An efficient fuzzy system for traffic management in high-speed packet-switched networks

Abstract

In this paper we present a novel buffer management scheme based on fuzzy logic. We deal with the problem of managing traf®c¯ows with different priorities within the same buffer. The aim is to guarantee the QoS of high-priority traf®c, and at the same time exploit unused buffer resources to accommodate best-effort traf®c in order to maximize the total throughput. The scheme we propose can be applied both to ATM and IP networks. The performance evaluation of the fuzzy priority control scheme shows that it outperforms any static threshold mechanism and, as far as the total throughput is concerned, it is very close to that of the push out mechanism considered in literature as an ideal mechanism. Finally, we address some implementation issues of the control system and propose the design of a new cost-effective VLSI fuzzy processor.

An integrated fuzzy-GA approach for buffer management

“…The rules can be derived from experience, formalizing principles of approximate reasoning. Another important element which is fundamental in our case, is that the fuzzy systems derived are simple to implement, as has been widely demonstrated [8], [9].…”

“…Assuming the latencies indicated in Table IV to be reduced by a factor of , different improvements in the value would be obtained for PO and FT and DT. For PO scheme would increase by a factor of [see (8)], while for FT and DT mechanisms would increase by a factor of [see (9)]. Table V gives the values for the three control mechanisms when .…”

“…As they introduce no control overhead, the constraint to be met in the worst case is (9) Using the same data as in the previous case, we get for the FT or DT schemes, i.e., a switch size that is an order of magnitude greater than the size achievable using the PO scheme.…”