SPC、SPL和SPN波长转换竞争解决的研究

Contention Resolution Scheme Based on SPC、SPL and SPN Wavelength Conversion

摘要:

对光分组交换中波长共享(SPC)、链路共享(SPL)和节点共享(SPN)的结构进行了理论分析, 推导出三种结构的丢包率公式, 并对其系统丢包率与负载、输入光纤端口数和每纤波长数的关系进行了数值计算。结果表明: 在相同的波长转换器数目(没有达到极限值)时, SPN结构的丢包率低于SPL的丢包率, 并且在接近极限值时, SPN结构所需要的波长转换器数目也小于SPL结构所需要的波长转换器数目。

Abstract:

The schemes based on SPC, SPL and SPN wavelength conversions were analyzed in theory and the formulations of packet loss probability in these schemes were deduced. Simulations on the relationship between the packet loss probability and load, the port number of input fiber and the number of wavelength per fiber were carried out. The results indicate that the packet loss probability of SPN is less than the SPL under the same number of wavelength converters. The number of wavelength converters that the SPN needs when the packet loss rate approaches to the limit, is less than that for the SPL.