Authors:
Ahmed N. Elbattrawy
1
;
2
;
Ahmed H. Abd El-Malek
3
;
Sherif I. Rabia
1
;
4
and
Waheed K. Zahra
1
;
5
Affiliations:
1
Basic and Applied Sciences Institute, Egypt-Japan University of Science and Technology, Alexandria, Egypt
;
2
Department of Engineering Mathematics and Physics, Faculty of Engineering, Mansoura University, Dakahlia, Egypt
;
3
School of Electronics, Communications and Computer Engineering, Egypt-Japan University of Science and Technology, Alexandria, Egypt
;
4
Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, Egypt
;
5
Department of Engineering Physics and Mathematics, Faculty of Engineering, Tanta University, Tanta, Egypt
Keyword(s):
Cognitive Radio, Hybrid Channel Access, Cooperative Communication, DoS Attack, Jamming Attack, POMDP.
Abstract:
In this paper, we investigate the performance of the primary user (PU) in a cognitive radio network under denial of service (DoS) attack. A cooperation scheme between the PU and an energy-constrained secondary user (SU) is proposed to mitigate the DoS attack effect on the PU, meanwhile, efficiently utilize the spectrum by allowing the SU to access the PU’s spectrum in a hybrid underlay/overlay mode. Hence, a mutual benefit is achieved. To maintain its sustainability, the SU harvests energy from ambient sources. The location of the SU is optimized to maximize the PU performance. In addition, the PU sequential decision to cooperate with the SU or not is formulated as a multi-objective mixed-observable Markov decision process (MOMDP) to consider the performance of both the PU and the SU on the long run. Then, an optimal decision policy is obtained by solving the decision problem using a point-based value iteration (PBVI) algorithm with predetermined scalarization weights. The simulation
results show the efficiency of the proposed scheme in enhancing the PU performance at different jamming levels.
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