 23, 25)
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Specification