Journal ArticleDOI
Optimal Probabilistic Initial and Target Channel Selection for Spectrum Handoff in Cognitive Radio Networks
TLDR
A probabilistic approach in determining the initial and target channels for the handoff procedure in a single secondary user network is proposed and results confirm the validity of the analytical approach.Abstract:
Spectrum mobility in cognitive radio networks not only enables the secondary users to guarantee the desired QoS of the primary users but also grants an efficient exploitation of the available spectrum holes in the network. In this paper, we propose a probabilistic approach in determining the initial and target channels for the handoff procedure in a single secondary user network. To characterize the network, a queuing theoretical framework is introduced, and “stay” and “change” handoff policies are both addressed. The performance of the secondary user in terms of average sojourn and extended service times for secondary connections is analyzed, and convex optimization problems with the objective of minimizing those times as well as analytical solutions are presented. Simulation results confirm the validity of our analytical approach.read more
Citations
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Journal ArticleDOI
Spectrum handoff in cognitive radio networks
TL;DR: A detailed classification and comprehensive survey of existing spectrum handoff schemes for cognitive radio networks is presented and various research issues and challenges are presented which require the attention of the researchers.
Journal ArticleDOI
QoE-Driven Channel Allocation and Handoff Management for Seamless Multimedia in Cognitive 5G Cellular Networks
TL;DR: This paper develops a priority-based channel allocation scheme to assign channels to the mobile stations based on their QoE requirements, and proposes a handoff management technique to overcome the interruptions caused by the handoff.
Journal ArticleDOI
Cognitive radios: A survey on spectrum sensing, security and spectrum handoff
TL;DR: This paper surveys state-of-the-art research on spectrum sensing and security threats in Cognitive radios and considers the analysis of issues related to spectrum handoffs in cognitive radios.
Journal ArticleDOI
An Optimized Hybrid Approach for Spectrum Handoff in Cognitive Radio Networks With Non-Identical Channels
TL;DR: An analytical model for the general case of non-identical channels in CR networks is introduced for both fixed and probabilistic sequence approaches for target channel selection and a fast hybrid approach is proposed and found to achieve near optimal solution.
Journal ArticleDOI
Intelligent Process of Spectrum Handoff/Mobility in Cognitive Radio Networks
TL;DR: The reasons and mechanisms of spectrum handoff are described, protocols developed and the proposed method performed better than the pure reactive handoff method, and a comparison between the different methods is made.
References
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Book
Convex Optimization
Stephen Boyd,Lieven Vandenberghe +1 more
TL;DR: In this article, the focus is on recognizing convex optimization problems and then finding the most appropriate technique for solving them, and a comprehensive introduction to the subject is given. But the focus of this book is not on the optimization problem itself, but on the problem of finding the appropriate technique to solve it.
Journal ArticleDOI
Cognitive radio: brain-empowered wireless communications
TL;DR: Following the discussion of interference temperature as a new metric for the quantification and management of interference, the paper addresses three fundamental cognitive tasks: radio-scene analysis, channel-state estimation and predictive modeling, and the emergent behavior of cognitive radio.
Journal ArticleDOI
Cognitive radio: making software radios more personal
TL;DR: With RKRL, cognitive radio agents may actively manipulate the protocol stack to adapt known etiquettes to better satisfy the user's needs and transforms radio nodes from blind executors of predefined protocols to radio-domain-aware intelligent agents that search out ways to deliver the services the user wants even if that user does not know how to obtain them.
Journal ArticleDOI
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
TL;DR: The novel functionalities and current research challenges of the xG networks are explained in detail, and a brief overview of the cognitive radio technology is provided and the xg network architecture is introduced.
Journal ArticleDOI
A survey on spectrum management in cognitive radio networks
TL;DR: Recent developments and open research issues in spectrum management in CR networks are presented and four main challenges of spectrum management are discussed: spectrum sensing, spectrum decision, spectrum sharing, and spectrum mobility.