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Dead reckoning using proximity sensors

A technology of proximity sensor and dead reckoning, which is applied in the direction of instruments, navigation, distance measurement, etc., can solve the problems of difficult (or even occasional) position determination technology, interference, and impossibility

Active Publication Date: 2014-07-16
QUALCOMM INC
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  • Claims
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AI Technical Summary

Problems solved by technology

However, if the mobile device cannot receive signals from an appropriate number of satellites or cell towers, the location of the mobile device may not be determined using location determination techniques
For example, when a mobile device is located within a structure, such as a building, it may be difficult to constantly (or even sporadically) use a mobile device based on GPS Position Determination Technology
As such, the use of mobile devices to determine the location within a structure may not be possible where GPS or cellular signals are the only location determination technologies available

Method used

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Embodiment Construction

[0024] Dead reckoning may involve determining a current location using a previously determined location in combination with known or estimated speed, time of travel, and / or direction of movement. As such, using the previous location of the mobile device, a new location of the mobile device may be determined based on the determined movement and / or determined orientation of the mobile device. In some embodiments, dead reckoning may be used once position determination techniques such as GPS, cellular signal triangulation, or forward link timing are no longer available (e.g., due to entry into buildings interfering with reception of appropriate signals) . Dead reckoning may start from the last position determined using position determination techniques (called a "fixed position"). As such, when position determination techniques are not available, dead reckoning may be used to determine at least an approximate position.

[0025] Dead reckoning may involve data from an acceleromet...

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Abstract

Various arrangements for limiting inaccuracy of dead reckoning are presented. Proximity data may be collected using a plurality of proximity sensors of a mobile device. A position of the mobile device may be determined in relation to a user using the proximity data. Whether to determine a location of the mobile device using a dead reckoning technique may be determined at least partially based on the position of the mobile device in relation to the user.

Description

[0001] cross reference [0002] This application asserts U.S. Provisional Application No. 61 / 553,035, filed October 28, 2011, entitled "DEAD RECKONING USING PROXIMITY SENSORS," and filed May 18, 2012. RIGHTS AND PRIORITY TO US NON-PROVISIONAL APPLICATION 13 / 475,603, TITLE DEAD RECKONING USING PROXIMITY SENSORS. Each of these references is hereby incorporated by reference in its entirety for all purposes. Background technique [0003] Location determination techniques such as GPS, cellular signal triangulation, or forward link timing can be used to determine the location of the mobile device. This position determination technique may work better when signals are available from an appropriate number of satellites or cell towers (eg, three). However, if the mobile device is unable to receive signals from an appropriate number of satellites or cellular towers, the location of the mobile device may not be determined using location determination techniques. For example, when a m...

Claims

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Application Information

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IPC IPC(8): G06F1/16G06F21/16G01C22/00H03K17/96
CPCG01C22/006G06F1/1684G01C21/1652G01C22/00H04W64/00H04W24/00
Inventor 巴巴科·福鲁坦保尔利奥尼德·希亚恩布拉特
Owner QUALCOMM INC
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