Method and system for providing location assistance information to a mobile station
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Abstract
A method for providing location assistance information to a mobile station of a communications network is discussed. Visibilities of a plurality of satellites of a satellite positioning system with respect to the mobile station are estimated. A group of said plurality of satellites with the best estimated visibilities with respect to the mobile station is selected, and location assistance information relating to at least said group of satellites is sent to the mobile station.
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Citations
54 Claims
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1-27. -27. (canceled)
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28. Method for providing location assistance information to a mobile station of a communications network, the method comprising the steps of:
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estimating visibilities of a plurality of satellites with respect to the mobile station, said plurality of satellites being satellites of a satellite positioning system, selecting a group of said plurality of satellites with the best estimated visibilities with respect to the mobile station, and sending to the mobile station location assistance information relating to at least said group of satellites, wherein location information relating to said group of satellites is sent in an order dependent on the estimated visibilities with respect to the mobile station. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A network element for providing location assistance information to a mobile station of a communications network, the network element being configured to
estimate visibilities of a plurality satellites with respect to a mobile station, said satellites being satellites of a satellite positioning system, select a group of said plurality of satellites with the best estimated visibilities with respect to the mobile station, and send to a mobile station location assistance information relating to at least said group of satellites, wherein location information relating to said group of satellites is sent in an order dependent on the estimated visibilities with respect to the mobile station.
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52. A communications system for providing location assistance information, comprising
at least one reference receiver of a satellite positioning system for obtaining location assistance information relating to satellites of the satellite positioning system, means for estimating visibilities of a plurality of satellites of the satellite positioning system with respect to a mobile station, means for selecting a group of said plurality of satellites with the best estimated visibilities with respect to the mobile station, and means for sending to the mobile station location assistance information relating to said group of satellites, wherein location information relating to said group of satellites is sent in an order dependent on the estimated visibilities with respect to the mobile station.
Specification