Method and apparatus for detecting location changes and monitoring assistance data via scanning
First Claim
1. A method comprising:
- obtaining, at a mobile device, a rough estimate of a location of said mobile device;
identifying a plurality of transmitters within a signal acquisition range of said roughly estimated location;
transmitting probe requests addressed to at least some of said transmitters;
selectively initiating a passive scan at a receiver of said mobile device if a number of responses to said probe requests received from said transmitters is less than a threshold number;
obtaining a position fix of said mobile device based, at least in part, on said passive scan; and
restarting a location tracking filter of said mobile device based, at least in part, on said obtained position fix of said mobile device.
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Accused Products
Abstract
Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate or support one or more operations or techniques for detecting location changes and monitoring assistance data via scanning for use in or with a mobile device. Briefly, in accordance with at least one implementation, a method may include obtaining, at a mobile device, a rough estimate of a location of the mobile device; identifying a plurality of transmitters within a signal acquisition range of the roughly estimated location; transmitting probe requests addressed to at least some of the transmitters; and selectively initiating a passive scan at a receiver of the mobile device if a number of responses to the probe requests received from the transmitters is less than a threshold number.
14 Citations
23 Claims
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1. A method comprising:
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obtaining, at a mobile device, a rough estimate of a location of said mobile device; identifying a plurality of transmitters within a signal acquisition range of said roughly estimated location; transmitting probe requests addressed to at least some of said transmitters; selectively initiating a passive scan at a receiver of said mobile device if a number of responses to said probe requests received from said transmitters is less than a threshold number; obtaining a position fix of said mobile device based, at least in part, on said passive scan; and restarting a location tracking filter of said mobile device based, at least in part, on said obtained position fix of said mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a mobile device comprising; a wireless transceiver to communicate with a wireless network; and one or more processors programmed with instructions to; obtain a rough estimate of a location of said mobile device; identify a plurality of transmitters within a signal acquisition range of said roughly estimated location; transmit probe requests addressed to at least some of said transmitters; selectively initiate a passive scan at a receiver of said mobile device if a number of responses to said probe requests received from said transmitters is less than a threshold number; obtain a position fix of said mobile device based, at least in part, on said passive scan; and restart a location tracking filter of said mobile device based, at least in part, on said obtained position fix of said mobile device. - View Dependent Claims (11, 12)
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13. An apparatus comprising:
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means for obtaining, at a mobile device, a rough estimate of a location of said mobile device; means for identifying a plurality of transmitters within a signal acquisition range of said roughly estimated location; means for transmitting probe requests addressed to at least some of said transmitters; means for selectively initiating a passive scan at a receiver of said mobile device if a number of responses to said probe requests received from said transmitters is less than a threshold number; means for obtaining a position fix of said mobile device based, at least in part, on said passive scan; and means for restarting a location tracking filter of said mobile device based, at least in part, on said obtained position fix of said mobile device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. An article comprising:
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a non-transitory storage medium having instructions stored thereon executable by a special purpose computing platform to; obtain, at a mobile device, a rough estimate of a location of said mobile device; identify a plurality of transmitters within a signal acquisition range of said roughly estimated location; transmit probe requests addressed to at least some of said transmitters; selectively initiate a passive scan at a receiver of said mobile device if a number of responses to said probe requests received from said transmitters is less than a threshold number; obtain a position fix of said mobile device based, at least in part, on said passive scan; and restart a location tracking filter of said mobile device based, at least in part, on said obtained position fix of said mobile device. - View Dependent Claims (22, 23)
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Specification