Research On Data Forwarding Incentive Mechanism In Software Defined Vehicular Networks

As an extension of the Internet of things in the field of transportation,Vehicular Ad-hoc Networks(VANETs)plays a key role in improving traffic safety,promoting the development of automatic driving and improving the user's travel experience.Many studies consider the transmission of information between vehicular nodes is unconditional forwarding,but in reality,because the energy consumption and other reasons of vehicular nodes,the node may choose to discard data packet forwarding and cause communication failure,showing node selfishness.The main two kinds of incentive mechanism of selfish nodes forwarding data based on the credibility and pricing,in most studies in a fair assumption of fixed infrastructure control mechanism for the implementation of the third party,but this is not the actual network.In order to solve the above problems,this paper studies the incentive mechanism of different nodes in the vehicular communication.Taking into account the advantages of centralized control and unified management of software defined network(SDN),this paper introduces the software defined network on the basis of the VANETs,and studies the data forwarding incentive mechanism in the network.In this framework,the central controller obtain relevant information required for the incentive mechanism design of the vehicle from the node,and through the flow table generation and issue,to complete the routing control,reward and punishment,so as to ensure the implementation of equity incentive mechanism.Then,in this framework,this study carried out a double incentive mechanism based on game theory,strict punishment for refusing to credit data forwarding selfish nodes on data forwarding node price incentives at the same time.Different from the ad hoc network vehicular communication,the central controller of software defined vehicular networks can collect topology information,the range ability and the reputation value of vehicle nodes.According to the information,combining the importance of nodes to increase or decrease the reward and punishment,in order to promote an important node in the network to active participation of data forwarding in paper.Finally,through the simulation platform of the network,the design of the mechanism in the case of the number of different vehicles were simulated and analyzed.The simulation results show that,in this architecture,the network can guarantee the fairness of the implementation of the mechanism,nodes choose cooperation faster and forwarding rate is higher ultimately in multi node network that network connectivity is better.Compared with the original incentive mechanism based on the game theory,the incentive mechanism can encourage more selfish nodes choose cooperation after a same period of time.