| ATM网络ABR流量的比例与滞后-超前控制 |
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| 引用本文： | 姜鹏,钟宜生. ATM网络ABR流量的比例与滞后-超前控制[J]. 清华大学学报(自然科学版), 2006, 46(4): 480-483 |
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| 作者姓名： | 姜鹏 钟宜生 |
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| 作者单位： | 清华大学,自动化系,北京,100084;清华大学,自动化系,北京,100084 |
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| 摘 要： | 为了克服异步传输模式(ATM)网络不确定时延和饱和非线性的影响,基于比例控制和滞后超前控制方法研究可用比特率(ABR)服务流量控制器设计问题,给出了控制幅值约束和缓冲区容量约束下系统满足ABR流量控制要求的条件,提出了满足这些条件的比例控制器和滞后超前控制器的设计方法。该方法能使ABR流量控制系统在网络传输时延不确定时,有效控制网络中瓶颈节点缓冲区的队列长度,同时能够及时响应ABR可用带宽的变化,从而避免拥塞和丢包的发生,使链路带宽得以充分利用。
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| 关 键 词： | ATM网络 流量控制 饱和非线性 比例控制 滞后-超前控制 |
| 文章编号： | 1000-0054(2006)04-0480-04 |
| 修稿时间： | 2005-02-01 |
ABR flow control for asynchronous transfer ode networks using proportional and lag-lead controllers |
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| JIANG Peng,ZHONG Yisheng. ABR flow control for asynchronous transfer ode networks using proportional and lag-lead controllers[J]. Journal of Tsinghua University(Science and Technology), 2006, 46(4): 480-483 |
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| Authors: | JIANG Peng ZHONG Yisheng |
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| Abstract: | Available bit rate(ABR) flow control systems in asynchronous transfer mode(ATM) networks experienie uncertain delays and saturation nonlinear.An ABR flow controller was designed based on a proportional control scheme and a lag-lead control scheme.Sufficient conditions are given which guarantee that the ABR flow control requirements can be met with control amplitude limitations and buffer occupancy limitations.Design methods for the proportional controller and the laglead controller were developed to satisfy the sufficient conditions.The resulting ABR flow control system effectively controls the buffer level of the bottleneck node and quickly responds to variations of the ABR bandwidth for uncertain transmission delays,so congestion and packet loss are avoided and the network utilization is improved. |
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| Keywords: | ATM networks flow control saturation nonlinear proportional controller lead-lag controller |
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