Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas
First Claim
1. A method of culling a plurality of locating satellites into a sub-plurality for communication via a wireless base station, comprising:
- defining an inverted cone above a reference point physically distant from a relevant mobile device;
defining a first group of satellites, said first group of satellites being a highest priority for determining a location of said relevant mobile device;
defining a second group of satellites, said second group of satellites being a lower priority for determining a location of said relevant mobile device relative to said highest priority;
culling said plurality of locating satellites to a culled group of locating satellites comprising said first group of satellites and said second group of satellites within said inverted cone above said reference point, said culled group being determined based on a dwell time of said plurality of locating satellites within said inverted cone.
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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. The inverted cone of space may be defined for each antenna structure for any given base station, and each has 360 degrees of coverage, or less than 360 degrees of coverage, with relevant locating satellites. Thus, cell sites may be specifically used as reference points for culling the ephemeris information used to expedite Assisted GPS location determinations.
26 Citations
20 Claims
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1. A method of culling a plurality of locating satellites into a sub-plurality for communication via a wireless base station, comprising:
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defining an inverted cone above a reference point physically distant from a relevant mobile device; defining a first group of satellites, said first group of satellites being a highest priority for determining a location of said relevant mobile device; defining a second group of satellites, said second group of satellites being a lower priority for determining a location of said relevant mobile device relative to said highest priority; culling said plurality of locating satellites to a culled group of locating satellites comprising said first group of satellites and said second group of satellites within said inverted cone above said reference point, said culled group being determined based on a dwell time of said plurality of locating satellites within said inverted cone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Apparatus for culling a plurality of locating satellites into a sub-plurality for communication via a wireless base station, comprising:
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means for defining an inverted cone above a reference point physically distant from a relevant mobile device; means for defining a first group of satellites, said first group of satellites being a highest priority for determining a location of said relevant mobile device; means for defining a second group of satellites, said second group of satellites being a lower priority for determining a location of said relevant mobile device relative to said highest priority; means for culling said plurality of locating satellites to a culled group of locating satellites comprising said first group of satellites and said second group of satellites within said inverted cone above said reference point, said culled group being determined based on a dwell time of said plurality of locating satellites within said inverted cone; and means for passing an identity of said culled group of locating satellites comprising said first group of locating satellites and said second group of satellites to said relevant mobile device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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- Resources
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Current AssigneeTeleCommunication Systems Inc (Comtech Telecommunications Corporation)
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Original AssigneeTeleCommunication Systems Inc (Comtech Telecommunications Corporation)
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InventorsLamprecht, Leslie Johann, Martin, Jeffrey Thomas, Pitt, Lance Douglas
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Primary Examiner(s)Tarcza, Thomas H.
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Assistant Examiner(s)Mull, Fred H.
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Application NumberUS11/342,837Time in Patent Office238 DaysField of Search342/357.15, 342/357.09US Class Current342/357.42CPC Class CodesG01S 19/05 providing aiding data
