针对仲裁环型与交换式FC-AE-1553总线时间延迟不易确定的问题, 提出了一种新的基于无源光网络的总线型FC-AE-1553结构。该结构采用下行广播、上行分时复用的传输机制, 消息在总线上的传输时间延迟非常确定, 方便用户根据时序严格编排总线任务, 适合应用于航空航天等强实时要求的环境。

To solve the uncertainty of time delay existing in arbitrated loop and switched topology of FC-AE-1553, a novel bus structure based on passive optical network was proposed which insures the confirmation and real-time performance. Transmission delay time for each message on bus is extremely certain in which the mechanism is broadcast in the downstream direction and time sharing in the upstream direction. FC-AE-1553 based on bus topology can support users to arrange task according to bus timing and it is suitable for application in aerospace and other hard real-time environment.