Patent ID: 8668643

Claim:
A method for locating a person within a building, the method comprising: providing a plurality of receivers at spaced locations in the building, each receiver having a specified location, a predetermined reception range and receiver identification data identifying the receiver, the reception range of each receiver overlapping with the reception range of at least one next closest receiver; wirelessly transmitting first data from a transmitter connected to the person without the transmitter receiving data from any of the receivers, the first data including person identification data identifying the person, wherein wirelessly transmitting the first data comprises wirelessly transmitting in short bursts at random intervals; receiving the first data at least one of the receivers when the transmitter is within the reception range of the at least one receiver; and transmitting second data from the at least one receiver to a central station, the second data including the person identification data and the receiver identification data for the at least one receiver, whereby the central station uses the personal identification data and the receiver identification data to locate the person.