An Indoor Positioning System Based on Multiple Existing Communication Networks

Abstract

The invention relates to an indoor positioning system based on multiple existing communication networks. The indoor positioning system comprises a plurality of APs and an intelligent device to be positioned. The indoor positioning system further comprises a control chip and a central processor; the plurality of APs are wirelessly connected with the intelligent device through respective communication networks; the central processor is connected with the APs; the control chip is connected with the central processor; the plurality of APs communicate with the intelligent device through respective communication networks and receive signals; the central processor acquires the position information of the intelligent device according to the signals received by the plurality of APs; and the control chip selects communication networks of the APs and the intelligent device and APs which communicate with the central processor. Compared with the prior art, and according to the indoor positioning system of the invention, based on the difference of diffraction abilities and the difference of positioning precisions of signals of different frequencies, indoor combined positioning is performed. The indoor positioning system has the advantages of high measurement precision, simple structure, low cost and the like.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an indoor positioning system based on multiple existing communication networks. Background technique [0002] With the progress of society, the continuous development of information technology, and the drive of business, people's requirements for accurate indoor positioning services are becoming more and more urgent. For example, when people are in a large shopping mall, when a fire breaks out, traditional GPS positioning signals cannot penetrate high-rise buildings, so the positioning system fails, and firefighters cannot locate people who may be in a coma, thus delaying the best time for treatment. Therefore, there is an urgent need for an accurate indoor positioning technology, which can find people in distress by locating the user's smart handheld device. In recent years, indoor positioning technology has gradually become a research hotspot, constantly attracting the at...

AI Technical Summary

Problems solved by technology

[0004] The RFID system is generally based on the signal arrival time difference for positioning, and the positioning accuracy is 2-3 meters. Its advantages are non-line-of-sight, small size, and low cost. However, various devices including clocks, amplifiers, and radio frequency circuits are complex. higher

Ultrasonic positioning accuracy is high, but it requires special hardware and is greatly affected by non-line-of-sight and multipath propagation

Ultra-wideband technology has high positioning accuracy, strong penetrating power, and good anti-multipath effect, but the cost is high and theoretical research is insufficient

Using infrared positioning can obtain the highest positioning accuracy of millimeter level, easy to install, but very easy to be interfered by room lights

The average positioning error of Zigbee technology is 3-5 meters, the cost is low, but the distance is short, and a large number of sensors are required to form a network, which is difficult to promote and apply on a large scale

WLAN positioning can be based on signal strength and angle of arrival. The average error is 1-3 meters. The disadvantage is that the resolution of signal strength is limited and it is easily affected by multipath.

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