Performance Modeling Of Software Defined Iov Based On Network Calculus And Its Application In Routing

Software Defined IoV(SD-IoV)applies Software Defined Network(SDN)to the traditional Internet of Vehicles(IoV),and has gained extensive research.Compared with traditional IoV,SD-IoV can allocate network resources more flexibly.Different applications of SD-IoV has different Quality of Service(QoS)requirements for data transmission,and the optimal path of data transmission should meet its QoS requirements.Network performance evaluation is an important foundation for software definition of efficient resource allocation and supporting QoS of applications.In this paper,a specific study was made on the above issues.The content is as follows:First,fixed-end performance modeling for SD-IoV based on network calculus.First of all,the SD-IoV network architecture is studied,and its data transmission is divided into fixed part and mobile part.For the SD-IoV fixed-end data transmission performance analysis,the model of the SD-IoV switch is analyzed,and the arrival and the processing of the data flow and data flow are analyzed.Then use network calculation to model the data through a single switch and end-to-end data transmission,and calculate the QoS parameters of data transmission.It was then verified by experiments.The results show that the established fixed-end performance analysis model can be used to calculate the software-defined definition of the performance boundary of the fixed-end data transmission of the car network.Secondly,in order to analyze the performance of the mobile terminal and the overall SD-IoV,the IEEE 802.11 communication protocol was analyzed.Then based on the IEEE 802.11 communication model,the access delay of data transmission between the vehicle and the AP node is analyzed.After combining the performance analysis model of data transmission at the mobile end and the data transmission performance analysis model at the fixed end,a performance analysis model for data transmission between vehicles and servers in the SD-IoV was constructed.The QoS parameters of vehicle-to-server data transmission in SD-IoV are calculated,and the correctness of the performance analysis model constructed is proved through experiments.Finally,the design and implementation of SD-IoVQoS routing algorithm based on network calculus.In order to guarantee the QoS of SD-IoV data transmission,the established SD-IoV performance analysis model based on network calculus is combined with two heuristic algorithms(Genetic Algorithm and Simulated Annealing).QoS routing algorithm based on GA and a QoS routing algorithm based on SA are designed.Finally,the SD-IoV scenario and routing algorithm are implemented.The algorithm designed in this paper is compared with the widely used load balancing algorithm in the software-defined car networking.The results show that the QoS routing algorithm designed in this paper has certain advantages in terms of QoS guarantee.