Patent ID: 7031722

Claim:
A method for locating a mobile station in a mobile telecommunication system comprising the steps of: using fixed transmitting stations for positioning a target mobile station by transmitting a location signal from each fixed transmitting station to said target mobile station and receiving a response to said location signal from said target mobile station by said fixed transmitting stations, using at least one relay station which is configured to receive said location signal from the corresponding fixed transmitting station and said response from said target mobile station, and to forward said location signal and said response to said target mobile station and said fixed transmitting stations, respectively, in case a direct transmission from or to at least one of said fixed transmitting stations is not available, determining a position of said at least one relay station, determining a distance between said target mobile station and the fixed transmitting stations and/or the at least one relay station on a basis of said location signal, and locating a position of said target mobile station on a basis of the determined distances, wherein said at least one relay station is a movable mobile station, and wherein a distance D between said at least one relay station and said target mobile station is calculated based on the following equation D=cΔt+βd max, wherein c is a light velocity, Δt is a propagation delay of the location signal, β is in a range from −1 to +1, and dmax is a maximum distance by which the at least one relay station can move during Δt.