Research On Secure And Energy-efficient Routing Based On Location In MANET

With the development of global positioning system,geographic routing technology is widely used in wireless ad hoc networks.Greedy Perimeter Stateless Routing(GPSR)is a strategy which uses node information as the main part and topology information as the secondary part.It does not need to establish and maintain routing tables.However,considering the multi-hop characteristics of wireless communication and the gradual expansion of network nodes to unmanned aerial vehicles(UAVs),routing strategy based on location faces great challenges in terms of security and energy consumption.This thesis focuses on the analysis of the security and energy-efficient routing strategy of mobile ad hoc network based on geographic location.This thesis carried out research in three scenarios:vehicle ad hoc networks(VANETs),UAV ad hoc networks,and ad hoc networks composed of vehicles and UAVs.The work of this thesis is as follows:(1)A secure routing strategy based on trust model is proposed to study the communication security of vehicles in three-dimensional highway scene in VANETs.In order to improve the security of routing,this thesis establishes a trust model based on multi-dimensional factors such as forwarding rate,interaction degree,and node activity.Then,in order to alleviate the influence of transmission loss caused by obstacles on the routing process,a relay node selection scheme based on location is designed.The node’s moving direction and link survival time are introduced to improve the efficiency of communication.Finally,by compared with the GPSR protocol,the packet loss rate is reduced,and the throughput is increased.(2)An energy-efficient routing strategy based on energy model is proposed to study energy consumption problem for UAV ad hoc networks.In order to reduce the average energy,this thesis establishes an model based on multi-dimensional information such as node speed,transmission data volume and transmission distance.In order to improve the efficiency of routing process,deviation degree to the axis of transmission node pointing to destination node is introduced.Finally,the influence of mobility and node number on network performance is analyzed.Compared with the GPSR protocol,the data packet delivery rate is increased,and the average energy consumption is reduced.(3)A trusted and low-power routing strategy based on node type and node speed is proposed for ad hoc networks composed of vehicles and UAVs.This thesis is dedicated to improve the accuracy of malicious attack detection,and effectively balance the energy of nodes.This thesis further improves the trust reasoning model and energy model.Then,in order to improve network security and energy efficiency,routing strategies based on node type and node mobility are designed respectively.In the routing scheme,the trust value and the remaining energy value are combined to select the best next hop forwarding node.Finally it is proved that compared with the GPSR protocol,the survival time is prolonged and the end-to-end delay is reduced.