Design Of TTE Network Simulation Software

The development of high-precision control systems such as aerospace and vehicle-mounted systems has put forward higher requirements for the integrated information and communication network with high reliability and real-time performance.On the basis of traditional Ethernet,TTE plans data transmission channels strictly in accordance with the time schedule to provide a conflict-free and deterministic data transmission method for services in the network.Features such as fault tolerance and the flexibility and dynamics of traditional Ethernet combine to support various types of application services and are widely used in aerospace,vehicle bus,and industrial control environments.In the process of researching and improving the key mechanisms of the TTE network,it often relies on simulation means to simulate the operation of services,and is used to compare and analyze the performance of scheduling algorithms.This article will focus on the design and implementation of TTE network simulation software based on the existing "MAC simulation platform" in the laboratory.Considering requirements of TTE network simulation software,this article first introduces the research background of TTE and the current research status at home and abroad.Secondly,in-depth analysis of the working principle of the TTE network,according to the simulation needs and TTE network operating principles,design the overall architecture of the TTE network simulation software and explain its main module functions.Third,the design and implementation of the main simulation module of the TTE network simulation software is introduced: the graphical simulation function module implements a friendly software operation interface,and the network topology can be dynamically generated by mouse dragging;the background simulation network module provides basic network simulation The functions of time schedule management,network analysis,node management and other functions have realized TTE network simulation based on discrete event simulation system.The time schedule management module provides the schedule configuration and parsing functions in the TTE network.The network analysis module can analyze network data(such as packet delay,bandwidth,etc.).The node management module is responsible for the encapsulation of node business data from the upper application layer to the physical layer and exchanging data in switch node,and reserves interfaces for business generation,time synchronization,queue management and other mechanisms for subsequent researchers to use Different algorithms further enrich the simulation process.The interface processing module is a part of the node processing module.Multiple ports are mounted under each interface to implement mechanisms such as redundancy and de-redundancy when sending and receiving data packets to ensure normal data transmission and reception between nodes.Finally,the module function verification of the TTE network simulation software was carried out to ensure that the modules were normal when the software was assembled.And designed and built two verification environments,based on different network topologies to verify the correctness of the TTE network simulation function.The verification results show that the TTE network simulation software designed in this paper can simulate the operation process of the TTE network correctly.