An adaptive filtering architecture for QoS-based heterogeneous networks.
Item
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Title
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An adaptive filtering architecture for QoS-based heterogeneous networks.
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Identifier
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AAI3187426
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identifier
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3187426
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Creator
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De Angelis, Flavio.
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Contributor
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Adviser: Ibrahim Habib
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Date
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2005
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical
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Abstract
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The convergence of mobility, Internet, and multimedia services is, finally, seen possible through Third Generation (3G) networks. This thesis is motivated by the need to address two key issues that this evolution will arise: (i) the difficulty of guaranteeing the quality of service (QoS) requirements of multimedia services, while maximizing the efficiency of the IP network assets, and (ii) the difficulty of maintaining these requirements over the time-varying bandwidth of the wireless channel.;The aim of this thesis is to propose and analyze an adaptive filtering architecture that solves these problems, by enabling an "intelligent" interaction between the multimedia applications and the network. The proposed architecture can be implemented as a part of a "middleware" layer that interfaces the applications with the underlying network infrastructure. It also calls for the deployment of adaptive filters at the output ports of each node of the network. Each filter is capable of selecting both the coding rate and format of the multimedia traffic based upon the dynamic conditions of the underlying heterogeneous network, e.g., core and radio access networks' links. In the proposed solution, a service provider can offer two distinct grades of service (GoS) to which users may subscribe: Premium, or Economy. These grades of services offer the same multimedia contents but at different levels of qualities. A quality level is defined by a set of parameters such as call blocking and dropping rates, coding rate and format of the media. The proposed architecture will then maximize the utilization of the networks' assets (i.e., links' capacities, buffers, switching ports) and avoid congestion while maintaining the QoS requirements (e.g. bit error rate, packet transfer delay, percentages of packets lost and delayed) of each type of media (e.g., video, voice and data). Some of the value-added benefits include increased number of admitted users, reduced percentage of lost and delayed packets, lower packet transfer delays, reduced call dropping and blocking probabilities, higher throughput-based and power-based cell loading. These improvements indicate better utilization of the network's assets that translates into additional revenues for the provider without incurring additional capital expenditures.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
