Research On Efficient Data Transmission Mechanism For Information-centric Vehicular Network

With the development of wireless communication technology,mobile communication,and intelligent transportation technology,the Internet of Vehicles has gradually become the most potential new intelligent network.At present,the Transmission Control Protocol(TCP/IP)provides entities with communication services by establishing a "connection" at both ends.However,due to the transient and intermittent connection of the communication link in the vehicle networking,the established connection may be disconnected at any time,which cannot meet the requirements of low latency of the vehicle networking.The characteristics of Information-centric Networking(ICN)based on content name routing and in-network caching are consistent with the requirements of the Internet of Vehicles.However,ICN only supports the request-response communication mode.This mechanism cannot meet the delay requirements for emergency data packets that need to be "pushed"(PUSH)directly to users in the Internet of Vehicles,and a large number of invalid interest requests in the network will occupy a lot of network resources causing network congestion and reduce the performance of data packet transmission.This thesis takes this as a research foothold and conducts ICN data transmission performance research from the two aspects of data forwarding mechanism and reduction of invalid interest packet interference.The main work and innovations of this thesis are as follows:1.Aiming at the deficiency of the traditional ICN "PULL" mechanism in a wireless multi-hop environment,a data push mechanism for emergency message transmission is proposed.The core idea of the mechanism is to use a push-based data forwarding mechanism.When an emergency occurs,the emergency message producer can directly push the emergency message to other vehicle nodes,improving the transmission efficiency of the emergency message.Simulation experiments prove that the emergency message push mechanism proposed in this thesis has lower data transmission delay and can significantly save network communication resources for traditional PULL mode and beacon mechanism.The number of packet transmissions is half of the other two mechanisms.2.In order to reduce invalid interest requests,and then reduce wireless interference and improve packet transmission performance,a vehicle anonymous authentication and message signature mechanism based on identity-based cryptography(IBC)is proposed.In this thesis,a vehicle anonymous authentication and message signature mechanism is proposed,which can judge whether the vehicle node sending Interest packet is a legitimate node.The mechanism reduces access to invalid Interest requests by performing access authentication before the vehicle sends interest packets.It adds its anonymity and signature,indicating its identity when sending interest packages.Finally,simulation experiments show that the mechanism can effectively reduce invalid Interest requests and improve the transmission performance of data packets.In the case of adopting this mechanism,the transmission delay of data packets is minimal,and it has a high satisfaction rate of Interest packets.