The Internet routers employing the random early detection (RED) algorithm for congestion control suffer from the problem of chaotic queue oscillation. It is well known that the slowly varying nature of the average queue size computed using an exponentially weighted moving average (EWMA) used in the RED scheme causes this chaotic behavior. This paper presents a new mathematical function to model...

Resource Allocation in Grid environments to date is generally carried out under the assumption that there is one primary scheduling system scheduling jobs. However, as environments tend towards larger open “utility” Grids it becomes increasingly likely that deployments will involve multiple independent schedulers allocating jobs over the same resources. In this paper we show that, if using curr...

In this paper, we propose an efficient control scheme for active queue management (AQM) supporting TCP flows. The proposed controller consists of two parts: a rate controller and a queue size controller. The rate controller is a proportional-integral (PI) controller, which improves the response to dynamic traffic variation and keeps the packet arrival rate around the link capacity. The queue si...

Nowadays, application on Video transmission on Internet tends to be challenging in meeting the end users’ demand. There have been numerous researches on improving video transmission quality when network congestion occurs. In this paper, we propose a control mechanism of the packets mark (drop) in the Random Early Detection (RED) active queue management. To enhance the quality of video transmiss...

Much attention has recently been given to the Differentiated Services (Diffserv) approach to provide Quality of Service for IP networks. This packet-marking based approach to IP QoS is attractive due to its simplicity and ability to scale. Two of the most popular services proposed for the Diffserv approach are the Assured and Premium Services. In this work, prototypical implementations of Diffs...

Broadband satellite-based IP networks have been considered as the technology to enable a strong and promising next-generation market. In satellite communication systems, the channel performance might be severely degraded due to the dynamic weather conditions such as the precipitation, and thereby lead to network congestion. Therefore, congestion control is critical in such networks to satisfy Q...

Early detection of basal stem rot (BSR) disease in oil palm trees is important for the sustainable production limited land plantation Southeast Asia. However, previous studies based on satellite and aircraft hyperspectral remote sensing could not discriminate early-stage BSR from healthy or late-stage trees. In this study, imaging an unmanned aerial vehicle (UAV) machine learning using a random...

In this report we use a previously developed nonlinear dynamic model of TCP to analyze and design Active Queue Management (AQM) Control Systems using RED. First, we linearize the interconnection of TCP and a bottlenecked queue and discuss its feedback properties in terms of network parameters such as link capacity, load and round-trip time. Using this model, we next design an AQM control system...

Wireless access points act as bridges between wireless and wired networks. Since the actually available bandwidth in wireless networks is much smaller than that in wired networks, there is a bandwidth disparity in channel capacity which makes the access point a significant network congestion point. The recently proposed active queue management (AQM) is an effective method used in wired network ...

The random early detection (RED) technique has seen a lot of research over the years. However, the functional relationship between RED performance and its parameters viz., queue weight (wq), marking probability (maxp), minimum threshold (minth) and maximum threshold (maxth) is not analytically available. Moreover, the precise dependence between the RED average queue length and its parameters is...