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 6 of 6 for “"MAC Schemes"”.
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Power evaluation and performance enhancement of CSMA/CA based WLANs.
… two decentralized Multiple Access Control (MAC) schemes that converge to collision-free schedules almost surely and therefore improve throughput performance. In adopting decentralized learning techniques, the convergence times of both schemes are brief. Decentralized schedule length adaption …
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An Energy-Efficient Medium Access Control Protocol for Wireless Sensor Networks "V-MAC"
… thesis, we focus on the Medium Access Control (MAC) layer in WSNs. We propose a MAC scheme, V-MAC, for WSNs that extends that lifetime of the network. We compare V-MAC with other MAC schemes. V-MAC uses a special mechanism to divide sensors in different groups and then all the members of a group …
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Efficient forward error correction coding technique for spread spectrum communications
… specification) and GPS driven non-standard MAC schemes. The design and testing of this coding scheme is a part of MYMAR, a new Mobile Yellow page Messaging And Retrieval system, which is based on GPS driven slow frequency hopping access. The main contributions of this thesis are the …
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Design of Media Access Control Schemes for Performance Enhancement of Future Generation Wireless Systems
… devices utilize a complex medium access control (MAC) mechanism to allow multiple users to share the wireless resource. The distributed coordination function (DCF) is the most commonly used multiple access scheme in WLANs and a member of the 802.11 standard [1]. In this thesis, two major roles of …
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Directional UAV swarming: a network perspective
… In Chapter 2, we will design a novel 2-layer MAC: We will design the upper MAC layer, which supports the synchronized, concurrent multi-beam transmission/receiving, as well as the lower MAC layer that is back compatible to 802.11 but fully explores the benefits of multi-beam antennas; We …
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Energy and Spectral Efficient Wireless Communications
… health monitoring (SHM), medium access control (MAC) for multi-user systems, and cooperative spectrum sensing in cognitive radio systems.</p> <p>First, to improve the energy efficiency in SHM WSN, a new ultra low power (ULP) WSN is proposed to monitor the vibration properties of structures such …