PERFORMANCE ANALYSIS OF LEAKY BUCKET SCHEMES AGAINST A SIMPLIFIED FUZZY BASED APPROACH

Abstract

The emerging advanced Telecommunication network, based on asynchronous transfer mode (ATM) concepts is anticipated to support mixed types of traffic (data, voice, video etc.) each with unique performance requirements. However, while striving for this goal, one has to accept congestion as an unavoidable nuisance. The problem arises because of bursty and delay sensitive nature of the real time traffic such as voice. This complicates any attempt to formulate a classical control theory model, which captures, all the important characteristics of voice cells. This 9 -t investigates a Leaky Bucket (LB) scheme with and without threshold in the data buffer and also suggests a fuzzy logic based controller for managing cells generated by the voice sources in ATM networks. The fuzzy control approach presented in this overcomes the limitation of burstiness of traffic source by appealing to the linguistic ability of fuzzy set theory and logic to handle the complexity, hence it is an improved and intelligent implementation of the leaky bucket cell rate control mechanism.