Quick positioning method based on wireless TOF and system thereof

Abstract

The invention provides a quick positioning method based on wireless TOF and a system thereof. The method comprises the following steps of 1, broadcasting a ranging request to at least three base stations through a to-be-positioned label; 2, after each base station in the first step receives the ranging request, transmitting a response message to the label by the base stations according to a preset time sequence in a server; 3, after the label collects all response messages in the step 2, generating a final message through label gathering, and broadcasting the final message to each base station; 4, after each base station receives the final message, extracting corresponding time stamp data by each base station according to the respective ID, and calculating the distance between each base station and the label; and 5, calculating the position of the label by a server according to the distance between each base station and the label. The quick positioning method and the system thereof have advantages of realizing high-efficiency positioning, improving system capacity and reducing power consumption.

Description

technical field [0001] The invention relates to the technical field of wireless positioning, in particular to a fast positioning method and system based on wireless TOF. Background technique [0002] Wireless two-way symmetric ranging (SDS-TWR) is a high-precision ranging method, such as the TOF ranging method. [0003] The TOF ranging method can be understood as the Time of Flight Measurement method, which mainly uses the flight time of the signal to and fro between two asynchronous transceivers to measure the distance between nodes. [0004] refer to figure 1 To illustrate the basic principle of TOF ranging, the local node A sends a Poll data packet to the remote node B, and when Node B receives the Poll data packet, it will automatically respond with a Response data packet. Node A records the time elapsed from sending the Poll packet to receiving the Response packet as T TOT ; Node B records the elapsed time from receiving the Poll data packet to sending the Response d...

AI Technical Summary

Problems solved by technology

[0007] Assuming that the time-consuming of each ranging is equal, if a ranging takes 2ms, it takes 8ms to complete the ranging with four base stations, and it takes 16ms to complete the ranging with eight base stations. Since each tag needs to measure with all base stations in turn distance, leading to inefficiency of the positioning system, and as the number of base stations increases, the efficiency of the positioning system decreases proportionally

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