Research On Routing Algorithm For Unmanned Aerial Vehicle Ad Hoc Network

Currently, UAV applications have gradually penetrated from the military field to multiple areas of civilian, such as disaster monitoring, geological surveying, traffic control, communication relay and emergency communications. The applications have achieved good results in these areas. With the continuous expansion of UAV applications, many tasks require coordination of multiple UAVs, so the trend of networking and formation have been showed in the development of UAVs. UAV mobile ad-hoc network has been the concern of a number of related research institutions and armed forces of some countries. There are some key technologies, which were particularly widespread attention to these departments. The routing technology of UAV network is one of them.If the classic routing protocol of the MANET directly applied to UAV MANET, there will result in lower packet delivery ratio, lager end-to-end delay, lack of network security and many other issues, which affect the UAV MANET communication performance. In the paper, two problems of the routing algorithm for UAV ad-hoc network were studied.(1) There are features of high mobility and load non-balancing in the UAV ad-hoc networks. Mobility-aware algorithm and load-aware algorithm were introduced into the routing algorithm, and multiple shortest path algorithm is improved. Ultimately, a mobility and load aware multipath OLSR algorithm(MLM-OLSR, Mobility and Load aware Multipath-OLSR) is proposed. Simulation results verify the superiority of the proposed routing algorithm.(2) UAV ad-hoc networks generally present in the complex network security environment, the networks are extremely vulnerable by malicious attacks, and these attacks have serious threat on the UAV ad hoc network survival and the implementation of tasks. Therefore, it is necessary to study the issue of network security. Wormhole attack is a common network attack with extremely subtle and great threat. Through the study of wormhole attack, on the basis of MLM-OLSR routing algorithm, a security-aware MLM-OLSR routing algorithm(Secure aware MLM-OLSR, SMLM-OLSR) is proposed. The routing algorithm has the ability to avoid wormhole attack.In this paper, the two routing algorithms were carried out modeling and simulation in QualNet simulator. The simulation results show that the proposed two new routing algorithms achieved the desired design goals. MLM-OLSR routing algorithm with respect to the classical OLSR routing algorithm has higher packet delivery ratio and lower end to end delay, SMLM-OLSR routing algorithm has better defense capability wormhole attack than the MLM-OLSR. The routing algorithms can be applied to the UAV mobile ad-hoc networks, and these have certain reference value for research on routing algorithms of other mobile ad-hoc networks.