Terminal positioning method and direction finding system

Abstract

The embodiment of the invention relates to a terminal positioning method and a direction finding system, the direction finding system comprises passive equipment and active equipment which are in communication connection, and the passive equipment is located in the emission range of the active equipment; the method comprises the following steps: passive equipment receives broadcast information ofa base station at a current position; the passive equipment searches a communication frequency point according to the frequency point information to obtain the communication quality of the communication frequency point; according to the communication quality of the communication frequency points, the passive equipment determines the communication frequency points with the communication quality larger than a threshold value as first frequency points and determines the communication frequency points with the communication quality smaller than or equal to the threshold value as second frequency points; the passive equipment sets the first frequency point as a working frequency point of the passive equipment; the passive equipment sends the first message to the active equipment, so that the active equipment sets the second frequency point as a working frequency point of the active device; and the passive equipment searches the target terminal through the first frequency point and the active equipment searches the target terminal through the second frequency point. According to the invention, the search efficiency can be improved.

Description

technical field [0001] The embodiments of the present invention relate to the communication field, and in particular, to a terminal positioning method and a direction finding system. Background technique [0002] The equipment used to detect and locate terminals in the prior art can generally be divided into active equipment and passive equipment. The working principle of the active equipment is to send out a strong cell signal to make the target terminal switch to the cell controlled by the active equipment. , and then determine that the target terminal is within the transmission range of the active device; the working principle of the passive device is to receive the air interface signal, analyze and decrypt the air interface signal, obtain the characteristic information of the target terminal, and then determine the direction and approximate direction of the target terminal relative to the passive device Location. The advantage of the active device is that once the targe...

AI Technical Summary

Problems solved by technology

The advantage of the active device is that once the target terminal is captured, it can control the target terminal to transmit signals at a certain transmission power, and the counting efficiency is high. The disadvantage is that its work needs to transmit high-power cell signals, so that the signal of the active device cell is stronger than that of the public. Network signal, so that the target terminal can be switched to the active device transmitting cell, resulting in a small range of action of the active device, and a small chance of capturing the target terminal in the early stage; while the passive device only needs to receive communication information, theoretically as long as it is in public The target terminal can be captured within the cell coverage of the network, and the range of action is large, but a relatively strong public network signal is required for actual work, and it is also difficult to decipher communication information, resulting in lower efficiency than active devices.

[0003] Common terminal detection and positioning methods usually use a single active device or a single passive device for positioning. However, due to the shortcomings of both the active device and the passive device in the above method, it is difficult to quickly locate the target in some environments.

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