Patent ID: 8565782
Filing Date: 2013-10-22
Classification: H04J,H04W

Abstract:
1. A method for determining a position of a target User Equipment (UE) in a cellular mobile telecommunication network, where the cellular mobile telecommunication network comprises a plurality of radio base stations (RBS) to communicate wirelessly with UEs, at least one radio network controller to control at least one of said RBSs, the method comprising: identifying a RBS to which the target UE is connected, making a location of the identified RBS known, selecting a first additional UE and a second additional UE, where at least one of the first additional UE and the second additional UE is connected to a RBS that is different from the RBS to which the target UE is connected, receiving information associated with measurement of a round-trip-time between the target UE and the identified RBS, obtaining information associated with measurement of a round-trip-time between the first additional UE and the RBS to which the first additional UE is connected, obtaining information associated with measurement of a round-trip-time between the second additional UE and the RBS to which the second additional UE is connected, receiving information associated with measurements between the target UE and the first additional UE, receiving information associated with measurements between the target UE and the second additional UE, receiving information associated with measurements between the first additional UE and the second additional UE, and determining the position of the target UE by using the location of the identified RBS and the received information.