FUZZY CONTROL OF MULTIRATE TRAFFIC IN MULTIMEDIA CELL-BASED NETWORKS

In this paper, an intelligent scheme for controlling the QoS in multim edia, multi-rate networks is presented. The scheme implements a dynami c control mechanism, based on buffers with vaguely defined thresholds represented with fuzzy sets. This approach guarantees the QoS of real- time traffic and delivers non,realtime traffic at acceptable performan ce levels. The fuzzy mechanism, based on the principles of fuzzy contr ol, dynamically responds to the alternating traffic patterns at the ac cess node using a set of fuzzy control rules. The fuzzy control rules are carefully formulated to reduce the starvation of non-realtime traf fic which is usually assigned a low priority. We also show in this pap er how the proposed schemes offer an improved performance over other a ccess control mechanisms such as moving boundaries and other static pr iority strategies.