Research And Design Of Node Mechanism In Vehicle INICnet Network

With the increasing demand for cross-domain communication,mobile services,autonomous driving and other applications within the vehicle,INICnet network is widely expected to replace MOST network as the next generation of in-vehicle infotainment system backbone network.At present,the international standard of INICnet network has not been released for a long time,and the application and development of INICnet network technology at home and abroad are in the initial stage.Although the data link layer protocol of INICnet network guarantees the reliability of node communication,the application of vehicle-mounted network requires specific node management mechanism to guarantee real-time and reliability.Therefore,in order to promote the industrialization application of INICnet network in China,it is of great value and significance to deeply study and design the node management mechanism of vehicle-mounted INICnet network.Aiming at the problems existing in node management of INICnet network,this thesis deeply studied the node management mechanism of CAN network and MOST network,designed and implemented the centralized node management mechanism based on INICnet network,established the equivalent model of series and parallel to analyze the influence of centralized node management mechanism on network reliability,and finally set up the hardware test environment in the loop to complete the test and analysis of centralized node management mechanism.The contents of this paper are as follows:Firstly,this thesis described the research status of vehicle-mounted network and vehicle-mounted network management at home and abroad,and analyzed the problems existing in INICnet network node management application.Then,this thesis studied INICnet network data transmission and way of addressing,and contrastly analyzed the advantages and disadvantages of CAN and MOST network node management mechanism and application scope,determined the requirements of real-time monitoring,remote configuration,connection management,and analyzed the INICnet network state transition process,proposed the centralized node management mechanism based on INICnet network,this thesis established a series-parallel equivalent model to analyze the effect on the reliability of centralized node management mechanism.Finally,specific software design and implementation are carried out for INICnet network centralized node management mechanism,and verified the centralized node management mechanism in the loop test environment.The data showed that the initialization time of the centralized management mechanism is 304.412 ms,which is 95% shorter than the 8700 ms of MOST network,and improved the real-time performance of the network.At the same time,completed the network reliability and durability performance tests.The number of available nodes consistented with the number of nodes in the actual test,and improved the network reliability.