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Channel Borrowing Admission Control Scheme in LTE/LTE-A Femtocell-Macrocell Networks

Olusegun O. Omitola and Viranjay V. M. Srivastava
Department of Electronic Engineering, Durban–4041, South Africa

Abstract—Provisioning Quality of Service (QoS) is a challenging issue in the mobile cellular networks. Supporting different QoS requirements for different traffic is much more challenging in LTE-A femtocell-macrocell networks. Different call traffic types can be assigned to different level of priority to accommodate more calls with stringent QoS. In this study, a channel borrowing Call Admission Control (CAC) Scheme in femtocell-macrocell integrated Long Time Evolution-Advanced (LTE-A) networks is proposed. In this scheme, for a better QoS of handover calls, some of the system bandwidth is reserved for the handover calls. This reserved channel can however be borrowed by the Non Real-Time (NRT) new calls whenever it is not used by the handover calls to reduce the total number of blocked calls. The simulation results, when compared to the conventional scheme without borrowing shows the advantage of this scheme in terms of resource utilization, blocking probability of new originating calls, and dropping probability of handover calls.

Index Terms—CAC, LTE/LTE-A, femtocell, macrocell, QoS, wireless networks

Cite: Olusegun O. Omitola and Viranjay V. M. Srivastava, " Channel Borrowing Admission Control Scheme in LTE/LTE-A Femtocell-Macrocell Networks,” vol. 14, no. 10, pp. 900-907, 2019. Doi: 10.12720/jcm.14.10.900-907.