Research On Data Distribution Strategy Of IDNC Vehicular Ad Hoc Network Based On Time Weight

Vehicular Ad-hoc Network(VANET)is the application of traditional mobile ad-hoc network(MANET)in traffic,and it is also a special kind of mobile ad-hoc network.Vehicle network can be divided into two communication methods: V2I(Vehicle to Infrastructures)and V2V(Vehicle to Vehicle).In this paper,IDNC(Instantly Decodable Network Coding)is considered to reduce the transmission delay of V2I and V2V,and the transmission capability of wireless link information is analyzed and studied.The details are as follows.The V2I communication mode based on IDNC is studied.In V2I communication,when the vehicle node communicates with the roadside unit(RSU),a coding method based on time weights is proposed to distribute and process different request messages sent by RSU to the vehicle node.This coding method uses the instant decoding network coding(IDNC)method and the maximum clique algorithm according to the emergency response information of the request.Solve the problem of information transmission.Their combination and use can improve the system response performance.The reliability of wireless link information transmission is discussed.The capability of link information transmission is analyzed,and the transmission performance of the system is measured by gain.A V2V communication mode based on IDNC is proposed.Because in V2V communication,many nodes will request and respond to data packets,and different from V2I communication mode,nodes and nodes may not necessarily be able to communicate with each other.Because each vehicle node has a communication range,only its communication range can request response.Therefore,considering IDNC and this multi-point to multi-point communication mode,a new method is proposed.In order to achieve the best link condition and system performance,a single-hop route selection method based on time-weighted encoding is proposed.Considering the loss of feedback information,the maximum likelihood method is used to analyze the status of data packet reception in order to improve the system gain.