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 16 of 16 for “"Multi-hop networks"”.
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Range Adaptive Protocols for Wireless Multi-Hop Networks
… of wireless links. Wireless mobile ad hoc networks, however, typically only take limited advantage of these enhancements. In this research, the medium access control protocol and ad hoc routing protocol are extended to take advantage of radios offering multi-user interference cancellation …
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Evaluation of Transport Layer Protocols for wireless multi-hop networks
Wireless Multi-hop Network (WMN) is a collection of wireless nodes that dynamically form a network without an infrastructure support. It is a promising technology for several interesting applications such as broadband home networking, community and neighborhood networks, coordinated management, …
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The effect of topology control for wireless multi-hop networks
Wireless multi-hop networks are not restricted to rural development efforts. They have found uses in the military, industry, as well as in urban areas. The focus of this study is on stationary wireless multi-hop networks whose primary purpose is the provisioning of Internet access using low cost, …
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Utility Accrual Real-time Channel Establishment in Multi-hop Networks
… in-time delivery of real-time messages in multi-hop networks. In this thesis, we propose two schemes to establish real-time channels for soft real-time applications whose timeliness properties are characterized using Jensen's Time Utility Functions (TUFs) that are non-increasing. The two …
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Design of an IP address Auto-Configuration scheme for Wireless Multi-Hop Networks
The importance of wireless ad-hoc networks (eg wireless mesh networks) in community and commercial connectivity cannot be underestimated in view of the benefits associated with such networks. An ad-hoc network must assemble itself from any devices that happen to be nearby, and adapt as devices move …
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Cross-layer design with multi-packet reception, MAC, and network coding in multi-hop networks
… can be used to optimize the cooperative use of multi-packet reception (MPR) and network coding. A simple and intuitive model is constructed for the behavior of an opportunistic network coding scheme called COPE proposed by Katti et. al., MPR, the 802.11 MAC, and their combination. The model is …
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An energy-efficient communication system for ad hoc wireless and sensor networks
… reduces the energy needed for delivering data in multi-hop networks by a factor of 100 or more over IEEE 802.11. The system is composed of a duty cycling and pseudo-random Medium Access Control (MAC) that provides deterministic access to the shared medium. Furthermore, the MAC provides link level …
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Performance of Wireless Networks Subject to Constraints and Failures
… have seen a proliferation in the use of wireless multi-hop networks in diverse scenarios ranging from community mesh networks to wireless sensor networks. As wireless networks find application in such wide-ranging arenas and are deployed at large scale, they will increasingly need to operate in …
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Access Disparity Modeling and Fairness Provisioning in Multi-Hop Wireless Networks
… of throughput and delay, in wireless local area networks. This is mainly due to the physical characteristics of the underlying communication channel including signal quality degradation caused by distance, fading, noise, interference, multi-path reflection, attenuation, and user mobility. This …
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Learning-NUM: Utility Maximization in Stochastic Queueing Networks
… of utility maximization in stochastic queueing networks where the utility functions are unknown in advance but function values corresponding to the traffic rates decisions are observable after the traffic reaches the destination. The paradigm is called Learning-NUM as it requires learning the …
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Analysis and Optimization of Networks in Overload
… investigate network policy design to optimize multiple network performance metrics including delay, fairness, and stability. We leverage a deterministic fluid queueing model which regards packets as continuous flows to overcome the bottlenecks of the classic stochastic models with discrete …
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On a Joint Physical Layer and Medium Access Control Sublayer Design for Efficient Wireless Sensor Networks and Applications
Wireless sensor networks (WSNs) are distributed networks comprising small sensing devices equipped with a processor, memory, power source, and often with the capability for short range wireless communication. These networks are used in various applications, and have created interest in WSN research …
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On Interference Management for Wireless Networks
Interference is a fundamental problem in wireless networks. An effective solution to this problem usually calls for a cross-layer approach. Although there exist a large volume of works on interference management techniques in the literature, most of them are limited to signal processing at the …
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Betrachtungen zur Energieeffizienz in Funknetzwerken mit geringer Datenrate
… efficiency of data transmission in wireless networks with low data rate (=sensor networks). Often the network nodes are battery operated thus calling for node lifetimes of months or even years. Thus, energy efficiency becomes an important optimisation criteria when designing hardware as well …
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Investigations into the physical layer of underwater networks to enhance channel capacity and performance.
… regarding sustainable high capacities to enable multimedia transmissions that can monitor industrial or environmental processes. This thesis investigates the nature of the physical layer of underwater networks and investigates how it can be developed to pragmatically increase their channel …