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A computer network is basically the combination of computers and different type of devices that are interfaced by a range of resources i.e. communications channels that provide the communications between users and allow them ability of sharing the resources. Multicasting is used to send the information from one receiver to group of receivers. But it is faced big issue because of additional data demand...
The performance of Internet applications depends very much on the dynamics of TCP congestion window sizes. This paper presents a novel model of TCP congestion window sizes. In particular, we focus on the multiplicative-decrease phases of the TCP congestion window instead of additive-increase phases. With this focus, we derive a model and a novel solution for finding the distribution of TCP window...
Low Extra Delay Background Transport (LEDBAT) congestion control algorithm is designed to address the unfairness problem of TCP aggravated by applications that use multiple TCP connections for data transfer. LEDBAT operates under the assumption that the queue delay at the access router of the bottleneck link will be the primary varying contributor to end-to-end one-way delay. However this assumption...
With the popularization of Internet and formation of wireless technologies provide significant impact on Internet and Communication Technologies. These technologies have support of one of famous technique known as Adhoc Network. Adhoc Networks are assortment of mobile nodes connected by wireless links and also receiving attention in the scientific community. In adhoc networks, routes may be disconnected...
TCP is an important communication protocol as more and more multimedia technologies are deployed in the Internet nowadays. However, existing TCP control mechanism has some shortcomings in supporting real-time streaming traffic. Although UDP can be used as an alternative to transmit real-time application data, it lacks congestion control. Introducing a new TCP-friendly protocol that supports the multimedia...
The steadily growing importance of Internet-based applications and their resilience requirements lead to a rising number of multi-homed sites. The idea of Concurrent Multipath Transfer (CMT) is to exploit the existence of multiple paths among endpoints to increase application data throughput. However, handling the congestion control of each path independently lacks of fairness against non-CMT flows...
The traditional formulation of the total value of information transfer is a multi-commodity flow problem. Here, each data source is seen as generating a commodity along a fixed route, and the objective is to maximize the total system throughput under some concept of fairness, subject to capacity constraints of the links used. This problem is well studied under the framework of network utility maximization...
The advent of fourth generation technologies in wireless networks and the rapid growth of 3G have heralded an era that will require researchers to find reliable and easily implement-able solutions to the problem of poor TCP performance in the wireless environment. Since a large part of the Internet is TCP-based, solving this problem will be instrumental in determining if the move from wired to wireless...
Network usage of public communication networks such as Internet are unpredictable. TCPFriendness or similar criteria can become mandatory in future Internet transport protocols to prevent an Internet collapse produced by UDP based multimedia, teleoperation or NCS flows. Deadband sampling reduces the control data sent to the network, for an efficient use of the communication medium and minimizes time...
Transmission Control Protocol (TCP) is the most commonly used transport protocol on the Internet. All indications assure that it will be an integral part of the future internetworks. In this paper, we present how regular TCP which was designed for wired networks is not suitable for dynamic spectrum access networks. We develop an analytical model to estimate the TCP throughput of Dynamic spectrum access...
As bandwidth in the Internet continues to grow, there will be more and more long fat network pipes with abundant residual bandwidth. At the same time, there is also a gradual and steady increase in the deployment of Internet endpoints equipped with different variants of high speed TCP. In this work, we first illustrate drawbacks associated with two widely deployed high speed TCP variants, namely:...
Ubiquitous communication indeed requires a seamless networking deployment enable user access the Internet and receive particular service at anytime. However, the deployment of wireless device and service source for ubiquitous communication is a dynamic complex problem which a typical multiple objectives decision problem. In this research, a general model is proposed to deal with such ubiquitous networking...
Although there currently exists a number of Wireless Local Area Network based mesh network deployments most have been deployed to provide best effort broadband Internet access. Consequently, they cannot meet the requirements of network operators in order to utilise these networks to offer carrier grade services. The goal of providing carrier grade services over a wireless mesh infrastructure requires...
Fast-growing applications like streaming media make TCP a poor fit. Because the UDP protocol lacks congestion control, equation-based and AIMD-based congestion control schemes have been two promising alternative to TCP for real-time multimedia streaming over the Internet. Past studies have shown that they are able to maintain throughput smoothness and achieve reasonable fairness with competing TCP...
Web-based software systems access some resources while executing the requests of the clients, typically several requests arrive at the same time, thus, competitive situation is established for the resources. In case of modeling such situation queueing model-based approaches are widely recognized. In our work, novel models and algorithms have been proposed to model the queue limit performance factor...
TCP-friendly rate control(TFRC) is an equation-based congestion control mechanism that competes fairly with TCP but has a much lower throughput variation, which makes it a better choice for streaming over the Internet. It is known that in a mobile network environment, after a handover TFRC can overshoot or under utilize the new link if the conditions there differ from those of the old link. There...
Since TCP congestion control is ill-suited for high speed networks, designing a replacement for TCP has become a challenge. To address this problem, we extend the population ecology theory to design a novel congestion control algorithm. We treat the network flows as the species in nature, the throughput of the flows as the population number, and the bottleneck bandwidth as the food resources. Then...
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