Grid Job Routing Algorithms - Phosphorus

Grid Job Routing AlgorithmsAs Figure 6.5 indicates, when the LPF modulation format is used the CD effect becomes negligible and thethroughput of the network doesn’t degrade even for high traffic loads. The network performance degrades atlarge D CD values and when NRZ modulation format (instead of LPF) is used. With NRZ modulation format, theblocking probability curve rises at about 7 ps/(nm·km) and more than 30% of the requests have to be blockedwhen the fibers have 13 ps/(nm·km). The blocking probability may even reach the exceptionable value of 60%at D CD =20 ps/(nm·km); Thus, LPF modulation format is essential for optimizing the network’s performanceunder the CD impairment.Figure 6.5 : PHOSPHORUS testbed performance under CD noise impairment for various loads. DCMs areused.Similar experiments were performed using the NSFnet topology that consists of 14 nodes and 21 unidirectionallinks. The general conclusions for the NSF topology are similar to the ones presented here. Further details onthe simulation setup and results is reported in [lakoum07].Project:PHOSPHORUSDeliverable Number: D.5.3Date of Issue: 31/06/07EC Contract No.: 034115Document Code: Phosphorus-WP5-D5.361