An Adaptive Fuzzy Control Double Leaky Bucket Using Backoff Time and Backpressure in Policing Mechanism Schemes over VDSL Network
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Abstract
When congestion occurs in VDSL networks, it will drop incoming frames because the buffer fills up frames until it over°ows. In backpressure algorithm suitable for low traffic [1], it prevents buffer overflows. In backo® time in leaky bucket over traffic policing mechanism suitable for high traffic [2], Backoff time computations are wildly used in order to avoid the impact on the network performance. In this paper, we propose a fuzzy control double leaky bucket using backpressure and backoff time detects violations in parameter negotiation. We evaluate and compare the performance of a fuzzy control backpressure and backo® time in double-leaky bucket as a policing mechanism (FBBD), a leaky bucket (LB), a jumping window (JW), a triggered jumping window (TJW) and a double-leaky bucket (DLB). The performance of fuzzy control backpressure and backo® time in double-leaky bucket was investigated through fluctuations in telecommunications traffic streams (burst/silent type). Simulation results show that in VDSL frames, the fuzzy logic control system helps improve the performance of our fuzzy control double-leaky bucket using backpressure and backoff time schemes as a policing mechanism much better than conventional policing mechanism by about 25 % in terms of conforming and non-conforming frames once various types of burst/silence traffic are generated.
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