Patent ID: 8687560
Filing Date: 2014-04-01
Classification: G01S,H04L,H04W

Abstract:
1. A positioning system, comprising N network access devices, wherein N is greater than 2, wherein each network access device in a first subset of N1 of the N network access devices, wherein N1 is at least 2, transmits a wireless location beacon signal, producing N1 wireless location beacon signals that are transmitted by the first subset, each network access device in a second subset of N2 of the N network access devices, wherein N2 is at least 2, receives the N1 wireless location beacon signals from the first subset and calculates N1 time of arrivals (TOAs) from each of the N1 received wireless location beacon signals, producing N1×N2 calculated TOAs by the second subset, using one or more wireless transmissions, one or more network access devices of the N network access devices transmit location coordinates of the N network access devices and transmit the N1×N2 calculated TOAs, differences calculated among the N1×N2 calculated TOAs, or a combination of one or more of the N1×N2 calculated TOAs and one or more of the differences calculated among the N1×N2 calculated TOAs, and at least one mobile device that