Research On Real-time Network Management Mechanism Of Vehicle Network For Smart Car

With the rapid development of information technology,Internet of Things technology and microelectronics technology,digital information control is being popular instead of people control in automotive.Smart car is the product of electronization network and intelligentization.It provides centralized management and utilization of decentralized ECUs,and realizes collaborative control by sharing information and data of nodes through the in-vehicle network.As the number of ECUs continues to increase and functions become more complex,higher requirements are placed on the reliability and safety of communication.In-vehicle network management is to ensure the security and reliability of network communication through a distributed coordination mechanism.Based on the research of OSEK and AUTOSAR vehicle network management specification standards,this paper conducts in-depth research on the real-time network management mechanism of intelligent vehicle control system and OSEK network management performance optimization.This thesis,which is supported by Nature Science Fundation of Anhui Province,studies the implementation and performance optimization of in-vehicle network management systems.Firstly,the network architecture of the domain management of resource sharing and collaboration for the next generation of intelligent vehicle control system is given.And the design requirements of the vehicle network management based on the layered architecture are analyzed.The shortcomings of OSEK and AUTOSAR network management used in vehicle network management are also analyzed.On the basis of these,the real-time online management method of intelligent car network based on multi-layer collaboration is proposed.And the main network layer Ethernet network management mechanism based on AUTOSAR UDP NM is designed in detail.Secondly,The performance optimization of logic loop in the OSEK NM system is studied.The problem of NM timer parameter design is analyzed.Based on this,a dynamic logic loop optimization model that satisfies the message schedulability is established and designed,and we evaluation it by bandwidth utilization and network management real-time performance.The dynamic logic ring parameter optimization design model is established,and the optimal R_t solving algorithm and dynamic logic ring node coordination mechanism under different network conditions are given.Finally,the simulation platform is built in CANoe and the experimental scheme is designed.The feasibility of the multi-layer collaborative intelligent vehicle network real-time management and the effectiveness of the subnet layer dynamic logic ring mechanism are verified.The research in this paper has made a useful attempt to establish a highly reliable,low bandwidth consumption intelligent vehicle network communication management system.