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 ,即可将所有串扰视为非相干 The effect of queuing delay caused by optical output buffer in optical packet switching on node crosstalk characteristics is studied. A mathematical model of the relationship between node crosstalk and buffer length is established. The results show that the number of crosstalk sources increases with the length of buffer because of the presence of buffer. For crossover, non-coherent crosstalk accounts for the majority, and the number of random crosstalk has less influence. When the buffer When longer, the effect of coherent crosstalk is negligible, and all crosstalk can be considered incoherent