机载LTPB与FDDI网络分析与比较

The Analysis and Comparison of LTPB and FDDI Network on Board

对ＬＴＰＢ和ＦＤＤＩ两种光纤数据总线的拓扑结构、传输协议和消息延时等特性进行了比较分析。ＬＴＰＢ总线是为航空电子系统设计的网络协议，它具有功耗低，容错能力和实时性强的特点，将成为未来飞行器上总线系统的主流。ＦＤＤＩ可支持很大的网络规模，技术成熟成本低。

This paper analyses the topologies,transfer protocols and message latencies for LTPB and FDDI fiber optic data buses.The LTPB is designed for avionics,which has features of low power consumption,high fault tolerance and real time capability.It will be main bus system used on flight vehicles in the future. The FDDI could support large scale network,has mature technique and low cost features.It can meet the needs of large commercial aircraft.