A self-extracting accurate modeling for bounded-delay video services.pdf

A self-extracting accurate modeling for bounded-delay video services Marcelo Dias de Amorima,b,*, Otto Carlos M.B. Duarteb aLIP6 Laboratory Universite? Pierre et Marie Curie 8, rue du Capitaine Scott, 75015 Paris, France bGTA COPPE/Poli, Universidade Federal do Rio de Janeiro, P.O. Box 68504 21945-970 Rio de Janeiro, RJ, Brazil Received 13 September 2002; revised 3 September 2003; accepted 2 October 2003 Abstract This article proposes the XGOP-B deterministic traffic model for MPEG video services requiring strict bounds on the quality of service provided by the network. The XGOP-B model takes advantage of two characteristics of MPEG video traffic by performing a two-level analysis of such sources. In our scheme, the traffic parameters are directly obtained by a single-input single-output parameter extracting algorithm. The proposed algorithm is autonomous and leads to a single set of parameters for each video stream avoiding user interaction determine the most appropriate set of parameters. We show through analysis of several video traces that these original features of the XGOP- B model yield accurate parameterizations at a low complexity cost. Our results show that the accuracy of the XGOP-B model leads to significant improvements when compared with the accuracy of the other traffic models. Furthermore, the complexity is evaluated through the number of traffic parameters and we show that it can be substantially decreased. q 2003 Elsevier B.V. All rights reserved. Keywords: Bounded-delay services; MPEG video; Deterministic characterization; Modeling accuracy 1. Introduction The development of efficient communication systems to transport variable bit rate (VBR) video has been a major challenge in recent years. An efficient use of the bandwidth and the provision of the required quality of service (QoS) are two important keys for the success of oncoming applications. Mechanisms to access and manage network resources must be provided to avoid bandwidth misuse and to im