Adaptive mobility aware call admission control for mobile hotspot networks
Enoruwa Obayiuwana, Olabisi Emmanuel Falowo · 2016
This paper investigates the call admission control and wireless network resource utilization for mobile Hotspot (MH) networks. MH is a small moving wireless network with the integration of mobile relay node. MH offers diverse applications in areas, such as: high-speed rail coaches (HSRCs), trams and buses. MH support has become an attractive feature for next-generation wireless networks (NGWNs). User equipment (UE) in MH demands excellent wireless communication access and services. MH users can enjoy improved quality of service (QoS), lower transmission power and enhanced channel quality gains. However, due to the relatively small capacity size and mobility, the network performance of MH could easily get swamped/overwhelmed by any resource demand surge from UEs that could appear within its network coverage. This could lead to network congestion and QoS degradation. QoS provisioning for UEs in MH networks is an important and challenging issue. The call admission control (CAC) algorithm is necessary to admit and regulate traffic into the MH networks. Effective CAC helps to ensure that the accepted UEs are provided with the guaranteed QoS. Traditional CAC schemes are not designed for moving wireless networks. In this work, we proposed an Adaptive Thinning Mobility Aware (ATMA) CAC scheme for MH networks. We present a comprehensive analytical framework to analyse the QoS performance of our proposed scheme, using Markov chain model. New call blocking probability, handoff call dropping probability and resource block utilization are investigated. The numerical results reveal improved QoS performance of ATMA CAC compared to the traditional non-mobility-aware thinning (NMAT) CAC scheme.