Theoretical analysis of a kind of optical packet switching with feedback FDLs

Abstract

Due to lack of optical random access memory (ORAM), fiber delay lines (FDLs) is a good approach to contention resolution in optical packet switching (OPS). For studying of the performance of FDLs in content resolution strictly, a model of optical packet switching with feedback FDLs is established. The packet loss probability and the average delay time are deduced in theory. The results indicate that FDLs can improve the packet loss probability dramatically in low load but tardily in high load. Under the condition of low load, the difference of the average delay time with the different number of FDLs or input / output fibers is very small. In high load, the average delay time decreases with the increase of the number of input / output fibers and increases with the increase of the number of FDLs.