WIRELESS-BASED POSITIONING ADJUSTMENTS USING A MOTION SENSOR

• US 20150031402A1
• Filed: 10/15/2014
• Published: 01/29/2015
• Est. Priority Date: 11/21/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sridhara, Vinay, Aggarwal, Alok, Naguib, Ayman Fawzy
• Granted Patent: US 9,291,704 B2
• Time in Patent Office: Days
• US Class Current: 455/456.6
• CPC Class Codes: G01S 13/76 wherein pulse-type signals are transmitted
• CPC Class Codes: G01S 19/49 whereby the further system is an inertial position system, e.g. loosely-coupled
• CPC Class Codes: G01S 5/021 Calibration, monitoring or correction G01S5/0252 takes precedence
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: G01S 7/40 Means for monitoring or calibrating
• CPC Class Codes: H04W 4/027 using movement velocity, acceleration information

Abstract

Apparatuses and methods for adjusting wireless-derived positions of a mobile station using a motion sensor are presented. One method includes estimating a position of a mobile station based upon wireless signal measurements and measuring a movement of the mobile station using a relative motion sensor. The method further includes detecting a displacement of the mobile station based upon the measured movement, determining that the displacement is below a threshold and then adjusting the estimated position of the mobile station using information from the relative motion sensor. An apparatus includes a wireless transceiver, a relative motion sensor, a processor coupled to the wireless transceiver and the relative motion sensor, and a memory coupled to the processor. The memory stores executable instructions and data for causing the processor to execute methods for adjusting wireless-derived positions using a motion sensor.

Claims

1. A method for adjusting a wireless-based position estimate of a mobile station using a relative motion sensor, comprising:

estimating a position of a mobile station based upon wireless signal measurements;

detecting a displacement of the mobile station using the relative motion sensor;

adjusting an estimated processing delay of a wireless access point using the detected displacement; and

refining the estimated position of the mobile station using the adjusted processing delay.

2. An apparatus for adjusting a wireless-based position estimate of a mobile station using a relative motion sensor, comprising:

a wireless transceiver;

a relative motion sensor;

a processor coupled to the wireless transceiver and the relative motion sensor; and

a memory coupled to the processor, wherein the memory stores executable instructions and data for causing the processor to

estimate a position of a mobile station based upon wireless signal measurements,

detect a displacement of the mobile station using a relative motion sensor,

adjust an estimated processing delay of a wireless access point using the detected displacement, and

refine the estimated position of the mobile station using the adjusted processing delay.

3. An apparatus for adjusting a wireless-based position estimate of a mobile station using a relative motion sensor, comprising:

means for estimating a position of a mobile station based upon wireless signal measurements;

means for detecting a displacement of the mobile station using the relative motion sensor;

means for adjusting an estimated processing delay of a wireless access point using the detected displacement; and

means for refining the estimated position of the mobile station using the adjusted processing delay.

4. A machine-readable medium comprising instructions, which, when executed by a machine, cause the machine to perform operations, the instructions comprising:

instructions to estimate a position of a mobile station based upon wireless signal measurements;

instructions to detect a displacement of the mobile station using a relative motion sensor;

instructions to adjust an estimated processing delay of a wireless access point using the detected displacement; and

instructions to refine the estimated position of the mobile station using the adjusted processing delay.