摘要
光网络中引入全光交换技术可以无需进行光电光转换和电信号处理,使网络具备透明性,大大降低节点的复杂性和节点成本。多粒度交换节点减小了交换矩阵的规模,降低了交换矩阵的复杂性,是波分复用(WDM)网络节点发展的一个方向。随着正交频分复用(OFDM)技术的引入,带宽可变的节点技术得到了越来越广泛的关注。文章介绍了传统的基于波长的光交叉连接器(OXC)交换结构、多粒度交换结构,以及基于正交频分复用/单载波频分复用(OFDM/SCFDM)的节点交换结构,并通过实验对基于带宽可变的可重构的光分插复用器(ROADM)、OXC节点技术进行了验证。在实验中提出的基于子波带的交换结构中,节点容量达到了P比特量级。
All-optical switching technology without optical-electrical-optical(OEO)conversion creates transparency in an optical network and greatly reduces the complexity and cost of the node.Multi-granularity optical cross-connect reduces the scale and complexity of the switching matrix—which indicates the direction of the wavelength division multiplexing(WDM)optical network.With the development of orthogonal frequency division multiplexing(OFDM),bandwidth-variable optical node technology has become the focus of attention.This paper introduces the switching architecture of optical cross-connect(OXC)and multi-granularity optical cross-connect based on wavelength.It also introduces the node switching architecture of OFDM and single-carrier frequency division multiplexing(SCFDM).An experiments with bandwidth-variable reconfigurable optical add-drop multiplexer(ROADM)and OXC is presented.The node in the proposed optical switching has Pbit/s capability.
出处
《中兴通讯技术》
2011年第6期1-4,19,共5页
ZTE Technology Journal
基金
国家重点基础研究发展("973")规划(2010CB328202)
国家自然科学基金(60931160439)
关键词
全关交换
多粒度光交换节点
可变带宽
P比特交换节点
all optical switching
multi-granularity optical cross-connect node
bandwidth variable
Pbit/s switching node