Method and apparatus for realizing clock redundancy back-up in WCDMA system base station

Abstract

The present invention relates to a method for implementing clock redundancy backup in base station of WCDMA system and its equipment. Said equipment includes two clock plates and service plates. The system reference source input signal can be simultaneously transferred into the described two clock plates, said described two clock plates can respectively utilize a clock bus to transfer the produced 30.72MHz working clock signal into service plate. The working clock signal outputted by main / backup clock plates adopting said method can be produced by using clock signal of same clock plate as reference double frequency, when switching, the phases of all the service plates can be smoothly transited and can continuously retain synchronization, and the phase change rate can be accurately controlled, so that it can implement clock redundancy backup and quick and smooth switching.

Description

technical field [0001] The invention relates to a method and device for realizing clock redundancy backup in a wideband code division multiple access communication system, in particular to a method and device for realizing clock redundancy backup in a base station of a WCDMA system. Background technique [0002] In a WCDMA system, in order to realize high-speed real-time transmission of data, it is generally required to keep the frequency and phase synchronization of the working clock between base stations and among the boards in the base station. The usual method is to first restore the clock reference from the communication link of the upper level, and use this as a reference to lock the 30.72MHz base station working clock required by the system, and then distribute it to each service board in the base station. The generation and processing of the working clock Allocation is done by the clock board. [0003] In order to avoid the paralysis of the entire base station due t...

AI Technical Summary

Problems solved by technology

This kind of soft switching needs to change the adjustment algorithm used by the adjustment algorithm module to control the phase change. The advantage is that it can achieve approximately smooth switching. The disadvantage is that the implementation is more complicated. Whether it is implemented by analog or digital methods, complex changes are required. Algorithm processing, so it is necessary to delay the switching time

In addition, between the main clock board and the standby clock board, because the standby clock board uses the working clock output by the main clock board as a phase reference, and then outputs it after readjustment, the phase of the working clock output by the standby clock board is the same as that of the working clock output by the main clock board. There is a large delay between phases

[0005] The dual-bus, soft-handover base station clock board redundancy technical solution of the above-mentioned prior art has the problems of switching time delay, complex adjustment algorithm, and phase delay between the output working clock signals of the two clock boards, so that the output between the two clock boards The phase consistency of the working clock signal is not easy to guarantee when switching

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