Research Article
Joint Optimization over Sensing Time and Power Allocation in Cognitive Radio Networks based on Energy Efficiency
@INPROCEEDINGS{10.4108/icst.chinacom.2014.256234, author={Xia Wu and Jinling Xu and Ming Chen and Junbo Wang}, title={Joint Optimization over Sensing Time and Power Allocation in Cognitive Radio Networks based on Energy Efficiency}, proceedings={9th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2015}, month={1}, keywords={energy-efficient allocation}, doi={10.4108/icst.chinacom.2014.256234} }- Xia Wu
Jinling Xu
Ming Chen
Junbo Wang
Year: 2015
Joint Optimization over Sensing Time and Power Allocation in Cognitive Radio Networks based on Energy Efficiency
CHINACOM
IEEE
DOI: 10.4108/icst.chinacom.2014.256234
Abstract
In this paper, we consider a joint optimization of sensing parameter and power allocation for an energy-efficient cognitive radio network (CRN) in which the primary user (PU) is protected. The optimization problem to maximize the energy efficiency of CRN is formulated as a function of two variables, which are sensing time and transmit power, subject to the average interference power to the PU and the target detection probability. During the optimizing process, the quality of service parameter (the minimum rate acceptable to secondary users (SUs)) has also been taken into consideration. The optimal solutions are analyzed and an algorithm combined with fractional programming that maximizes the energy efficiency for CRN is presented. Numerical results show that the performance improvement is achieved by the joint optimization of sensing time and power allocation.