The aim of this paper is to discuss the use of gain scheduling to improve the performance of classical AQM controllers. We show that by using gain scheduling it is possible to synthesize controllers able to better cope with unwanted variations of the network operating regime; for example variations of the round-trip time, the load or the buffer capacities. Simulations are provided to compare th...

Active Queue Management (AQM) has been extensively studied in the context of wired Internet. In this paper, we propose an AQM algorithm for a bottleneck node with wireless link. Specifically, we propose a robust controller design method that maintains the queue length close to an operating point. We treat capacity variation as an external disturbance and design the controller using H∞ control t...

We propose an “answerer in questioner’s mind” (AQM) framework, a novel approach for goal-oriented dialogue. In AQM, a questioner asks and infers based on an approximated probabilistic model of the answerer in the questioner’s model. The questioner figures out the answerer’s intent by selecting a plausible question following the principle of information theory, which explicitly calculates the in...

In today’s world, nothing seems to be impossible, due to the astonishing advancements in science and technology. Now days, many humans are dependent on internet for their daily chores. But, congestion is one of the major issues, which affects the performance of such data networks. Thus, in order to control congestion, various schemes have been developed. In this research paper, the active queue...

Queueing systems in which an arriving job is blocked and lost with a probability that depends on the queue size are studied. The study is motivated by the popularity of Active Queue Management (AQM) algorithms proposed for packet queueing in Internet routers. AQM algorithms often exploit the idea of queue-size based packet dropping. The main results include analytical solutions for queue size d...

This paper investigates the implementation of a class of active queue management algorithms (AQM) whose measure of congestion includes packet arrival rate, such as REM and GREEN, in a combined input and output queued (CIOQ) switch. We propose a structure with one AQM per output port and we analyze the constraints on the switch fabric speed that this imposes. A two queue model of a CIOQ switch i...

Based on the proportionally fair scheme that Kelly proposed to solve the optimization problems for utility function in networks, and in order to improve the congestion control performance for the queue in router, the linear and terminal sliding active queue management (AQM) algorithms are designed. Especially in the terminal sliding AQM algorithm, a special nonlinear terminal sliding surface is...

Loss differentiation is recommended as a service differentiation provided by an Assured Forwarding (AF) Per-Hop Behavior (PHB) in Differentiated Service (DiffServ) architecture. An Active Queue Management (AQM) technique is addressed as a suitable alternative to realize the service differentiation because the AF PHB should attempt to minimize longterm congestion while permitting short-term cong...

The paper considers the design of robust AQM for the congestion problem of a router. Using a state space representation of a linearized fluid model of TCP, we provide an AQM which stabilises the queue length of the buffer for any delay less than a prescribed upper bound. Our results rely on the use of recently developed Lyapunov-Krasovskii functional and have been expressed in terms of Linear M...