Research On Cooperative Caching And Data Scheduling For RSU In VANET

As an essential part of Intelligent Transportation System,Vehicular Ad Hoc Network is an important extension of Internet of things in transportation.In VANET,Road-Side Units are responsible for assisting vehicle to access the internet and obtain multimedia information.However,due to the limited channel bandwidth and the frequent changes of the net,work topology,it’s hard to respond vehicles’ requests in time.Based on research,it is found that caching popular content in RSU and designing efficient data sheduling can effectively reduce the access delay of users and improve the service efficiency and quality of system.Therefore,the cooperative caching and data sheduling for RSU in VANET are studied in this paper.Firstly,this paper gives a detailed introduction to the caching algorithm in Information Centric Networking.Then combining the local feature of users’ requests with the matching character of cache redundancy and content popularity,this paper proposes a probability caching algorithm with cache-allocation-aware.The simulation results show that the proposed algorithm effectively improves the cache hit ratio and decreases the average reponse hops.Secondly,this paper briefs the SDN architecture and the current research situation of data sheduling in VANET.Then,based on the analysis of factors affecting system service efficiency,this paper proposes a data sheduling algorithm based on SDN architecture.Simulation results indicate that the proposed algorithm effectively improves the service efficiency and quality.