Terminal positioning method and direction finding system

Abstract

Embodiments of the present invention relate to a terminal positioning method and a direction finding system. The direction finding system includes a communication-connected passive device and an active device, and the passive device is located within the emission range of the active device; the method includes: the passive device is located in the transmission range of the active device. Receive the broadcast information of the base station at the current location; the passive device searches for the communication frequency point according to the frequency point information, and obtains the communication quality of the communication frequency point; the passive device determines the communication frequency point whose communication quality is greater than the threshold value is the first according to the communication quality of the communication frequency point The frequency point, and the communication frequency point whose communication quality is less than or equal to the threshold value is the second frequency point; the passive device sets the first frequency point as the working frequency point of the passive device; the passive device sends the first message to the active device, so that the active device The second frequency point is set as the working frequency point of the active equipment; 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, and the present invention can improve the search efficiency.

Description

technical field [0001] Embodiments of the present invention relate to the field of communications, and in particular, to a terminal positioning method and a direction finding system. Background technique [0002] The equipment used to detect and locate the terminal in the prior art can generally be divided into active equipment and passive equipment. The working principle of the active equipment is to transmit a strong cell signal outward, so that the target terminal is switched 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 t...

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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