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...

Congestion control is surely a mean to enhance network performances. Active queue management (AQM), which is a proactive approach, has been proposed as a solution to these problems [1]. One of the most well-known AQM policies is random early detection (RED). Although RED is an effective TCP congestion control [2], it can induce network instability and major traffic disruption if not properly co...

The focus of this work is to study the behaviors of varies queue managements, including RED (Random Early Detection), SRED (Stabilized-RED), and BLUE. The performance metrics of the comparison are queue size, the drop probability, and link utilization. The simulation is done using NS-2. The results of this work shows that different from the RED, SRED and BLUE, which use the available queue leng...

This paper introduces the procedure for an analytical derivation of the drop probability function for the Random Early Detection queue management mechanism. The procedure is based on a model of the TCP window system and the establishment for a criterion for system stability with methods of control theory. The term stability refers to the oscillation amplitude of the steady state queue size. The...

In this paper, we model DCCP congestion control mechanism and RED as independent discrete-time systems using fluid-flow approximation. By interconnecting DCCP connections and RED routers, we model the entire network as a feedback system called DCCP/RED. We then analyze the steady state performance and the transient state performance of DCCP/RED. Specifically, we derive the packet transmission r...

Congestion control mechanisms play a important role in today’s Internet, since network environments are geting more and more complicated. Besides, new applications request diverse services delivered by the network. Random Early Detection (RED) provides an efficient and low-overhead mechanism to effectively control congestion. Nevertheless, RED would slow down TCP senders’ reaction to change of ...

In recent years, AQM (Active Queue Management) mechanisms, which support the end-to-end congestion control mechanism of TCP (Transmission Control Protocol), have been widely studied. The AQM mechanism is a congestion control mechanism at a router to control its queue length by actively discarding arriving packets. Many AQM mechanisms such as RED (Random Early Detection) have been proposed. Howe...

With the growth of internet, the user’s requirements in terms of scale, functionality of network and performance of internet also increases. It becomes very important to guarantee the efficiency, stability and performance of a given network as per the user’s requirements. There are many management techniques that need to be taken care of, so as to ensure network stability. These include queue m...

The explosive increase in Internet traffic has placed a growing emphasis on congestion control and fairness in Internet routers. Approaches to the problem of congestion, such as active queue management schemes like Random Early Detection (RED) that are successful with TCP flows, use congestion avoidance techniques. Approaches to the problem of fairness, such as Fair Random Early Drop (FRED), pu...

The explosive increase in the volume and variety of Internet traffic has placed a growing emphasis on congestion control and fairness in Internet routers. Approaches to the problem of congestion, such as active queue management schemes like Random Early Detection (RED) use congestion avoidance techniques and are successful with TCP flows. Approaches to the problem of fairness, such as Fair Rand...