基于光网状网物理层的智能全光保护方案设计  

Design of intelligent all-optical protection scheme based on the physical layer of mesh optical network

作　　者：韩瑜[1] 张旭苹[1] 

机构地区：[1]南京大学光通信工程研究中心,南京210093

出　　处：《东南大学学报（自然科学版）》2009年第6期1135-1141,共7页Journal of Southeast University：Natural Science Edition

摘　　要：光网状网物理层的智能全光保护方案采用基于"双发选收"模式的1+1保护方式.方案设计包含硬件和软件2个方面,硬件部分为一种新型的智能实时监测保护设备,软件部分为一种保护光路径自动建立算法.算法运行于设备之中,能够事先为每条工作光路径在保护光纤网络中寻找并建立对应的保护光路径.设备对工作光路径中的光功率进行实时监测,当工作光路径发生故障时,及时切换到保护光路径.最后以一个12节点光网状网为例,给出了保护光路径自动建立算法的仿真结果.采用该保护方案能够以全光保护方式实现光网状网的透明无阻断通信.The design of the intelligent all-optical protection scheme based on the physical layer of the mesh optical network is introduced.This scheme obeys the principle of 1＋1 protection method which is based on the ＂dual fed selective receiving＂ mode.The scheme consists of hardware design and software design.A new type of intelligent real-time monitoring and protecting device and an algorithm of automatic establishment of the protecting light path are designed.The algorithm runs within the device and enables the device to establish a protecting light path in the protection fiber network for each corresponding working light path in advance.The real-time optical power of the working light paths is monitored by the device.Once the fault of the working light path occurs,the device will switch to the corresponding protecting light path immediately.The algorithm is assumed to be implemented in a 12-node mesh optical network,and the simulation result is given.By using the proposed protection scheme,the transparent uninterrupted communication of mesh optical network can be achievable in the way of the all-optical protection.

关 键 词：光网状网 物理层 智能全光保护方案 保护光路径自动建立算法 

分 类 号：TN915[电子电信—通信与信息系统]