Efficient estimation of cell loss probability in atm multiplexers with a fuzzy logic system

doi:10.1109/icbc.1996.887803

Cited by 3 publications

References 7 publications

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Estimation of the cell loss ratio in ATM networks with a fuzzy system and application to measurement-based call admission control

Bensaou

Lam

Chu

et al. 1997

IEEE/ACM Trans. Networking

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| An important parameter in ATM-based network design and management is the cell loss ratio (CLR) in ATM multiplexers. It is a key parameter to many vital functions in the network such as call admission control, bandwidth allocation, etc. However, the CLR depends usually on many unknown and unpredictable tra c parameters such a s input tra c correlations. In this paper, we propose a simple and robust fuzzy-based algorithm to predict the CLR in large-sized systems based on both a small amount of information from small-sized systems, and the asymptotic behavior for very large systems. Unlike the model-based approaches, our approximation avoids the problem of assuming any tra c parameters or arrival process. This algorithm is used with real-time tra c measurement to propose an e ective measurement-based call admission control framework for ATM networks. Keywords| A TM, cell loss ratio, fuzzy logic, call admission control.

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Estimation of the cell loss ratio in ATM networks with a fuzzy system and application to measurement-based call admission control

Bensaou

Lam

Chu

et al. 1997

IEEE/ACM Trans. Networking

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Fuzzy-based rate control for real-time MPEG video

Tsang

Bensaou

Lam

1998

IEEE Trans. Fuzzy Syst.

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this paper, we propose a fuzzy logic based control scheme for real time MPEG video to avoid long delay or excessive loss at the user-network interface (UNI) in an ATM network. The system consists of a shaper whose role is to smooth the MPEG output tra c to reduce the burstiness of the video stream. The input and output rates of the shaper bu er are controlled by two fuzzy logic based controllers. To avoid a long delay at the shaper, the rst controller aims to tune the output rate of the shaper based on the number of available transmission credits at the UNI and the occupancy of the shaper's bu er in the video frame timescale. Based on the average occupancy of the shaper's bu er and its variance, the second controller tunes the input rate to the shaper over a much larger timescale by applying a closed loop MPEG encoding scheme. With this approach, the tra c enters the network at an almost constant bit rate (with a very small variation) allowing simple network management functions such as admission control and bandwidth allocation, while guaranteeing a relatively constant video quality since the encoding rate is changed only in critical periods when the shaper bu er \threatens" to over ow. The performance of the proposed scheme is evaluated through numerical tests on real video sequences. Keywords| Tra c shaping, Fuzzy control, Asynchronous transfer mode, MPEG real time video.

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Dynamic bandwidth allocation for real-time VBR video traffic in ATM networks

Chu

Tsang²

Proceedings of Sixth International Conference on Computer Communications and Networks

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Efficient estimation of cell loss probability in atm multiplexers with a fuzzy logic system

Cited by 3 publications

References 7 publications

Estimation of the cell loss ratio in ATM networks with a fuzzy system and application to measurement-based call admission control

Estimation of the cell loss ratio in ATM networks with a fuzzy system and application to measurement-based call admission control

Fuzzy-based rate control for real-time MPEG video

Dynamic bandwidth allocation for real-time VBR video traffic in ATM networks

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