Paper Info
Title
Effect Of Number Of Burst Assemblers On Tcp Performance In Optical Burst Switching Networks
Abstract
Burst assembly mechanism is one of the fundamental factors that determine the performance of an optical burst switching (OBS) network. In this paper, we investigate the influence of number-of burstifiers on TCP performance for an OBS network. An ns2-based OBS network simulator is developed for simulating the optical network. The goodput of TCP flows between an ingress and an egress nodes traveling through an optical network is studied for different values of the number of assembly buffers per destination. First, the losses resulting from the congestion in the core OBS network are modeled using a burst independent Bernoulli loss model. Then, a background burst traffic is generated to create contention at a core node in order to realize a burst dependent loss model. Simulation results show that for an OBS network employing timer-based assembly algorithm, TCP goodput increases as the number of burst assemblers is increased for both types of loss models. The improvement from one burstifier to moderate number of burst assemblers is significant (15-50% depending on the burst loss probability, processing delay and the TCP version), but the goodput difference between moderate number of buffers and per-flow aggregation is relatively small, implying that a cost-effective OBS edge switch implementation should use moderate number of assembly buffers per destination for enhanced TCP performance.
Year
DOI
Venue
2006
10.1109/BROADNETS.2006.4374326
2006 3RD INTERNATIONAL CONFERENCE ON BROADBAND COMMUNICATIONS, NETWORKS AND SYSTEMS, VOLS 1-3
Keywords
Field
DocType
optical burst switching,network simulator,transport protocols,cost effectiveness
Optical burst switching,Computer science,Computer network,Network simulation,Burst switching,Edge device,Timer,Goodput,Moderate number,Processing delay
Conference
Citations 
PageRank 
References 
2
0.38
4
Authors
2
Name
Order
Citations
PageRank
Guray Gurel171.55
Ezhan Karasan228641.74