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 16 of 16 for “"Wireless Broadcast"”.
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Securing Wireless Broadcast Communications against Internal Attacks
The pervasiveness of wireless communications in modern society is unprecedent. Using numerous wireless technologies, including cellular, WiFi, WiMax and others, users gain ubiquitous access to a wealth of information services relevant to their everyday lives. These include communication services …
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Understanding the interaction between reliability and wireless broadcast
… remains a key concern for both the wired and wireless communication networks of today. In this dissertation, we seek to understand the fundamental characteristics of the problem of reliable communication. We develop algorithms for reliable com- munication between a fault-free …
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Distributed construction of energy-efficient ad hoc wireless broadcast trees
We address the energy-efficient broadcasting problem in ad hoc wireless networks. First we show that finding the minimum energy broadcast tree is NP-complete and develop an approximation algorithm, which computes sub-optimal solutions in polynomial time. We present a distributed algorithm that …
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Network coding, multi-packet reception, and feedback : design tools for wireless broadcast networks
… address the combination of three technologies in wireless broadcast networks: network coding, multi-packet reception (MPR) and feedback. We will primarily discuss the performance of a single-hop network, both with and without these technologies. A single-hop network can be used as a building block …
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Exploiting wireless broadcast property to improve performance of distributed algorithms and mac protocols in wireless networks
Because a wireless channel is a shared medium, messages sent on the wireless links might be overheard by the neighboring stations. The information obtained from the overheard messages can be used in order to design more efficient distributed algorithms as well as MAC protocols for wireless …
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Multi-channel Mobile Access to Web Services
To support wireless-oriented services, a new generation of Web services called Mobile services (M-services) has emerged. M-services provide mobile users access to services through wireless networks. One of the important issues in M-service environment is how to discover and access M-services …
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Anonymity properties of two network coded gossip protocols
… proposed by Sergeev in 2013, eciently implements broadcast over unicast and requires no pre-existing infrastructure. We propose a second protocol, CHAP, which extends NCGAB and is designed to use wireless broadcast capabilities as well as wired links. We show anonymity for some …
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Coding and scheduling optimization over packet erasure broadcast channels
… scheme for one or more receivers in single hop wireless packet erasure broadcast channels. We capture the delay sensitivities across different types of network applications using a class of delay metrics based on the norms of packet arrival times. With these delay metrics, we establish a unified …
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Transmitter precoding for multi-antenna multi-user communications
Emerging wireless sensor networks and existing wireless cellular and ad hoc networks motivate the design of low-power receivers. Multi-user interference drastically reduces the energy efficiency of wireless multi-user communications by introducing errors in the bits being detected at the receiver. …
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Network coded wireless architecture
Wireless mesh networks promise cheap Internet access, easy deployment, and extended range. In their current form, however, these networks suffer from both limited throughput and low reliability; hence they cannot meet the demands of applications such as file sharing, high definition video, and …
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Novel Site-Specific Techniques for Predicting Radio Wave Propagation
… in space. However, to optimize the design of a wireless broadcast or a point to multi point system such as a Wireless LAN (WLAN) or a cellular system, propagation characteristics at multiple points in space need to be known. The standard ray tracing algorithms can be notoriously time consuming …
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Multipath routing and quality of service support for mobile ad hoc networks
… are a key part of the ongoing evolution of wireless communications. MANETs are a collection of wireless mobile nodes that dynamically form a temporary wireless network without an infrastructure. The design of an efficient and reliable routing scheme and Quality of Service (QoS) support for …
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New Method for Directional Modulation Using Beamforming: Applications to Simultaneous Wireless Information and Power Transfer and Increased Secrecy Capacity
… of connected embedded devices has driven wireless communications into commercial, military, industrial, and personal systems. It is unreasonable to expect privacy and security to be inherent in these networks given the spatial density of these devices, limited spectral resources, and the …
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Coding and scheduling in networks for erasures and broadcast
… in communication networks, namely erasures and broadcast. Erasures are an appropriate model for communication channels from a network layer perspective. A class of efficient and flexible codes known as fountain codes, is available to deal with erasures for the basic erasure channel. However, in …