Patent ID: 8050668
Filing Date: 2011-11-01
Classification: G01S,G06Q,H04W,Y02D

Abstract:
1. A wireless two-way radio frequency (RF) data communication device comprising a data packet radio component that selectively reveals its presence in response to RF transmissions, the wireless two-way RF data communication device being configured to operate in a first state in which the wireless two-way RF data communication device: (i) receives RF transmissions; (ii) maintains at least one common designation for purposes of filtering RF transmissions received by the wireless two-way RF data communication device; (iii) identifies specific data in a received RF transmission; and (iv) in response to the received RF transmission in which the specific data is identified, whereby the wireless two-way RF data communication device can retransmit inquiries as to the presence of one or more wireless two-way RF data communication devices to other wireless two-way RF data communication devices.