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High-performance frame communication networks including VDSL have been conceived to carry traffic sources and support a continuum of transport rates ranging from low bit-rate to high bit-rate traffic. As a number of telecommunications traffic (bursty traffic) fluctuates on a certain network it results in congestion. The traditional policing mechanisms are finite-sized buffers with queue management techniques and fixed leak rate. Most queue management schemes employ fixed thresholds or a limited number of arrival frames, to determine when to allow or discard the entry of frames. However, traditional policing mechanisms have proved to be inefficient in coping with the conflicting requirements of ideal policing mechanisms, that is, low dropping frames and high conforming frames. An alternative solution based on artificial intelligence techniques, specifically, in the field of fuzzy systems is introduced. In this paper, a fuzzy control queue leak rate (QLR) of the buffer prior to policing mechanism is investigated. The performance of this alternative method is then compared with traditional policing mechanisms. Simulation results show that over VDSL network, the fuzzy control scheme helps improve performance of QLR in policing mechanisms. The performance of proposed method is much better than traditional policing ones.

SCHEDULING AND QOS FOR LEAK RATE IN POLICING MECHANISMS OVER TELECOMMUNICATIONS NETWORK