Patent ID: 8665063
Filing Date: 2014-03-04
Classification: H04W

Abstract:
1. A method, comprising: distributing a number of wireless communication devices over a region, the wireless communication devices each having a different one of a number of device identifiers, the device identifiers each corresponding to a time-varying energy pattern relative to a sequence of time intervals; selecting one of the wireless communication devices to determine, a first subset of the wireless communication devices being within a wireless communication range of the one of the wireless communication devices and a second subset of the wireless communication devices being outside the wireless communication range of the one of the wireless communication devices; with the one of the wireless communication devices, prompting wireless transmission of the device identifiers from the wireless communication devices; providing a representation of a combination of the device identifiers received by the one of the wireless communication devices from each of the first subset of the wireless communication devices; for each of the time intervals, processing the representation of the combination of the device identifiers to determine if a received energy level satisfies a test criterion; and determining the wireless communication devices in the second subset in accordance with the processing of the representation of the combination of the device identifiers.