Method and apparatus for hierarchical map tiling
First Claim
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1. A method for processing assistance data associated with positioning of a mobile device, the method comprising:
- estimating an initial location of the mobile device within an area;
retrieving a subset of hierarchical assistance data associated with the area based on the initial location of the mobile device, wherein a resolution of the retrieved subset of the hierarchical assistance data changes as a function of a distance from the initial location of the mobile device; and
generating a multi-level assistance data structure, for the area, centered at the initial location of the mobile device using the retrieved subset of the hierarchical assistance data wherein the hierarchical assistance data comprise a plurality of levels having mutually distinct resolutions, each level of the plurality of levels including assistance data for an arrangement of points within the area defined according to the resolution for the each level.
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Abstract
A method for processing assistance data associated with positioning of a mobile device as described herein includes estimating an initial location of the mobile device within an area; designating the initial location of the mobile device as a focal point; retrieving a subset of hierarchical assistance data as a function of the focal point; and generating a multi-level assistance data structure for the area centered at the focal point.
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Citations
26 Claims
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1. A method for processing assistance data associated with positioning of a mobile device, the method comprising:
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estimating an initial location of the mobile device within an area; retrieving a subset of hierarchical assistance data associated with the area based on the initial location of the mobile device, wherein a resolution of the retrieved subset of the hierarchical assistance data changes as a function of a distance from the initial location of the mobile device; and generating a multi-level assistance data structure, for the area, centered at the initial location of the mobile device using the retrieved subset of the hierarchical assistance data wherein the hierarchical assistance data comprise a plurality of levels having mutually distinct resolutions, each level of the plurality of levels including assistance data for an arrangement of points within the area defined according to the resolution for the each level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile device operable in a wireless communication network, the mobile device comprising:
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a location estimation module configured to estimate an initial location of the mobile device within an area; an assistance data retrieval module communicatively coupled to the location estimation module and configured to retrieve a subset of hierarchical assistance data associated with the area based on the initial location of the mobile device, wherein a resolution of the retrieved subset of hierarchical assistance data changes as a function of a distance from the initial location of the mobile device; and an assistance data population module communicatively coupled to the assistance data retrieval module and configured to generate a multi-level assistance data structure, for the area, centered at the initial location of the mobile device using the retrieved subset of the hierarchical assistance data, wherein the hierarchical assistance data comprise a plurality of levels having mutually distinct resolutions, each level of the plurality of levels including assistance data for an arrangement of points within the area defined according to the resolution for the each level. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for processing assistance data associated with a positioning operation, the apparatus comprising:
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means for estimating an initial location of the apparatus within an area; means for retrieving a subset of hierarchical assistance data associated with the area based on the initial location of the apparatus, wherein a resolution of the retrieved subset of hierarchical assistance data changes as a function of a distance from the initial location of the apparatus; and means for generating a multi-level assistance data structure for the area centered at the initial location of the apparatus using the retrieved subset of the hierarchical assistance data, wherein the hierarchical assistance data comprise a plurality of levels having mutually distinct resolutions, each level of the plurality of levels including assistance data for an arrangement of points within the area defined according to the resolution for the each level. - View Dependent Claims (20, 21, 22, 23)
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24. A mobile communications device comprising:
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at least one processor configured to execute instructions which, when executed, cause the at least one processor to; estimate an initial location of the mobile communications device within an area; retrieve a subset of hierarchical assistance data associated with the area based on the initial location of the mobile communications device, wherein a resolution of the retrieved subset of hierarchical assistance data changes as a function of a distance from the initial location of the mobile communications device; and generate a multi-level assistance data structure, for the area, centered at the initial location of the mobile communications device using the retrieved subset of the hierarchical assistance data, wherein the hierarchical assistance data comprise a plurality of levels having mutually distinct resolutions, each level of the plurality of levels including assistance data for an arrangement of points within the area defined according to the resolution for the each level; and a memory coupled to the at least one processor and configured to store the instructions. - View Dependent Claims (25, 26)
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Specification