Cooperative Content Dissemination Scheme And Incentive Mechanism Researches For Intelligent Connective Vehicle

With the rapid development of wireless communication and digital intelligent vehicle tech-nologies,vehicles will step toward connection and intelligence,Intelligent Connected Vehi-cle(ICVs),in the foreseeable future.Intelligent connected vehicles embedded with enhanced sensors and smart control systems can realize Vehicle-to-Everything(V2X)connections ac-cording to Vehicle-to-Vehicle(V2V),Vehicle-to-Infrastructure(V2I),Vehicle-to-Pedestrian(V2P),and Vehicle-to-Network(V2N)communications.As one of the important services of ICVs,content dissemination enables vehicles to obtain much more data than they can obtain by themselves and provides support for large-scale,accurate,and real-time vehicular applications,such as environment perception,traffic scheduling,and driving entertainment.Therefore,it is of great significance to research the content dissemination technologies on the Internet of Vehicles(Io Vs)to promote the development of ICVs.The conflict between increasing massive vehicular data and limited wireless network capacity makes the data dis-semination researchers gradually focus on involving cooperative content dissemination in-stead of just relying on infrastructure dissemination to improve the dissemination scale and efficiency.However,the high-dynamical topology,unstable wireless environment,diversity of dissemination content,and the selfishness of vehicle nodes make the cooperative content dissemination face many challenges: how to coordinate content dissemination connection among vehicles in high-dynamical and unreliable Io Vs to avoid conflicts,reduce interfer-ence and improve the content dissemination efficiency? how to jointly optimize the content transmission connections of base stations and vehicles in the distributed Io Vs to improve the content dissemination efficiency with a variety of dissemination requirements? how to make rational and selfish vehicle nodes participate in the cooperations of content dissemination,and so on.Addressing the above problems,in this dissertation,we start from the single type of content of basic V2 X applications ——popular content,and study a vehicular cooperative popu-lar content dissemination by coalition game theory and dynamic blocking mechanism? with the diversification of content types,we focus on the hybrid content dissemination for the enhanced V2X(e V2X)applications,and study a cooperative hybrid content dissemination mechanism by a regional centralized architecture? to realize a decentralized trustless incen-tive mechanism for vehicular cooperative content dissemination,we study a decentralized cooperative dissemination management scheme and incentive mechanism.The contribu-tions of our works can be summarized as follows:1.We propose a cooperative popular content dissemination scheme basing on a coali-tional game theory and dynamic location-based blocking mechanism to realize ef-ficient Point-to-Point(P2P)popular content sharing.We apply the coalition graph game to model the sharing actions among vehicles and design a unique utility function that fully considers the content requirement,node locations,link duration,and mutual interference to evaluate the connections between vehicles,to realize the efficient co-operation among vehicles.Moreover,a dynamic location-based blocking mechanism is introduced into our scheme.The blocking scheme further reduces the algorithm complexity and increases applicability by splitting a huge coalition into several small coalitions.The numerical results show that our proposed scheme could outperform the three schemes in terms of content delivery ratio and average dissemination speed.2.We propose a Regional-Centralized Cooperative Hybrid Content Dissemination scheme for enhanced V2X(e V2X)applications to provides efficient high-precision content dissemination services with a variety of Quality of Experiences(Qo E).A regional-centralized optimization architecture can realize,mm Wave base station(BS)central-ized,regional optimization on dissemination connections of BSs and vehicles.And by analyzing the features of dissemination requests from e V2 X applications,the con-tent dissemination requests are divided into elastic and inelastic requests.We design a jointly optimized model for content dissemination to balance the different Qo E re-quirements of them under the limited wireless resource.The numerical results show that our scheme can significantly decrease the waiting time of elastic requests and the failure ratio of inelastic requests.Furthermore,it can provide high-precision con-tent dissemination services with better Qo E and wider coverage compared with other schemes.3.Addressing the demand for a decentralized trustless incentive mechanism,we pro-posed a decentralized cooperative dissemination management scheme and incentive mechanism in Io Vs,to realize a trusted incentive without a third platform and en-courage cooperative dissemination appropriately.We utilize Directed Acyclic Graph(DAG)-based blockchain and dynamic traffic injection mechanism to establish a de-centralized management scheme,which can significantly decrease computation com-plexity and provide stable cooperation management performance.Besides,the con-tract theory is introduced to design a series of incentive contracts for vehicles with different dissemination abilities to realizes multilevel incentives.Our scheme can sig-nificantly improve content dissemination's efficiency and total profits compared to the other two bench works.