A user equipment positioning method based on dual base stations

Abstract

The invention discloses a user device UE positioning method based on two base stations. The user device UE positioning method includes the steps that a UE receives signals sent by the two base stations for positioning, and determines the receiving time and the sending time of the signals of the two base stations; according to the receiving time and the sending time of the signals of the two base stations, two to-be-selected coordinate points (a1, b1) and (a2, b2) are determined; the two base stations obtain the AOA angle information k1 and k2 of the UE respectively; according to the two to-be-selected coordinate points and the AOA angle information of the UE, the distance sums of the two to-be-selected coordinate points and the AOA linear straight lines of the two base stations are calculated respectively, and the to-be-selected coordinate points with the small distance sums are selected as the position coordinates of the UE. The user device UE positioning method is applied, and accurate positioning of the UE can be achieved based on the two base stations.

Description

technical field [0001] The present application relates to communication technologies, and in particular to a user equipment positioning method based on dual base stations. Background technique [0002] In a wireless communication system, many processes on a user equipment (UE) need to obtain location information of the user. There are many ways to obtain user location information, two of which are described below: [0003] (1) TA+AOA positioning technology [0004] The CELL_ID positioning method is a positioning method based on cell coverage, which uses known geographical information of the serving cell to estimate the position of the target UE. Based on the CELL_ID positioning method, TA+AOA considers the factors of timing advance and incoming wave direction, so as to achieve more accurate positioning. [0005] The base station obtains the AOA of the signal transmitted by the UE through the smart antenna. The UE is on the ray starting from the base station, and the angle...

AI Technical Summary

Problems solved by technology

[0009] The above two methods have certain limitations and defects in practical applications. For the TA+AOA positioning technology, more accurate AOA angle information is required, and the deviation of the angle information has a greater impact on the positioning accuracy. AOA angle information will have a certain deviation, so the positioning accuracy is not high in practical applications

When OTDOA technology is used for UE positioning, the coordination of three base stations is required to achieve accurate positioning. When there are only two base stations, the UE cannot be accurately positioned by this method. This positioning method has a limit on the number of base stations.

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