A New Call Admission Control Mechanism for Multimedia Traffic over Next-Generation Wireless Cellular Networks
Issue No. 01 - January (2008 vol. 7)
Polychronis Koutsakis , IEEE
Michael Paterakis , IEEE
The subject of Call Admission Control (CAC) for wireless networks has been studied extensively in the literature. Another subject on which many researchers have focused their attention is that of video traffic modeling. However, user mobility, combined with the rapidly growing number of "greedy" , in terms of bandwidth and Quality of Service (QoS) requirements, multimedia applications form a challenging and yet unresolved problem for third and fourth generation wireless networks. In recent work we have built a Discrete Autoregressive (DAR(1)) model to capture the behavior of multiplexed H.263 videoconference movies from VBR coders. Based on this model, we propose in this work a new efficient CAC scheme for wireless cellular networks, which differs from the existing proposals in the literature in that it uses precomputed traffic scenarios combined with online simulation for its decision-making. Our scheme is shown, via an extensive simulation study comparison and a conceptual comparison with well-known existing approaches, to clearly excel in terms of QoS-provisioning to users receiving videoconference and web traffic. To the best of our knowledge, this is the first work in the relevant literature where such an approach has been proposed.
Call Admission Control, Downlink Wireless Channel, Traffic Modeling, Videoconferencing, H.263 Video Encoding, Web Traffic.
S. Chatziperis, M. Paterakis and P. Koutsakis, "A New Call Admission Control Mechanism for Multimedia Traffic over Next-Generation Wireless Cellular Networks," in IEEE Transactions on Mobile Computing, vol. 7, no. , pp. 95-112, 2007.