CULLED SATELLITE EPHEMERIS INFORMATION FOR QUICK ASSISTED GPS LOCATION DETERMINATION
First Claim
1. A culled satellite list, comprising:
- identification of no more than four GPS satellites within a preferred area above a particular region that a subscriber is to attempt communications with;
wherein said culled satellite list relates to GPS satellites preferred for use by subscribers within a particular region.
4 Assignments
0 Petitions
Accused Products
Abstract
GPS satellites are culled into a minimum, preferred group having a longest dwell time within a cone of space, and communicated to mobile devices or subscribers within a particular region (e.g., serviced by a particular base station). The culling may initially be a list of GPS satellites visible to a particular base station at a particular time. As a preferred culling, only those GPS 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 relevant base station. As an ultimate culling, a minimum set of GPS 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.
4 Citations
16 Claims
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1. A culled satellite list, comprising:
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identification of no more than four GPS satellites within a preferred area above a particular region that a subscriber is to attempt communications with;
wherein said culled satellite list relates to GPS satellites preferred for use by subscribers within a particular region. - View Dependent Claims (2)
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3. A method of assisting GPS location determination by a mobile device in a wireless system, comprising:
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receiving ephemeris data regarding a GPS satellite network;
determining a culled satellite list of no more than four GPS satellites for use by mobile devices in said wireless system; and
communicating said culled satellite list to said mobile device. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. Apparatus for assisting GPS location determination by a mobile device in a wireless system, comprising:
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means for receiving ephemeris data regarding a GPS satellite network;
means for determining a culled satellite list of no more than four GPS satellites for use by mobile devices in said wireless system; and
means for communicating said culled satellite list to said mobile device. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification