Research On WSN Congestion Control Algorithm For Air Cargo Information Transmission

In recent years,the volume of air cargo has been increasing year by year.The traditional methods of manually handling the cargo information of the airport cargo depot have been unable to meet the increasing demand.The wireless sensor network information acquisition and transmission technology has been more mature,very suitable for airport cargo terminal information collection.However,the problem of node congestion has a great influence on the stability and reliability of the information collection network.Therefore,it is very important to study how to solve the congestion problem in wireless sensor networks.Firstly,this paper analyzes and constructs the congestion control model of wireless sensor networks,and points out the overall structure of the congestion control model.It uses the idea of sliding window to limit the size of the cargo information transmission packet;when the congestion occurs,priority is given to the priority according to the cargo information characteristics of the airport;and design a congestion prediction mechanism based on active dynamic prediction so that congestion can be predicted in time.Secondly,in order to alleviate the congestion problem,a WSN congestion scheduling method is proposed for cargo information gathering at airport cargo terminals.The idea is to avoid congestion in the process of information collection and transmission through relevant strategies.If congestion is detected,orthogonal projection is adopted.In the node selection model of multi-attribute decision making,a suitable node on the newly created path is selected,a bypass path is constructed,and flow splitting is performed together with the original path until the system congestion is relieved or released.Because of the aforementioned congestion control algorithm does not consider the energy factor,and energy consumption has a greater impact on the stability of the wireless sensor network,an optimized adaptive congestion mitigation algorithm is proposed.According to the neighbor node information table of the congested node,the node whose congestion level and remaining energy meet the standard is selected,and so on,until a new path is finally established,and transmit the traffic together with the original path.If no suitable node is selected,in order to avoid the increase of congestion and waste too much energy,the algorithm adopts a cascaded feedback mechanism of congested nodes,in order to limit the rate of the source node.Finally,in order to verify the effect of the above two strategies on the congestion mitigation of wireless sensor networks from different perspectives,the relevant simulation experiments are conducted.The relevant experimental results show that the proposed algorithm not only alleviates the system congestion problem,but also reduces the system energy loss.