光纤延迟线和可调谐波长转换器在光分组交换网络竞争解决结构中的性能分析.pdf

第 33 卷第 9 期 光 子 学 报 VoI. 33 No. 9 2004 年 9 月 ACTA PHOTONICA SINICA September 2004 Performance Analysis of Fiber Delay Lines and Tunable Wavelength Converters for Contention Resolution in Optical Packet Switched Networks * 1 1 1 2 1 Wang Jianxin ，Zeng Oingji ，Zhang Zhizhong ，Wang Shenghua ，xiao ShiIin 1 RD Center for Broadband Optical Networking Technology ，Shanghai Jiaotong Uniuersity ，Shanghai 200030 2 Beijing Lyang Technology Co. ，Ltd. ，Beijing 100085 Abstract In this paper ，two contention resoIution schemes have been studied ，nameIy ，feedback-based fiber deIay Iines （FDLs ）Architecture （FFA ）and feedback-based combined sharing of FDLs and tunabIe waveIength converters （TWCs ）architecture （FFTA ），for non-bursty traffic and bursty traffic on the basis of our opticaI packet switched test-bed. It is demonstrated that for non-bursty traffic ，FDL is a preferabIe choice than TWC whiIe TWC is a preferabIe one than FDL for non-bursty traffic to resoIve contention in opticaI packet switching networks. Numeric resuIts confirm that FFA is sufficient to obtain a reasonabIe packet Ioss probabiIity （PLP ）for non-bursty traffic ，whiIe for bursty traffic ，FFTA ，performs much better given that the totaI number of FDLs and TWCs used eguaIs to those of FDLs used in FFA. With the increase of the average burst Iength ，the number of TWCs in FFTA wiII graduaIIy increase