Recently, several router-based congestion control mechanisms have been proposed to support an end-to-end congestion control mechanism of TCP (Transmission Control Protocol). In this paper, we focus on a RED (Random Early Detection) router, which is one of promising router-based congestion control mechanisms. The RED router randomly drops the arriving packet by alignment probability to an averag...

Active Queue Management (AQM) schemes aim to stabilize router queue sizes and provide better fairness among a set of TCP connections. Random Early Detection (RED) is one of the first and well-known AQM schemes. Explicit Congestion Notification (ECN) is a modified version of RED in that it notifies a sender about congestion, instead of dropping its packet. Under such AQM schemes, TCP connections...

background :breast cancer is the most common cancer among females that will cause death ifit does not be recognized and cured. one out of eight iranian women in 40-55years old is likely to develop breast cancer. early detection of breast cancerby screening programs is a useful approach in controlling the disease. methods :in this descriptive study, 196 female healthcare providers were selected ...

in this paper, a new method is presented for the detection of defects in random textures. in the training stage, the feature vectors of the normal textures’ images are extracted by using the optimal response of gabor wavelet filters, and their probability density is estimated by means of the gaussian mixture model (gmm). in the testing stage, similar to the previous stage,at  first, the feature...

Active queue management (AQM) policies are those policies of router queue management that allow for the detection of network congestion, the notification of such occurrences to the hosts on the network borders, and the adoption of a suitable control policy. This paper proposes the adoption of a fuzzy proportional integral (FPI) controller as an active queue manager for Internet routers. The ana...

Active Queue Management (AQM) policies are those policies of router queue management that allow the detection of network congestion, the notification of such occurrences to the hosts on the network borders, and the adoption of a suitable control policy. This paper proposes the adoption of a Fuzzy Proportional Integral (FPI) controller as an active queue manager for Internet routers. The analyti...

ensuring optimal performance in next-generation routers. Active Queue Management (AQM) scheme, has been advocated by the Internet research community for next generation Random Early Detection (RED) is most well-known AQM scheme. However, RED lacks self-adaptation mechanism and it susceptible to parametrization problem. Several variants of were developed, however all them possess a static drop p...

Distributed Denial of Service (DDoS) attack is one of the biggest threats now days. This paper aims at providing the simulation results of buffer size and attack intensities effect on various queuing algorithms such as DropTail, Fair Queuing (FQ), Stochastic Fair Queuing (SFQ), Deficit Round Robin (DRR) and Random Early Detection (RED) using ns-2 as a simulation environment. The results in this...