Abstract
The coexistence of different cellular networks in the same area necessitates joint radio resource management for enhanced QoS provisioning and efficient radio resource utilization. We propose adaptive bandwidth management and joint call admission control (JCAC) scheme for heterogeneous cellular networks. The objectives of the proposed adaptive JCAC scheme are to enhance average system utilization, guarantee QoS requirements of all accepted calls, and reduce new call blocking probability and handoff call dropping probability in heterogeneous wireless networks. We develop a Markov chain model for the adaptive JCAC scheme and derive new call blocking probability, handoff call dropping probability, and average system utilization. Performance of the proposed adaptive JCAC scheme is compared with that of nonadaptive JCAC scheme in the same heterogeneous wireless network. Results show an improvement in average system utilization of up to 20%. Results also show that connection-level QoS can be significantly improved by using the proposed adaptive JCAC scheme.
Highlights
The coexistence of different cellular networks in the same geographical area necessitates joint radio resource management (JRRM) for enhanced QoS provisioning and efficient radio resource utilization
We evaluate the performance of the proposed AJCAC scheme with respect to new call blocking probability, New call blocking probability Handoff call dropping probability
We propose adaptive bandwidth management and joint call admission control (JCAC) scheme to enhance system utilization and connection-level QoS in heterogeneous cellular networks
Summary
The coexistence of different cellular networks in the same geographical area necessitates joint radio resource management (JRRM) for enhanced QoS provisioning and efficient radio resource utilization. Homogeneous CAC algorithms do not provide a single solution to address the heterogeneous architectures which characterize generation wireless network [6]. JCAC algorithms must manage individual services and technologies, and ensure that the QoS requirements of all admitted calls are satisfied while at the same time making the best use of the total resources available in the heterogeneous network. In the previous works mentioned above, no analytical model has been developed for JCAC algorithms in order to investigate connection-level QoS parameters in heterogeneous cellular networks. We propose adaptive bandwidth management and JCAC (AJCAC) scheme to enhance system utilization and connection-level QoS in heterogeneous cellular networks supporting multiple classes of calls such as voice and video. We combine adaptive bandwidth management and JCAC scheme to enhance system utilization and connection-level QoS in heterogeneous wireless networks.
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