Research On Anti-jamming Routing Algorithm Of ISM Band Multi-channel Wireless Sensor Network

Wireless sensor network technology integrates knowledge of multiple subject,and has become a hot research field by virtue of its advantages on wide application range,small node size,low energy consumption,and the ability to be deployed in complex environments.With the rise of the IOT,wireless sensor network technology has developed more rapidly and deployed more widely.In particular,the deployment of multiple wireless protocol stacks in the ISM band makes the ISM band more and more crowded,and the signal interference problem is very serious.This article starts from the actual background,and aims to study the anti-interference problem of Zigbee on heterogeneous systems in the ISM band and the multi-channel antiinterference problem in the system.The signal power model of Wi-Fi interference is established through the free space loss model,and the Gauss distribution Establish a bit error rate model to study the parameters that affect the strength of the interference.After analyzing the existing channel scanning mode of Zigbee,it is optimized and improved,and the RSSI value is extracted as the basis for interference detection.In the research of channel switching,factors such as interference detection cost,channel switching cost,and anti-interference cost are comprehensively considered,and they are used to calculate the anti-interference routing cost,thereby achieving the purpose of effective anti-interference routing.This paper studies clustered routing protocols and applies them to the unified management of interfered nodes,while using the CSMA-CA algorithm to avoid interference collisions between channels.Finally,this paper builds a Zigbee wireless sensor network simulation platform through opnet,and simulates the proposed multi-channel anti-jamming routing algorithm under different interference source center distances and frequency differences.The results show that the multi-channel antijamming routing algorithm is in the ISM band It has a strong anti-interference ability for Wi-Fi interference in a certain range.Aiming at the problem that the anti-interference algorithm fails to close interference sources,a strategy without threshold is proposed to deal with it.The results show that there are Good feasibility.In general,through the cluster-based multi-channel anti-interference routing algorithm proposed in this paper,the problem of interference between Zigbee and Wi-Fi heterogeneous systems in the ISM band is better solved,and the Zigbee system is eliminated.Inter-channel interference.