基于网络演算的动态可重构总线建模及关键参数确定  

UM-BUS modeling and key parameters determination based on network calculus

作　　者：周继芹[1,2] 王晶[1] 高岚 张伟功[1,4] ZHOU Ji-qin;WANG Jing;GAO Lan;ZHANG Wei-Gong(College of Information Engineering,Capital Normal University,Beijing 100048,China;School of Mathematical Sciences,Capital Normal University,Beijing 100048,China;Beijing Advanced Innovation Center for Imaging Theory and Technology,Capital Normal University,Beijing 100048,China;Beijing Engineering Research Center of High Reliable Embedded System,Capital Normal University,Beijing 100048,China)

机构地区：[1]首都师范大学信息工程学院,北京100048 [2]首都师范大学数学与科学学院,北京100048 [3]北京成像理论与技术高精尖创新中心,北京100048 [4]高可靠嵌入式系统技术北京市工程技术研究中心,北京100048

出　　处：《微电子学与计算机》2021年第5期30-35,共6页Microelectronics & Computer

基　　金：国家自然科学基金(61741211,61772350);北京市高水平教师队伍建设计划(CIT&TCD201704082);北京市科技新星计划项目(Z181100006218093);北京未来芯片技术高精尖创新中心科研基金项目(KYJJ2018008)。

摘　　要：嵌入式系统在使用UM-BUS总线时,总线仲裁时隙大小、协议包大小等关键参数对总线性能有很大的影响;必须通过数学模型建立与仿真分析等手段确定总线关键参数,确保总线传输时延满足系统的实时性需求.本文针对UM-BUS总线的实时性进行了建模和分析,利用网络演算理论建立了总线系统数据服务模型,得出了数据传输时延上界的解析结果表达式.给出了一个典型的无人艇控制系统实例,确定了最优的关键参数设置.通过仿真分析结果与实验统计结果的对比,验证了模型的准确性.When UM-BUS is used in embedded system,the BUS arbitration time slot size,protocol packet size and other key parameters have a great impact on the performance of the BUS.The key parameters of the BUS must be determined by means of mathematical model establishment and simulation analysis to ensure that the transmission delay of the BUS can meet the real-time requirements of the system.In this paper,the real-time performance of UM-BUS is modeled and analyzed,the data service model of the BUS system is established by using the network calculus theory,and the analytical result expression of the upper bound of the data transmission delay is obtained.A typical example of unmanned vehicle control system is given,and the optimal key parameter Settings are determined.The accuracy of the model is verified by comparing the simulation results with the experimental statistical results.

关 键 词：动态可重构总线 网络演算 仲裁时隙 传输时延 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]