Abstract
Cognitive radio (CR) has been extensively investigated in the past decade to tackle the contradiction between wireless spectrum shortage and underutilization. In this paper, we present a unified analytical framework to design PHY-layer spectrum sensing and MAC-layer resource scheduling jointly for CR networks. A key parameter, named sensing confidence level (SCL), is introduced to characterize the presence of imperfect sensing, and bridge the designs between kinds of spectrum sensing schemes and resource allocation algorithms. The SCL-based joint design of spectrum and power allocation is formulated as a mixed integer non-linear optimization problem and Lagrange duality theory is introduced to make the problem tractable. The proposed joint design framework in this paper provides a baseline for comparing different spectrum sensing schemes plus bandwidth and power allocation algorithms. Numerical results demonstrate the effectiveness of the proposed framework.
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Abbreviations
- CSS:
-
Cooperative spectrum sensing
- CR:
-
Cognitive radio
- PN:
-
Primary network
- CRN:
-
Cognitive radio network
- SU:
-
Secondary user
- PU:
-
Primary user
- SSI:
-
Soft sensing information
- HSI:
-
Hard sensing information
- RSI:
-
Raw sensing information
- SBS:
-
secondary base station
- LHGH:
-
Local one-bit hard decision and global one-bit hard decision
- LHGS:
-
Local one-bit hard decision and global soft fusion
- LSGS:
-
local soft sensing and global soft fusion
- CSI:
-
Channel state information
- SCL:
-
Sensing confidence level
- SEP:
-
Sensing error percentage
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Acknowledgments
The authors would like to thank the associate editor and the anonymous reviewers for their precious time and constructive comments, which have greatly improved the quality of this article. This work was supported in part by the National Basic Research Program of China (No. 2009CB320400), the National Natural Science Foundation of China (Nos. 60932002 and 6117206), and the Natural Science Foundation of Jiangsu, China (No. BK2011116).
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Ding, G., Wu, Q. & Wang, J. Sensing Confidence Level-Based Joint Spectrum and Power Allocation in Cognitive Radio Networks. Wireless Pers Commun 72, 283–298 (2013). https://doi.org/10.1007/s11277-013-1013-3
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DOI: https://doi.org/10.1007/s11277-013-1013-3