Indoor positioning system and method based on RSSI

Abstract

The invention discloses an indoor positioning system and an indoor positioning method based on RSSI. The system comprises a terminal module, a to-be-tested node module, and a plurality of anchor node modules. The to-be-tested node module is arranged at a node to be tested, the to-be-tested node module comprises a to-be-tested node microprocessor and a Bluetooth slave unit connected therewith and a to-be-tested node power supply unit; the anchor node module comprises an anchor node microprocessor and a Bluetooth host unit connected therewith, an anchor node wireless communication unit and an anchor node power supply unit; the terminal module comprises a PC machine, a terminal wireless communication unit connected therewith, an input unit and a terminal power supply unit. The to-be-tested node module sends a broadcast packet to each anchor node module, the anchor node module analyzes the broadcast packet to acquire RSSI data, the RSSI data is sent to the terminal module after being filtered, and the terminal module determines the position of the node to be tested according to the RSSI data. According to the system and the method provided by the invention, the difficulties that the prior art is large in RSSI acquisition error, large in indoor positioning error and high in positioning cost.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and relates to a wireless indoor positioning system, in particular to an RSSI-based indoor positioning system. Background technique [0002] Using wireless signals to locate has very important applications. For example, in the military, sensor networks can be used to detect the action routes of enemy troops; in civilian use, positioning information can be used to detect the flow of people in shopping malls. With the development of mobile communication and wireless sensor network technology, people pay more and more attention to location-based services in indoor environment, and indoor occupant positioning has become a very active research field. [0003] To achieve positioning, the distance between the mobile terminal and the base station must be calculated first. In the ranging-based positioning method, there are roughly four commonly used technologies for measuring the distance bet...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide an RSSI-based indoor positioning system and method, which overcomes the problems of large RSSI acquisition error, large indoor positioning error, and high positioning cost in the prior art.

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