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 32 for “"Cross-layer design"”.
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Cross-layer design for wireless sensor relay networks
… processing and communication elements and is designed in some degree to monitor the environmental events specified by the end user of the network. Information about the environment is gathered by sensors and delivered to a remote collector. This research conducts an investigation with respect …
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Cross-layer design of random access wireless networks
… communication which leads to various unique design challenges for wireless networks. Wireless medium access control (MAC) has to be specifically designed to resolve contention in the presence of interference. As a result, an important technique, the random access protocol, has emerged to …
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Cross-layer design for network performance optimization in wireless networks
… the end-to-end delay. This scheduling scheme is designed based on integer linear programming and involves interference modeling. Using this schedule, there are no conflicting transmissions at any time. Through simulation, it shows that the proposed link scheduling scheme can significantly reduce …
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An Energy Efficient Cross Layer Design Scheme for Wireless Sensor Networks
… focused on energy awareness at different network layers in WSNs. Furthermore, most of the proposed techniques are based on protocols for mobile ad hoc networks that do not look into the possibility of a cross-layer design strategy that can exploit the unique features of WSNs. There still exists …
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Unified cross-layer framework: a generic platform for cross-layer design experimentation
Cross-layer designs in wireless network systems have been an active research area. Numerous cross-layer schemes are proposed to improve overall system performance by allowing information to be shared and controlled across protocol layers. However, much of the previous research work in this area is …
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Analysis and Cross -Layer Design of Medium Access and Scheduling in Wireless Mesh Networks
Due to the characteristics of wireless PHY/MAC, cross-layer design is needed to achieve good performance in multihop wireless mesh networks. We propose a cross-layer scheme to coordinate the operations of different layers in IEEE 802.16 backhaul mesh networks where the nodes are equipped with …
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Cross-layer design with multi-packet reception, MAC, and network coding in multi-hop networks
A cross-layer design approach is proposed that can be used to optimize the cooperative use of multi-packet reception (MPR) and network coding. A simple and intuitive model is constructed for the behavior of an opportunistic network coding scheme called COPE proposed by Katti et. al., MPR, the …
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Improving the Capacity in Wireless Ad Hoc Networks through Multiple Channel Operation: Design Principles and Protocols
… I propose three principles that facilitate the design of efficient distributed channel assignment protocols. Distributed channel assignment problems have been proven to be <i>NP</i>-complete and, thus, computationally intractable. Though being a subject of many years of research, distributed …
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Low Complexity Scheduling in Wireless Networks
… is an important bottleneck in the efficient design and controlof wireless networks. Owing to the high computational complexity of throughputoptimallink schedulers, low-complexity schedulers such as Greedy Maximal Scheduling(GMS)that often yield good throughput performance have received …
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Energy-efficient architectures for chip-scale networks and memory systems using silicon-photonics technology
… transfers. This tight energy budget impacts the design of both chip-scale networks and main memory systems. Conventional electrical links used in chip-scale networks (0.5-3pJ/bit) and DRAM systems used in main memory (>30pJ/bit) fail to provide sustained performance at low energy budgets. This …
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Towards next generation WLANs: exploiting coordination and cooperation
… In this thesis we propose several MAC/PHY layer protocols and schemes that will provide more system throughput, lower packet delivery delay and lessen the power consumption of mobile devices. Our work investigates three approaches that lead to improved WLAN performance: 1) cross-layer …
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Cross-layer Control for Adaptive Video Streaming over Wireless Access Networks
… a wireless networking competition that we designed and hosted, which included creation and operation of ad hoc networks using commodity hardware. However, the lack of software tools to facilitate these sorts of experiments has created new challenges. Currently, researchers must practice …
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Algorithms and Optimization for Wireless Networks
… techniques have been developed at the physical layer. For both theoretical and practical purposes, it is important for a network researcher to understand the performance limits of these new wireless networks. Such performance limits are important not only for theoretical understanding, but also …
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On Throughput Maximization in a Multi-hop MIMO Ad Hoc Network
… multiple-output), as an advanced physical layer technology, has been employed in multi-hop wireless networks to increase throughput with a given bandwidth or transmit power. It exploits the use of multiple antennas at the transmitter and receiver to increase spectral efficiency by …
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Deep-learning-based transport layer control for big data transmission over UAV swarming networks
… directional antennas. Most of the transport layer control schemes used in MBSA-equipped networks are based on TCP, which are too conservative since they indiscriminately reduce the window size upon any kind of packet loss. To adapt to the features of the MBSA-based networks, this work …
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Resource allocation in coordinated multipoint long term evolution-advanced networks
… (LRA), Optimized Resource Allocation (ORA) and Cross-Layer Design of ORA (CLD-ORA). The LRA algorithm is a three-step resource allocation scheme that consists of user selection module, subcarrier allocation module and power allocation module which are performed sequentially in a multi-antenna …
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Enhancing spectrum utilization through cooperation and cognition in wireless systems
… it introduces four new systems that embody a cross-layer design for cognition and cooperation. The first system, SWIFT, is a cognitive cross technology solution that enables wideband devices to exploit higher layer network semantics to adaptively sense which portions of the spectrum are …
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MIMO-aware Medium Access Control in IEEE 802.11 Networks
… like WMNs, the Medium Access Control (MAC) layer is considered very important in the IEEE 802.11-based wireless networks, as it supports many crucial operational functions. Hence, QoS support in WMNs can be enhanced through the efficient cross-layer design of MAC protocols that utilizes …
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MIMO Wireless Networks: Modeling and Optimization
… is relatively well-understood nowadays, network design and performance optimization for MIMO-based wireless networks is considerably more challenging. Many fundamental problems remain unsolved. Due to the complex characteristics of MIMO physical layer technology, it is not only desirable but also …
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