Joint power control and spectrum access in cognitive radio networks

Cognitive Radio (CR) is proposed to overcome the problem of spectrum underutilization and congestion caused by the increasing demand of wireless services and applications. It is still a challenge to improve the spectrum efficiency of the secondary network for Secondary (unlicensed) Users (SUs) and a...

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Veröffentlicht in:Journal of network and computer applications Jg. 41; S. 379 - 388
Hauptverfasser: Song, Qingyang, Ning, Zhaolong, Huang, Yang, Guo, Lei, Lu, Xiaobing
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Kidlington Elsevier Ltd 01.05.2014
Elsevier
Schlagworte:
Algorithmics. Computability. Computer arithmetics
Applied sciences
Cognitive radio (CR) networks
Computer science; control theory; systems
Computer systems and distributed systems. User interface
Differential evolution (DE)
Dynamic spectrum access (DSA)
Equipments and installations
Exact sciences and technology
Mobile radiocommunication systems
Power control
Radiocommunications
Software
Telecommunications
Telecommunications and information theory
Theoretical computing
Wireless networks
Cognitive radio (CR) networks
Dynamic spectrum access (DSA)
Wireless networks
Power control
Differential evolution (DE)
Evolutionary algorithm
Equity
Distributed system
Power allocation
Efficiency
Differential evolution
Wireless network
Transmission rate
Cooperative game
Mathematical programming
Software radio
Power spectrum
ISSN:1084-8045, 1095-8592
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Beschreibung
Zusammenfassung:Cognitive Radio (CR) is proposed to overcome the problem of spectrum underutilization and congestion caused by the increasing demand of wireless services and applications. It is still a challenge to improve the spectrum efficiency of the secondary network for Secondary (unlicensed) Users (SUs) and avoid imposing interference to the Primary (licensed) Users (PUs). In this paper, we propose a joint power control and spectrum access scheme for the CR network. By addressing the power allocation problem and exploiting a Dynamic Spectrum Access (DSA) scheme (which is based on the power allocation and also aims at improving the secondary network throughput) from a cooperative-game perspective, our joint scheme can improve the throughput of the secondary network and guarantee the SUs׳ fairness, without imposing overlarge interference to the PUs. Numerical results reflect that, compared with previous studies, our joint power control and spectrum access scheme presents advantages in comprehensive performance (e.g., spectrum efficiency, fairness and throughput). Beyond a theoretical framework, we solve the optimization problem with the Differential Evolution (DE) algorithm which is more feasible to be implemented in practice.
ISSN:1084-8045
1095-8592
DOI:10.1016/j.jnca.2014.02.005