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| DOI： |
| Received:September 15, 2007 |
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| Binary ABR flow control over ATM networks with uncertainty using discrete-time variable structure controller |
| Ming YAN, Yuanwei JING |
| (School of Information Science and Engineering, Northeastern University, Shenyang Liaoning 110004, China) |
| Abstract: |
| A binary available bit rate (ABR) scheme based on discrete-time variable structure control (DVSC) theory is proposed to solve the problem of asynchronous transfer mode (ATM) networks congestion in this paper. A discretetime system model with uncertainty is introduced to depict the time-varying ATM networks. Based on the system model, an asymptotically stable sliding surface is designed by linear matrix inequality (LMI). In addition, a novel discrete-time reaching law that can obviously reduce chatter is also put forward. The proposed discrete-time variable structure controller can effectively constrain the oscillation of allowed cell rate (ACR) and the queue length in a router. Moreover, the controller is self-adaptive against the uncertainty in the system. Simulations are done in different scenarios. The results demonstrate that the controller has better stability and robustness than the traditional binary flow controller, so it is good for adequately exerting the simplicity of binary flow control mechanisms. |
| Key words: Binary ABR flow control ATM networks Discrete-time variable structure control Uncertainty Linear |
