Patent ID: 8121110

Claim:
A method for locationing an object in a communication network, the method comprising: transmitting by a wireless transceiver fixed to the object of unknown location, a radio frequency (RF) packet, to a plurality of locationing transceivers at known locations in the communication network; determining by each of the plurality of locationing transceivers, the local time of arrival of the RF packet; placing, by each of the plurality of locationing transceivers, a time stamp on the received RF packet based on the local time of arrival and a local clock of each of the plurality of locationing transceivers along with a packet identifier number,; communicating by each of the plurality of locationing transceivers to an infrastructure device a list of time stamped and identified RF packets received by the identified locationing transceivers; correlating the time stamps for each identified RF packet across all locationing transceivers; and determining a spatial location of the object using a differential time-of-arrival triangulation.