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.
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Showing 1 to 20 of 67 for “"Network lifetime"”.
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Optimizing network lifetime in sensor networks with limited recharging capabilities
… of civil infrastructures with wireless sensor networks aids in detecting failures early, but faces power challenges in ensuring reasonable network lifetimes. Recharging select nodes with Unmanned Aerial Vehicles (UAVs) provides a solution that currently can recharge a single node; however, …
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A virtualised routing protocol for improving network lifetime in cluster based sensor networks
In Wireless Sensor Networks (WSN), enhancing network lifetime is one of the critical challenges that should be considered during the network design. Sensor nodes exhaust their power in various activities such as sensing, processing and communication that represents the most energy-consuming and …
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Network lifetime extension, power conservation and interference suppression for next generation mobile wireless networks
… design of the next generation multihop wireless networks are network lifetime extension and interference suppression. In this dissertation, these two issues are addressed. In the area of interference suppression, a new family of projection multiuser detectors, based on a generalized, two-stage …
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QoS constrained cellular ad hoc augmented networks
… (QoS) constrained cellular ad hoc augmented network (CAHAN) architectures are proposed for next generation wireless networks. The CAHAN architectures have a hybrid architecture, in which each MT of CDMA cellular networks has ad hoc communication capability. The CAHAN architectures are an …
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Energy Efficient Cluster Head Selection in Fixed Wireless Sensor Networks
Energy is the main bottleneck for wireless sensor networks and it has dominating effects on network lifetime. Sensors have finite energy and during the process of sensing and transmitting data to the cluster head they lose energy. Sensors that are furthest away from the cluster head require more …
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Energy-efficient relay cooperation for lifetime maximization
… power allocation among relays for lifetime maximization in a dual-hop relay network operated by amplify-and-forward relays with battery limitations. Power allocation algorithms are proposed for three different scenarios. First, we study the relay cooperation case where all the …
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An augmentation algorithm for improving longevity in ad hoc wireless networks
… into improving the longevity of wireless ad hoc networks. The primary contribution of this study is an augmentation algorithm that takes a two-dimensional network arrangement. and systematically adds augmented nodes to create a bi-connected topology. Simulations were run to compare the …
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Hierarchical Clustering Techniques for Energy-efficient Algorithms in WSNs
In Wireless Sensor Networks (WSNs) with large number of micro-sensor nodes, successfully receiving all the useful data with unnecessary loss of energy is a major challenge. WSNs are extremely important for many applications in civil and military domains. Despite their use in many successful …
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The performance evaluation of different logical topologies and their respective protocols for wireless sensor networks
Wireless sensor networks (WSNs) are at present a standout amongst the most, guaranteeing areas in the field of information and communication technologies (ICT). This new technology has boundless potential for various applications in distinctive regions, including environmental research, medical …
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Joint position estimation, packet routing and sleep scheduling in wireless sensor networks
Wireless Sensor Network (WSN) is an important research field in Computer Science with applications that span multiple domains. Due to the limitation of sensor nodes, network lifetime is a critical issue that needs to be addressed. Therefore, in this thesis I propose the Energy-aware Connected …
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In -Network Computation in Wireless Sensor Networks
Next, we study another important metric in sensor networks, which is network lifetime. We consider a formulation of maximizing network lifetime given the simple task of downloading different quantities of data over nodes with different energy levels. We reduce the problem of choosing lifetime …
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Motion Coordination and Performance Analysis of Multiple Vehicle Systems
… of the deployment of an environment monitoring network of mobile sensors to improve the network lifetime and sensing quality. A distributed algorithm is presented that improves the system's performance starting from an initial deployment.
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Energy- and information-managed wireless sensor networks: modelling and simulation
Wireless Sensor Networks (WSNs) allow the remote and distributed monitoring of parameters in their deployed environment. WSNs are receiving increasing research interest, due to their ability to enable a wide range of applications, and their potential to have a major impact on ubiquitous computing. …
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Energy efficiency in ad-hoc wireless networks
In ad-hoc wireless networks, nodes are typically battery-powered, therefore energy limitations are among the critical constraints in ad-hoc wireless networks' development. The approaches investigated in this thesis to achieve energy efficient performance in wireless networks can be grouped into …
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Real-Time and Energy-Efficient Routing for Industrial Wireless Sensor-Actuator Networks
… industries are adopting Wireless Sensor-Actuator Networks (WSANs) that enable sensors and actuators to communicate through low-power wireless mesh networks. Industrial monitoring and control applications require real-time communication among sensors, controllers and actuators within end-to-end …
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Algorithms and Optimization for Wireless Networks
Recently, many new types of wireless networks have emerged for both civil and military applications, such as wireless sensor networks, ad hoc networks, among others. To improve the performance of these wireless networks, many advanced communication techniques have been developed at the physical …
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Improving the dependability of safety critical wireless sensor network scheduling using artificial intelligence
… to specified requirements, a Wireless Sensor Network (WSN) must prioritise the validation of its three fundamental attributes: Connectivity, Coverage, and Network Lifetime. Existing literature highlights numerous research endeavours to resolve reliability issues in WSNs, often concentrating on …
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Modeling and analysis of multi-hop routing in wireless sensor networks by using matlab
… and the non-equivalence of wireless sensor network nodes, it is imperative to reduce and rationally use the energy consumption of the nodes to prolong the network lifetime. In this project, a random multi-hop routing approach for wireless sensor networks was modeled and simulated. In order …
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Distributed Regular Topology Overlay Formation in Multihop Wireless Networks
… the rapid rise in popularity, wireless sensor networks have become an integral part of a large spectrum of applications. As the networks continue to grow in size, the need for <i>Energy Conservation, Fairness, Capacity, Reliability</i> and <i>Fault Tolerance</i> are increased. Overlay creation …
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Load distribution and energy awareness in manets using multipath routing
Wireless ad-hoc networks are characterised by lack of infrastructure and frequent topological changes. Traditional routing protocols seek only single paths to the desired destinations, while multipath routing obtains multiple paths for only marginal additional overhead. This work argues that …
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