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 32 for “"Delay performance"”.
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The delay performance of adaptive routing and scheduling in communication networks
… scheduling algorithms to deliver good QoS performance under various network conditions. In this dissertation, we study the delay performance of routing and scheduling algorithms in communication networks. A collection of algorithms called MaxWeight Scheduling (MWS) algorithms is known to be …
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From Tarmac to Timetable: A Data-Driven Study of Airline Delay Performance in Nigeria
… the patterns, causes, and impacts of flight delays in the Nigerian aviation sector from January 2024 to January 2025. Utilizing a dataset containing flight details—including scheduled and actual departure/arrival times, routes, and airline information—the study employs advanced data analytics …
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Transport layer protocol design over flow-switched data networks
… network. Moreover TCP has poor throughput and delay performance at high transfer rates due to window flow control and window closing with missing or dropped packets. In OFS, flows are scheduled and congestion control is performed by a scheduling algorithm. Thus, we focus on defining a more …
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Autonomous routing algorithms for networks with wide-spread failures : a case for differential backlog routing
We study the performance of a differential backlog routing algorithm in a network with random failures. Differential Backlog routing is a novel routing algorithm where packets are routed through multiple paths to their destinations based on queue backlog information. It is known that Differential …
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PERFORMANCE OF A ROBUST MULTIPLE-RING, MULTIPLE-TOKEN NETWORK
… to all rings [4,5] show that the packet transfer delay improves with the number of rings connected to each node. However, such multiple-ring TRNs are not economically feasible as the cost of the ring interface increases with the number of rings. Each node must provide a separate transceiver and …
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Hybrid flow data center network architecture design and analysis
… to the study of all-optical networks is on the performance of hybrid flow data center networks. We compare the delay performance of hybrid flow architectures and traditional packet switched networks in future data center. We present a simplified data center traffic model, where data center …
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Scheduling real-time traffic in wireless networks
… traffic is that it has straight end-to-end delay constraint. We begin the investigation by studying a scheduling principle which naturally achieves the best delay performance in stationary channel conditions. Since the resulting scheduling algorithm maintains equal flow delays across the …
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Throughput analysis of input-queued packet switches : multicasting and speedup
… of such capabilities will require an even higher performance of packet switches and routers. Among several competing high-speed router architectures, those based on a crossbar backplane have become the most widely used by the industry. Essentially, crossbar architectures come in two flavors: (1) …
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A NEW CONTROLLED VIDEO FRAME LOSS SCHEME FOR VIDEO TRANMISSION OVER HIGH SPEED NETWORKS
… simulation results for video frame loss and data delay performance are also described.
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Scheduling in switched queueing networks with heavy-tailed trac
… trac. In this setting we evaluate the delay performance of the widely-studied class of Max-Weight scheduling policies. As performance metric we use the notion of delay stability, i.e., whether the steady-state expected delay in a queue is finite or not. Max-Weight policies are known to …
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Minimum-delay HF communications
… towards reliable communication with minimum delay. We study HF channel models and communication link design tools, which indicate that our minimum-delay problem is feasible but difficult to solve. Extant HF modems are observed to add prohibitive amounts of latency to ensure robustness, …
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Performance modeling and analysis of parallel processing and low earth orbit satellite communication systems
… research described in this dissertation examines performance characteristics of two types of packet-switched data communication systems. The first system to be analyzed operates in a parallel processing environment where cooperating processors independently perform assigned tasks. In this …
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Control of mobile networks using dynamic vehicle routing
… Unmanned Aerial Vehicle (UAV) routing, and delay tolerant wireless networks. The main contribution of this thesis is the quantification of the delay performance of the Dynamic Pickup and Delivery Problem as a function of the number of vehicles, the total arrival rate of messages, the …
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Design of Media Access Control Schemes for Performance Enhancement of Future Generation Wireless Systems
… scheme is shown to offer better throughput and delay performance versus existing MAC schemes proposed for simultaneous transmission. In addition, this MAC scheme is able to achieve this performance in a manner compatible with the existing standard. The latter part of this thesis proposes a new …
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Distributed control of computer communication systems
… at different levels. Evaluation of the performance of networks in which different flow control mechanisms act simultaneously is an important area of research, and is examined in depth in this thesis. This thesis presents the modelling of a finite resource computer communication network …
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Low-swing signaling for energy efficient on-chip networks
… properties enable them to approach energy and delay performance of a point-to-point interconnect of variable lengths. Simulated in 45nm SOI CMOS, the 10mm SRLR featured with high energy efficiency consumes 338fJ/b at 5.4Gb/s/ch while the 10mm VLR raises its data rate up to 16.OGb/s/ch with …
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Fundamental limits of random access in wireless networks
… capability to match the optimal throughput performance (maximum stability region) of centralized scheduling mechanisms. The throughput optimality however has been established for activation rules that are relatively sluggish, and may yield excessive queues and delays. More …
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Towards practical policies for network control
… optimal routing policies are known to have poor delay performance because of packets traversing loops in the network. In the first part of the thesis, we develop a new distributed policy that forwards packets along directed acyclic graphs (DAGs) to avoid the looping problem. This policy uses a …
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Performance Analysis of Multicomputer Interconnection Network Designs
In this thesis, the design and performance issues of multicomputer interconnection networks are addressed. Analytic models are used to evaluate the performance of large scale multicomputer networks. Performance is measured as the average end-to-end delay between communicating nodes. The models …
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Enhanced Collision Resolution for the IEEE 802.11 Distributed Coordination Function
… are important factors to improve the DCF performance, and they conflict with each other, improving one will have an adverse effect on the other and consequently will harm the DCF performance. We propose an algorithm, \gls{ECRA}, that solves collisions once they occur without instantly …
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