Patent ID: 9746541
Date: 2017-08-29
CPC Classifications: G01S

Claim:
1. A method comprising: receiving, by a user device, a first received signal strength indicator (RSSI) of a first beacon in an array of beacons and receiving a second RSSI of a second beacon in an array of beacons; calculating a RSSI of the array (r) as a function of the first RSSI and the second RSSI; retrieving a calibrated RSSI value of the array (r′) from a memory, wherein the calibrated RSSI value of the array is defined by where r′ is the RSSI calibration value, b i ′ is the average RSSI at calibration time and s i ′ is the variance of the RSSI at calibration time; determining whether r>r′; and outputting data to the user device responsive to determining that r>r′, the data to instigate a feature of the user device.