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AssigneeNokia Networks Oy
InventorsVille Ruutu, Timo M. Rantalainen, Marko Aulis Alanen, Gudni Gunnarsson, Olli Heikki Antero Hyvarinen
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The invention relates to a method of measuring a time difference and a radio system employing the method, the radio system comprising base stations, terminals, time difference units and a time difference centre. A real time difference RTD of the base station is formed on the basis of measurements carried out by the time difference units by means of an observed time difference OTD and a geometrical time difference GTD in the time difference centre as a function of time, in which case the moment of occurrence of the real time difference RTD measured is connected to the real time difference RTD of the base station.
A method of measuring a time difference, the method being used in a radio system comprising at least two base stations (100 to 104) and a terminal (114, 116), in which radio system an observed time difference OTD of the base stations (100 to 104) is measured and a geometrical time difference GTD is calculated, characterized in that the real time difference RTD of the base stations (100 to 104) is formed by means of the observed time difference OTD and the geometrical time difference GTD as a function of time by connecting the moment of occurrence of the measured real time difference RTD to the real time difference RTD of the base stations (100 to 104).
A radio system comprising at least two base stations (100 to 104) and a terminal (114, 116), a time difference unit (106 to 110) arranged to measure an observed time difference OTD of the base station (100 to 104), and a time difference centre (112) whereto the time difference unit (106 to 104) is arranged to transmit its measuring information, and which radio system has information available on geometrical time differences GTD of the base stations (100 to 104), characterized in that the time difference centre (112) is arranged to form a real time difference RTD of the base stations (100 to 104) as a function of time by utilizing the observed time difference OTD and the geometrical time difference GTD calculated in a manner such that the time difference centre (112) is arranged to connect the moment of occurrence of the real time difference RTD to the real time difference RTD.
Dependencies are inferred from the claim text.