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  Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennasUSPTO Application #: 20060082499Title: Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas 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. (end of abstract)
Agent: Manelli Denison & Selter PLLC 7th Floor - Washington, DC, US Inventors: Lance Douglas Pitt, Leslie Johann Lamprecht, Jeffrey Thomas Martin USPTO Applicaton #: 20060082499 - Class: 342357150 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20060082499. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] This application claims priority from U.S. Provisional Application 60/618,606, filed Oct. 15, 2004, the entirety of which is expressly incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates generally to wireless and long distance carriers, Internet service providers (ISPs), and information content delivery services/providers and long distance carriers. More particularly, it relates to location services for the wireless industry. [0004] 2. Background of Related Art [0005] It is desired to accurately locate cell phones within a cellular network. While there are several techniques for determining location in a mobile device, a future generation of mobile phones may include a global positioning satellite (GPS) receiver chipset, thus having the ability to locate itself via GPS. [0006] FIG. 10 depicts the conventional Global Positioning Satellite system including about 24 or more GPS satellites. [0007] In particular, as shown in FIG. 10, the earth 200 is surrounded by approximately 24 GPS satellites 101-124, which each have their own rotational orbit about the earth 200. There are currently about 24 to 27 GPS satellites in the GPS network, each moving about the earth approximately 6 times each day. [0008] Unfortunately, as the phone moves about the country, locations with respect to satellites change. Thus, GPS devices attempting to determine their position with respect to the earth 200 will only be able to communicate with a smaller number of the total GPS satellites at any one time. [0009] The time required for lock in and location determination by a conventional GPS receiver in determining which of the GPS satellites in the GPS network takes several minutes, and as many as 5 or 6 minutes for a standard GPS receiver, which is longer than many if not most phone calls. [0010] There is a need for a less cumbersome and more efficient technique for using GPS location information in a highly mobile and fast paced society. SUMMARY OF THE INVENTION [0011] In accordance with one aspect of the present invention, a method and apparatus for culling a plurality of locating satellites into a sub-plurality for communication via a wireless base station, comprises defining an inverted cone above a reference point physically distant from a relevant mobile device. The plurality of locating satellites are culled to a culled group of locating satellites within the inverted cone above the reference point. An identity of the culled group of locating satellites is passed to the relevant mobile device. BRIEF DESCRIPTION OF THE DRAWINGS [0012] Features and advantages of the present invention will become apparent to those skilled in the art from the following description with reference to the drawings, in which: [0013] FIG. 1 shows a base station of a wireless network (e.g., a cellular telephone network) determining which GPS satellites are in a preferred group, e.g., being within a cone of space with the longest dwell time within that space, in accordance with the principles of the present invention. [0014] FIG. 2 shows a top view of the cone of space as shown in FIG. 1. [0015] FIG. 3 shows vector calculations for each GPS satellite, or for each of a preferred set of GPS satellites (e.g., those visible to the base station), in accordance with the principles of the present invention. [0016] FIG. 4 shows an exemplary culled GPS satellite table, in accordance with the principles of the present invention. [0017] FIG. 5 shows an alternate exemplary culled GPS satellite information table, in accordance with the principles of the present invention. [0018] FIGS. 6A and 6B show use of the calculation of an ellipsoid arc path actually traveled by each satellite to determine more accurately the length of time a locating satellite is within range of a particular location, in accordance with another embodiment of the present invention. [0019] FIGS. 7A, 7B(1) and 7B(2) show adjustment of the computation of the arc that defines the inverted cone encompassing culled satellites as a function of latitude, or distance from the equator, in accordance with yet another embodiment of the present invention. [0020] FIG. 8 shows the utilization of wireless communication system cell cites as reference points, in accordance with a further embodiment of the present invention. [0021] FIG. 9A(1) shows an exemplary culled locating satellite table including primary and secondary satellites, in accordance with an aspect of the present invention. Continue reading... Full patent description for Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas or other areas of interest. ### Previous Patent Application: Culled satellite ephemeris information based on accurate distance in range calculations, for quick, accurate assisted locating satellite location determination Next Patent Application: Prioritized list of potential culled satellite ephemeris information for quick, accurate assisted locating satellite location determination Industry Class: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) ### FreshPatents.com Support Thank you for viewing the Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas patent info. 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