Research On DSR Routing Protocol And Its Simulations Based On Ad Hoc Networks

Ad hoc networks is an up-to-date one emerging with the development of wireless communication technology. Many good characteristics of the Ad hoc makes it providing a beneficial basis in public and military communication. As it is indispensable for the Ad hoc network, routing protocol is always the important part in the development of Ad hoc network. Each the existing routing protocol has many kinds of advantages and disadvantages and shows much different performances under different conditions. The dynamic source routing protocol(DSR) is an on-demand protocol, which is based on source route. It has an important function in Ad hoc for its a great deal of advantages, however, it also has many disadvantages. At present, the researches and the improvements on DSR is a pop task of the Ad hoc networks.Firstly, the routing protocols are discussed detailedly, and some important protocols are contrasted, some related and worthy conclusions are giving; DSR protocol is introduced in detail and a comparison between DSR, AODV and TORA protocol is made later in grouping delivering rate, grouping delivering delay and throughput, the advantage and disadvantage of DSR are also analyzed. Then we propose a new algorithm-the SMSR(Shortest Multiple Source Routing) algorithm based on DSR with the concept of the multiple routing. In the new algorithm, three routes will be chosen in the end, and only the destination nodes can respond to the routing request (RREP), the intermediate hosts rebroadcast the shortest RREQ packets with some conditions. The reliability and the stability of the route can be improved, and the delay of the network can be reduced in the new algorithm as it compares with the DSR.Finally, The DSR and the SMSR are analyzed and compared with each other under OPNET. The simulation results show that SMSR is feasible and some performances, like delay, throughput and etc., of it are better than the DSR protocol. We can say, the SMSR algorithm is a feasible and reliable routing algorithm. In a word, this paper is not merely of considerable referential importance in researching into the optimization of the DSR protocol, and also has significant to the study of multiple routing protocol in Ad hoc networks.