一种无线网络综合业务带宽预留方案中多阈值的最优值

Asmaa M. Saafan, H. Elbadawy, S. Elramly
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引用次数: 1

摘要

当无线接入网被用于多媒体业务的传输时,在下一代蜂窝网络中提供有保证的服务质量(QoS)已成为一个巨大的挑战。呼叫允许控制(CAC)是无线电资源管理(RRM)中最重要的组成部分之一,它直接影响到所提供的带宽利用效率和QoS保证。本文提出了一种多阈值带宽保留方案,为新呼叫阻塞和切换呼叫丢失概率之间的权衡提供了一种可接受的解决方案。本文的主要目标是找到带宽阈值的最优值。此外,采用总代价函数和损失概率来满足无线环境下的带宽管理要求。该方案通过部署二维马尔可夫过程来评估系统性能。在整个工作中,对最佳阈值进行了详细的数值研究。
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An optimal value of multi-threshold in the bandwidth reservation scheme of integrated services over wireless networks
Provisioning of guaranteed Quality of Service (QoS) in next generation cellular networks has become a great challenge specially, when the wireless access networks have been used to deliver the multimedia services. Call Admission Control (CAC) is one of the most important components of Radio Resource Management (RRM) that affects the provided bandwidth utilization efficiency and QoS guarantees. In this paper, a multi-threshold bandwidth reservation scheme is proposed to provide an acceptable solution for the trade-off between new call blocking and handoff call dropping probabilities. The major objective of this paper is to find the optimal values of the bandwidth thresholds'. In addition, the total cost function and loss probabilities were adopted to fulfill the requirements of bandwidth management in wireless environments. The proposed scheme is modelled by deploying a two-dimensional Markov process to evaluate the system performance. Throughout this work, a detailed numerical investigation for the optimal thresholds is conducted.
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