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 138 for “"packet loss"”.
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Formation control of multiple robots under packet loss
… addresses the challenges posed by communication packet loss in leader-follower formation control of multi-robot systems, with a focus on Automated Guided Vehicles (AGVs) and drones. It presents a comprehensive analysis of how packet loss affects linear controllers, including Linear Quadratic …
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ChitChat : making video chat robust to packet loss
… Often, however, chatting sessions suffer from packet loss, which causes video outage and poor quality. Existing solutions however are unsatisfying. Retransmissions increase the delay and hence can interact negatively with the strict timing requirements of interactive video. FEC codes introduce …
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Describing functions for information channels subject to packet loss and quantization
… and command information to be shared regularly. Packet-based wireless communication systems like these that operate near their limits are necessarily quantized, and often prone to loss. These properties directly impact the overall system performance, and thus methodologies for understanding and …
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Low-Overhead Packet Loss Diagnosis for Virtual Private Clouds using P4-Programmable NICs
… that result in performance degradation, such as packet loss, within the cloud environment. Current monitoring systems are either designed for the physical network or are not adequate to be able to detect the specific cause of packet losses in the physical network. Besides, there are few virtual …
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TinyTermite: A Secure Routing Algorithm
… replay and sinkhole attacks by lowering the packet loss from 88.5% to 32.9% with 12.7% normal packet loss. The experimental results also demonstrate that the TinyTermite provides high throughput and low latency. uspicion pheromone is added to Termite that defends against the selective …
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Adaptive delivery of real-time streaming video
… of the Internet and must be resilient to packet loss. This thesis examines these challenges and presents a system design and implementation that ameliorates some of the important problems with video streaming over the Internet. Video sequences are typically compressed in a format such as …
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Performance enhancements in next generation wireless networks using network coding : a case study in WiMAX
… intra-session random linear network coding as a packet erasure code below the IP layer. Using WiMAX as a case study, a series of point-to-point single-interface experiments are conducted to compare the performance of the architecture to that of HARQ and ARQ mechanisms. The performance measures …
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Single queue priority scheduler for video transmission in IEEE 802.11 networks
… The challenges range from handover, delay, packet loss, jitter, fading and signal loss. Some studies have suggested an increase in network resources as a way to cater for the huge demands and reduce congestion in the network, while others suggest that optimizing the available resources might …
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Intra-domain mobility management
… Fast handoff, low signaling overhead and packet loss are the key factors to be addressed in designing a mobility management protocol. This work proposes Intra Domain Mobility Management (IDMM) protocol, based on micro-mobility concept. The protocol implements an efficient tracking …
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Transmission of Speech in Packet-Switched Networks
Packet switching speech not only allows straightforward multiplexing of speech and data, but also enables efficient use to be made of transmission capacity. This thesis shows how the transmission efficiency of a packet-switched speech network can be optimized. To do this, an analytical model of the …
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Buffer management and cell switching management in wireless packet communications
… buffer management and the cell switching (e.g., packet handoff) management using buffer management scheme are studied in Wireless Packet Communications. First, a throughput improvement method for multi-class services is proposed in Wireless Packet System. Efficient traffic management schemes …
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Optimizing Routing Strategy in Software Defined Networking
… has led to increased latency, congestion, and packet loss rates. This project aims to develop an optimized routing strategy for Software Defined Networking (SDN) that leverages machine learning techniques to enhance network traffic management's adaptability and efficiency. The project employs a …
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Controller design for underwater vehicle systems with communication constraints
… bring challenges such as delays, low data rates, packet loss, and scheduling constraints. To address these challenges, this thesis presents contributions towards multi-vehicle feedback control in the presence of severe communication constraints. The first major area of work considers the …
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Proactive methods for measurement of available bandwidth and link capacity
… e.g., available bandwidth, link capacity, delay, packet loss and jitter, provides a positive impact for effective traffic engineering, Quality-of-Service (QoS) routing, optimization of end-to-end transport performance, and link capacity planning. For network measurement, there exists several …
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A secure radio-frequency assistive listening device for hard of hearing people
… Digitized speech samples are grouped into packets and transmitted using the TCP/IP protocol. The packet error rates of the device measured under some typical environment are presented. The degradation of intelligibility under packet loss conditions is also presented. It is shown that speech …
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Single-ended non-intrusive speech quality monitoring in VoIP
… in VoIP, including temporal clipping, echo, packet loss and noise, are investigated in the thesis.To model the effects of temporal clipping on speech quality, an algorithm based on the clipping statistics is developed, with different weighting factors assigned to different clipping locations. …
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Free-space optical networks : fade and interference mitigation and network congestion control
… due to drastic reduction of its rate when its packets do not get received through the outage. We consider a class of TCP-based protocols that is better suited for free-space optical networks. In particular, the protocols in this class have the sender distinguish whether a packet loss is due to …
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Efficient delivery of scalable media streaming over lossy networks
… shared bandwidth and relatively high error loss rates, thus presenting a challenge for the efficient delivery of high quality video. Additionally, mobile devices can support/demand a range of video resolutions and qualities. This demand for mobile streaming highlights the need for adaptive …
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Error control for scalable image and video coding
… to transmit image and video signals over lossy networks, such as the Internet and wireless networks. However, scalability alone is not a complete solution since there is a conflict between the unequal importance of the scalable bit stream and the agnostic nature of packet losses in the …
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Error Concealment for Robust Image and Video Transmissions on the Internet
Likewise, delay and packet loss are two primary concerns for image transmissions. Existing approaches for delivering single-description coded images by TCP give superior quality but very long delays when the network is unreliable. To reduce delays, we have proposed to use UDP to deliver …
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