Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"Dynamic Channel"”.
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Power control for fair dynamic channel reservation
… based medium access control protocol, Dynamic Channel Reservation (DCR) in realistic high-density traffic scenarios. We focus on the communication requirements that allow vehicles to receive safety messages well enough in advance to warn the driver in a timely manner and avoid crashes. …
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Distributed dynamic channel allocation in mobile computing system
Channel allocation problem is one of the most important issues in mobile computing networks. The purpose of this thesis is to develop a new distributed dynamic channel allocation algorithm. The proposed algorithm attempts to reuse channels in different cells to optimize the channel usage. It also …
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Dynamic channel allocation in satellite and wireless networks
… thesis is to understand how to utilize wireless channels in a fair and efficient manner within a multi-users communication environment. We start by exploring the allocation of a single wireless downlink fading channel among competing users. The allocation of a single uplink multiacccess fading …
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Dynamic channel selection for meshed wireless personal area network
… and increase the capacity for meshed WPAN. A Dynamic Channel Selection Algorithm has been suggested. This algorithm uses the available channels, which are five channels in the WPAN, to enable simultaneous transmission of two or more channels to achieve a high packet delivery ratio and better …
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Dynamic Channel -Aware Bandwidth Management in IEEE 802.11 Networks
… requirements to support multimedia data in a dynamic environment such as a IEEE 802.11 wireless network is to provide the application minimum throughput guarantees. In this work, we present a cross-layer architecture that enables the provision of rate guarantees to multimedia applications, …
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Solutions for Dynamic Channel Assignment and Synchronization Problem for Distributed Wireless Multimedia System
… personal communication service systems, a channel assignment problem and synchronization problems should be solved efficiently. Recent demand for mobile telephone service have been growing rapidly while the electro-magnetic spectrum of frequencies allocated for this purpose remain limited. …
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Evaluation of Dynamic Channel and Power Assignment Techniques for Cognitive Dynamic Spectrum Access Networks
… three main contributions with respect to the Dynamic Channel and Power Assignment (DCPA) problem. DCPA refers to the allocation of transmit power and frequency channels to links in a cognitive dynamic spectrum network so as to maximize the total number of feasible links while minimizing the …
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Design of a medium access control protocol that exploits the structures of vehicular networks
… exploited to design a protocol based on dynamic TDMA that is well suited for VANETs. We present the Dynamic Channel Partition and Reservation (DCPR) Protocol, which is a specific VANET MAC protocol designed for operating a dynamic TDMA mechanism in a way robust to vehicular mobility, by …
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Towards NextG Receiver: Online Real-Time Machine Learning with Domain Knowledge for Wireless Communications
… large number of possible system configurations, dynamic channel environments, and real-time operation adaptations. The highly dynamic nature of wireless environments and the operation adaptations necessitate AI/ML solutions to adapt to rapid channel variations and operation changes on a …
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Self-Organizing Networks Prospects for Group Scheduling for Disaster Relief and Public Safety Communications in Cellular Networks
… of the network are addressed regardless of dynamic channel conditions and locations. In this thesis, subscribers are divided into groups viz., PS groups and regular subscriber groups. A new scheme, beyond the type of services being used by subscribers, priorities and fairness, is developed. …
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Advanced handover procedure for cellular communication systems
… interrogate a candidate base station for a free channel. Handover signalling is exchanged via the fixed network and the time delay required to perform the handover is greatly affected by the levels of teletraffic handled by the network. In this thesis, a new handover strategy is developed to …
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Design and Implementation of an Ultrabroadband Millimeter-Wavelength Vector Sliding Correlator Channel Sounder and In-Building Multipath Measurements at 2.5 & 60 GHz
… need for a deeper understanding of the wireless channels upon which these devices communicate. In order for the visions of real time full-motion video, multimedia, and high speed data delivery inherent in the 3rd and 4th generations of wireless communication standards to be fully realized, system …
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Resource Allocation and Adaptive Antennas in Cellular Communications
… improvement can be achieved by reducing co-channel interference. Several techniques have been proposed in literature for mitigating co-channel interference, such as adaptive antennas and power control. Also, by allocating transmitter power and communication channels efficiently (resource …
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Efficient medium access control protocol for vehicular ad-hoc networks
… joining of new nodes moving at high speeds, dynamic change in topology and connectivity, time variability of signal strength, throughput and time delay. One of the most challenging issues facing vehicular networks lies in the design of efficient resource management schemes, due to the mobile …
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High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks
… efficiency, efficient packet delivery under dynamic channel conditions, and effective route discovery. This thesis presents a series of protocols to address these challenges. The first part of this thesis presents a new single-channel energy-efficient MAC protocol, called the …
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Learning-based Decision Making in Wireless Communications
… reinforcement learning based framework for dynamic multichannel access. We consider both a single-user case and a scenario in which multiple users attempt to access channels simultaneously. In the single-user model, in order to evaluate the performance of the proposed channel access policy …
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Access network selection schemes for multiple calls in next generation wireless networks
… requirements and the available networks exhibit dynamic channel conditions, the choice of a suitable RAT capable of providing the "Always Best Connected" (ABC) experience for the user becomes a challenge. In this thesis, the problem of selecting the suitable RAT that is capable of meeting the QoS …
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Multi-Dimensional QoS and Collaborative MAC Layer Design for Dense, Diverse, and Dynamic IoT Network
… Quality-of-Service (QoS) requirements under dynamic channel conditions. On account of high access collision and optimization problem complexity, the performance degradation brings new challenges to the existing Media Access Control (MAC) layer design in Wi-Fi. This thesis proposes novel …
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Online Optimization for Edge Computing under Uncertainty in Wireless Networks
… incomplete future information on their wireless channel gains and computing capabilities. The goal of this dissertation is to develop foundational science for the deployment, performance analysis, and low-complexity optimization of edge computing under the aforementioned uncertainties. First, the …
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Optimizing Information Freshness in Wireless Networks
… sample sizes, cellular transmission models, dynamic channel conditions, etc. Second, we design schedulers to guarantee hard or soft AoI deadlines for each information source. More important, inspired by our results from guaranteeing AoI deadlines, we develop a general design framework that …
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