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首页> 外文期刊>Journal of High Speed Networks >The Adaptive Stochastic Rate Allocation algorithm for Available Bit Rate traffic management in ATM networks
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The Adaptive Stochastic Rate Allocation algorithm for Available Bit Rate traffic management in ATM networks

机译:ATM网络中可用比特率流量管理的自适应随机率分配算法

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摘要

The Adaptive Stochastic Rate Allocation (ASRA) algorithm for ABR traffic management in ATM networks is presented. As the dynamics and parameters of the traffic flow process are poorly known, the adaptive feedback gain depends not only on the parameters' estimates, but is also modulated by current uncertainty of the parameters. Therefore, the control algorithm expresses its dual nature by simultaneously performing two functions: ceaseless estimation of parameters and the process control. The allowed cell rates of the ABR sources are dynamically shaped by the feedback messages based on the instantaneous queue size in the ATM switch output buffer. The ASRA scheme is evaluated via simulation testing in comparison with the ERICA and BECN schemes. The requirements tested included: utilization, queuing delay, queuing delay variance, and queue size. The results of a simulation study suggest that the ASRA scheme can provide for higher priority VBR traffic, while retaining almost the same average utilisation, considerably shorter average queue length, average queuing delay and particularly queuing delay variance in the ATM switch output buffer. The ASRA scheme's fairness in max-min sense along with fast transient response is demonstrated.
机译:提出了用于ATM网络中ABR流量管理的自适应随机速率分配(ASRA)算法。由于交通流程的动力学和参数知之甚少,因此自适应反馈增益不仅取决于参数的估计,而且还受参数当前不确定性的影响。因此,控制算法通过同时执行两个功能来表达其双重性质:参数的不间断估计和过程控制。 ABR源的允许信元速率由反馈消息根据ATM交换机输出缓冲区中的瞬时队列大小动态调整。与ERICA和BECN方案相比,通过仿真测试评估了ASRA方案。测试的需求包括:利用率,排队延迟,排队延迟差异和队列大小。仿真研究的结果表明,ASRA方案可以提供更高优先级的VBR流量,同时保留几乎相同的平均利用率,相当短的平均队列长度,平均排队延迟,尤其是ATM交换机输出缓冲区中的排队延迟差异。展示了ASRA方案在最大-最小意义上的公平性以及快速的瞬态响应。

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