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 20 for “"Node failure"”.
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Route recovery schemes for link and node failure and link congestion
Link/Node failure occurs frequently causing service disruption in computer networks. Hardware techniques have been developed to protect the network from Link/Node failure. These techniques work in physical layer, therefore their convergence time is very small. On the other hand, many schemes have …
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Task Recovery in Self-Organised Multi-Agent Systems for Distributed Domains
… resource allocation, sharing, task execution and node failure. The focus of this research is on task execution in distributed environments and the effects of node failure on service provision. Most methods in the literature which provide fault tolerance, use reactive techniques; these provide …
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Investigating system resilience in distributed evolutionary GAN training
… on systems that encounter frequent node failures. When faced with a single node failure, Lipizzaner's entire experiment comes to a halt and must be restarted. We see a need for increasing Lipizzaner's resilience to such failures and do the following. We apply a combination of …
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Energy-efficient information inference in wireless sensor networks based on graphical modeling
… from energy-saving sleep cycles, and (2) sensor-node failure tolerance in harsh environments. In our approach, we develop a pairwise Markov Random Field (MRF) to model the spatial correlations in a sensor network. Our MRF model is first constructed through automatic learning from historical …
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Segurança em redes definidas por software :autenticação, controle de acesso e consistência com plano de controle eficientemente distribuído
… scenarios where there is a high rate of network node failure. It is also proven that placement optimization reduces the average latency between controllers. A simulator for Software-Defined Networking has been developed and validated. The simulations of security policy enforcement in real network …
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Energy-Efficient Measurement of Coverage in Distributed Sensor Networks
… a reality due to recent developments in sensor node hardware and algorithms. Sensor networks can provide real-time information based on detection and tracking. This information cannot be reliable if little is known about the sensor coverage of the network, which can be defined as the total …
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Structure and topology of transcriptional regulatory networks and their applications in bio-inspired networking
… we pinpoint the role of a certain three-node motif, called Feed Forward Loop (FFL) motif in topological robustness as well as information spread in TRNs.</p> <p>With the understanding of the TRN topology, we explore its potential use in design of fault-tolerant communication topologies. …
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Adaptive clustering and transmission range adjustment for topology control in wireless sensor networks
… by a limited energy supply and a large number of nodes. Topology control (TC) as one of the main ways to control energy consumption in WSNs has been the focus of a considerable body of research. Topology control algorithms can be divided into duty-cycle-based algorithms and …
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Capacity provisioning, failure recovery and throughput analysis for low earth orbit satellite constellations
… and spare capacity for recovering from a link or node failure are examined. In both cases, we use a method of \cuts on a graph" to obtain lower bounds on capacity requirements and subsequently find algorithms for routing and failure recovery that meet these bounds. Finally, we quantify the …
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Distributed policy-based management framework for wireless sensor networks.
… scale of hundreds, if not thousands, of nodes; and constrained hardware resources. Memory, processing, and battery power are limited, making WSNs capable of handling only applications with limited resource requirements. Consequently, the implementation of policy-based management …
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A Low-Complexity Architecture and Framework for Enabling Cognition in Heterogenous Wireless Sensor Networks
… to manufacture different types of Sensor Nodes (SN) that results in fast growing heterogeneous Wireless Sensor Networks (WSNs). These WSN’s are applicable for a wide range of applications relevant for military, industry and domestic use. However, WSNs have particular features such as …
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Integrating Adaptive services in Grid Resource Brokering
… to change due to performance degradation and node failure. The resources include processing elements, storage, network, and so on; they come from the interconnection of parallel machines, clusters, or any workstation. One of the main properties of these resources is to have changing …
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Physically-asynchronous logically-synchronous (PALS) system design and development
… views and actions across distributed computing nodes. Guaranteeing consistency in these distributed computations is challenging. In particular, distributed systems are physically asynchronous because system clocks at each node cannot be perfectly synchronized. Such physical asynchrony, if not …
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Resilience Model for Teams of Autonomous Unmanned Aerial Vehicles (UAV) Executing Surveillance Missions
… with low-reliability components, so unit failures are possible. Losing UAVs to failures decreases the team's coverage efficiency and impacts communication, given that UAVs are also communication nodes. Such is the case of a Flying Ad Hoc Network (FANET), where the failure of a …
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Prioritized Sensor Detection with Communication Constraints: A Cyber-Physical Systems Approach
… a biconnected graph that is robust to a single node failure. We then combine the prioritized search algorithm from Part I and the communication constraints from Part II to provide a decentralized prioritized sensing control algorithm for a heterogenous sensor network that maintains network …
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Trust-based Service Management of Internet of Things Systems and Its Applications
… to select trust feedback from owners of IoT nodes sharing similar social interests. We develop a novel adaptive filtering technique to adjust trust protocol parameters dynamically to minimize trust estimation bias and maximize application performance. Our adaptive IoT trust protocol is …
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Repairing wireless sensor network connectivity in damaged environments
… sensor network can become partitioned due to node failure, requiring the deployment of additional relay nodes in order to restore network connectivity. This introduces an optimisation problem involving a tradeoff between the number of additional nodes that are required and the costs of moving …
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A Mesh Architecture for Robust Packet Delivery in Airborne Networks
… overhead may be generated due to the high node mobility and dramatic topology changes. Second, temporary link failure may abort the delivery of a packet in some intermediate router. In this thesis, we propose a cluster-based reactive routing protocol to alleviate these problems. Our …
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Design and evaluation of network survivability schemes for correlated multi-failure scenarios
… systems to multi-wavelength optical switching nodes. Today these setups provide immense levels of traffic scalability, reaching well into the 100s of gigabits/second and even terabits/second ranges. Owing to this growth, network survivability is now a central concern, as even a single link or …
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Carrier grade resilience in geographically distributed software defined networks
… of the Internet is its ability to recover from failures, such as link or equipment failure. The goal of network resilience heavily influenced the design of the Internet, leading to the use of distributed routing protocols. While distributed algorithms largely solve the issue of network …