IMPACT OF LINK FAILURES ON THE PERFORMANCE OF MULTIHOP LIGHTWAVE NETWORKS

The impact of link failures on the performance of multihop lightwave n etworks such as shufflenet (SN), hypercube (HC), is evaluated by detai led computer simulation study. The degradation in network throughput o f the above networks due to link failures is compared for several rout ing schemes, namely store-and-forward (SF), hot-potato (HP), and singl e-buffer deflection (DF) routing. The throughput degradation due to li nk failures is found to be minimum for HP routing. The HC network is m uch better suited for surviving multiple failures than SN of the same size. The simulation study is also extended to consider the impact of link failures in multiwavelength shufflenet (MWSN) employing dynamic w avelength routing. For MWSN, the degradation in throughput increases w ith in, the number of wavelengths per fiber link. (C) 1998 Elsevier Sc ience B.V.