Analytical Blocking Probability Model for Hybrid Immediate and Advance Reservations in Optical WDM Networks
BibTeX
@MISC{Triay_analyticalblocking,
author = {Joan Triay and Cristina Cervelló-pastor and Vinod M. Vokkarane and Senior Member},
title = {Analytical Blocking Probability Model for Hybrid Immediate and Advance Reservations in Optical WDM Networks},
year = {}
}
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Abstract
Abstract—Immediate reservation (IR) and advance reservation (AR) are the two main reservation mechanisms currently implemented on large-scale scientific optical networks. They can be used to satisfy both provisioning delay and low blocking for delay tolerant applications. Therefore, it seems reasonable that future optical network provisioning systems will provide both mechanisms in hybrid IR/AR scenarios. Nonetheless, such scenarios can increase the blocking of IR if no quality of service (QoS) policies are implemented. A solution could be to quantify such blocking performance based on the current network load and implement mechanisms that would act accordingly. However, current blocking analytical models are not able to deal with both IR and AR. In this paper, we propose an analytical model to compute the network-wide blocking performance of different IR/AR classes within the scope of a multi-service framework for optical WDM networks. Specifically, we calculate the blocking on two common optical network scenarios using the fixed-point approximation analysis: on wavelength conversion capable and wavelength-continuity constrained networks. Performance results show that our model provides good accuracy compared to simulation results, even in a scenario with multiple reservation classes defined by different book-ahead times. Index Terms—Analytical model, immediate reservation, advance reservation, WDM, optical networks. I.
Keyphrases
advance reservation optical wdm network hybrid immediate analytical blocking probability model analytical model index term analytical model provisioning delay multiple reservation class good accuracy delay tolerant application optical network current network load hybrid ir ar scenario common optical network scenario performance result implement mechanism immediate reservation network-wide blocking performance wavelength conversion main reservation mechanism large-scale scientific optical network future optical network low blocking different book-ahead time simulation result different ir ar class abstract immediate reservation multi-service framework fixed-point approximation analysis
