Research And Implementation Of Indoor Positioning System Based On IBeacon Technology

GPS, the Global positioning system has been applied widely in personal positioning, vehicle navigation, aviation and maritime search and rescue scene, but the satellite signals cannot penetrate buildings, GPS can not work. Therefore, we need fit appropriate technology such as Infrared, Ultrasonic, RFID, WiFi, Bluetooth and so on in the indoor scenes. The old version of the Bluetooth consumes more power, covers a small range, disturbs easily, not suitable for indoor positioning technology. However, Bluetooth 4.0 became low power consumption, wide coverage, high transmission speed, suitable for indoor positioning technology. IBeacon is a Bluetooth signal base station based on Bluetooth Smart Technology issued by the Apple Corp. Indoor location system based on ibeacon refers to the mobile terminal receives the Bluetooth signal transmitting a plurality of ibeacon. Through the received information to calculate the location of the mobile terminal, to achieve high positioning accuracy of indoor positioning technology.The previous research studies in indoor positioning as the theoretical basis, with the smart Bluetooth low power, high speed, anti-interference for the precondition, summarizes the difference of algorithms, to make the following improvements for the classic indoor location algorithm: first, when we establish the fingerprint database, we can use some outlier detection algorithms, filters the fingerprint to ensure the accuracy of fingerprint data; second, in fingerprint and real-time positioning stage using different filter algorithm processing the received fingerprint information, which can assure accuracy of fingerprint establishment phase, also ensure real-time positioning stage to the requirement of real-time; third, in real-time positioning stage, according to the pre storage area average fingerprint information to determine area, according to different regions of the candidate give different weights, find M points that has small weighted distance from all areas to study, calculate the average position. On the project implementation, with NoSQL to replace the commonly used SQL to solve the problem of data access efficiency; according to the particularity of the indoor scene improved A * algorithm to make it meet the demand of indoor navigation.This study main work is to improve fingerprint localization algorithm based on iBeacon, at the same time, on the basis of the improved A* algorithm to realize the indoor navigation, implements a set of indoor positioning system contains based on Node.JS high-performance cloud services, based on AngularJS deployment management background, based on indoor location of the Android APP. This research topic is developed based on iBeacon technology of low power consumption, high precision, high performance of indoor location services solutions.