Call Admission Control for QoS provisioning in Multimedia All-IP Wireless and Mobile Networks

K. L. Dias, S. F. L. Fernades, D. F. H. Sadok

DOI: 10.14209/sbrt.2003.777

Evento: XX Simpósio Brasileiro de Telecomunicações (SBrT2003)

Keywords: Wireless and mobile networks QoS call admission control

Abstract

This paper proposes a novel call admission control (CAC) mechanism for wireless and mobile networks. Our proposal avoids per-user reservation signaling overhead and takes into account the expected bandwidth to be used by calls handed off from neighboring cells within a prediction interval through the Trigg and Leach Method (an adaptive exponential smoothing technique) [13]. Our scheme is compared through simulations with the ACR (Adaptive Channel Reservation) [10] scheme, a dynamic reservation-based proposal that uses GPS systems to extrapolate users’ movement and to trigger reservations in the next predicted cell. The simulation results show that our proposal provides the best performance in terms of handoff dropping probability and can achieve similar levels of call blocking probability as compared to ACR. In addition, our proposal can grant an upper bound on handoff dropping probability even under very high loads.

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