Uniform band thinning call admission control for QoS provisioning in wireless networks

Abstract

Utilization of limited resources and quality of service (QoS) improvement are most important challenges for wireless networks. Excessive call blocking of lower priority traffic is very often event at higher traffic rate in multiple services. Considering these factors, we proposed a uniform band thinning call admission control (CAC) scheme that reduces the call blocking probability of lower priority traffic classes with approximately steady call blocking probabilities for the higher priority traffic classes with ensuring the satisfied QoS. Our proposed scheme introduces the acceptance factor in specific bands where calls get access according to the predefined uniform acceptance factor throughout the bands independent of channel occupancy. Else, analytically we characterize that the performance of our proposed scheme in the aspect of call blocking probability (CBP), channel utilization, and overall call blocking probability are better than the conventional fixed guard band (FGB) scheme.