基于OPNET的混合关键性网络建模与仿真分析

混合关键性网络是一种新型的通信架构,可以满足非实时性和实时性业务的需求.为分析其网络性能,提出在OPNET网络仿真环境中建模的方法.以开放式系统互联模型为基础,采用层次化建模,构建网络的节点模型和进程模型.该模型考虑了事件触发和时间触发消息的特点,通过设计调度算法和容错方式,实现了仿真实验的灵活配置和端到端延迟抖动等性能指标的验证.对仿真结果的性能分析表明,混合关键性网络能够保证实时业务的确定性以及兼容标准以太网的非实时业务.

OPNET-based modeling and simulation analysis of mixed-criticality systems.

A mixed-criticality system is a novel communication architecture that meets the requirements of all applications from non-real-time application to real-time application. To evaluate mixed-criticality system's performance,the network modeling method is developed based on the OPNET network simulation environment. Based on Open System Interconnection ( OSI) model,layered modeling method is adopted to implement node model and process model of mixed-criticality system. By considering the character of time-triggered and event-triggered communication,through designing scheduling algorithm and fault-tolerant modes,the model realizes flexible configuration of simulation and verification of end-to-end delay jitter. The performance analysis from simulations proves that mixed-criticality system achieves determinism prop-erty of real-time traffic and is full compatible with non-real-time traffic of standard Ethernet.