Confirming method of synchronization sequence in multipoint collaborative environment, synchronizing method and device

Abstract

The invention discloses a confirming method of a synchronization sequence in a multipoint collaborative environment, comprising the following steps of: confirming the length L of a synchronization code sequence with the characteristics of a zero correlation window, a group number M and the length ZCZ of the zero correlation window, wherein the L, the M and the ZCZ satisfy the flowing relation: L=22*n+m+1, M=2*n+1, ZCZ=2*n+m+1, n is an integer not smaller than 0, and m is a positive integer; and periodically rearranging the synchronization code sequence in a time domain to acquire the synchronization sequence of the system. The invention also discloses a synchronizing method in the multipoint collaborative environment, comprising the following steps of: carrying out the delay-based autocorrelation synchronization of a received signal by a user terminal to confirm a signal segment bearing the synchronization sequence; and carrying out cross-correlation calculation of the signal segment bearing the synchronization sequence by utilizing the synchronization sequence stored in the user terminal, wherein an initial signal peak value confirmed by the cross-correlation calculation is the start position of the signal bearing the synchronization sequence. The invention also discloses a device of the method and improves the synchronization performance of UE (User Equipment) on the edge of a district.

Description

technical field [0001] The present invention relates to downlink synchronization technology, in particular to a method and device for determining a synchronization sequence in a Coordinated Multi-Point (CoMP, Coordinated Multi-Point) environment in a Long Term Evolution (LTE, Long Term Evolution) system, and a synchronization method in a Coordinated Multi-Point environment with the device. Background technique [0002] The third-generation (3G, Third Generation) evolved system represented by the LTE system has realized a phased change in mobile communication after 3G, and is closer to people's vision for the next-generation mobile communication system. LTE already has the characteristics of fourth generation (4G, Fourth Generation) communication technology to a large extent. At present, the quasi-4G standards with higher voices include LTE of the Third Generation Partnership Project (3GPP, Third Generation Partnership Project) and Ultra Mobile Broadband (UMB, Ultra Mobile B...

AI Technical Summary

Problems solved by technology

If the synchronization sequence used by these antenna sites to serve user equipment (UE, User Equipment) still follows the ZC sequence in the LTE base station, because the distance between the antenna sites is greatly reduced compared with the original LTE cell, so at this time The interference received by the UE from other antenna site synchronization sequences will increase significantly, which will seriously affect the accuracy of synchronization timing

And at this time, the antenna sites of different cells at the edge of the cell work together, so for a user in a certain cell, the signal power transmitted by these antenna sites should be strong enough to make the user normally receive the data transmitted by the antenna sites, so if these If the cross-correlation characteristics of the antenna site synchronization sequence are not ideal, it will directly affect the synchronization process of each UE within its coverage area

[0006] Therefore, if the LTE synchronization scheme (synchronization sequence and corresponding synchronization algorithm) is still used in the CoMP environment, it will have a greater impact on the synchronization performance of multi-cell edge users.

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