中圖分類號： TN926 文獻(xiàn)標(biāo)識碼： A DOI：10.16157/j.issn.0258-7998.211292 中文引用格式： 李芳，徐光明，劉成，等. 藍(lán)牙連接模式對室內(nèi)定位性能的影響[J].電子技術(shù)應(yīng)用，2021，47(7)：125-129. 英文引用格式： Li Fang，Xu Guangming，Liu Cheng，et al. Influence of BLE connection mode on indoor positioning performance[J]. Application of Electronic Technique，2021，47(7)：125-129.
Influence of BLE connection mode on indoor positioning performance
Li Fang1，Xu Guangming2，Liu Cheng3，Xiang Hengyong4，Shi Huli1，Jiang Juan5，Ning Yongke6，Qian Xiaolong6
1.National Astronomical Observation，Chinese Academy of Sciences，Beijing 100012，China； 2.Taiyuan Satellite Launch Center，Taiyuan 030000，China； 3.Beijing Institute of Tracking and Telecommunication Technology，Beijing 100094，China； 4.Institute of Microelectronics of Chinese Academy of Sciences，Beijing 100029，China； 5.Beijing Institute of Space Science and Technology Information，Beijing 100094，China； 6.School of Information and Communication，Guilin University of Electronic Technology，Guilin 541004，China
Abstract： Fingerprinting location based on received signal strength indication(RSSI) of Bluetooth low energy(BLE) is one of the most popular and effective indoor positioning methods. However, the BLE communication protocol is not specifically designed for location, and the ranging performance of the Bluetooth devices under different communication connection modes varies greatly, which significantly affects the positioning accuracy. In response to this problem, the paper tests and analyzes the BLE RSSI ranging performance under different connection modes. Further, experiments based on a self-built indoor positioning environment are carried out to verify its impact on the user′s actual positioning accuracy. The test results show that when the BLE module is set to "un-connectable mode", the RSSI ranging stability of the device is improved by about 60%, and the user′s online positioning accuracy is improved from 1.40 m to 0.58 m, which significantly improve the positioning performance.
Key words : indoor positioning；Bluetooth low energy(BLE)；received signal strength indication(RSSI)；fingerprinting；weight K-nearest neighbor(WKNN)
0 引言
隨著物聯(lián)網(wǎng)和位置大數(shù)據(jù)時代的來臨，室內(nèi)定位技術(shù)受到廣泛研究和重點(diǎn)關(guān)注，室內(nèi)位置服務(wù)(Location Based Service，LBS)產(chǎn)業(yè)也已迅速規(guī)模化成長。距統(tǒng)計，都市人群80%以上的時間在室內(nèi)環(huán)境中度過。室內(nèi)LBS可為消費(fèi)者提供商場導(dǎo)購、停車場泊車/尋車、防走失、社交交友、展廳/景區(qū)自主導(dǎo)游等服務(wù)，為企業(yè)提供人流監(jiān)控分析、智慧倉儲物流、智能制造、人員資產(chǎn)管理等應(yīng)用，打破線下人與物的邊界，是實(shí)現(xiàn)萬物互聯(lián)的基礎(chǔ)。此外，大量的位置數(shù)據(jù)得以產(chǎn)生和積累，通過數(shù)據(jù)的挖掘和分析，將促進(jìn)行業(yè)效率提升與轉(zhuǎn)型，并帶動新型產(chǎn)業(yè)生成[1-2]。
