We study the aggregated behaviour of the Transmission Control Protocol (TCP) with and without Explicit Congestion Notification (ECN) over a wide range of traffic conditions using different Active Queue Management (AQM) schemes. A new AQM scheme called Adaptive Rate-Queue Utilisation AQM (ARQUA) which attempts to provide high throughput while maintaining a target delay is proposed. We demonstrat...

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...

This work documents the implementation of the BLUE Active Queue Management algorithm for the Linux Operating System and its evaluation by measurements. The issues of Active Queue Management (AQM), and the search for the most adequate AQM algorithms are important in these days because of the changing traffic dynamics – mostly congestion – on the Internet, and the rising quality expectations held...

We investigate the interaction between Transmission Control Protocol (TCP) and an Active Queue Management (AQM) router, that are designed to control congestion in the Internet. TCP controls the sending rate with which the data is injected into the network and AQM generates control signals based on the congestion level. For a given TCP version, we define the optimal strategy for the AQM router a...

Abstract— The internet and its applications are an integral part of our daily life. Today’s Internet needs to provide Best Effort Service. With the rapid transformation of the Internet into a commercial infrastructure, demands for quality of service have rapidly developed. Traffic is processed as quickly as possible, but there is no guarantee of timelines or actual delivery. The people of the m...

In this paper, a design problem of congestion controllers is discussed for TCP/AQM(Transmission Control Protocol/Active Queue Management) networks. The proposed method consists of two control techniques. First one is based on a gain-scheduling technique considering nonlinearities of TCP/AQM networks. But the designed congestion controller is a state feedback controller and it is impossible to e...

Active Queue Management (AQM) schemes, such as PIE [1] and RED [2], have been particularly effective in combating bufferbloat and attenuating network congestion. Despite their widespread success and improved performance over traditional Tail Drop queuing schemes, the extent of AQM deployment in contemporary networks is not known [3]. Detecting the presence of AQMs in a network has potential to ...

Jumbo frame is as an approach that allows for higher utilization of larger packet sizes on a domain-wise basis, decreasing the number of packets processed by core routers while not having any adverse impact on the link utilization of fairness. The major problem faced by jumbo frame networks is packet loss during queue congestion inside routers is as the RED mechanism that is recommended to comb...

As multimediaand group-oriented computing becomes increasingly popular for the users of wireless mobile networks, the importance of features like quality of service (QoS) and multicasting support grows. Ad hoc networks can provide users with the mobility they demand, if efficient QoS multicasting strategies are developed. The ad hoc QoS multicasting (AQM) protocol achieves multicasting efficien...

Active Queue Management (AQM) takes a trade-off between link utilization and delay experienced by data packets. From control point of view, it is rational to regard AQM as a typical regulation system. In this paper, two types of controllers, i.e. Sliding Mode Variable Structure (SMVS) controller and optimal Linear Quadratic Regulator (LQR) are designed for AQM. Simulation results conform the ro...