Systems and methods to determine a location of a mobile device
AssigneeWestfield Labs Corporation
InventorsGerard Joseph Cerchio, Brian David Wilson
Life of this patent
Estimating the term…
Abstract
Systems and methods to position beacons at traffic choke points, use a mobile device to detect the peaks of beacon signals corresponding to the mobile device traveling through the traffic “choke points”, and thus determine accurately the position and speed of the mobile device in the transport corridor between the choke points. The determined position and speed of the mobile device can be used to improve the performance of other location determination technologies, such as radio frequency fingerprint-based location estimate and/or inertial guidance location estimate.
Claims20
A method, comprising:
- providing a first beacon device at a first location of a transport corridor in a multi-floor environment;
- providing a second beacon device at a second location of the transport corridor;
- determining a mobile device being at the first location at a first time instance based on a peak of beacon signal power from the first beacon device;
- determining the mobile device being the second location at a second time instance based on a peak of beacon signal power from the second beacon device;
- correlating movement of the mobile device from the first location to the second location with a predetermined traffic speed along the corridor;
- and
- determining a position and a speed of the mobile device at a time instance based on the movement of the mobile device from the first location to the second location along the corridor.
A non-transitory computer storage medium storing instructions configured to instruct a computing apparatus to perform a method, the method comprising:
- measuring, by a mobile device, a radio frequency fingerprint;
- correlating the radio frequency fingerprint to a predetermined distribution of radio frequency fingerprints in a multi-floor environment;
- determining a first location determination result based on the correlating;
- measuring, by the mobile device, accelerations of the mobile device as a function of time;
- determining a second location determination result based on the accelerations;
- receiving, in the mobile device, a first beacon signal from a beacon device disposed at a first location of a transport corridor in the multi-floor environment;
- determining a first location of the beacon device based on the first beacon signal;
- and
- computing a location of the mobile device based on the first location of the beacon device, the first location determination result, and the second location determination result.
A mobile device, comprising:
- a motion sensor;
- at least one transceiver;
- at least one microprocessor;
- and
- a memory storing instructions configured to instruct the at least one microprocessor and the at least one transceiver to:
- measure, using the at least one transceiver, a radio frequency fingerprint;
- determine a first location determination result based on correlating the radio frequency fingerprint to a predetermined distribution of radio frequency fingerprints in a multi-floor environment;
- measure, using the motion sensor, accelerations of the mobile device as a function of time;
- determine a second location determination result based on the accelerations;
- and
- compute a location of the mobile device by combining the first location determination result and the second location determination result.
Dependencies are inferred from the claim text.