| CPC G01S 5/01 (2020.05) [G01S 19/34 (2013.01); G01S 19/48 (2013.01); H04W 4/02 (2013.01); H04W 4/025 (2013.01)] | 9 Claims |

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1. A method of determining a location of a mobile device, comprising:
defining a target region having a polygonal or circular shape;
defining a plurality of zones, each of the zones defining a region of space that is a respective predetermined distance from a target located in the target region;
defining a respective requested locational accuracy for each of the plurality of zones, wherein zones closer to the target have a higher accuracy than zones farther from the target;
defining a respective locational update frequency for each of the plurality of zones, wherein zones closer to the target update in response to less movement than zones farther from the target;
determining in which of the plurality of zones a mobile device is located;
selecting the requested locational accuracy based on the determined zone;
determining a location of the mobile device according to the selected requested locational accuracy;
selecting the locational update frequency based on the determined zone; and
updating the location of the mobile device according to the selected locational update frequency.
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