Method for Synchronization of Assemblies in a Base Station
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Abstract
A method synchronizes assemblies in a base station to a reference clock signal. A local clock signal and a frame are formed in a first assembly. The clock signal and the frame are transmitted, using a synchronous transmission with a predictable propagation time, to a second assembly. A reference clock signal is received in the second assembly, and a phase difference and a time difference between the transmitted clock signal on the one hand and the reference clock signal on the other hand are determined. The phase difference and the time difference are transmitted from the second assembly to the first assembly via a link without a predictable propagation time. The phase difference and the time difference are used in the first assembly to determine a manipulated variable which controls the formation of the local clock signal, such that the first and the second assemblies are synchronized in time.
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Citations
29 Claims
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1-11. -11. (canceled)
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12. A method for synchronization of assemblies in a base station with a reference clock signal, comprising:
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forming a local clock signal and a frame by a first assembly; transmitting the local clock signal and the frame to a second assembly by using a synchronous transmission with a predictable propagation time; receiving the reference clock signal at the second assembly; determining a phase difference and a time difference at the second assembly, the phase difference and the time difference being determined between the local clock signal and the frame, on the one hand, and the reference clock signal, on the other hand; transmitting the phase difference and the time difference from the second assembly to the first assembly via a link without a predictable propagation time; and using the phase difference and the time difference at the first assembly to determine a manipulated variable that controls formation of the local clock signal such that the first and second assemblies are synchronized in time. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An assembly in a base station, comprising:
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a phase indicator and a time indicator to receive a local clock signal, a frame, and a reference clock signal for determining a phase difference and a time difference between the local clock signal and the reference clock signal; and a transmitter to transmit the phase difference and the time difference for synchronization.
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Specification