基于1553B协议的星载高速无线数据网络协议的设计*

星载无线数据网络可以解除航天器内错综复杂的线缆网的束缚,是航天器轻小型化的重要技术储备。旨在替代航天器内现有的点对点三线制的LVDS线缆,提出了一种基于脉冲超宽带(IR-UWB)技术的星载高速无线数据网络的设计方案,并重点介绍了高速无线网络协议的设计和实现。网络协议设计参考了美国军用数据总线标准MIL-STD-1553B 协议,采用时分制指令响应机制,分别对其物理层、链路层、网络层和应用层进行设计,以适应星载高速率无线数据传输的要求,具有灵活性高、可靠性高、扩展性高的特点。网络协议的IP核经过地面演示系统进行验证,实验测得应用层数据传输的误码率小于10_-10。

Design of the network protocol of a wireless spacecraft high speed data network based on 1553B protocol

Wireless spacecraft data networks unburden the wire problems of the spacecraft, which makes it a promising technology for spacecraft light miniaturization. To replace the peer-to-peer three-wire LVDS cables in the spacecraft, design of a spacecraft high speed data network based on IR-UWB was proposed. The wireless communication protocol referring to the American military data bus standard MIL-STD-1553B protocol was described in detail. The communication protocol adopted the time division command/response mechanism, and its physical layer, data link layer, network layer and application layer were designed to meet the requirements of high data rate communication. The Design of a demonstration of the spacecraft high speed data network was tested and verified by the FPGA. It is proved that the system bit error rate is less than 10_-10. Design of the protocol IP core is flexible, reliable and scalable.