Method and system for mobile station location
First Claim
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1. A method of estimating an accuracy of a range measurement comprising:
- determining an intersection point from a plurality of received wireless signal rays;
partitioning said rays into clusters;
determining an average delay time and a received signal power for each said cluster based on said received wireless signal rays;
determining an expected accuracy and an accuracy function based on said average delay time and said received signal power, where said accuracy function comprises directional properties of said cluster and properties of the receiver for receiving said wireless signal rays; and
presenting an estimated range measurement accuracy based on said expected accuracy and said accuracy function.
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Abstract
A system and method for locating mobile stations in a wireless communication system such as a cellular system based on at least one received wireless signal and a database of geographical information.
35 Citations
19 Claims
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1. A method of estimating an accuracy of a range measurement comprising:
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determining an intersection point from a plurality of received wireless signal rays; partitioning said rays into clusters; determining an average delay time and a received signal power for each said cluster based on said received wireless signal rays; determining an expected accuracy and an accuracy function based on said average delay time and said received signal power, where said accuracy function comprises directional properties of said cluster and properties of the receiver for receiving said wireless signal rays; and presenting an estimated range measurement accuracy based on said expected accuracy and said accuracy function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a plurality of receivers to receive respective instances of a plurality of wireless signal rays; a plurality of location measurement units associated with said plurality of receivers to determine properties of received wireless signals rays; a location manager, comprising a processor and a memory, the processor to; partition said rays into clusters, determine an average delay time and a received signal power for each said cluster based on said received wireless signal rays; determine an expected accuracy and an accuracy function based on said average delay time and said received signal power, wherein said accuracy function comprises directional properties of said cluster and properties of the receiver for receiving said wireless signal rays; and present an estimated range measurement accuracy based on said expected accuracy and said accuracy function. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification