IoV Oriented Distributed Dynamic Deployment Of UAVs And Routing Protocol Design

Huge market of self-driving cars has attracted a lot of technology companies and automobile manufacturers in racing on the track,the car network combined with automatic transmission and intelligent made car element is the core of the intelligent transportation system.Flight control system with mature technology and flexible movement ways make the unmanned aerial vehicle(UAV)communication system under the attention of the scholars,some scholars try to introduce the UAV heterogeneous traffic network architecture,which leverages UAV to assist vehicular communications.This paper mainly studies how to use the distributed dynamic deployment of UAV to aid between vehicle routing.Firstly,this paper introduces the car networking related background and the direction of the UAV deployment research present situation,proposed the distributed deployment more drones extend roadside unit to assist V2R communication system model,according to this model,gives the vehicle number to cover for the formal representation of the obj ective function of optimization problem and designed a sector based on the distributed dynamic deployment strategy,this strategy makes the UAV periodically according to their perception of the real-time local information to adjust its deployment location.When three UAVs are deployed,the proposed strategy can cover more than 5-25%vehicles compared with the virtual force field based motion control algorithm.Secondly,based on the existing ad hoc on-demand multipath distance vector(AOMDV)routing protocol,this article designs preemptive ad hoc on-demand multipath drone aided routing(PAOMDA)protocol,which makes improvement in three aspects.First,optimized local repair steps of PAOMDA ensure that multiple paths from source node to destination node still keeps node disjointness in routing maintenance phase,which enables multipath adaptive load balancing;Secondly,preemptive local repair mechanism of PAOMDA reduces the probability of losing connection due to the broken link,decreasing packet delay borrowed by the routing discovery process after link becomes broken;Thirdly,dynamic path shortening strategy of PAOMDA is able to select the right time to reduce the number of hops,improving data transmission efficiency.The simulation experimental results show:comparing PAOMDA with AOMDV,when traffic density is 840vph,road speed limit is 60km/h,packet send rate is 50pkt/s,it can increase at most twenty percent higher communication completion ratio;when traffic density is 720vph,road speed limit is 60km/h,packet send rate is 25pkt/s,it decrease at most forty percent lower control message overhead.