TY - JOUR
T1 - Cooperative Energy Harvesting Cognitive Radio Networks with Spectrum Sharing and Security Constraints
AU - Bouabdellah, Mounia
AU - El Bouanani, Faissal
AU - Sofotasios, Paschalis C.
AU - Muhaidat, Sami
AU - Da Costa, Daniel Benevides
AU - Mezher, Kahtan
AU - Ben-Azza, Hussain
AU - Karagiannidis, George K.
N1 - Funding Information:
This work was supported in part by the Khalifa University of Science and Technology under Grant KU/RC1-C2PS-T2/8474000137 and Grant KU/FSU-8474000122.
Publisher Copyright:
© 2013 IEEE.
PY - 2019
Y1 - 2019
N2 - Physical layer security is an important and timely topic in the research of future wireless systems and it constitutes a part of the Internet of Things (IoT) notion. IoT oriented systems are largely characterized by a stringent quality of service and enhanced security requirements, which comes at a cost of increased computational complexity that needs to be maintained within sustainable levels. In the present contribution, we investigate the physical-layer security of a dual-hop energy RF-Powered cognitive radio network over realistic multipath fading conditions. Assuming a spectrum sharing scenario, our analysis assumes that a source S communicates with a destination D with the aid of a multi-antenna relay R and in the presence of an eavesdropper E who is attempting to overhear the communication of both S-R and R-D links. The involved relay is powered by the renewable energy harvested from the signal sent by the source based on the power-splitting energy harvesting strategy. Furthermore, the relay uses a maximum ratio combining technique to process effectively the received signals. In addition, owing to the underlying strategy, both S and R adjust their respective transmit powers in order to avoid causing interference to the primary network. By considering both the independent identically distributed and the independent but not necessarily identically distributed flat Rayleigh fading channels, closed-form expressions for the secrecy outage probability are derived, based on which an asymptotic analysis is carried out. Our results quantify the impact of the main key system parameters and point out the optimal values ensuring a high-security performance of such a communication system. The validity of the derived results is verified extensively through comparisons with respective Monte Carlo simulation results and useful theoretical and technical insights are developed which are expected to be useful in the design of future cooperative CRNs.
AB - Physical layer security is an important and timely topic in the research of future wireless systems and it constitutes a part of the Internet of Things (IoT) notion. IoT oriented systems are largely characterized by a stringent quality of service and enhanced security requirements, which comes at a cost of increased computational complexity that needs to be maintained within sustainable levels. In the present contribution, we investigate the physical-layer security of a dual-hop energy RF-Powered cognitive radio network over realistic multipath fading conditions. Assuming a spectrum sharing scenario, our analysis assumes that a source S communicates with a destination D with the aid of a multi-antenna relay R and in the presence of an eavesdropper E who is attempting to overhear the communication of both S-R and R-D links. The involved relay is powered by the renewable energy harvested from the signal sent by the source based on the power-splitting energy harvesting strategy. Furthermore, the relay uses a maximum ratio combining technique to process effectively the received signals. In addition, owing to the underlying strategy, both S and R adjust their respective transmit powers in order to avoid causing interference to the primary network. By considering both the independent identically distributed and the independent but not necessarily identically distributed flat Rayleigh fading channels, closed-form expressions for the secrecy outage probability are derived, based on which an asymptotic analysis is carried out. Our results quantify the impact of the main key system parameters and point out the optimal values ensuring a high-security performance of such a communication system. The validity of the derived results is verified extensively through comparisons with respective Monte Carlo simulation results and useful theoretical and technical insights are developed which are expected to be useful in the design of future cooperative CRNs.
KW - Cognitive radio network
KW - energy harvesting
KW - interference
KW - maximum ratio combining
KW - physical layer security
KW - power splitting
KW - secrecy outage probability
UR - http://www.scopus.com/inward/record.url?scp=85076927895&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2019.2955205
DO - 10.1109/ACCESS.2019.2955205
M3 - Article
AN - SCOPUS:85076927895
SN - 2169-3536
VL - 7
SP - 173329
EP - 173343
JO - IEEE Access
JF - IEEE Access
M1 - 8910590
ER -
