Method and system for realizing precise positioning of user equipment (UE)

Abstract

The invention discloses a method and a system for realizing precise positioning of user equipment (UE). The method is suitable for being used in a macro-base station-micro-base station network deployment scene sharing an ID (identity) of a cell, and the method comprises the following steps of: alternately sending positioning reference signals (PRS) by all base stations according to corresponding preset time deviation values in a sending cycle which is determined according to the total number of micro-base stations in the scene; deploying the sending cycle and the preset time deviation value corresponding to each base station to the UE and binding the preset time deviation value to the position of each base station; and positioning by the UE according to the received PRS in the sending cycle. According to the technical scheme disclosed by the invention, the complexity is lower, the UE requirements are lower and the cost of a terminal can be reduced; and simultaneously, as the PRS which are received by the UE and from a plurality of different positions are not superimposed on a spatial domain, the interference is reduced and the problem of inaccurate positioning of the UE is avoided.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and system for realizing precise positioning of user equipment UE. Background technique [0002] In the future heterogeneous wireless network, there is generally a macro base station with a large coverage area, and there are multiple micro base stations with a small coverage area, located within the coverage area of ​​the macro base station, to fill the blind spot for the macro base station or further improve the transmission quality , to improve user experience. In this kind of network deployment, there are two options: one is that the macro base station and the micro base station have their own distinctive cell IDs, so that each micro base station builds its own cell; the other is that the macro base station Sharing the same cell ID with the micro base station, under this deployment, the interference problem between different cells and the problem of frequent handove...

AI Technical Summary

Problems solved by technology

However, for the macro base station-micro base station network deployment scenario where the cell ID is shared, considering the interference between positioning signals, in general, only the macro base station sends the positioning reference signal PRS, while other micro base stations that share the cell ID with the macro base station Not sending, in this case, the positioning range of the UE can only be limited to the range of the macro base station. In the best case, it is a certain area of ​​the macro base station, but the resources of the micro base station are not fully utilized, and relatively accurate positioning cannot be achieved

If in order to increase the power of the UE receiving PRS, allowing the macro base station and the micro base station to send the same PRS with time and frequency synchronization at the same time, on the one hand, it will cause high complexity. On the other hand, what the UE receives is the macro base station and the micro base station. The effect of spatial superposition of the PRS space cannot represent a specific base station, which will lead to a large error in the positioning of the UE

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