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Efficient bandwidth allocation and call admission control for VBR service using UPC parameters

机译:使用UPC参数对VBR服务进行有效的带宽分配和呼叫接纳控制

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摘要

Provision of Quality-of Service (QoS) guarantees is an important and challenging issue in the design of Asynchronous Transfer Mode (ATM) networks. Call Admission Control (CAC) is an integral part of the challenge and is closely related to other aspects of network designs such as traffic characterization and QoS specification. Since the Usage Parameter Control (UPC) parameters are the only standardized traffic characterizations, developing efficient CAC schemes based on UPC parameters is significant for the implementation of CAC on ATM switches. In this paper, we develop a CAC algorithm called TAP (derived from TAgged Probability) as well as two other CAC algorithms using the UPC parameters. These CAC algorithms are based on our observation that the loss-probability-to-overflow-proratio tends to decrease as the number of sources increases. By introducing the loss-probability-to-overflow-probability ratio K, we find that this ratio sheds light on increasing resource utilization while still guaranteeing QoS. Analysis, simulation, and numerical results have shown that the proposed TAP algorithm is simple and efficient.
机译:在异步传输模式(ATM)网络的设计中,提供服务质量(QoS)保证是一个重要且具有挑战性的问题。呼叫准入控制(CAC)是挑战的组成部分,与网络设计的其他方面(如流量表征和QoS规范)密切相关。由于使用参数控制(UPC)参数是唯一标准化的流量特性,因此基于UPC参数开发有效的CAC方案对于在ATM交换机上实施CAC具有重要意义。在本文中,我们开发了一种称为TAP的CAC算法(源自TAgged Probability)以及使用UPC参数的其他两种CAC算法。这些CAC算法基于我们的观察结果,即随着来源数量的增加,对溢出比例的损失概率趋于降低。通过引入丢失概率与溢出概率之比K,我们发现该比率有助于提高资源利用率,同时仍能保证QoS。分析,仿真和数值结果表明,所提出的TAP算法简单有效。

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