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Internet Protocol Television - IPTV is a new form of traditional TV, in which TV content is delivered using IP based networks which are managed to provide the required level of quality of service, experience, security, interactivity and reliability. Quality of Service (QoS) and Quality of Experience (QoE) are the two major factors which need to be ensured in order to achieve IPTV customer satisfaction...
The satisfaction level of femtocell users depends on the availability of requested bandwidth. But, the xDSL line that can be used for the backhauling of femtocell traffic cannot always provide sufficient bandwidth due to the inequality between the xDSL capacity and demanded bandwidth of home applications, like IPTV, PC, Wi-Fi, and others. A service level agreement (SLA) between xDSL and the femtocell...
Fueled by the promises of high spectral efficiency, adaptive OFDMA has attracted enormous research interests over the last decade. The significant capacity gain of adaptive OFDMA comes from fast adaptation of resource allocation in response to instantaneous channel conditions. Despite years of efforts to improve the practicality of adaptive OFDMA, such promising technique is still far from real implementation...
The multiple choices of access networks offer different opportunities and overcome the limitations of other technologies. Optimal selection of interface is a big challenge for multiple interfaces supported mobile terminals to make a seamless handover and to optimize the power consumption. Seamless handover, resource management, and CAC to support QoS and multiple interface management to reduce power...
MultiProtocol label switching (MPLS) is the new means to take care of the fastest growing communication network to enhance the speed, scalability and service provisioning capabilities. In order to optimize the use of transmission resources, MPLS carries differentiated services across the Internet through a virtual path capability between packet (label) switches. MPLS also has the capabilities to engineer...
This paper presents modeling and simulation for constraint-based routing (CBR) algorithm for multi protocol label switching (MPLS) network which is designed for mapping among any layer-2 protocols and any layer-3 protocols of the OSI model. The MPLS network has the capability of routing with some specific constraints for supporting desired quality of service (QoS). The most important constraint is...
Measurement of quality of service (QoS) parameters and its statistical analysis becomes a key issue for Mobile WiMAX service providers to manage the network efficiently and to support end-to-end quality of experience (QoE). On the other hand, for the measurement of QoS parameters, economy (memory space), timelines and accuracy are the primary concerns. Therefore, it is necessary for the service provider...
Key features desired from IMT-Advanced network include open architecture for productivity, increased end-user throughput, reduced latency, support for full mobility and end-to-end QoS. A femtocell is a small cellular base station designed for use in residential or small business environments. It connects to the service provider's network via broadband (such as DSL or cable). The IMT-Advanced networks...
In wireless communication systems, quality of service (QoS) is one of the most important issues from both the users and operators point of view. All the parameters related to QoS are not same important for all users and applications. The satisfaction level of different users also does not depend on same QoS parameters. In this paper, we discuss the QoS parameters and then propose a priority order...
Pervasive computing is an emerging field where a user will interact with a large number of computing devices simultaneously providing access to the information and services anytime, anywhere. To realize that Mark Weiser's vision of disappearing technology and ubiquitous/pervasive computing a lot of research efforts are needed. A QoS based middleware is needed to integrate the existing technologies...
Network Simulator 2 (NS2) is one of the more used network simulator across the globe. However, NS2 is often associated with a steep learning curve for new users. Therefore an effort to automate the process of using NS2 using a graphical user interface (GUI) has been initiated. The paper describes the tool kit GUI known as Internet protocol quality of services toolkit (IPQit). It provides an easy to...
In wireless networks, power allocation is an effective technique for prolonging network lifetime, achieving better quality-of-service (QoS), and reducing network interference. However, these benefits depend on knowledge of the channel state information (CSI), which is hardly perfect. Therefore, robust algorithms that take into account such CSI uncertainties play an important role in the design of...
This paper evaluates the performance of live compressed motion image transmission in coherence with the development of the multiple video streaming and compression (multiple-VSCS) software, as applied for the intelligent traffic management system. Motion images of multiple sources are captured, jointly compressed and streamed real time via utilization of the 5.8 GHz OFDM outdoor wireless LAN network...
High availability is a key requirement in mobile communication systems, especially, when it is used for mission-critical services such as public safety. A failure in the fixed network infrastructure can affect a large number of its users and risk loss of lives. The software applications that run the infrastructure and provide services to the mobile users according to some defined communication protocols...
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