This paper presents a new active queue management (AQM) scheme, Fuzzy Explicit Marking (FEM), supporting explicit congestion notification (ECN), to provide congestion control in TCP/IP best-effort networks using a fuzzy logic control approach. While many AQM mechanisms have recently been proposed, these require careful configuration of non-intuitive control parameters, and show weaknesses to de...

In this paper, a Scalable Proportional Integral (SPI) active queue management (AQM) algorithm for High Speed TCP (HSTCP) is proposed. Based on the linearization model for HSTCP, we give a stability analysis for the closed loop interconnection systems (HSTCP and SPI AQM). Then, an adaptive parameters setting method for SPI AQM is presented. Using ns2 simulation, we illustrate that SPI shows sati...

In the current Internet, long-term TCP flows and bursty shortterm flows both exist. The mix between the aggregated longterm TCP traffic (responsive traffic) and the bursty traffic (non-responsive traffic) has great impact on the performance of Active Queue Management (AQM) algorithms in routers. We introduce a new solution to differentiate between responsive and unresponsive traffic in AQM queu...

We introduce a novel and robust active queue management (AQM) scheme based on a fuzzy controller, called hybrid fuzzy-PID controller. In the TCP network, AQM is important to regulate the queue length by passing or dropping the packets at the intermediate routers. RED, PI, and PID algorithms have been used for AQM. But these algorithms show weaknesses in the detection and control of congestion u...

This paper presents a new active queue management (AQM) scheme -Fuzzy Explicit Marking (FEM)supporting explicit congestion notification (ECN), to provide congestion control in TCP/IP besteffort networks using a fuzzy logic control approach. While many AQM mechanisms have recently been proposed, these require careful configuration of nonintuitive control parameters, and show weaknesses to detect...

In this paper, we propose a uni ed mathematical framework based on receding horizon control for analyzing and designing AQM (Active Queue Management) algorithms in stabilizing TCP (Transfer Control Protocol). The proposed framework is based on a dynamical system of the given TCP and a linear quadratic cost on transients in queue length and ow rates. We derive the optimal receding horizon AQMs (...

Generic generalized minimum variance-based (GMV) controllers have been adopted as efficient control mechanisms especially in presence of measurement noise. However, such controllers exhibit degraded performance with change in process dynamics. To overcome this problem, a novel congestion controller based on active queue management (AQM) strategy for dynamically varying TCP/AQM networks known as...

Abstract: We propose a wavelet neural network (WNN) control method for active queue management (AQM) in an end-to-end TCP network, which is trained by adaptive learning rates (ALRs). In the TCP network, AQM is important to regulate the queue length by passing or dropping the packets at the intermediate routers. RED, PI, and PID algorithms have been used for AQM. But these algorithms show weakne...

AKIN, OZDEMIR. Active Queue Management and Scheduling Methods for Packet-Switched Networks (under the supervision of Dr. J. Keith Townsend) To support the myriad of envisioned communication products of the future, there is a need to develop a network infrastructure that can provide larger bandwidth, with better control of quality of service (QoS). However, with increasing demand for application...

Active Queue Management (AQM) tries to find a delicate balance between two antagonistic Internet queuing requirements: First, buffer space should be maximized to accommodate the possibly huge transient bursts; second, buffer occupation should be minimum so as not to introduce unnecessary endto-end delays. Traditional AQM mechanisms have been built on heuristics to achieve this balance, and have...