Design And Implementation Of Low-latency And Security Networking Protocols In High-speed Movement Scenario

With the development of science and technology,the scale and speed of the railway industry are constantly increasing.High-speed train communication has become an important part of the application of mobile communication systems and has received more and more attention,but this has also brought more challenges.The services in the highspeed train-ground communication scenario have high requirements for low latency and reliability.The nodes move fast and different types of services have different transmission requirements.The difference in transmission delay and the frequency of information interactions have brought great challenges to low-latency and highly reliable communications.Research on low-latency transmission has been carried out earlier at home and abroad,but it is mostly found in low-speed or high-speed and low-dynamic environments.Existing architectures and solutions cannot meet the reliability requirements at the same time.At the same time,high-speed train communication needs to transmit safety information,which also puts forward higher requirements for the safety certification transmission between nodes.The current communication protocol design is not yet perfect and in-depth research is still needed.In view of the node service transmission performance requirements in the study,this paper first investigates the research background of high-speed train-to-ground communication protocols,analyzes the current status of inter-node communication research in different application systems,and briefly describes the communication protocol framework of the train communication network based on time division duplex.Then,the design of high-speed train communication protocol was carried out,which were designed from the two aspects of low-latency networking mechanism and communication authentication and authentication mechanism.The protocol scheduling process was optimized to meet the needs of high-speed train communication business.Finally,by demonstrating communication business indicators,the performance of the protocol before and after optimization is compared,and a verification platform is built to verify the applicability and reliability of the optimized protocol.At the protocol design level,in the low-latency scheduling protocol part,this article reduces the message collision and reduces the message interaction delay by simplifying the network information maintenance and resource application authorization process.In order to meet the requirements of communication security and reliability,this paper designs a communication authentication and authentication mechanism,optimizes the authentication process,reduces the number of information interactions in the authentication network access process,and realizes the network access function between nodes more quickly,making it more suitable for high-speed movement communication scenarios.On the engineering implementation level,this paper builds a software verification platform based on the Visual Studio development environment and a hardware platform based on the Xilinx Zynq-7035 + AD9361 development board,the communication mechanism is designed on two sets of platforms to implement the protocol function,and the applicability and reliability of the optimized protocol are verified.This article studies high-speed train communication in both theoretical analysis and engineering practice,proposes targeted solutions,designs protocol optimization mechanisms to improve network performance,and implements function verification and performance verification on software and hardware platforms,has a certain reference value for the improvement of communication performance in high-speed train communication.