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A Secure Routing Mechanism for Industrial Wireless Networks Based on SDN

With the integration of industrialization and informatization, there are a large number of embedded industrial wireless physical devices that are susceptible to malicious intrusion by malicious nodes within the industrial wireless networks, which leads to perform unique internal attacks, such as DOS attacks, selfish attacks, Sinkhole attacks and black hole attacks. In order to detect and resist external attacks, the SDN technology is introduced into the existing industrial wireless network and the network equipment is managed by a centralized controller. At the same time, the controller shields the differences between network devices in the network bottom layer. Open control enables network users to define their own network routing and forwarding strategies, making the network more flexible and intelligent. Moreover, SDN controller can make global routing strategy according to the global state of the network and the underutilized resources in the network we introduce SDN paradigm into the industrial wireless network and propose a secure routing mechanism for industrial wireless networks based on SDN. The internal malicious nodes are detected by computing the node comprehensive trust value of node. We design a biologic heuristic algorithm based on the foraging principle of physarum as a network security routing algorithm to calculate the network security transmission path. The performance of packet delivery rate and average end to end delay are compared and analyzed. The result shows that the routing mechanism depicted in the thesis has better performance, and the security of data transmission is greatly improved.