The Transmission Control Protocol (TCP) is the most widely used transport protocol in the Internet. TCP is a reliable transport protocol that is tuned to perform well in wired networks where packet losses are mainly due to congestion. Wireless channels are characterized by losses due to transmission errors and handoffs. TCP interprets these losses as congestion and invokes congestion control mechanisms resulting in degradation of performance. TCP is usually layered over the Internet protocol (lP) at the network layer. JP is not reliable and does not provide for any Quality of Service (QoS). The Internet Engineering Task Force (IETF) has provided two techniques for providing QoS in the Internet. These include Integrated Services (lntServ) and Differentiated Services (DiffServ). IntServ provides flow based quality of service and thus it is not scalable on connections with large flows. DiffServ has grown in popularity since it is scalable. A packet in a DiffServ domain is classified into a class of service according to its contract profile and treated differently by its class. To provide end-to-end QoS there is a strong interaction between the transport protocol and the network protocol. In this dissertation we consider the performance of the TCP over a wireless channel. We study whether the current TCP protocols can deliver the desired quality of service faced with the challenges they have on wireless channel. The dissertation discusses the methods of providing for QoS in the Internet. We derive an analytical model for TCP protocol. It is extended to cater for the wireless channel and then further differentiated services. The model is shown to be accurate when compared to simulation. We then conclude by deducing to what degree you can provide the desired QoS with TCP on a wireless channel. / Thesis (M.Sc.Eng.)-University of Natal, Durban, 2001.

This thesis presents three main contributions that aim to improve the transport layer of the current networking architecture. The transport layer is nowadays dominated by the use of TCP and its congestion control. Recently new congestion control mechanisms have been proposed. Among them, TCP Friendly Hate Control (TFRC) appears to be one of the most complete. Nevertheless this congestion control mechanism, as with TCP, does not take into account either the evolution of the network in terms of Quality of Service and mobility or the evolution of the applications. The first contribution of this thesis is a specialisation of TFRC congestion control to provide a QoS-aware Transport Protocol specifically designed to operate over QoS-enabled networks with bandwidth guarantee mechanisms. This protocol combines a QoS-aware congestion control, which takes into account network-level bandwidth reservations, with full ordered reliability mechanism to provide a transport service similar to TCP. As a result, we obtain the guaranteed throughput at the application level where TCP fails. This protocol is t he first transport protocol compliant with bandwidth guaranteed networks. At the same time the set of network services expands, new technologies have been proposed and deployed at the physical layer. These new technologies are mainly characterised by communications done without wire constraint and the mobility of the end-systems. Furthermore, these technologies are usually deployed on entities where the CPU power and memory storage are limited. The second contribution of this thesis is therefore to propose an adaptation of TFHC to these entities. This is accomplished with the proposition of a new sender-based version of TFHC. This version has been implemented, evaluated and its numerous contributions and advantages compare to usual TFHC version have been demonstrated. Finally, we proposed an optimisation of actual implementations of TFHC. This optimisation first consists in the proposition of an algorithm based on a numerical analysis of the equation used in TFHC and the use of the Newton's algorithm. We furthermore give a first step, with the introduction of a new framework for TFRC, in order to better understand TFHC behaviour and to optimise the computation of the packet loss rate according to loss probability distributions.

Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.44-45).

Thesis (M. App. Sc.)--Carleton University, 2004. / Includes bibliographical references (p. 80-83). Also available in electronic format on the Internet.

Thesis (M.C.S.)--Carleton University, 2005. / Includes bibliographical references (p. 89-91). Also available in electronic format on the Internet.

Zugl.: Hamburg, Techn. Univ., Diss., 2008

Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 68-69). Also available on the Internet.

Thesis (M.S.)--University of Missouri-Columbia, 2004. / Typescript. Includes bibliographical references (leaves 68-69). Also available on the Internet.

Thesis (M.Sc. (Computer Science)) - Rhodes University, 2007.

The topic of Wi-Fi networks (Wireless Fidelity) is widely discussed currently as there is a big boom of this technology. The Wi-Fi refers to a method of modern technology that enables wireless transmission of data between devices such as printers and mobile phones. The main objectives of the thesis are focused on the development proposal to build a modern data network for an ISP (Internet Service Provider) in the technical area. Another aim was to process and analyze the results of the newly formed economic entity and their subsequent evaluation in recent years, i.e for the years 2008 - 2011. Business plan was designed in Branišov, which is a village near Czech Budejovice in 2001. Initially, it was the agreement of two local residents who believed that the offer of an Internet connection is not ideal for this location and started to develop some "small" wireless network. At the beginning, any professional equipment was not used in this network. When connected with an increasing number of customers (about five inhabitants of Branišov), professional antennas and access points began to be used. The above mentioned five customers manage to cover all operating costs created by the network. In subsequent years, i.e. 2004 ? 2007, there was a boom of the project. The number of connected users was growing constantly, even though not conducted any marketing or promotional activities. By the end of 2006, individual users began to demand greater guarantee of a stable connection. At the same time, it also proved to be absolutely necessary to establish a specific person responsible for the network. This person was supposed to maintain the network, develop it and manage it. In 2007, the initial non-commercial network was transformed into a commercial network model and brand new commercial entity ? a limited liability company ? was created. Currently, there is a continual development of this network, which already covers a total of 30 villages around České Budějovice and Vodňany and the signal spread through 115 broadcasting Access Points.