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An Adaptive Control Design for ABR Service in ATM Networks
Thang Viet NGUYEN Takehiro MORI Yoshihiro MORI Yasuaki KUROE
Publication
IEICE TRANSACTIONS on Communications
Vol.E88-B
No.7
pp.2896-2907 Publication Date: 2005/07/01 Online ISSN:
DOI: 10.1093/ietcom/e88-b.7.2896 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Network Management/Operation Keyword: asynchronous transfer mode (ATM), available bit rate (ABR), congestion control, adaptive control, unknown time-varying delays, queue control,
Full Text: PDF(682.7KB)>>
Summary:
This paper presents an adaptive control design for the ABR traffic congestion control in ATM networks. Firstly, we consider a control-based mathematical model to the ABR traffic congestion control problem. Then the feedback pole placement control design is applied to the ATM ABR traffic congestion control problem for the case of known delays. Finally, by using the online plant parameter estimation algorithm and modifying the controller parameters adaptively in real time, a method to treat the case of unknown time-varying delays is proposed. Several design modifications are introduced to solve practical control issues such as bounded command rate constraint, output buffer saturation and bounded values to the plant parameter estimation algorithm. Simulations are implemented to verify the proposed control design. It is shown that while considering these practical control issues, the control method satisfies the requirements of fairness to users, network efficiency, unknown time-varying delays, queue length control and good convergence performance at an acceptable computation effort.
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