WDM光网络OXC节点控制管理单元

为了对光交叉连接 (OXC)节点中的光通道进行路由控制 ,以及对波分复用 (WDM)光网络的性能和节点运行状况进行实时监测 ,文章采用了模块化结构的设计方法 ,针对自行研制的两条输入链路 8个波长通道的 OXC节点 ,实现了节点控制管理单元的硬件平台和软件平台。在 WDM光实验网中 ,利用节点控制管理单元的自愈控制功能 ,实现了线路保护倒换和二纤单向环形网络复用段的自愈保护。实验表明 ,当网络发生故障时 ,通过线路保护倒换 ,节点可以在小于 4m s的时间内自动完成从工作链路到保护链路的切换 ,符合 ITU - T建议的要求。

Control and management unit for optical cross-connects in WDM optical transport networks

The wavelength routing state in OXCs (optical cross connects) and the status of the WDM (wavelength division multiplexing) optical transport network can be controlled and monitored by the network management center and local managers through the modular control and management unit designed for the OXC consisting of two input and output links with 8 wavelength channels. Network self healing is also realized in a network employing backup routings and a unidirectional double ring network by the self healing mechanism controlled by the control and management unit. Experiment shows that self healing takes place within 4 ms in case of a fiber cut, which is well below the requirements of the ITU T recommendations for high capacity networks.