适应矿井线形空间的BLE多连接网络移动节点漫游通信方法  

Mobile Node Roaming Communication Method for BLE Multi-connection Network Adapting to Linear Space in Mines

作　　者：卓敏敏 赵立厂 ZHUO Minmin;ZHAO Lichang(Tiandi(Changzhou)Automation Co.,Ltd.,Changzhou 213015,China)

机构地区：[1]天地(常州)自动化股份有限公司,江苏常州213015

出　　处：《煤矿机电》2023年第6期10-14,共5页Colliery Mechanical & Electrical Technology

基　　金：天地科技创新创业资金重点专项(2019-TD-ZD007)。

摘　　要：低功耗蓝牙(BLE,Bluetooth low energy)是一种智能手机中标配的无线通信技术。在矿井巷道线形受限场景中,空间作业人员、行走作业的机械设备等移动节点需要接入无线通信网络,并保持与网络的连接以及感知数据的交互,为此提出了一种移动节点在线形BLE多连接网络中的漫游通信方法,通过BLE移动终端持续监测和评估BLE基站的RSSI(Received signal strength index),采用去极值平均滤波算法,对RSSI值进行滤波,择优建立用于传输数据的主要通信链路和保持连接的次要通信链路,移动过程中通过主次通信链路切换以及重建次要通信链路以保证数据传输通道的稳定性,通过BLE基站持续广播更新数据传输路径以保证移动通信路径的准确性。试验结果表明,该方法可实现移动终端自主择优切换与基站的连接,保持传输链路稳定,具有良好的鲁棒性。Bluetooth low energy(BLE)is a wireless communication technology standard in smartphones.In the linear restricted space of mine tunnels,mobile nodes such as space workers and walking machinery need to be connected to wireless communication networks and maintain connectivity with the network and interact with perception data.For this reason,a roaming communication method for mobile nodes in a linear BLE multi-connection network was proposed.This method continuously monitors and evaluates RSSI(Received signal strength index)values of the BLE base stations through the BLE mobile terminal,and adopts the average filtering algorithm which removes extreme values to filter the signal quality,and select the primary communication link for data transmission and the secondary communication link for maintaining connectivity.During the mobile process,the stability of the data transmission channel was ensured by switching between primary and secondary communication links and rebuilding secondary communication links,and the BLE base station continuously broadcasts and updates the data transmission path to ensure the accuracy of the mobile communication path.The experimental results indicated that mobile terminals could autonomously switch connections with base stations to maintain stable transmission links,and had better robustness.

关 键 词：线形受限空间 低功耗蓝牙 漫游通信 漫游链路 RSSI 

分 类 号：TD65[矿业工程—矿山机电]