Abstract
The growth in users streaming videos on the Internet has led to increased demand for improved video quality and reception. In next generation networks (NGNs), such as 3G and 4G LTE, quality of service (QoS) implementation is one of the ways in which good video quality and good video reception can be achieved. QoS mainly involves following an industry-wide set of standard metrics and mechanisms to achieve high-quality network performance in respect of video streaming. Adopting routing and communication protocols is one way QoS is implemented in NGNs. This article describes QoS of bit rate video streaming, and QoS performance analysis of video streaming, in relation to the main network transport protocols, namely transmission control protocol (TCP) and user datagram protocol (UDP). A simulation test bed was set up using OPNET modeller 14.5. In this setup, a network topology was created and duplicated three times, in order to configure two simulation scenarios (each using the distinct protocols), and a third simulation scenario using both protocols in hybrid form. The findings in the simulations indicated that, when a network is configured with both TCP and UDP protocols in video streaming, there is a positive change in the degree of performance in terms of the QoS of videostreaming applications, unlike when the protocols are used independently.
Highlights
Generation networks (NGNs) evolved from packet-switched networks that use Internet Protocol (IP) at the network layer (Knightson, Morita, & Towle, 2005)
We describe quality of service (QoS) of bit rate video streaming, and present a QoS performance analysis of video streaming in relation to the main network transport protocols, namely transmission control protocol (TCP) and user datagram protocol (UDP).The main research question we seek to answer is as follows: Is QoS evaluation a reasonable way to address performance challenges in bit rate video streaming in Next generation networks (NGNs)?
The network topology for the simulation was created in such a way that the two transport protocols (TCP and UDP) could be implemented.The sample applications used to generate video streaming traffic were a video conferencing application and a file transfer protocol (FTP) application
Summary
Generation networks (NGNs) evolved from packet-switched networks that use Internet Protocol (IP) at the network layer (Knightson, Morita, & Towle, 2005). Quality of service (QoS) implementation and monitoring is one amongst many approaches that seek to evaluate the performance of video-streaming applications in NGNs. As more multimedia applications are developed and deployed onto these networks, it has become necessary to introduce more advanced mechanisms to monitor the performance of these applications, in order to achieve user satisfaction. As more multimedia applications are developed and deployed onto these networks, it has become necessary to introduce more advanced mechanisms to monitor the performance of these applications, in order to achieve user satisfaction Such mechanisms need to be able to enhance QoS in both legacy and concurrent NGNs, so to be able to meet user demand.
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