Research On Vehicle Music On Demand System Based On VANET

Ehicular Ad hoc networks is a kind of open mobile Ad hoc network which can provide communication service between vehicles,vehicle and pedestrians,vehicles and Fixed access point,it can provide no centre,self-organizing,multiple jump forward data transmission ability to realize the early warning,auxiliary driving,road traffic information query,communications and Internet access services.Due to the inherent characteristics of VANET network,such as high dynamic topology,strict delay,high speed of node movement,the trajectory prediction,energy can be infinite,accurate positioning,etc.,make it has a clear and broad application prospects.NDN is a new generation of network architecture,which by naming the requested data,and using the name of the data instead of the IP address to communicate.Compared with IP routing protocol,NDN has unique advantages in VANET Because of the characteristics that forwarding packets by name of data in the netword and data packets can be cached in the node.The goal of this project is to design a music on demand system based on NDN mechanism under the network framework of VANET.The operating platform of the system is the android equipment of the bus,Passengers inside the car can open the music on demand system,on-demand their favorite music,acquisition and forwarding of online music is achieved through the NDN mechanism?Each vehicle is treated as a network node,which uses the name of the requested data,obtains the required data from the other nodes through the NDN routing forwarding mechanism,and the hot music files can be cached in the network library.When another vehicle also requests the data,it can be obtained directly from that node.The system architecture is divided into two parts,music playback layer and network layer,music playback layer mainly to achieve the music search,music download and music playback and other functions,and the network layer is mainly provide fast,efficient and stable service for the transmission of music files in VANET environment.In the network layer,for the processing of some large-capacity music such as video and music,the traditional approach is to split the file into several fragments,and then request each fragment,and finally all the file fragments will be stitched,but in the wireless transmission environment,this method Will bring some negative impact,such as load increases,performance degradation,etc.,for this situation,we have improved the existing forwarding algorithm,put forward a kind of algorithm whitch consumers can obtain the complete file by a request.finally the algorithm is simulated by ndnSIM,and some indicators are counted.Experimental results show that the algorithm can save network traffic,reduce network load and improve network performance.