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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。
The structure of SPC, SPL and SPN in optical packet switched is analyzed theoretically, and the formula of packet loss rate of three kinds of structures is deduced, and its system packet loss rate and load , The number of input optical fiber ports and the relationship between the number of wavelengths of each numerical calculation. The results show that the packet loss rate of SPN structure is lower than that of SPL at the same wavelength converter number (the limit value is not reached), and the number of wavelength converters required by SPN structure is less than The number of wavelength converters needed for the SPL structure.