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 34 for “"burstiness"”.
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Broadband Fading Channels: Signal Burstiness and Capacity
The general wide-sense stationary and uncorrelated scattering (WSSUS) fading channel has a similar behavior in that the capacity per unit energy equals the capacity per unit energy of the AWGN channel with the same signal-to-noise ratio. The fourth-moment cost is generalized to a fourth-order …
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Burstiness and Uncertainty Aware Service Level Planning for Enterprise Clouds
… considered important challenges such as workload burstiness, workload uncertainty, and scalability to large number of applications. This thesis presents an SLP framework that addresses the above challenges simultaneously. The framework implements a novel Resource Allocation Planning (RAP) method …
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A Calculus for Network Delay and a Note on Topologies of Interconnection Networks
… into the network by any given user satisfies "burstiness constraints." A data stream is said to satisfy a burstiness constraint if the quantity of data from the stream contained in any interval of time is less than a value that depends on the length of the interval. Given this model, we show …
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Echolocation: Using Word-Burst Analysis to Rescore Keyword Search Candidates in Low-Resource Languages
… by the speech recognizer. The word-burst, or burstiness, pattern is the tendency for word utterances to appear together in bursts as conversational topics fluctuate. We give evidence that the burstiness phenomenon exhibits itself across varied languages. Using burstiness features to train a …
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A novel approach to IP traffic splitting using flowlets
TCP's burstiness is usually regarded as harmful, or at best, inconvenient. Instead, this thesis suggests a new perspective and examines whether TCP's burstiness is useful for certain applications. It claims that burstiness can be harnessed to insulate traffic from packet reordering caused by route …
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Dynamic processor allocation for adaptively parallel work-stealing jobs
TCP's burstiness is usually regarded as harmful, or at best, inconvenient. Instead, this thesis suggests a new perspective and examines whether TCP's burstiness is useful for certain applications. It claims that burstiness can be harnessed to insulate traffic from packet reordering caused by route …
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Adaptive Asymmetric Slot Allocation for Heterogeneous Traffic in WCDMA/TDD Systems
… characteristics and metrics. The volume and burstiness of traffic are chosen as the characteristics for our adaptive dynamic slot allocation. Based on this examination, we propose four major adaptive dynamic slot allocation strategies: (i) a strategy based on the estimation of burstiness of …
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Performance Evaluation of MU-MIMO WLANs Under the Impact of Traffic Dynamics
… how the system performs under open loop traffic burstiness. We find that the aggregate downlink throughput shows a exponential decrease with an increasing amount of traffic burstiness. While the system does achieve a high throughput at lower levels of traffic burstiness, at higher levels there is …
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Performance modeling of congestion control and resource allocation under heterogeneous network traffic. Modeling and analysis of active queue management mechanism in the presence of poisson and bursty traffic arrival processes.
… single class bursty traffic and investigate how burstiness and correlations affect the performance metrics. The analytical results reveal that high burstiness and correlation can result in significant degradation of AQM performance, such as increased queueing delay and packet loss probability, …
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Studies of Dynamic Bandwidth Allocation for Real-Time VBR Video Applications
… strict delay and loss requirements, and exhibits burstiness over multiple time scales, thus imposing a challenge on network resource allocation and management. The renegotiated VBR (R-VBR) scheme, dynamically allocating resources to capture the burstiness of VBR traffic, substantially increases …
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Traffic and performance evaluation for optical networks. An Investigation into Modelling and Characterisation of Traffic Flows and Performance Analysis and Engineering for Optical Network Architectures.
… traffic that takes into consideration burstiness in small time scales. A description of the state of the art in optical networking providing a deeper insight into the current technologies, protocols and architectures in the field, which creates the motivation for more research into the …
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A calculus for stochastic QoS analysis and its application to conformance study
… The stochastic backlog, delay and output burstiness under a single deterministic server and stochastic sever are first derived. Then, the stochastic end-to-end QoS bounds have also been derived. Results on the per-flow stochastic QoS performance are also derived under aggregate scheduling. …
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Transition from integrable to chaotic domain in spectra of spin chains
… is also described by the behavior of the "burstiness" B and the Kullback–Leibler divergence DLK(PW−D(s)|Pdata(s)), where PW−D(s) and Pdata(s) are the Wigner-Dyson and the system’s spacing distribution respectively. The B coefficient is associated to a sequence of events in the system. The …
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Trade-off between power consumption and delay in wireless packetized systems
… probability of arrival together represent the burstiness of the system. The time slots are considered to be long enough that capacity can be achieved over a single slot in a sense we define. We consider the difference in average power consumption when average delay, in terms of slots, is …
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Performance and Security Trade-offs in High-Speed Networks. An investigation into the performance and security modelling and evaluation of high-speed networks based on the quantitative analysis and experimentation of queueing networks and generalised stochastic Petri nets.
… (PEPs) and the adverse impact of traffic burstiness and security protocols on performance. The contributions of this thesis are based on the development of an effective quantitative methodology for the analysis of arbitrary QN models and GSPNs through discrete-event simulation (DES) and …
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Detection of network anomalies and novel attacks in the internet via statistical network traffic separation and normality prediction
… normality, especially in cases where high burstiness is present, we propose, study and analyze a new network traffic prediction methodology, based on the "frequency domain" traffic analysis and filtering, with the objective_of enhancing the network anomaly detection capabilities. Our …
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Impact of processing energy on the capacity of wireless channels
… in the low Signal to Noise Ratio (SNR) regime, burstiness becomes optimal when the processing energy is greater than half the square of the total energy available to the transmitter. This analysis is extended to the AWGN multiple access channel with M senders and a single receiver. We first show …
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A study on fairness and latency issues over high speed networks and data center networks
… have characteristics of high bandwidth and high burstiness which make it difficult to address issues such as fairness, queuing latency and link utilization. In this study, we first conduct extensive experimental evaluation of the performance of 10Gbps high speed networks. We found inter-protocol …
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Controller Analysis and Synthesis for Wireless Servo Systems
… of the network and begins to capture natural burstiness of network transmissions. Switched dynamics characterize different modes of operation that depend on the success of a full transmission loop. Two different control approaches are examined in detail. The first approach examines how a state …
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Performance evaluation of multimedia satellite communications systems using on-board packet switches
… are used to examine the effects of traffic burstiness and long-range dependent behaviour. Multiple Frequency Time Division Multiple Access (MF-TDMA) is utilized on the uplink in conjunction with a dynamic capacity allocation scheme. Higher priority is given to voice and video real-time …
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