面向客舱系统的G.8032以太环网保护技术研究  

Research on G. 8032 Ethernet ring protection technology forcabin system

作　　者：李俊生 杜稀晖 刘毅 伍兴艳 胡林瑶 LI Junsheng;DU Xihui;LIU Yi;WU Xingyan;HU Linyao(CETC Avionics Co.,LTD.,Chengdu 611731,China)

机构地区：[1]中电科航空电子有限公司,成都611731

出　　处：《民用飞机设计与研究》2025年第1期81-88,共8页Civil Aircraft Design & Research

摘　　要：以太环网具有减少飞机布线、易维护和易扩展等优点,已应用于飞机客舱系统网络中。但由于以太环网存在广播风暴风险,需引用以太环网保护技术。分析了国内外的以太环网保护技术特点和不足。由于当前客舱系统环网中采用的STP/RSTP以太环网保护技术不满足客舱系统网络承载旅客广播、客舱内话和乘客音视频等应用所需的毫秒级环网保护要求,因此,需要对客舱系统以太环网保护的收敛性能进行改进。提出了基于G.8032标准的客舱系统以太环网保护技术解决方案,介绍了ITU-T G.8032/Y1344(简称G.8032)以太环网保护协议的工作原理、消息和协议状态机,以及对环网保护的收敛性能进行了验证。最后针对G.8032协议中FDB(filtering database)刷新导致的数据洪泛,提出了减少过滤数据库刷新的方法,解决了客舱系统以太环网保护时存在的数据洪泛问题。G.8032协议支持单环网和多环互连的组网,支持备份链路,具有小于50 ms的环网保护性能。改进后的G.8032以太环网保护技术可以满足客舱系统应用需求。Ethernet ring has the advantages of reducing aircraft wiring,good maintainability,and flexible scalabil⁃ity,and has been used in the cabin system network of aircraft.However,there is a risk of broadcast storm in Ether⁃net ring,so it is necessary to use Ethernet ring protection technology.This article analyzes the characteristics and weakness of Ethernet ring protection technologies at domestic and foreign.The STP/RSTP currently used in the cabin system ring does not meet the millisecond level ring protection requirements for cabin system network to carry passenger address,cabin interphone and passenger audio and video applications.Therefore,it is necessary to im⁃prove the convergence performance of the cabin ring protection.This article proposes one solution of Ethernet ring protection technology based on the G.8032 in cabin system,and introduces the principle,message and state ma⁃chine of ITU-T G.8032,and its convergence performance of ring protection is verified.Finally,a method was pro⁃posed to reduce the data flooding caused by FDB(filtering database)refresh in the G.8032,the method solve the data flooding issue during Ethernet ring protection in cabin system.G.8032 protocol supports single ring and multi ring interconnection networking,supports backup links,and has ring failure protection capability of less than 50 milliseconds.The improved G.8032 may meet the requirements of the applications in cabin system.

关 键 词：以太环网保护 环网保护链路 虚拟局域网 自动保护倒换 过滤数据库 

分 类 号：V243[航空宇航科学与技术—飞行器设计]