Design And Implementation Of Vehicle Sevice System Based On NDN

As a future content centric architecture,NDN network has inherent advantages for mobile environment,which improves the efficiency of data acquisition and network performance.Aiming at the problems of connection interruption,communication failure,incompatibility of single forwarding strategy caused by the diversity of users and data types and multiple retransmission and network redundancy caused by flooding forwarding,the architecture,naming mechanism,structure of interest packet and data packet,caching mechanism,forwarding process,differentiated service model and scheduling algorithm of NDN network are studied Multi attribute decision making and vehicle service system.The main research contents and innovations are as follows:(1)According to the specific scenario of vehicle service system,the NDN naming,interest packet and data packet are redesigned to ensure the efficiency of vehicle data forwarding under the Internet of vehicles.Aiming at the problem that different types and contents of data adopt FIFO fixed order,this paper proposes a differentiated scheduling algorithm,which can realize the classification of data and realize the reasonable arrangement of data forwarding order according to the priority.Aiming at the problem of network topology rapid change and connection interruption caused by vehicle speed,this paper proposes a multi-attribute decision algorithm,which adds the influence of speed on the basis of probability forwarding,and realizes the reasonable selection of forwarding port,so as to realize the optimal forwarding.(2)Combined with the above algorithm,a multi-attribute decision forwarding strategy based on NDN is proposed.In order to analyze the performance of this forwarding strategy,OpenStreetMap and Sumo software are used to build a real road environment and vehicle trajectory,and NDN communication is simulated on the ndnsim simulation platform.Experimental results show that compared with the intelligent flooding forwarding strategy,the proposed strategy can improve the satisfaction rate of interest packets by 8.9% and reduce the average delay by 25ms;compared with the BREB forwarding strategy,the proposed strategy can improve the satisfaction rate of interest packets by 5.1% and reduce the average delay by 14.6ms.Using the differentiated scheduling multi-attribute decision forwarding strategy can better adapt to the changes of vehicle topology,reasonably configure the request content,and effectively reduce the number of service interruptions.(3)Based on the forwarding strategy,a vehicle service system is designed and implemented.The system realizes the modules of login,user management,information warning,vehicle rescue and parking management,realizes the integration of vehicle services,meets the daily needs of users,and provides users with good driving experience.