DIMA系统实时通信流量的时延分析方法  

Real-time communication flow latency analysis of DIMA systems

作　　者：许晋瑞[1] 李峭[1] 赵露茜[1] 熊华钢[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《计算机工程与设计》2015年第4期879-885,共7页Computer Engineering and Design

基　　金：国家自然科学基金项目(61301086);国家863高技术研究发展计划基金项目(2011AA110101);航空科学基金项目(20131951027);教育部基础科研业务费基金项目(YWF-14-DZXY-018)

摘　　要：在分布式综合模块化航空电子(DIMA)系统中,采用综合化互连,同时支持时间触发(TT)通信流量和事件触发通信的速率约束(RC)流量。使用体系结构分析与设计语言(AADL)建立DIMA系统实时通信任务模型,提出一套基于模型的实时通信流量时延分析方法。对于TT流量,在AADL"流时延"框架下进行分析;对于RC流量,开发模型转换工具,将网络配置转换为便于实时演算(RTC)的参数,求解最坏情况下的时延;两方面相结合,实现DIMA系统混合关键性流量的端到端实时性能分析。通过一个典型的案例验证了该流量建模与时延分析方法的有效性。In the distributed integrated modular avionics（DIMA）system,interconnections were integrated and multiple classes of flows including time-triggered（TT）and rate-constrained（RC）flows were both supported.Models of real-time communication tasks were constructed by the architecture analysis and design language（AADL）.Moreover,a method of real-time flow latency analysis was proposed.TT flows were analyzed using the AADL flow latency analysis framework,while a tool for model transformation was developed to derive fundamental parameters for real-time calculus（RTC）to compute the worst-case end-toend latency of RC flows from the AADL models.Those two aspects were combined to implement the real-time performance analysis of mixed-criticality flows in DIMA systems.Finally,an example was given to demonstrate the effectiveness of the method mentioned above.

关 键 词：实时通信 时延分析 分布式综合模块化航空电子 体系结构分析与设计语言 实时演算 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]