Adaptive resource management with fuzzy bandwidth control for multi‐services in two‐tier wireless networks

Abstract In the next generation high‐speed wireless networks, one of the most challenging issues is to support multimedia applications with different quality‐of‐service (QoS) requirements. The triple play (voice, video and high speed data) being transmitted over wireless networks, especially real‐time variable bit rate (VBR) traffic, e.g. video, occupies a large amount of bandwidth and is transmitted and received in bursts. Therefore, inefficient bandwidth allocation may lead to under‐utilization of network resources. This paper proposes an Adaptive Resource Management Scheme (ARMS) for multimedia services in two‐tier wireless communication networks. A virtually adaptive‐based resource refund method is presented to adjust the passive capacity dynamically to reduce the blocking probability of real‐time calls. Furthermore, a fuzzy bandwidth controller is proposed to adaptively adjust the allocated bandwidth of real‐time VBR traffic to improve the system performance. The simulation results show that the proposed scheme further reduces the call blocking and dropping probability for real‐time and data calls to enhance the system performance.

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