Ad Hoc Network Anti-jamming Routing Repair Technology Research

Mobile Ad hoc network, is a special kind of wireless mobile network, networknodes in all equal status, no center control node, without any network fixedinfrastructure support. Due to the Ad Hoc network above characteristic, make its can beused in many fields, especially in the military area most outstanding research. Becauseof its need not assume the infrastructure, the network quickly and has very strongresistance to devastating, making Ad Hoc networks can be very good adapt to thechanging battlefield environment. Because wireless channel bandwidth limitedresources, node mobility strong, independent safety weaker, energy limited, that AdHoc network technology research faces many challenges. Especially in the militarytactical communications networks, how to improve anti-interference ability andself-healing capacity of the network, is currently a hot issue in network research.This thesis first to analyze the interference model in Ad Hoc network, and analyzesthe link interference model in without outside interference sources, have externalinterference sources, broadband external interference source, and give three of themathematical model. Finally the simulation analysis the Okumura path loss modelinterference of, it can be seen that the model can to a certain extent by choosing theproper frequency to improve the node receiving data signal-to-noise. So we can throughto improve signal-to-noise ratio method, and improve the performance of the routingprotocol. In this paper, based on the AODV, proposes a new link anti-interferencerouting protocol: LAI-AODV(Link Anti-interference AODV). In this study, thesignal-to-interference plus noise ratio (SINR) measured at the physical layer is thkeninto consideration. And then AODV agreement to the local repair technology wasanalyzed, the search for how to break the chain link quickly and effectively repairmethods, to reduce data message lost package rate of purpose. This thesis put forwardbased on AODV agreement LAI-AODV (Link anti-interference AODV) routing repairthe improved algorithm. In this algorithm, in order to avoid the actual definitionneighbor link is not stable area, combining two jump backup routing, to local repair wasimproved, and increases the data message rescue mechanism, make agreement to further improve the performance.LAI-AODV protocol based on the local repair in AODV, the adjacent node designbased on the actual unstable areas from backup routing repair algorithm. The brokenchains upstream and downstream stability evaluation, through to the upstream anddownstream neighbors around traffic to evaluate the stability calculation, decided to itsparticipation in the routing repair process, to avoid the second repair, and lost packageproblem. Through the two jump routing backup, launched the node can understand tworepair jump within the scope of the network topology structure, in the link happen whenbreakers, found open circuit nodes can be based on adjacent node information in timethis node to find the next two jump node of the backup routing in the shortest timerepair interrupted the routing; In the paper, backup routing information through thenodes between adjacent to the radio news HELLO to establish and maintain, at noadditional cost message, ensure the backup routing real-time and effectiveness andmaking routing repair the probability of success for promotion. Finally, this thesisAODV agreement in the basis of the data message rescue mechanism improvement,reduce data message of lost package rate, reduce the network overhead.The LAI-AODV protocol proposed in the paper is simulated on the OPNETsimulation software. Compared with the the AODV protocol, theresult of the simulationindicates that LAI-AODV protocol can reduce the end-to-end delay, effective control ofthe message overhead and reduce the routing overhead.