基于网络演算的机载TSN端到端最坏时延分析模型  

Airborne TSN End-to-End Worst-Case Delay Analysis Model Based on Network Calculation

作　　者：陈晨 郑智明[2] 张小贝[1] 张琦[1] CHEN Chen;ZHENG Zhiming;ZHANG Xiaobei;ZHANG Qi(School of Communication and Information Engineering Shanghai University,Shanghai 200000 China;Shanghai Aircraft Design and Research Institute,Shanghai 201000 China)

机构地区：[1]上海大学通信与信息工程学院,上海200000 [2]上海飞机设计研究院,上海201000

出　　处：《电光与控制》2025年第2期54-59,85,共7页Electronics Optics & Control

基　　金：国家基金(2022YFB3904300)。

摘　　要：时间敏感网络(TSN)中的帧复制与消除(FRER)冗余机制通过数据包的复制与消除功能来提高网络的可靠性,数据包通过复制功能复制到冗余路径上,随后路径合并,消除函数删除重复项。这种冗余方案会影响TSN的时序行为,导致端到端不确定性增加。为此,通过结合时间感知调度整形(TAS)算法,设置不同的门控参数减少FRER机制所带来的时延,并为机载TSN提供一种基于网络演算(NC)的最坏时延计算的数学模型,对多业务数据传输时的端到端时延上界进行定量分析,评估TSN下的机载网络是否满足通信要求。通过OMNET对某飞机网络拓扑进行仿真,验证TSN技术在民机航电网络的适用性及模型对机载TSN通信系统的端到端最坏时延分析的可行性,为网络资源优化提供依据。The Frame Replication and Elimination for Reliability(FRER)redundancy mechanism in Time Sensitive Network(TSN)improves the reliability of the network through the replication and elimination functions of data packets.Data packets are copied onto the redundant paths through replication function and then the paths are merged and the elimination function removes duplicates.This redundancy scheme affects the timing behavior of the TSN resulting in increased end-to-end uncertainty.To this end by combing the Time Aware Shaper(TAS)algorithm the delay problem caused by the FRER mechanism is reduced by setting different gating parameters and a worst-case delay calculation model based on Network Calculus(NC)is provided for airborne TSN and the upper bound of end-to-end delay in multi-service data transmission is quantitatively analyzed to evaluate whether the airborne network under TSN meets the communication requirements.Finally the network topology of certain aircraft is simulated by OMNET which verifies the applicability of TSN technology in civil aircraft avionics network and the availability of this model for end-to-end worst delay analysis of airborne TSN communication system and provides a basis for network resource optimization.

关 键 词：时间敏感网络 FRER机制 网络演算 OMNET 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]