Method For Determining The Distance Of A Mobile Communication Terminal From Mobile Radio Base Stations, And Mobile Communication Terminal
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Accused Products
Abstract
In contrast to the related art, in which the distance value is calculated exclusively from the timing advance value, the first mobile radio base station or the mobile communication terminal additionally calculates a second distance value, which is more accurate in comparison with the above distance value but is multi-valued, from the following parameters: a first carrier frequency signal and a second carrier frequency signal with a fixed frequency offset, an initial phase relation at the transmitting site of the first carrier frequency signal with respect to the second carrier frequency signal, and a measured phase relation (MP1) at the receiving site of the first carrier frequency signal with respect to the second carrier frequency signal. The distance between the mobile communication terminal and the first mobile radio base station is determined more precisely by comparing the two distance values. The method can be extended to a plurality of mobile radio base stations. In combination with location data of the mobile radio base stations, it is also possible to determine a location of the mobile communication terminal.
24 Citations
31 Claims
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1-11. -11. (canceled)
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12. A method having parameters for determining a distance of a mobile communication terminal from a first mobile radio base station in a mobile radio network, comprising:
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calculating a first distance value from a timing advance value; and calculating a multi-valued second distance value more accurate than the first distance value, by using parameters including a frequency offset between a first carrier frequency signal and a second carrier frequency signal, an initial phase relation at a transmitting site, of the first carrier frequency signal with respect to the second carrier frequency signal, and a measured phase relation at a receiving site, of the first carrier frequency signal with respect to the second carrier frequency signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A mobile communication terminal to determine a distance of a mobile communication terminal from a first mobile radio base station in a mobile radio network, comprising:
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a first calculation unit to calculate a first distance value from a timing advance value; and a second calculation unit to calculate a multi-valued second distance value more accurate than the first distance value, by using parameters including a frequency offset between a first carrier frequency signal and a second carrier frequency signal, an initial phase relation at a transmitting site, of the first carrier frequency signal with respect to the second carrier frequency signal, and a measured phase relation at a receiving site, of the first carrier frequency signal with respect to the second carrier frequency signal.
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Specification