Inter-cell synchronization method and base station

Abstract

The invention discloses an inter-cell synchronization method and a base station for saving resources of a system. The inter-cell synchronization method provided by the invention comprises the following steps: a non-synchronous cell periodically searches a synchronization signal from a synchronous cell within the bandwidth range of the synchronization signals of a system; and the non-synchronous cell carries out synchronization with the synchronous cell according to the searched synchronization signal from the synchronous cell. The base station provided by the invention comprises a periodic synchronization signal search unit which is used for periodically searching the synchronization signal from the synchronous cell within the bandwidth range of the synchronization signals of the system; and a periodic synchronization unit which is used for carrying out synchronization with the synchronous cell according to the searched synchronization signal from the synchronous cell. The method and the base station are used for implementing the inter-cell synchronization, thereby saving the resources of the system, simplifying the inter-cell synchronization process, reducing the inter-cell interference and improving the performances of the system.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an inter-cell synchronization method and a base station. Background technique [0002] At present, the technologies that realize the synchronization between multiple cells and can meet the requirements of synchronization accuracy include: absolute time reference, IEEE1588 (Institute of Electrical and Electronics Engineers, Institute of Electrical and Electronics Engineers), Network Time Protocol (NTP, Network Time Protocol), over-the-air Interface self-synchronization, etc. [0003] The so-called absolute time reference means that the base station can be synchronized with an external absolute clock, such as GPS (Global Positioning System), Beidou satellite synchronization and other technologies. For indoor base stations, the satellite signal strength is weak and reception is difficult. [0004] IEEE1588 synchronization technology requires all intermediate nodes i...

AI Technical Summary

Problems solved by technology

Since the synchronization signal is only transmitted on several sub-carriers of the system transmission bandwidth, if the entire system transmission bandwidth is silent (that is, no service data is sent) in order to obtain the synchronization signal, it will cause unnecessary waste of system resources

[0016] Before the initial synchronization is established, it is required to introduce an additional transmission network mechanism (such as NTP) to realize the coarse synchronization operation between non-synchronized cells, and the coarse synchronization operation cannot meet the synchronization accuracy required by the system. For time division duplex (TDD) systems Synchronous area, or Frequency Division Duplex (FDD) / TDD Multimedia Broadcast Multicast Service (MBMS) Single Frequency Network (MBSFN) will cause severe inter-cell interference, leading to system performance degradation

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