采用部分共享光缓存和共享波长转换器的光分组交换节点性能分析

本文研究了采用部分共享缓存(PSB)和共享波长转换器(SWC)的光分组交换节点在自相似流量下分组丢失率和时延与输出光缓存深度、循环共享光缓存的深度和组数以及波长转换器数量之间的关系,并讨论了相关的尺度和规模问题.结果表明,部分共享光缓存和共享波长转换器的光分组交换节点交换结构可以达到很高的性能;采用共享方式可显著减少波长转换器的数量;在保持共享缓存总的深度不变的情况下,适当增加循环共享光缓存组数可以使交换达到更好的性能.

Performance Analysis of Optical Packet Switching Employing Partially Shared Buffering and Shared Wavelength Converter

The performance of optical packet switching employing partially shared buffering (PSB) and shared wavelength converter (SWC) for self-similar traffics are studied.The effects of output buffers,the PSBs and SWC on the packet loss probability and delay are analyzed with consideration on the issues,such as dimension of switching matrix,buffering size,etc.The simulation results show that optical packet switching nodes with PSB and SWC are of good performance.The scheme of SWC can obviously reduce the number of wavelength converters in comparison with the scheme employing wavelength converters at each input wavelength path.For fixed depth,grouping PSB into several subgroups can improve the performance of optical packet switching nodes.