This paper proposes an adaptive variant of Random Early Detection (RED) gateway queue management for packet-switched networks via a discrete state analog of the non-stationary Master Equation i.e. Markov process. The computation of average queue size, which appeared in the original RED algorithm, is altered by introducing a probability P (l, t), which defines the probability of having l number ...

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...

There are many factors, which are important in the evolution of wines during aging in bottle. Whilst it is accepted that the interaction of limited amounts of oxygen with bottled wine (via closure ingress) will not benefit white wine, it is widely held that limited amounts of oxygen will benefit robust red wines. As consumer acceptance continues of many different forms of wine bottle closures, ...

background colorectal cancer (crc) is the third most common cancer in iran and its early detection is necessary. this study is based on perception of people in the east of iran toward crc screening.   methods in a cross-sectional study, 1060 randomly selected individuals who referred to razavi hospital of mashhad, iran, between september the 1st, 2012 and february the 28th, 2013 as patients or ...

Successful cervical cancer prevention depends on reaching, screening and treating women with pre-invasive disease. We aimed to evaluate the effectiveness of two media interventions-a photo-comic and a radio-drama-in increasing cervical screening uptake. A randomized controlled trial compared a photo-comic on cervical cancer screening with a placebo comic. One month after the comics were distrib...

Congestion is one of the major problems in today’s internet. So for managing traffic and to keep the network stable, Congestion Control algorithms are used. Queuing is one of the important method in traffic management system. This paper gives a comparative analysis of three queuing mechanisms Droptail, Random Early Detection and Non Linear Random Early Detection on the basis of various performa...

Abstract: A novel active queue management(AQM) scheme is proposed to deal with the performance degradation of TCP in wireless scenario. One of the key sources causing performance degradation is the high bit error rate(BER), which is an intrinsic link characteristic of wireless network. A high-gain observer is constructed to estimate the effect of bit error of source data. With the estimated BER...

The Random Early Detection algorithm is considered as a promising algorithm for Differentiated Services to cope with feedback oriented traffic like TCP. In this paper, we model the salient features of TCP and RED and evaluate the model using a discrete-time analysis. The novelty of our investigation is the analytic approach to the composed model, i.e., TCP feedback traffic over a RED queue. Der...

We consider the adaptation of random early detection (RED) as an active queue management algorithm for TCP traffic in Internet gateways where different maximum transfer units (MTUs) are used. We studied the two RED variants described in [1] and point out a weakness in both. The first variant where the drop probability is independent from the packet size discriminates connections with smaller MT...

In active queue management (AQM), core routers signal transmission control protocol (TCP) sources with the objective of managing queue utilization and delay. It is essentially a feedback control problem. Based on a recently developed dynamic model of TCPs congestion-avoidance mode, this paper does three things. First, it relates key network parameters such as the number of TCP sessions, link ca...