Research On Multi-Decision-Based Interest Packet Transmission Method In Vehicle Named Data Networking

With the rapid development of Intelligent Transportation System(ITS),users’ demands for data content such as road information,traffic information(accidents,weather,road congestion,etc.)and other kinds of entertainment information(audio and video streams,etc.)in mobile scenes are also gradually increasing.Vehicle Ad-hoc Networks(VANETs),as an important part of ITS,have also attracted much attention in recent years.In VANETs,the sharing and acquisition of information is address-centric.Before users acquire specific data content,they must first know the specific address where the content is stored.However,due to the mobility of vehicle nodes in VANETs,the network topology continues to change,which also makes it difficult to establish a relatively stable communication link between vehicles.In recent years,the field of Internet research has proposed a new network architecture centered on data content,namely Information-Centric Networking(ICN).The typical feature of ICN is to exchange information based on the data content itself,without caring about the location or address of the data content.Among the currently proposed ICN solutions,Named Data Networking(NDN)has become one of the most feasible and promising specific architectures due to its in-network caching,coupled routing and other characteristics.In recent years,it has received extensive attention from the academic and industrial circles.In view of this,the ITS field has taken the VANETs built on NDN,that is,Vehicle Named Data Networking(VNDN)as the research focus in this field.In VNDN,the traditional forwarding mode of Interest packets is mainly based on flooding and broadcasting.However,due to the characteristics of VANETs,such as high vehicle mobility and rapid topology changes,if the transmission process of Interest packets is not controlled,it will be It consumes a lot of network resources,generates too much redundant data,and causes extra delay,which affects the quality of communication.This paper takes the transmission control of Interest packets in VNDN as the research object,and proposes a multi-decision-based method of Interest packet forwarding.The method first calculates parameters such as the distance between the current vehicle and its adjacent vehicles,relative speed,and the preference similarity of historical request content according to the vehicle’s position,speed,and historical content request behavior and other state information.Then,a decision matrix is established according to the above parameters,and the adjacent vehicles are evaluated by the multi-decision method.Finally,the specific vehicle with the highest evaluation value is selected to forward the Interest package.This method analyzes the communication process of the Interest package in the two different scenarios of the straight road section and the intersection.In order to verify the advantages of the proposed method,this paper compares the performance with other related schemes such as Pa FF,OIFP and flooding.Through simulation experiments,it is concluded that the proposed method has certain advantages in the total number of Interest packets,communication delay,routing hops and packet loss rate in the network.The proposed method can effectively reduce the negative impact caused by the flooding of the Interest package,and can find the producer vehicle with the corresponding data content as quickly as possible.Thereby,the utilization rate of network resources is effectively improved,network redundancy is reduced,and communication quality is improved.