一种新的光突发交换节点结构研究  

A Novel Design of Photonic Switches in Optical Burst Switching Networks

作　　者：王晟[1] 罗蕴翰[1] 王雄[1] 王靖[1] 姚锐[1] 彭亮[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都610054

出　　处：《电子学报》2004年第F12期86-92,共7页Acta Electronica Sinica

基　　金：国家 8 63计划重大项目资助 (No 2 0 0 2AA1 2 2 0 2 1 )

摘　　要：与波长路由技术和光分组交换相比较 ,光突发交换 (OpticalBurstSwitching ,OBS)更适合于构建未来的光因特网 .OBS核心交换节点的设计必须在保证一定的交换性能的同时 ,尽量降低光器件成本 .本文提出了一种新的光突发交换结构 ,称为PM× 1×P结构#.该结构有效地克服了使用光纤延迟线或光缓存等器件所导致的内部阻塞问题 ,提高了交换结构的吞吐量 ;同时 ,与具有相似性能的交换结构相比 ,该结构所需要的光器件较少 ,成本较低 .通过对比仿真实验 ,结果验证了该结构的优越性 .Compared to the Wavelength Routing (WR) and Optical Packet Switching (OPS) networks,Optical Burst Switching (OBS) is believed to be a more attractive technical solution for future Internet infrastructure.One of the issues of design of OBS switches is how to keep the implementation cost low while maintain high performance.A novel design of photonic switch for OBS networks is proposed,which is called PM×1×P structure.The Internal Blocking can be effectively avoided in this structure,hence much higher throughput of data burst can be achieved.On the other hand,the proposed design uses less optical elements in terms of optical switching elements,multiplexers and couplers.It turns out to be a more cost-saving design than other photonic switches with similar throughput performance.Results of extensive simulations are presented,and the performance of proposed design is proved.

关 键 词：光交换节点 内部阻塞 光纤延迟线 光突发交换 

分 类 号：TN929.11[电子电信—通信与信息系统]