光网络中光信噪比受限的光组播路径分配机制(英文)  

OSNR Constrained Multicast Lightpath Provisioning Mechanism in All Optical Network

作　　者：白晖峰[1] 陈雨新[1] 王东山[1] 

机构地区：[1]国网电力科学研究院北京南瑞智芯微电子科技有限公司,北京100192

出　　处：《光子学报》2014年第3期20-24,共5页Acta Photonica Sinica

基　　金：The National High Technology Research and Development Program of China(No.2011AA05A11)

摘　　要：组播业务的迅速增长对现有光网络的光路分配提出了更高的挑战.针对在大规模的光网络中,由于光组播路径中光信噪比过低导致传输层光链路无法正常工作,并由此带来"假性信令成功"的问题,提出了一种光信噪比受限的光组播路径分配机制.该机制充分利用光网络节点中光信噪比监测功能,在信令消息中携带光信噪比性能参量,并在光组播路径分配的信令过程中将光信噪比作为光波长分配的重要依据.通过该机制,控制平面在信令过程中充分考虑光信噪比因素,确保传输层的光组播路径得以顺利建立并正常工作.仿真结果表明,所提出的基于光信噪比感知的组播光路分配机制能够解决"假性信令成功"的问题,并有效降低光组播路径的阻塞率.In large scale optical networks, great challenge are brought by the fast growing of multicast services. Multicast lightpath-tree may fail to work in data plane due to the low OSNR （optical signal to noise ratio） value, even though the signaling procedure is successful in the control plane. That is called ＂false signaling-success＂ in control plane. To solve this problem, an OSNR Constrained Multicast Lightpath Provisioning Mechanism （OC-MLPM） was proposed. The OC-MLPM makes advantage of the OSNR monitoring function in each node, and is able to allocate the wavelength by judging the OSNR value carried in signaling message in order to make sure lightpath could be established smoothly in both data plane and control plane for multicast service. Simulation results show that the OC-MLPM is able to solve the ＂false signaling-success＂ problem, and to reduce the blocking probability effectively as well.

关 键 词：光通信 光网络 组播 光路分配 光信噪比 控制平面 信令 

分 类 号：TN929.18[电子电信—通信与信息系统]