Patent ID: 8565712
Filing Date: 2013-10-22
Classification: H04W,Y02D

Abstract:
1. A method of tracking an item of inventory comprised of a radio frequency device, the method comprising: positioning an interrogation apparatus in a first region, the interrogation apparatus comprising a transceiver communicatively coupled to an antenna, the interrogation apparatus being configured to transmit radio frequency (RF) signals; interrogating the item of inventory by transmitting via the transceiver an RF signal; causing a transitioning to a first mode by the radio frequency device when the radio frequency device determines that the RF signal is at a first frequency and a first data rate; causing a transitioning to a second mode by the radio frequency device when the radio frequency device determines that the RF signal is at a second frequency and a second data rate; and tracking the item of inventory using at least the acts of interrogating and transitioning; wherein the radio frequency device is configured to remain in the first mode until transitioning into the second mode upon receipt of the RF signal at the second frequency and the second data rate; and wherein the radio frequency device is configured to remain in the second mode until transitioning into the first mode upon receipt of the RF signal at the first frequency and the first data rate.