Research On Non-cooperative Game Of Communication Quality And Privacy Based On Incomplete Information

With the continuous development of China’s urbanization process,urban traffic problems have increasingly aroused people’s attention.The current problems in China’s traffic environment include: the number of non-motor vehicles including bicycles on urban streets is large,and the urban layout is not compatible with the current traffic environment.These problems not only cause frequent traffic accidents in urban road sections,but also bring inconvenience to urban residents.For solving the problems above,People began to use Internet of Vehicles technology extensively.the Internet of Vehicles technology has a vast prospect and has been regarded as an inevitable trend of future transportation development,but it is not perfect despite of the huge potential.It is still necessary to build a more complete intelligent transportation network system to protect the communication privacy of vehicles in the open network environment of the on-board ad-hoc network now.This thesis studies the location privacy security of vehicles in the vehicle ad-hoc network.Aiming at the characteristics of the vehicle ad-hoc network,such as strong openness,frequent topology changes,and high requirements for real-time communication,the author proposes a dynamic anonymous update strategy based on game theory combined with communication quality.This strategy controls the revenue threshold of the vehicle’s pseudonym change based on the quality of communication in the hybrid zone of the vehicle ad-hoc network,effectively guaranteeing the vehicle position and communication privacy in the hybrid zone with considering the communication quality in the hybrid zone of the vehicle ad-hoc network.The author’s main work include the following three parts:Part 1: The author uses the existing communication model to explain the relationship between the radius of the mix-zone,the transmission power and the reliable transmission success rate based on the Fries transmission formula,and proposes a hybrid zone establishment strategy based on the reliable transmission success rate.After that,the author describes the communication delay in the mix-zone in line with the characteristics of data transmission in the IEEE 802.11 p network,and proposes a comprehensive evaluation model of communication quality to measure the communication quality of the mix-zone according to the transmission success rate and the communication delay model.Part 2: The author designs a model based on the quantitative privacy level measurement standard for the anonymous update of privacy revenue estimation model for vehicles in the first place.This model is based on incomplete information,which can make the vehicle more accurately predict its own renaming revenue without knowing the renaming strategy of other vehicles.In addition,scene parameters are also set in the model.When using this model for simulation experiments,the scene parameters in the model can be adjusted to simulate the privacy profile of vehicles in the mix-zone in different environments.Next,the author designs a vehicle rename game strategy on the basis of the privacy revenue threshold based on this model.In this game strategy,the vehicle makes a decision on whether to participate in the pseudonym change based on the privacy revenue threshold.When the vehicle predicts that it participates in the pseudonym change and the privacy value is positive,it chooses to change the name,while when the privacy value is negative,it does not participate in the change of name.Lastly,the author proves that the game finally converges to the Nash equilibrium.Part 3: First,the author makes a dimensionless normalization process for the privacy value of the anonymous update of the vehicle,so as to obtain a dimensionless normalization parameter that can accurately reflect the degree of the privacy value of the vehicle’s pseudonym change.Then the author combines the communication quality parameters with the renamed privacy revenue estimation model,and designs a noncooperative game model of communication quality and privacy on the basis of incomplete information based on the combined model.In this model,the decisionmaking of the vehicle is based on the profit threshold.When the profit reaches the threshold standard,it participates in the pseudonym change,while when the profit does not reach the threshold standard,it does not participate in the pseudonym change.Finally,the author proposes a pseudonym change protocol to protect the privacy of vehicle information based on the game model.