Research On Destruction Resistance Of UAV Ad Hoc Network

In recent years,unmanned aerial vehicle(UAV)technology has rapidly advanced and has become an auxiliary tool to accomplish challenging tasks in both military and civilian fields.However,due to the limited functions of a single UAV,multiple UAVs are required to work together.Clustered UAVs can form the UAV ad hoc network(UANET)to exchange information and complete tasks more smoothly.Nevertheless,due to the high mobility and limited energy of UAVs,UANET are susceptible to attacks or emergencies such as node failures,making it necessary to have good destruction-resistance.This resistance should be considered both internally and externally,including reducing redundant energy consumption through algorithms to enhance the lifespan of UANET and having defense mechanisms to counter external attacks.Thus,the main focus of this research is to design stable and efficient clustering algorithms and routing protocols to improve the antidestruction performance of UANET.The primary work can be summarized as follows:(1)To enhance the internal destruction-resistance of UANET,the Dynamic Transmission Power of Cluster Heads based Clustering(DTPCH-C)scheme is proposed.This scheme aims to improve the reliability and longevity of UANET.Initially,an improved traditional Kmeans clustering algorithm is introduced.Unlike the traditional K-means algorithm,this algorithm optimizes the clustering process by first determining the number of clusters to reduce clustering overhead.Next,a fitness-based selection strategy is employed to select the UAV node with highest fitness value as cluster head and the rest as cluster members,thus improving the reliability of UANET.Besides,a dynamic transmission allocation strategy based on a movement prediction model is designed to adjust the transmission power of cluster heads by predicting the distance between cluster heads and cluster members.This reduces the energy consumption of cluster heads and improves the lifetime of UANET.Ultimately,the anti-destruction performance of UANET is enhanced.(2)To enhance the destruction resistance of UANET both internally and externally,an novel optimized link state routing(OLSR)protocol is proposed.This protocol aims to achieve node load balancing and black hole attack resistance.By optimizing the multipoint relay(MPR)node-set selection algorithm of the traditional OLSR routing protocol,this protocol can address some of the defects of the traditional OLSR routing protocol.Firstly,the MPR set redundancy algorithm is proposed to minimize the MPR set of nodes,reduce the number of forwarding control packets in the network,and lower the routing cost ratio.Secondly,load balancing is carried out on the selected MPR nodes to rationally distribute energy based on the remaining energy of neighboring nodes,which reduces the speed of node death and prolongs the lifetime of UANET.Finally,an anti-black hole attack mechanism is proposed by establishing a node trust table,which reduces the probability of malicious nodes becoming MPR nodes and improves the packet delivery rate in the communication network.By optimizing the above three aspects,the destruction resistance of UANET can be enhanced both internally and externally.