A Synchronization Method for Multi-Hop Air Interfaces in Small Cells

Abstract

The invention relates to a method for synchronizing multi-hop empty openings of a micro-cell. The method comprises the following steps: performing synchronous grading on the micro-cell or a macro-cell in the preset network deployment; confirming an optimal to-be-selected source cell subset corresponding to the micro-cell for each micro-cell in the preset network deployment; measuring the propagation delay of each micro-cell and each source cell substation in the optimal to-be-selected source cell subset thereof; storing a measuring result and a cell identifier of the corresponding optimal source cell into a target micro-cell; and utilizing the cell identifier of each source cell to scramble an empty opening synchronizing signal sent by each source cell, thereby distinguishing the empty opening synchronizing information sent by different source cells. According to the method for synchronizing the multi-hop empty openings of the micro-cell provided by the invention, the limitation of the traditional cell synchronizing scheme at the aspect of the synchronizing of the micro-cell empty openings can be broken through, and meanwhile, the precision of the synchronizing of the micro-cell empty openings can be increased.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a multi-hop air interface synchronization method for a small cell. Background technique [0002] With the development of society and the advancement of science and technology, all kinds of mobile smart terminals can be seen everywhere in life, and people have put forward higher requirements for the rate of mobile data and the capacity of network systems. To cope with the explosive growth of mobile data services in the future, the communications industry has proposed many solutions and technologies, such as millimeter wave, non-orthogonal multiple access technology, massive MIMO technology, and small cell technologies. Among them, the small cell technology is one of the most effective methods to solve the system capacity and information rate, and it is also one of the key technologies of the future 5G communication system. Small cell technology densely deploys small ba...

AI Technical Summary

Problems solved by technology

In this case, the synchronization between small cells has strong reliability and high precision, but the disadvantage is that satellite signals cannot penetrate indoors at present, and antennas must be arranged outdoors, so indoor scenarios cannot be applied, and there are certain problems. application limitations

However, this solution requires that all cells and time server nodes can support the IEEE 1588 protocol, which leads to some cell base stations that do not have or do not support the protocol cannot obtain network synchronization in this way

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