Abstract Connection admission control of ATM network using integrated MLP and fuzzy control.pdf

Connection admission control of ATM network using integrated MLP and fuzzy controllers Nelson O.L. Ng *, C.K. Tham Department of Electrical Engineering, National University of Singapore, Singapore 119260, Singapore Abstract This paper presents a new approach to the problem of call admission control (CAC) of variable bit rate (VBR) tra?c in an asynchronous transfer mode (ATM) network. Our approach employs an integrated neural network and fuzzy controller to implement the CAC controller. This scheme capitalizes on the learning ability of a neural network and the robustness of a fuzzy controller. Experiments show that this scheme is able to achieve high throughput and low cell loss while achieving fairness among di?erent classes of VBR tra?c. For comparison, we have also implemented four other CAC schemes: (1) peak bandwidth method, (2) equivalent bandwidth method, (3) average bandwidth method and (4) neural network quality of service (QoS) predictor. Results of these experiments are presented in this paper. ó 2000 Elsevier Science B.V. All rights reserved. Keywords: ATM; Call admission control; Neural network; Fuzzy control 1. Introduction Asynchronous transfer mode (ATM) is a high-speed packet switching technology for the broadband integrated services digital network (B-ISDN), in which various kinds of communica- tion services, such as voice, video and data are transferred over high-speed links [1]. This tech- nology has gained acceptance as the backbone high-speed network of the future, as well as the lower bandwidth link to homes and desktops for interactive multimedia services. ATM supports di?erent service classes, such as constant bit rate (CBR), variable bit rate (VBR), unspeci?ed bit rate (UBR) and available bit rate (ABR). Due to the diverse mix of tra?c types and ser- vice requirements, resource allocation in B-ISDN must be related both to the tra?c parameters and the quality of service (QoS) negotiated between the user and the network at the establishment o