光分组交换节点中缓存器对串扰相干特性的影响  

Buffer′s Effect on Coherent Character of Crosstalk in Optical Packet Switching Node

作　　者：王春华[1] 贾潞华[1] 黄肇明[1] 朱炳春[1] 闫晓光[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《光学学报》2002年第8期942-946,共5页Acta Optica Sinica

基　　金：上海市科委基金项目"光分组交换城域网计算机仿真(98JC14 0 0 6 )"资助课题

摘　　要：研究了光分组交换中光输出缓存器引起的排队延迟对节点串扰特性的影响 ,建立了节点串扰特性与缓存器长度之间关系的数学模型。结果表明 ,对光分组交换节点 ,由于缓存器的存在 ,串扰源数目随缓存器的长度增加而增加 ;串扰中 ,非相干串扰占多数 ,数目随机的相干串扰的影响较小 ;且当缓存器较长时 ,相干串扰的影响可以忽略 。The effects of queuing delay of output buffer on the property of crosstalk in optical packet switching nodes are investigated. The analytical relationship between crosstalk and buffer length is derived. It is concluded that the crosstalk increases with the increase of buffer length. Among the crosstalk sources, the most of them are incoherent, and the probability of coherent crosstalk decreases with the increase of buffer length significantly, and if the buffer length is longer enough, the coherent crosstalk could be neglectable.

关 键 词：节点 光分组交换 串扰 光缓存器 同步数字系列 SDH 排队延迟 光通信 数学模型 相干串扰 非相干串扰 

分 类 号：TN929.1[电子电信—通信与信息系统] TN914.332[电子电信—信息与通信工程]