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Bandwidth Reservation in the Erlang Multirate Loss Model for Elastic and Adaptive Traffic

Authors:
Ioannis Moscholios
Vassilios Vassilakis
Michael Logothetis
John Vardakas

Keywords: loss system; blocking probability; reservation; elastic-adaptive traffic; recursive formula

Abstract:
In this paper, we consider a single-link multirate loss system, which accommodates K service-classes with different traffic and peak-bandwidth requirements. Calls of each service-class arrive in the system according to a Poisson process and have an exponentially distributed service time. The K different service-classes are distinguished in Ke elastic service-classes and Ka adaptive service-classes (K=Ke + Ka). Elastic calls can compress their peak-bandwidth by simultaneously increasing their service time, while, adaptive calls can tolerate bandwidth compression without affecting their service time. The system incorporates the bandwidth reservation (BR) policy whereby we can achieve certain quality of service (QoS) for each service-class through a proper bandwidth allocation, defined by the BR parameters. To calculate, in an approximate but efficient way, Call Blocking Probabilities (CBP) and link utilization, we propose a recurrent formula for the determination of the link occupancy distribution. The accuracy of the proposed formula is verified by simulation and is found to be very satisfactory. We also show the consistency and the necessity of the new model.

Pages: 148 to 153

Copyright: Copyright (c) IARIA, 2013

Publication date: June 23, 2013

Published in: conference

ISSN: 2308-4030

ISBN: 978-1-61208-279-0

Location: Rome, Italy

Dates: from June 23, 2013 to June 28, 2013