Research And Design For Routing Protocol Of High-Dynamic Ad-Hoc Networks

With the development of the technology of communication and aerospace,the high-dynamic self-organized networks based on Airborne Communication Networks are widely used in military,civil and public fields.Comparing with the traditional Mobile Ad-Hoc Networks,the nodes in the high-dynamic ad-hoc networks have higher moving speed,more complex link environment,and wider motion boundary and transmission distance.These characteristics make high-dynamic ad-hoc networks different from normal Mobile Ad-Hoc Networks(MANETs).What’s more,the design of routing protocols has become the research hotspot among institutions and scholars owing to the characteristics of high-dynamic ad-hoc networks.The main research content of this paper is the routing protocol of high dynamic ad-hoc networks.Firstly,by analyzing the structure and characteristics of high dynamic ad-hoc networks,the difficulties and key points of its routing design are analyzed,and the routing algorithm suitable for high dynamic scene is designed according to the characteristics.The main work of this paper includes:1.A calculation model of link stability between nodes is designed.In this paper,the link stability between nodes is modeled,and the link stability is analyzed and compared quantitatively which provides calculation support for routing strategy.According to the distance,the value and direction of relative speed,the node communication distance and the other elements,as well as the influence of acceleration on change of speed,the model accurately deduces the calculation expression of link maintenance time between nodes.We also analyze the influences of the various factors on link maintenance time.2.A high dynamic routing strategy algorithm based on stability is designed.In order to solve the problem of the rapid change of the network topology caused by the movement of high dynamic nodes,this paper adds the link stability into the judgment condition based on OLSR,a proactive state routing,and proposes an improved state route,the Acceleration Concerned Link State Routing.The simulation results show that the performance of the proposed routing strategy algorithm is better than other self-organized networks routing protocols in high-dynamic scenarios,which verifies the adaptability of the high-dynamic networks.3.A routing repair algorithm based on geographic routing is designed.In this paper,Greedy Geographic Acceleration-Concerned Link State Routing is proposed to solve the problem of the abrupt degradation of the link quality in high dynamic scenarios.Acting as the backup routing,the greedy forwarding idea in geographic routing is introduced,and the "store-carry-forward" model is introduced as well to improve the packet delivery rate in the poor link quality environment.The simulation results show that the performance of G-ALSR is better than that of ALSR in the poor link quality environment,which verifies its repair performance.