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AuthorAshour, Mahmoud
AuthorButt, Muhammad Majid
AuthorMohamed, Amr
AuthorElBatt, Tamer
AuthorKrunz, Marwan
Available date2021-09-01T10:02:41Z
Publication Date2016
Publication NameIEEE Transactions on Communications
ResourceScopus
URIhttp://dx.doi.org/10.1109/TCOMM.2016.2581814
URIhttp://hdl.handle.net/10576/22353
AbstractIn this paper, we study and analyze cooperative cognitive radio networks with arbitrary number of secondary users (SUs). Each SU is considered a prospective relay for the primary user (PU) besides having its own data transmission demand. We consider a multi-packet transmission framework that allows multiple SUs to transmit simultaneously because of dirty-paper coding. We propose power allocation and scheduling policies that optimize the throughput for both PU and SU with minimum energy expenditure. The performance of the system is evaluated in terms of throughput and delay under different opportunistic relay selection policies. Toward this objective, we present a mathematical framework for deriving stability conditions for all queues in the system. Consequently, the throughput of both primary and secondary links is quantified. Furthermore, a moment generating function approach is employed to derive a closed-form expression for the average delay encountered by the PU packets. Results reveal that we achieve better performance in terms of throughput and delay at lower energy cost as compared with equal power allocation schemes proposed earlier in the literature. Extensive simulations are conducted to validate our theoretical findings. 2016 IEEE.
Languageen
PublisherInstitute of Electrical and Electronics Engineers Inc.
SubjectBeamforming
Cognitive radio
Power management
Throughput
Wireless networks
Cognitive relaying
Cooperative Cognitive Radio Networks
Cooperative wireless networks
delay
Moment generating function
Opportunistic communications
Opportunistic relay selections
Relay selection
Power management (telecommunication)
TitleEnergy-Aware Cooperative Wireless Networks with Multiple Cognitive Users
TypeConference Paper
Pagination3233-3245
Issue Number8
Volume Number64


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