Design And Implementation Of Dynamic Access Mechanism For Wireless Mesh Network Based On WiFi6

Wireless Mesh network is a kind of multi-hop network.Different from traditional wireless network,it combines the advantages of WLAN and Ad-hoc network,and has the advantages of easy organization,high speed and self-healing.In practice,wireless Mesh network has been widely used in emergency communication,wireless campus network,industrial Internet of things and so on.WiFi6 is a wireless LAN technology created by the IEEE802.11 standard by the Wi-Fi Alliance.It greatly improves the wireless rate and unlimited resource utilization,reduces the transmission delay,and improves the network stability under the dense signal.These improvements fit well with the wireless Mesh network and can effectively improve the communication quality and speed between nodes.Due to the characteristics of high load,unbalanced service and high service outburst in the wireless Mesh network,the direct application of the traditional access algorithm of wireless AD hoc network in the WiFI6-based wireless Mesh network may lead to the deterioration of network performance,including high packet loss rate,throughput shortage,and unguaranteed end-to-end delay.In order to solve these problems,this paper studies the dynamic access mechanism of wireless Mesh network based on WiFi6,designs an optimization scheme,and completes the software and hardware development and related function testing through Open Wrt system.The detailed work completed in this paper is as follows:(1)The network architecture of wireless Mesh network and the protocol standard of WiFi6 are analyzed in detail,and the communication between nodes of wireless Mesh network based on WiFi6 is greatly affected by the interference of AP points in wireless environment,as well as the interference between wireless channels of WiFi6.An adaptive channel selection algorithm for wireless Mesh networks based on interference coordination is proposed.The actual test results show that the proposed algorithm adds a network controller into the traditional Mesh network,perceives the interference of channels at different nodes in real time and selects the channel with less interference adaptively,thus significantly improving the overall performance of the network.(2)A new dynamic access scheme for wireless Mesh network based on WiFi6 is proposed to solve the problems of declining communication quality and low utilization rate of wireless resources caused by unreasonable access modes of Mesh nodes,as well as the problems of declining performance of wireless Mesh network caused by large interference in wireless environment.The wireless Mesh network data collected in real time was input into the model trained with Time GAN in advance,and the throughput delay data corresponding to various access strategies in the current wireless environment was generated.Then,the optimal access strategies of different Mesh nodes were obtained through the Multi-armed Bandit.Experimental results show that the algorithm can improve the communication quality and utilization rate of wireless resources effectively.(3)The software and hardware development of the wireless Mesh network system is completed,and the dynamic access mechanism of the wireless Mesh network based on WiFi6 is implemented and tested.The test results show that the access mechanism studied in this paper conforms to the characteristics of WiFI6-based wireless Mesh network,can make more effective use of network resources,improve the communication quality of wireless Mesh backbone network,and achieve the expected design objectives.