Open AccessDissertation
A framework for evaluating proposed technologies for next-generation wireless systems
TLDR
A framework for evaluating proposed technologies for next-generation wireless systems, using systems modelling approaches, mixes hard systems modelling into a soft approach providing a method for managing complexity and facilitating learning points for the development of future wireless systems.Abstract:
This thesis presents a framework for evaluating proposed technologies for next-generation wireless systems, using systems modelling approaches. First, the socio-economic system is explored addressing the challenging question of how to develop a strategy for research investment in the complex development space of Fifth Generation (5G) era technologies. By the application of Problem Structuring Methods, and focusing on developing a clearer understanding of the industry landscape, a methodology for strategic decision making is proposed. The approach is used to identify key areas of wireless technology research for the 5G era. Subsequently, identified key areas of wireless technology including, full-duplex, beamforming, clear channel assessment and transmission power adaptation are explored in single and multi-hop wireless networks. A novel conceptual simulation modelling methodology is proposed and applied to investigate the performance impact of these technologies when implemented in the context of Carrier Sense Multiple Access with Collision Avoidance wireless networks. The methodology is designed to aid researchers in the environment of a corporate research and development lab with the goal of developing innovations and intellectual property that can bring commercial success. Whilst each technology is capable in principle of improving system performance, often the gain is limited when implementing in a network environment. The methodology is used to propose strategies for maximising performance gain with quantitative results to support the conclusions. The framework mixes hard systems modelling into a soft approach providing a method for managing complexity and facilitating learning points for the development of future wireless systems.read more
Citations
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Journal ArticleDOI
IEEE 802.11ax: High-Efficiency WLANs
TL;DR: The expected future WLAN scenarios and use cases that justify the push for a new PHY/MAC IEEE 802.11ax-2019 amendment are reviewed and a set of new technical features that may be included are overviewed.
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Insensitivity and stability of random-access networks
TL;DR: It is shown that the stationary distribution of the CSMA system is in fact insensitive with respect to the transmission durations and the back-off times, and the stability conditions in a few relevant scenarios are identified.
References
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Proceedings ArticleDOI
IEEE 802.11ax: Next generation wireless local area networks
TL;DR: The IEEE 802.11ax standardization activities in progress are summarized and an overview of the most important features proposed are presented, toward a new era of wireless LANs.
Journal ArticleDOI
A comparison of active queue management algorithms using the OPNET Modeler
TL;DR: The study shows that, among the four algorithms, SIZED and DRED are more effective at stabilizing the queue size and controlling the packet loss rate while maintaining high link utilization.
Proceedings ArticleDOI
Interference analysis of nonpersistent CSMA with hidden terminals in multicell wireless data networks
TL;DR: A theoretical analysis is introduced to evaluate CSMA in multicell wireless networks by taking hidden terminals, interference, and cell-overlapping into account.
Proceedings ArticleDOI
RTS/FCTS mechanism based full-duplex MAC protocol for wireless networks
TL;DR: A novel request to send (RTS)/full-duplex clear to sent (FCTS) based MAC protocol which can support both bidirectional and unidirectionallinks in wireless full-duple networks and can achieve superior system throughput as compared with that of the conventional half-du Plex MAC protocol for wireless networks is proposed.
Book
NASA Systems Engineering Handbook
nasa,Garrett Shea +1 more
TL;DR: This handbook is intended to provide general guidance and information on systems engineering that will be useful to the NASA community and provides a generic description of Systems Engineering as it should be applied throughout NASA.