Clock synchronization method and device thereof as well as base station clock device

Abstract

The embodiment of the invention discloses an IEEE1588 based clock synchronization method and device thereof as well as a base station clock device. The method comprises: data messages are exchanged between a secondary clock at a base station side and a system main clock by virtue of Ethernet, thus realizing clock synchronization; after synchronization, the crystal oscillator count value of the secondary clock and the crystal oscillator count value of a local clock at the base station are acquired; the crystal oscillator count value of the secondary clock and the crystal oscillator count valueof the local clock are taken as a reference source, and the adjusted value of the local clock is calculated; and the adjusted value is utilized to adjust the local clock, so that the local clock outputs a clock signal synchronous with the main clock. In the embodiment of the invention, a 1588 message protocol is utilized, and the crystal oscillator count value is adopted to substitute the count value of an external clock signal under the condition that the local clock has no reliable external clock signal input, thus realizing accurate synchronization between the local clock at the base station side and the main clock.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a clock synchronization method and device based on the IEEE1588 protocol, and base station clock equipment. Background technique [0002] Clock synchronization is to align the clocks distributed in various places. One clock can be selected as the standard clock of the system (also called the master clock), and then other clocks in the system (also called the local slave clock) can be synchronized with the standard clock. Compare and realize the synchronization of other clocks in the system with the system standard clock. In the prior art, when a local clock is synchronized, an external reliable clock source needs to be input, and the reliable clock source is used as an input reference clock signal of the local clock to realize clock synchronization between the local clock and the master clock. Usually the external reliable clock source is provided by the 158...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a clock synchronization method, device and base station clock device based on the IEEE1588 protocol to solve the problem that it is difficult to synchronize with the master clock when the existing local clock cannot obtain a reliable clock source signal

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