METHOD AND APPARATUS TO CORRECT INDOOR POSITIONING BY UTILIZING Wi-Fi HANDOVERS
First Claim
1. A computer-implemented method of mobile device dead reckoning (DR) navigation, the method comprising:
- during a handover of a mobile device from one Access Point (AP) to a next AP;
determining whether a DR current position of the mobile device is within a border of a handover spot associated with the next AP; and
if not, resetting the DR current position of the mobile device to a point on the handover spot'"'"'s outer diameter nearest to the DR current position of the mobile device such that sensor-based DR error or drift is accounted for during the interior AP handover.
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Accused Products
Abstract
A system and method may dynamically correct the dead reckoning (DR) position of a mobile device. An indoor or outdoor venue may have Access Points (APs) dispersed around its interior. Each time that a mobile device experiences a handover from one AP to a new AP, the mobile device and/or the local network associated with the venue may determine whether or not the mobile device'"'"'s DR position corresponds to the location of the new AP. If the mobile device'"'"'s DR position does not correspond to the location of the new AP within a predetermined threshold, then the mobile device'"'"'s DR position may be updated to a position associated with the new AP. As a result, the DR position of the mobile device may be continuously checked, and if need be, corrected at each AP handover associated with the venue. The APs may be Wi-Fi/WLAN APs, eNodeB'"'"'s, or other APs.
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Citations
20 Claims
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1. A computer-implemented method of mobile device dead reckoning (DR) navigation, the method comprising:
during a handover of a mobile device from one Access Point (AP) to a next AP; determining whether a DR current position of the mobile device is within a border of a handover spot associated with the next AP; and if not, resetting the DR current position of the mobile device to a point on the handover spot'"'"'s outer diameter nearest to the DR current position of the mobile device such that sensor-based DR error or drift is accounted for during the interior AP handover. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer-implemented method of navigation, the method comprising:
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during a handover of a mobile device from one Access Point (AP) to a new AP, determining whether a dead reckoning (DR) current position of the mobile device is within a predetermined distance of the new AP; and if not, resetting the DR current position of the mobile device to a point associated with the new AP such that DR error or drift is accounted for at the AP handover event. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A computer-implemented method of navigation, the method may comprise:
during a handover of a mobile device from one AP to a next AP, determining whether a dead reckoning (DR) current position of the mobile device is within a predetermined distance of the next AP'"'"'s location; and if not, resetting the DR current position of the mobile device to a (a) point associated with, or within a predetermined distance of, the next AP'"'"'s location, or (b) a radius of a circular handover spot associated with the next AP such that DR error or drift is accounted for at the AP handover event. - View Dependent Claims (17, 18, 19, 20)
Specification