WiFi6 Dynamic Channel Optimization Method for Fault Tolerance in Power Communication Network  

作　　者：Hong Zhu Lisha Gao Lei Wei Guangchang Yang Sujie Shao 

机构地区：[1]Nanjing Power Supply Branch,State Grid Jiangsu Electric Power Co.,Nanjing,210000,China [2]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing,100876,China

出　　处：《Computers, Materials & Continua》2023年第6期5501-5519,共19页计算机、材料和连续体（英文）

基　　金：supported by State Grid Jiangsu Electric Power Co.,Ltd.Science and Technology Project“Research on Low-Cost Wireless Coverage and Trusted Access Technologies for Underground Pipe Gallery Digital Network”(J2021081).

摘　　要：As the scale of power networks has expanded,the demand for multi-service transmission has gradually increased.The emergence of WiFi6 has improved the transmission efficiency and resource utilization of wireless networks.However,it still cannot cope with situations such as wireless access point(AP)failure.To solve this problem,this paper combines orthogonal fre-quency division multiple access(OFDMA)technology and dynamic channel optimization technology to design a fault-tolerant WiFi6 dynamic resource optimization method for achieving high quality wireless services in a wirelessly covered network even when an AP fails.First,under the premise of AP layout with strong coverage over the whole area,a faulty AP determination method based on beacon frames(BF)is designed.Then,the maximum signal-to-interference ratio(SINR)is used as the principle to select AP reconnection for the affected users.Finally,this paper designs a dynamic access selection model(DASM)for service frames of power Internet of Things(IoTs)and a schedul-ing access optimization model(SAO-MF)based on multi-frame transmission,which enables access optimization for differentiated services.For the above mechanisms,a heuristic resource allocation algorithm is proposed in SAO-MF.Simulation results show that the method can reduce the delay by 15%and improve the throughput by 55%,ensuring high-quality communication in power wireless networks.

关 键 词：WiFi6 OFDMA fault tolerance dynamic channel optimization cross-slot scheduling access 

分 类 号：TN92[电子电信—通信与信息系统]