Call Admission Control based on Adaptive Bandwidth Allocation for Wireless Networks

Abstract

Provisioning of Quality of Service (QoS) is a key issue in any multi-media system. However, in wireless systems, supporting QoS requirements of different traffic types is more challenging due to the need to minimize two performance metrics - the probability of dropping a handover call and the probability of blocking a new call. Since QoS requirements are not as stringent for non-real-time traffic types, as opposed to real-time traffic, more calls can be accommodated by releasing some bandwidth from the already admitted non-real-time traffic calls. If we require that such a released bandwidth to accept a handover call ought to be larger than the bandwidth to accept a new call, then the resulting probability of dropping a handover call will be smaller than the probability of blocking a new call. In this paper we propose an efficient Call Admission Control (CAC) that relies on adaptive multi-level bandwidth-allocation scheme for non-real-time calls. The scheme allows reduction of the call dropping probability along with increase of the bandwidth utilization. The numerical results show that the proposed scheme is capable of attaining negligible handover call dropping probability without sacrificing bandwidth utilization.

Cited by in corpus (12)

• Interference Management Based on RT/nRT Traffic Classification for FFR-Aided Small Cell/Macrocell Heterogeneous Networks
• A game theoretical approach for QoS provisioning in heterogeneous networks
• Class-Based Service Connectivity using Multi-Level Bandwidth Adaptation in Multimedia Wireless Networks
• A New Guard-Band Call Admission Control Policy Based on Acceptance Factor for Wireless Cellular Networks
• Radio Resource Allocation for Scalable Video Services over Wireless Cellular Networks
• Radio Resource Management for Dynamic Channel Borrowing Scheme in Wireless Networks
• Interference Declination for Dynamic Channel Borrowing Scheme in Wireless Network
• On Demand Cell Sectoring Based Fractional Frequency Reuse in Wireless Networks
• Class-Based Interference Management in Wireless Networks
• Radio Resource Management Based on Reused Frequency Allocation for Dynamic Channel Borrowing Scheme in Wireless Networks
• Adaptive Resource Management for Multimedia Applications in Femtocellular and Macrocellular Networks
• QoS Provisioning Using Optimal Call Admission Control for Wireless Cellular Networks