论文部分内容阅读
介绍了两种新颖的光分组交换结构——MOD1和MOD2,用于解决分组冲突问题.其特点在于,MOD1共享了一组非简并的延迟线,而MOD2则是共享了一组简并的延迟线和波长转换器.研究表明,对于非突发业务,两种结构都只需要少量的延迟线即可获得理想的性能.此时,MOD1比MOD2更加能降低系统体积和成本.而对于突发业务,如果MOD1所共享的延迟线数量和MOD2所共享的延迟线和转换器的总数量相等,MOD2的分组丢弃率要远远低于MOD1.随着业务突发程度的增加,MOD2中的转换器数量也需要增加才能维持给定的分组丢弃率,但即使业务突发程度很高,MOD2在体积、成本和性能等三方面均可取得较理想的折衷.
Two novel optical packet switching architectures, MOD1 and MOD2, are introduced to solve the packet collision problem, which is characterized in that MOD1 shares a group of non-degenerate delay lines and MOD2 shares a set of degenerate Delay line and wavelength converter.Research shows that for non-burst services, both architectures only need a small amount of delay line to get the ideal performance.At this time, MOD1 can reduce the system volume and cost more than MOD2. In MOD2, if the number of delay lines shared by MOD1 is equal to the total number of delay lines and converters shared by MOD2, the packet discard rate of MOD2 is much lower than that of MOD1. As the service burst level increases, The number of converters also needs to be increased to maintain a given packet discard rate, but even with a high degree of bursty traffic, MOD2 achieves a better compromise in terms of size, cost and performance.