Clock synchronization method, clock synchronization device and clock synchronization system

Abstract

The embodiment of the invention discloses a clock synchronization method, a clock synchronization device and a clock synchronization system. The method comprises the following steps: acquiring a line clock from a transmission network; and synchronizing a local clock of a base station and the line clock when a satellite timing system is unavailable. In the embodiment of the invention, under the condition of the unavailability of the satellite timing system, the line clock is acquired from the transmission network and then is synchronized with the local clock, which improves local clock accuracy keeping performance and improves the reliability of the system on the basis of not increasing cost.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a clock synchronization method, device and system. Background technique [0002] In the communication field, good network synchronization performance has a great impact on business performance. Poor synchronization often brings a series of problems. In wireless networks, synchronization problems are particularly important. Many problems such as poor voice quality, high call drop rate, low handover success rate, and inability to access are largely synchronized with the network. related to poor performance. [0003] In wireless base station equipment, accurate time synchronization between base stations is required. At present, the main synchronization solution is to use satellite timing systems such as GPS (Global Positioning System, Global Satellite Positioning System) to provide timing references for base station equipment. Under normal satellite receiver conditi...

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Problems solved by technology

[0006] The cost of the rubidium clock / dual temperature bath crystal oscillator is more than several times the cost of a general local clock reference such as a single temperature bath crystal oscillator. In addition, the rubidium clock / dual temperature bath crystal oscillator has higher power consumption and a larger volume and less reliable

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