Claims
- 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.
- 2. The culled satellite list according to claim 1, wherein:
said area above said particular region is defined having a cone shape.
- 3. A method of assisting GPS location determination by a mobile device in a wireless system, comprising:
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.
- 4. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 3, further comprising:
periodically updating said culled satellite list.
- 5. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 4, wherein:
said culled satellite list is revised in a central location with respect to mobile devices in said wireless system.
- 6. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 3, further comprising:
providing said culled satellite list to mobile devices in said wireless system only when said culled satellite list changes.
- 7. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 3, wherein:
said wireless system is a cellular telephone system.
- 8. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 3, wherein said determining comprises:
determining a vector to each available GPS satellite from a particular region point of reference; and selecting only those GPS satellites most desirable for communications with mobile devices in said wireless system.
- 9. The method of assisting GPS location determination by a mobile device in a wireless system according to claim 8, wherein said determining further comprises:
culling based on a longest dwell time within a given region of a plane above said point of reference.
- 10. Apparatus for assisting GPS location determination by a mobile device in a wireless system, comprising:
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.
- 11. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 10, further comprising:
means for periodically updating said culled satellite list.
- 12. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 11, wherein:
said culled satellite list is revised in a central location with respect to mobile devices in said wireless system.
- 13. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 10, further comprising:
means for providing said culled satellite list to mobile devices in said wireless system only when said culled satellite list changes.
- 14. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 10, wherein:
said wireless system is a cellular telephone system.
- 15. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 10, wherein said means for determining comprises:
means for determining a vector to each available GPS satellite from a particular region point of reference; and means for selecting only those GPS satellites most desirable for communications with mobile devices in said wireless system.
- 16. The apparatus for assisting GPS location determination by a mobile device in a wireless system according to claim 15, wherein said means for determining further comprises:
means for culling based on a longest dwell time within a given region of a plane above said point of reference.
Parent Case Info
[0001] This application claims priority from U.S. Provisional Application No. 60/382,367 filed May 23, 2002, to Lance Douglas Pitt, entitled “Culled Satellite Ephemeris Information For Quick Assisted GPS Location Determination”, the entirety of which is explicitly incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
|
60382367 |
May 2002 |
US |