通过对传统运载火箭地面测发控网络系统采用以太网技术不能满足实时性要求高的信息传输的分析，提出基于SDH技术的运载火箭地面测发控网络系统方案。由于SDH设备具有状态快速检测技术和快速保护协议，使得该系统在传输链路故障情况下的切换时间，较传统的以太网方案提高89.7%；且由于SDH网络提供端到端的电路连接，具有电路交换的高实时性优点，保证信息传输的实时性。结果表明，基于SDH的测发控网络系统不仅在传输链路故障情况下的切换时间较传统以太网方案有较大提高，且可以保证实时性要求高的信息传输。%As traditional ethernet technology cannot meet the real-time requirements of information transmission for the measurement and control ground network system of launch vehicle, the scheme of SDH-based measurement and control ground network system is proposed. Because of the fast detection technology and fast protection protocol of the SDH equipment, the switching time under the transmission link failure is reduced by 89.7%. Due to the end to end circuit connection, the system has the advantages of high real-time performance of circuit switching, the real-time information transmission is guaranteed. The results show that the switching time of the SDH-based measurement and control network system improves greatly, and the information transmission with high real-time requirement is guaranteed.
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