低加速比下输出端排队交换结构的性能分析

Performance Analysis of Output Queuing Switch in the Condition of Low Speedup

在已有的研究中,为了使输出端排队(OQ)交换结构满足理想的吞吐率和传输时延性能,需要其内部加速比等于交换端口数。将从理论上推导加速比小于交换端口数的情况下OQ交换结构的信元丢包率和传输时延,并利用数值计算的方法证明:只要达到一定的加速比(小于满加速比),OQ结构就能达到满加速比时的性能。

In previous study, in order to make the output queuing （OQ） switching structure meet the ideal performance of throughput and transfer delay, it is required that the internal speedup should be equal to the number of switching ports. Deduces the OQ switching structure＇s cell loss possibil- ity and transfer delay theoretically in the case that the speedup is less than the number of switching ports. Proves a OQ switch with a suitable speedup that can also reach the high per- formance of a OQ switch with a full speedup by numerical calculation analysis.