Mobile positioning using intergrated ad-hoc network
First Claim
1. A mobile station positioning method for a cellular communications system comprising,evaluating an initial position estimate of a target mobile station, the initial position estimate having an initial area of uncertainty,evaluating a position estimate of a further mobile station also having an area of uncertainty,evaluating an estimate of distance between said target mobile station and said further mobile station, andusing said initial position estimate of a target mobile station, said position estimate of a further mobile station, and said estimate of distance between said target mobile station and said further mobile station to evaluate a new position estimate of the target mobile station having an area of uncertainty less than said initial area of uncertainty.
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Abstract
A mobile station positioning method for a cellular communications system includes evaluating an initial position estimate of a target mobile station having an initial area of uncertainty, evaluating a position estimate of a further mobile station of the system, estimating distance between the target and further mobile stations and using the position and distance estimates to evaluate a new position estimate of the target mobile station having a reduced area of uncertainty. Bi-circular and tri-circular methods are described.
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Citations
18 Claims
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1. A mobile station positioning method for a cellular communications system comprising,
evaluating an initial position estimate of a target mobile station, the initial position estimate having an initial area of uncertainty, evaluating a position estimate of a further mobile station also having an area of uncertainty, evaluating an estimate of distance between said target mobile station and said further mobile station, and using said initial position estimate of a target mobile station, said position estimate of a further mobile station, and said estimate of distance between said target mobile station and said further mobile station to evaluate a new position estimate of the target mobile station having an area of uncertainty less than said initial area of uncertainty.
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16. A mobile station positioning method for a cellular communications system comprising,
evaluating an initial position estimate of a target mobile station, the initial position estimate having an initial area of uncertainty, evaluating a position estimate of a further mobile station having a further area of uncertainty, evaluating an estimate of distance between said target mobile station and said further mobile station, and reducing said initial area of uncertainty so that the resultant reduced area of uncertainty does not extend beyond said further area of uncertainty by more than the estimated distance.
Specification