基于网络演算的AVB网络流量接纳准则研究  

Method for AVB flow acceptance based on network calculus theory

作　　者：刘艳萍 赵洋 王艳明 LIU Yanping;ZHAO Yang;WANG Yanming(School of Electronics and Information Engineering,Hebei University of Technology,Tianjin 300401,China;The 93501 Army of Chinese People′s Liberation Army,Beijing 100061,China)

机构地区：[1]河北工业大学电子信息工程学院,天津300401 [2]中国人民解放军93501部队,北京100061

出　　处：《河北工业大学学报》2021年第4期44-50,共7页Journal of Hebei University of Technology

基　　金：国家自然科学基金(61301086)。

摘　　要：针对AVB网络中的流量整形机制,考虑在网络演算方法的基础上,对其进行流量接纳准则的分析。将AVB流预留协议约定的两类优先级扩展为三类优先级;结合信用量整形机制的信用量消耗规则,实现高、中、低三类优先级流量的服务曲线计算,并完成各类流量端到端传输实时性的分析;依据于端到端传输延时的变化,提出AVB流量接纳准则。基于该流量接纳准则,分别分析接纳高、中、低优先级流量时已有流量产生的延迟变化量,结果表明:所提出的流量接纳准则适用于AVB网络,具有保障流量传输稳定性的作用。Focused on flow shaping mechanism in AVB network,the method for flow acceptance is analyzed based on the theory of network calculus.The existed two classes of priority defined in AVB flow reservation protocol are extended into three kinds.Combined with the rule of credit consumption in AVB,the service curves for the high,middle and low priority flows are calculated,and the real-time performance of all kinds of flows are analyzed.According to the change of the end-to-end transmission delay,AVB flow acceptance rule is proposed.Based on the acceptance rule,the delay varia⁃tion caused by accepting new flow with the high,middle and low priority are analyzed respectively.The results show that the proposed flow acceptance rule is suitable to AVB network and ensures the transmission stability for different priority flows.

关 键 词：AVB网络 流量整形算法 流量接纳 网络演算 端到端延迟 

分 类 号：TN393.03[电子电信—物理电子学]