基于时间触发的机载统一网络协议一致性测试技术  

An Airborne Unified Network Protocol Conformance Testing Technique Based on Time Trigger

作　　者：闫萍萍 李晖 陈银超 杨朝旭[1] 郭晓丹 YAN Pingping;LI Hui;CHEN Yinchao;YANG Zhaoxu;GUO Xiaodan(Chengdu Aircraft Design Institute,Chengdu 610041,China;Chengdu Jincheng College,Chengdu 610065,China)

机构地区：[1]成都飞机设计研究所,四川成都610041 [2]成都锦城学院,四川成都610065

出　　处：《电子科技》2025年第1期14-22,共9页Electronic Science and Technology

基　　金：航空基金项目(20180511001)。

摘　　要：基于时间触发的机载统一网络是下一代航空机载系统技术的重要发展方向。为实现网络设备快速可靠互联,需要建立网络协议标准并通过一致性测试保证网络信号品质可靠、协议正确无故障。文中基于AS6802及IEEE 802.3协议规范,结合机载网络需求选取适用于航空机载时间触发网络物理层及链路层标准,建立了机载统一网络设备标准。依据网络标准设计测试项目,结合测试需求建立了基于现场可编程门阵列(Field Programmable Gate Array,FPGA)的实物测试环境。使用光示波器、光功率计、光衰减器等设备进行发送端眼图、信号速率、上升下降时间、消光比、平均光功率、接收端误码率、接收灵敏度等物理层信号特性测试。通过特异性设备仿真端系统发送测试所需网络帧,进行链路层协议状态机、同步参数一致性测试。测试结果表明,被测网络设备误码率小于10-12,眼图等光电信号特性均满足物理层标准。状态机跳转符合链路层协议,重要同步参数满足主机所规定,所成品厂实现互联互通。Airborne unified network based on time trigger is an important development direction of next generation aviation airborne system technology.In order to achieve the rapid and reliable interconnection of network equipment,it needs to establish a network protocol standard and test the consistency test of the agreement to ensure that the network signal is reliable and the protocol is correct and trouble-free.Based on the AS6802 and IEEE 802.3 protocols and the requirements of airborne network,this paper selects the standards applicable to the physical layer and link layer of airborne time-triggered network,and establishes the airborne unified network equipment standard.According to the network standard design test project,in conjunction with the test needs,the FPGA(Field Programmable Gate Array)-based testing environment is established.The optical oscilloscope,optical power meter,optical attenuator and other devices are used to test the physical layer signal characteristics such as the sending end eye map,signal rate,rise and fall time,extinction ratio,average optical power,bit error rate at the receiving end,and receiving sensitivity.The network frame required for the test is sent by the specific device simulation end system,and the consistency test of link layer protocol state machine and synchronization parameters is carried out.The test results show that the bit error ratio of network devices is less than 10-12,and indicators such as eye maps meet the physical layer standards.The state machine jump meets the link layer protocol.Important synchronization parameters meet the requirements.Manufacturers achieved interconnection.

关 键 词：协议一致性测试 机载网络 时间触发网络 物理层测试 链路层测试 飞控系统 网络互联 网络测试 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]