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...

In recent years, AQM (Active Queue Management) mechanisms, which support the end-to-end congestion control mechanism of TCP by performing congestion control at a router, have been actively studied by many researchers. AQM mechanisms usually have several control parameters, and their effectiveness depends on a setting of those control parameters. Therefore, issues on parameter tuning of several ...

In a packet-switched network, a feedback-based congestion control mechanism is essential to provide data transfer services efficiently. Its main objective is to prevent packet losses in the network, and to utilize network resources effectively. The current Internet uses a windowbased flow control mechanism in its TCP (Transmission Control Protocol), as the feedback-based congestion control mech...

In this paper, we propose a novel proportional-differential-type feedback controller called Novel-PD as new active queue management (AQM) to regulate the queue length with small oscillation. It measures the current queue length and uses the current queue length and differential error signals to adjust packet drop probability dynamically. We provide control theoretic analysis of system stability...

Internet traffic congestion control using queue thresholds is a well known and effective mechanism. This motivates the stochastic analysis of a discrete-time queueing systems for the performance evaluation of the active queue management (AQM) based congestion control mechanism called Random Early Detection (RED) with bursty and correlated traffic using a two-state Markov-Modulated Bernoulli arr...

The channel throughput for a finite number of packet broadcasting users is analyzed for random access protocols, including slotted persistent carrier sense multiple access (CSMA) with and without collision detection and unslotted persistent CSMA with and without collision detection. We consider both pand 1-persistent CSMA. Our results can be extended to infinite population cases (by taking the ...

This paper presents a simulation study of router mechanisms to provide differentiated levels of service to traffic with diverse performance requirements in IP networks. The paper focuses on queue management mechanisms and on Quality of Service routing. The performance of the Random Early detection dropper associated with the Weighted Round Robin scheduling discipline is compared with the Dynami...

Random Early Detection (RED) is used as a congestion avoidance mechanism in a router wherein the average queue size is compared to the minimum and maximum thresholds of the buffer. Packets are dropped, marked, or allowed to pass depending on the size of the queue relative to the thresholds. While RED may be suitable for flows which have similar loss requirements, it remains to be seen if it can...

539 Abstract— In this paper, a parameter optimization method of RIO-DC (RED (Random Early Detection) with In and Out-De-Coupled Queues) scheme for Assured Service (AS) in Differentiated Services (DiffServ) is proposed. In order to optimize QoS (Quality of Service) performance of the RIO-DC policy for AS in terms of maximum tolerable latency, link utilization, fairness, etc., we should design ro...

This paper describes six methods for controlling congestion for TCP connections. The first four, Slow Start algorithm [5], Tri-S [8], DUAL [7], and TCP Vegas [1] treat the network as a black box, in that the only way to detect congestion is through packet loss and changes in round trip time, or throughput. The last two, Random Early Detection [4] and Explicit Congestion Notification [3] depend ...