ring switching

The article analyzes all factors concerning switching time of bi-directional multiplex section protection ring on 2-fiber, gives the approximate engineering calculation formula and basis.

本文对影响SDH二纤双向复用段保护环的倒换时间的各种因素进行了分析，给出了工程设计中的近似计算公式与依据。

In the last part of this thesis, considering input threshold power distance of bistability switch point, input threshold power of bistability switch point, stabilization, switching time and so on, we design a erbium doped fiber ring resonator switch with double-directional coupler.

综合考虑开关阈值功率的间隔、开关阈值功率的大小、稳定性、开关转换时间等因素，选取适当的参数，设计了一个掺铒光纤环腔双稳开关。

The fabric inherits good performance of the traditional three stage indirect interconnection network, and possesses good scalability due to the adoption of the ring network at its second stage, which solves the problem that the present switching fabrics cannot obtain both of the two characters simultaneously.

在继承传统三级间接连接网络良好性能的基础上，通过在中间级引入环网络，解决了现有大容量分组交换网络无法兼顾良好性能和可扩展性的问题。