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 21 for “"Link failure"”.
-
Link failure protection and restoration in WDM optical networks
… (WDM) optical network, the failure of fiber links may cause the failure of multiple optical channels, thereby leading to large data loss. Therefore the survivable WDM optical networks where the affected traffic under link failure can be restored, have been a matter of much …
-
Survivability in layered networks
In layered networks, a single failure at the lower (physical) layer may cause multiple failures at the upper (logical) layer. As a result, traditional schemes that protect against single failures may not be effective in layered networks. This thesis studies the problem of maximizing network …
-
Optical sensing as a means of monitoring health of multicomputer networks
… can allow the multicomputer to detect imminent failure in a particular section of the interconnection network due to damaging strain. This detection method allows the rerouting of critical data before data link failure occurs. This thesis investigates the implementation of the extrinsic …
-
Design and evaluation of AMPER : a probabilistic routing protocol for mobile ad hoc networks
… establish connectivity via multi-hop wireless links, without relying on any pre-configured network infrastructure. Traditional ad hoc routing protocols use a large number of routing packets to adapt to network changes, thereby reducing the amount of bandwidth left to carry data. Moreover, they …
-
A Mesh Architecture for Robust Packet Delivery in Airborne Networks
… 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 solution takes advantage of mesh routers installed in unmanned aerial …
-
Network protection with service guarantees
… an increasing need to protect against network failures. Traditional network protection has been an "all-or-nothing" approach: after any failure, all network traffic is restored. Due to the cost of providing this full protection, many network operators opt to not provide protection whatsoever. …
-
Traffic engineering for hybrid optical and electronic switching networks
… and low-priority voice and data traffic. Link failure is a problem that seriously affects QoS-enabled routing. The thesis addresses this challenge by designing a mechanism to restore network connectivity and reach optimality in the event of failures, while using a variant of link-state …
-
Survivable paths in multilayer networks
… but together will survive any single physical link failure. First, we consider the problem of finding the minimum number of survivable paths. In particular, we focus on two versions of this problem: one where the length of a path is restricted, and the other where the number of paths sharing a …
-
Product of random stochastic matrices and distributed averaging
… of inhomogeneous stochastic matrices. Then, link-failure models for averaging dynamics will be introduced and it will be shown that under general conditions, link failure does not affect the limiting behavior of averaging dynamics. Then, the application of the developed methods to the study …
-
A robust optimization approach to network design
… tasks: traffic routing, capacity allocation, and link placement. The routing and capacity allocation problems are formulated as a convex mathematical program. To extend this formulation to discrete optimization problems, such as the link placement sub-problem, it is reformulated as a mixed integer …
-
A fault-tolerant building block for transputer networks for real-time processing
… transient physical faults and permanent failures in large parallel processing systems with potential for real-time processing. • Efficient group communications for redundant data exchanges through multiple communication links that connect the group peers. • Transparent fault-tolerance. • …
-
Transparent data plane failure tolerance for software defined networks
… it is very important to have adequate failure tolerance mechanisms in order to ensure minimal disruption is user operations. Rather than handling failures in the control plane, it is more desirable to have failure tolerance mechanisms in the data plane. To this end, Software Defined …
-
Network disaster recovery via dynamic service-aware risk management
… evolve over time. For example, in earthquakes, failures propagate outward from the epicenter across successive time steps, creating time-varying and correlated risk for network links. In practice, routing must therefore be both dynamic and service-aware, reflecting class priorities, (Service …
-
Survivability Against Intelligent Adversary in Next-Generation Wireless Networks
… minimizes the risk of attack while minimizing link failure. Last but not that leastFinally, we develop a state-of-the-art testbed with off-the-shelf devices to evaluate the performance of the proposed framework.
-
Network reliability estimation
… choice. In modern communication networks, link failure probabilities are usually small and hence network failures become rare events. This poses a challenge to estimate the network reliability. In this thesis we present different techniques for network reliability estimation. There are two …
-
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 …
-
Characterization of Alternaria alternata isolates causing brown spot of potatoes in South Africa
… in South Africa led to an investigation into the failure of strobilurins to control brown spot. Samples were collected during the 2012-2013 growing season and eight Alternaria isolates were recovered from five growing regions. In vitro sensitivity tests showed that six of the eight isolates had …
-
Towards Resilient and Secure Beyond-5G Non-Terrestrial Networks (B5G-NTNs): An End-to-End Cloud-Native Framework
… to monitor and manage these networks, detecting link failures and optimizing traffic routing paths between terrestrial and satellite components. The GNN model achieves an 85% accuracy in link failure detection and significantly reduces end-to-end delays in NTN deployments, highlighting the …
-
Video Communications over Dynamic Ad Hoc Networks
… (e.g., in the presence of frequent node/link failure, interference, shadowing, fading, and so forth). Existing ad hoc routing protocols work well for data communications, but are not optimized for video, which is sensitive to latency and packet loss. Moreover, traditional end system based …
-
Utilizing A Real Life Data Warehouse To Develop Freeway Travel Time Eliability Stochastic Models
… the effect of travel demand variation and link capacity degradation on the reliability of a roadway network. The method is applied to a hypothetical roadway network and the results show that both travel time reliability and capacity reliability are consistent measures for reliability of the …
Page 1 of 2