Research And Implementation Of Time-Sensitive Networking Configuration Management Based On IEEE 802.1Qcc

Nowadays,with the continuous improvement of the real-time and deterministic requirements of the network in the industrial control field,TSN(Time-Sensitive Networking)mainly stipulates the three functions of clock synchronization,traffic scheduling and system configuration.Among them,for system configuration,the TSN working group formulated the IEEE 802.1Qcc standard with a centralized network/distributed user model as the core.CNC(Centralized Network Configuration,centralized network configuration)can fully perceive the capabilities of each bridge in order to Provide deterministic scheduling for TSN streams.By studying the IEEE 802.1Qcc standard,this thesis designs a set of configuration management system for TSN on the basis of existing switches supporting TSN protocols such as 802.1Qbv,802.1Qci and 802.1Qbu.The main tasks are as follows:1.Analysis of time-sensitive network time synchronization,gated scheduling and frame preemption and other related standards,in-depth study of time-sensitive network configuration management model,according to Qcc standard definition of topology discovery,YANG model configuration and traffic scheduling function,analysis of LLDP working principle and reporting Document transmission mechanism;study the four-layer structure and function of the NETCONF protocol,focus on analyzing the NETCONF C/S communication architecture and the YANG model to model the NETCONF content layer data;study the time-sensitive network gate control scheduling mechanism to ensure the certainty of key traffic transmission.2.Propose a time-sensitive network configuration management system design plan to realize the three functions of topology discovery,YANG model configuration and traffic scheduling.Among them,for the topology discovery function,the network manager obtains topology information through SNMP,and uses a hierarchical traversal algorithm to search the entire network equipment;for the YANG model configuration function,install the TSN YANG module on the network manager and the TSN switch side and design the corresponding configuration interface;Design a cycle-based flow scheduling algorithm to ensure the deterministic transmission of key flows when the total bandwidth of the mixed flow blocks the entire network link.3.Build a set of TSN configuration management system verification platform,develop the automatic configuration function of Qbv and Qbu of TSN switch,and verify the configuration management function of the system.The test results show that the TSN switch has successfully implemented the LLDP function,and the system correctly displays the entire network topology;CNC automatically generates a gated scheduling table to ensure the deterministic transmission of critical traffic;configures the frame preemption function parameters on the Web,and the CNC generates an XML file and sends it to TSN The switch realizes the function of remote configuration.The entire system can automatically configure and manage the TSN stream to achieve the purpose of plug and play.