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Blocking Equalization in the Erlang Multirate Loss Model for Elastic Traffic

Authors:
Ioannis Moscholios
Vassilios Vassilakis
Michael Logothetis
Anthony Boucouvalas

Keywords: loss system; blocking probability; reservation; elastic traffic; Markov chain

Abstract:
We consider a single-link loss system of fixed bandwidth capacity, which accommodates K service-classes of Poisson traffic with different bandwidth-per-call requirements. Depending on the occupied link bandwidth, in-service calls can tolerate bandwidth compression while increasing their service time (elastic calls). In this system, we study the effect of the bandwidth reservation (BR) policy on various performance measures and mainly on Call Blocking Probabilities (CBP). The BR policy can achieve CBP equalization among serviceclasses, or, alternatively, guarantee a certain quality of service for each service-class. We provide a recurrent formula for the calculation of the link occupancy distribution. Based on it we determine CBP, link utilization and average number of calls in the system. The accuracy of the proposed formula is verified by simulation and is found to be quite accurate.

Pages: 12 to 17

Copyright: Copyright (c) IARIA, 2010

Publication date: October 25, 2010

Published in: conference

ISSN: 2326-9383

ISBN: 978-1-61208-103-8

Location: Florence, Italy

Dates: from October 25, 2010 to October 30, 2010