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Multi-User Opportunistic Spectrum Access for Cognitive Radio Networks Based on Multi-Head Self-Attention and Multi-Agent Deep Reinforcement Learning [PDF]
SensorsAiming to address the issue of multi-user dynamic spectrum access in an opportunistic mode in cognitive radio networks leading to low sum throughput, we propose a multi-user opportunistic spectrum access method based on multi-head self-attention and ...
Weiwei Bai +4 more
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EURASIP Journal on Advances in Signal Processing, 2010 We consider a cognitive radio system with one primary channel and one secondary user, and then we introduce a channel-usage pattern model and a fundamental access scheme in this system.
Jing Wang +4 more
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Reputation-Aware Relay Selection With Opportunistic Spectrum Access: A Blockchain Approach
IEEE Open Journal of Vehicular Technology, 2023 The highly dynamic nature of cognitive radio (CR) systems and their stringent latency requirements pose a significant challenge in the realization of efficient intelligent transport systems (ITS).
Esraa M. Ghourab +5 more
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IEEE Access, 2022 In this article, the spectrum trading problem between primary users and secondary networks is investigated. The secondary network requests multiple channels with the targeted availability to satisfy its users’ demands. Due to the uncertainty about
Mohamed Abdelraheem +1 more
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Modeling and analysis of opportunistic spectrum access schemes in cognitive cellular networks under imperfect sensing [PDF]
ITM Web of Conferences, 2022 Cognitive radio (CR) is an exciting technology to solve the spectrum scarcity problem in the future cellular networks. As the grade-of-service (GoS) performances directly reflect the user's experiences in the cognitive cellular networks (CCNs), the GoS ...
Zhang Lei, Duan Lili
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Throughput‐delay tradeoff for opportunistic spectrum access in cognitive radio networks
IET Communications, 2023 The internet of things accelerates the wireless connections of massive devices to provide all kinds of new services, and thus intensifies the spectrum scarcity and access delay. Cognitive radio (CR) technology brings a solution for the issue.
Jing Zhang +4 more
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Opportunistic Spectrum Access in Self-Similar Primary Traffic
EURASIP Journal on Advances in Signal Processing, 2009 We take a stochastic optimization approach to opportunity tracking and access in self-similar primary traffic. Based on a multiple time-scale hierarchical Markovian model, we formulate opportunity tracking and access in self-similar primary traffic as a ...
Xiangyang Xiao, Qing Zhao, Keqin Liu
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Blocking probability analysis of wireless sensors that employ opportunistic spectrum access
JOIV: International Journal on Informatics Visualization, 2017 Opportunistic accessing of vacant channels of licensed spectrum by non-licensed wireless devices offers a convenient solution to the spectrum scarcity problems experienced by many wireless communication systems.
Lingineni Anusha, B Seetha ramanjaneyulu
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Contention-Based Opportunistic Spectrum Access in One-Way Highway Vehicular Networks
IEEE Access, 2019 The spectrum sharing problem is considered under the scenario of a one-way highway vehicular network. We model the locations of the vehicle-to-vehicle (V2V) nodes, the vehicle-to-infrastructure (V2I) nodes, and the road side units (RSUs) as 1D Poisson ...
Xiaoshi Song, Mengying Yuan
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Optimal Pricing of Spectrum Resources in Wireless Opportunistic Access
Journal of Computer Networks and Communications, 2012 We consider opportunistic access to spectrum resources in cognitive wireless networks. The users equipment, or the network nodes in general are able to sense the spectrum and adopt a subset of available resources (the spectrum and the power) individually
Hanna Bogucka
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