Research Of DSR Based On QoS Optimization And Respond To DoS Attacks

Abstract:Ad Hoc network is a very special wireless ad hoc network without fixed infrastructure, network nodes are both former hosts, and routers for some special occasions, the relevant technology is currently a hot research direction of the wireless network. As people raise demands for multimedia services on the Ad Hoc network security services to provide QoS requirements are also increasing. However, due to the Ad Hoc networks with traditional cellular communication networks, WLAN and other fundamental differences, so this poses challenges for the study to improve the performance of Ad Hoc network. The object of this paper is Ad Hoc Networks DSR routing protocol on how to improve its QoS conducted in depth research.In this paper, the DSR routing protocol, refer to the extensive literature on the basis of research results, for the shortcomings of DSR protocol related improvements made, the goal is to enhance the QoS routing protocol performance. This paper analyzes the operation of DSR protocol and pointed out the route reply phase prone to routing response conflict, for this defect presents a DSR-BCA routing algorithm, modified the routing node request packets, the routing node reply packets, the routing node error packets, and improve the operation of the agreement in the network. Another paper analyzes the Ad Hoc network defects when subjected to DoS attacks, based on DSR-BCA protocol adds a mechanism to deal with DoS attacks which is named DSR-BCA-RD. Effectiveness let participate node routing links are involved in the implementation of routing authentication algorithm, network data transmission when the packet loss rate exceeds a preset threshold, the algorithm used to identify nodes are isolated DoS attack and isolate it, so that network nodes maximized.Finally, NS2simulation platform experimentally verified and analyzed. The results show that the optimization based on the original DSR play a good effect on the routing algorithm performance has been improved to varying degrees, for enhancing the performance of DSR protocol QoS played a certain role. Number of figures, tables, references are19,8,77.