A traffic behavior-aware fair call admission control for heterogeneous services in wireless networks

Abstract

Fair call admission control (CAC) for heterogeneous services with different traffic properties, such as wideband and narrowband calls, is an important subject in wireless networks. B.M. Epstein et al. (see IEEE JSAC, vol.18, no.3, p.523-34, 2000) proposed a novel CAC scheme, independent multiclass one-step prediction with complete sharing and reservation (IMOSP-CS and IMOSP-RES), which ensures that wideband calls are not blocked more than narrowband calls. However, such an IMOSP algorithm can often lead to some abnormalities, not guaranteeing call blocking probability (CBP) fairness and high resource utilization, depending on traffic behavior. It is mostly because the resource adjustment algorithm in IMOSP simply increases or decreases only one bandwidth unit independent of traffic properties. These abnormalities can be easily seen where offered traffic load between services differs greatly. We propose a novel CAC scheme to admit wideband and narrowband calls fairly regardless of traffic behavior. Also, we propose a new resource management algorithm to enhance utilization. These improvements are largely dependent on seeking a reservation partition for each class based on prediction and measurement. Simulation results demonstrate that our CAC scheme actually achieves CBP fairness for wideband and narrowband calls and also improves resource utilization.