面向空间应用的时间触发以太网

将时间触发协议增加到采用星型拓扑结构的以太网业务上,且保持完全兼容IEEE802.3标准,可解决空间有效载荷使用标准以太网通信遇到的实时性、确定性和可靠性问题。时间触发以太网基于全局基准时间,实时数据传输遵循严格的时序,支持时间和事件触发的两种通信过程。时间触发通道适合同步或周期性实时消息的传输,而事件触发通道适用于偶发或非周期性消息的传输。设计了空间应用以太网的拓扑结构和协议栈,介绍了系统通信的过程,进行了时间触发协议的研究,并对同步性能和网络性能进行了仿真验证。该以太网在保证可靠性、安全性的同时,增强了网络的灵活性,提高了网络利用率。

Time-triggered Ethernet for space utilization

Ethernet for space utilization adds time-triggered protocol to a star topology network using Ethernet services, moreover maintains fully compatible with the standard IEEE802.3.This Ethernet can effectively solve real-time, deterministic and reliability problems on communications for payload communicating through general Ethernet. Time-triggered Ethernet is based on global reference time, which real-time data transmission keeps strict timing and supports simultaneously time and event-triggered communication. Time-triggered channel in this Ethernet is suitable for real-time synchronization or periodic message transmission, event-triggered channel is suitable for sporadic or aperiodic message transmission. This article designs an Ethernet topology and protocol stack for space utilization, describes system communication process, studies time-triggered protocol, and simulates synchronization and network performance. This Ethernet can ensure reliability and security, enhance flexibility, and greatly improve network availability.