Patent ID: 7577444

Claim:
A method of indicating the location of a relatively mobile object, comprising the acts of: (a) generating a first signal that is characteristic of a first, relatively immobile object; (b) transmitting the first signal from the first relatively immobile object; (c) detecting the first signal at a receiver; (d) generating a second signal that is characteristic of a second, relatively immobile object; (e) transmitting the second signal from the second, relatively immobile object; (f) detecting the second signal at the receiver; (g) generating a third signal that is characteristic of the relatively mobile object; (h) detecting the third signal at the receiver; (i) operating a processing device operatively connected to the receiver using signal time-of-flight (t-o-f) data and/or received signal strength information (RSSI) of the first, second and third signals received by the receiver to establish a distance of the relatively mobile object respectively from the first and second relatively immobile objects; and (j) generating a signal indicating whether the relatively mobile object is closer to the first or the second relatively immobile object.