Culled satellite ephemeris information based on accurate distance in range calculations, for quick, accurate assisted locating satellite location determination
First Claim
1. A method of culling a plurality of locating satellites into a sub-plurality for communication, comprising:
- calculating an ellipsoid arc path of each of said plurality of locating satellites that will pass within range of a given site to be located; and
culling said plurality of locating satellites to determine which of said plurality of locating satellites will be within range of said given site for a longest time based on said calculated ellipsoid arc path of each of said plurality of locating satellites.
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Accused Products
Abstract
Locating satellites (e.g., GPS) are culled into a preferred group having a longest dwell time based on a time passing through an ellipsoid arc path through a cone of space, and communicated to mobile devices within a particular region (e.g., serviced by a particular base station). The culled locating satellites may select those visible, or more preferably those locating satellites currently within a cone of space above the relevant base station are selected for communication by a mobile device within the service area of the base station. Alternatively, a minimum set of locating satellites may be selected based on, e.g., being not only within an arbitrary cone of space normal to the base station, but also projected to remain within that cone of space for the longest period of time, i.e., having the longest dwell time, based on a calculated ellipsoid arc path through a cone of space.
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Citations
16 Claims
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1. A method of culling a plurality of locating satellites into a sub-plurality for communication, comprising:
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calculating an ellipsoid arc path of each of said plurality of locating satellites that will pass within range of a given site to be located; and
culling said plurality of locating satellites to determine which of said plurality of locating satellites will be within range of said given site for a longest time based on said calculated ellipsoid arc path of each of said plurality of locating satellites. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for culling a plurality of locating satellites into a sub-plurality for communication, comprising:
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means for calculating an ellipsoid arc path of each of said plurality of locating satellites that will pass within range of a wireless device to be located; and
means for culling said plurality of locating satellites to determine which of said plurality of locating satellites will be within range of said wireless device for a longest time based on said calculated ellipsoid arc path of each of said plurality of locating satellites. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification