Research On Defence Of Dos Attacks In Wsns Based On Multi-path Switch Scheme

Wireless Sensor Networks (WSNs) are a multi-hop network formed by way of wirelesscommunication, and consist of sensor nodes deployed in a certain region. With great wide rangeof applications, WSNs combine the technologies of distributed processing, wirelesscommunications, embedded and so on. Due to working in the unattended environment, WSNsare vulnerable to all kinds of denial of service (DoS) attacks. How to avoid the areas underattack and transmit the data to the destination safely has a crucial importance in reducing thehazards caused by DoS attacks and maintaining the availability of the network.By studying the existing multi-path switiching protocols, this paper classifies these protocolsin network topology, analyzes the multi-path switching performance of these protocols, andcompares their respective advantages and disadvantages. The paper presents a new multi-pathswitching protocol, called DTMPS(Double-Tree Multi-Path Switch) base on the research results.The protocol uses the double-tree network topology. When WSNs are attacked by DoS, sensornodes can switch to a new, reliable transmitting path by choosing the next-hop node indescending(ascending) parent node or ascending child nodes. So the availability of WSNs isguaranteed by avoiding the area attacked.Finally, the paper implements DTMPS protocol in OPNET Modeler Simulation platform, andcompares DTMPS with DM(Disjoint Multi-path) and MTR(Multiple Tree-based Routing) inSwitching performance and energy consumption. The results of the experiment demonstrateDTMPS is a feasible and effective protocol. Conclusion and outlook are made in the end of thepaper as well.