Patent ID: 8224351
Filing Date: 2012-07-17
Classification: G01S,H04W

Abstract:
1. A computer-implemented method for identifying proximity of a mobile computing device to another mobile computing device, the method comprising: determining, by a computing system, that a set of mobile computing devices are geographically proximate to a first mobile computing device based at least in part on identifying that each of the mobile computing devices in the set received a first type of signal from an emitting device for which the first mobile computing device also received the first type of signal, wherein: determining, by the computing system, a subset of the mobile computing devices in the set that share a physical space with the first mobile computing device based at least in part on identifying that each of the mobile computing devices in the subset emitted a second type of signal that was detected by the first mobile computing device, or detected the second type of signal that was emitted by the first mobile computing device.