一种光交换核心节点调度算法研究  

Research on a scheduling algorithm for optical switching core nodes

作　　者：张泰[1] 柴继文 

机构地区：[1]国网四川省电力公司电力科学研究院,成都610000

出　　处：《光通信研究》2015年第4期22-24,41,共4页Study on Optical Communications

基　　金：国家电网公司科技项目-全光交换关键技术及电网应用研究

摘　　要：光交换核心节点是光交换网络的核心设备,其性能的优劣直接影响网络的吞吐量、时延等重要指标。文章提出一种SWC-MSD(基于波长变换器的多播空分交换)模块的严格无阻塞光交换核心节点,在此基础上提出了三种调度算法,通过数学分析和实验仿真验证了算法的正确性。考察了这种核心节点在有无波长变换以及业务优先级不同的场景下阻塞率的变化情况,结果表明所提出的严格无阻塞光交换核心节点具有较低的阻塞率。The core node is a key device of optical switching networks and its performances have a direct bearing on the main in-dexes of the switching networks such as throughput and latency.This paper presents a wavelength converter-based strictly non-blocking switching core node structure and on this basis proposes three scheduling algorithms.Then it verifies their correctness by numerical analysis and experimental simulation and examines the variations of their blocking rates in different scenes,such as with or without wavelength conversions and service priority considerations.It is concluded that the proposed structure has fairly low blocking rate.

关 键 词：光交换结构 调度算法 阻塞率 波长变换器 

分 类 号：TN915[电子电信—通信与信息系统]