Title :
Secure resource allocation in OFDMA-based cognitive radio networks with two-way relays
Author :
Alavi, Faezeh ; Mokari, Nader ; Saeedi, Hamid
Author_Institution :
Sch. of Electr. & Comput. Eng., Tarbiat Modares Univ., Tehran, Iran
Abstract :
In this paper, we consider a two-way cooperative communication framework to provide secure communications for secondary users within an Orthogonal Frequency-Division Multiple Access (OFDMA) based underlay cognitive network. By proposing a radio resource allocation problem with the aim of maximizing the secrecy sum-rate of secondary users and solving it, we show that deployment of relays is vital to achieve a non-zero secrecy sum rate. Also, impact of two-way relay in system performance improvement is clearly visible in comparison with one-way relay such that it can roughly double the resulting system secrecy sum-rate. The impact of different system parameters on the achievable secrecy sum rate for both one-way and two-way relay is also investigated and compared through simulations.
Keywords :
OFDM modulation; cognitive radio; cooperative communication; frequency division multiple access; relay networks (telecommunication); telecommunication scheduling; telecommunication security; OFDMA based cognitive radio networks; orthogonal frequency division multiple access; radio resource allocation problem; relay deployment; secondary user secure communication; secondary user sum-rate; secure resource allocation; two way cooperative communication; two way relays; underlay cognitive network; Cognitive radio; Electrical engineering; Interference; Protocols; Relays; Resource management; System performance; Physical (PHY) layer security; Two-way communication; cognitive radio networks; decode-and-forward relay;
Conference_Titel :
Electrical Engineering (ICEE), 2015 23rd Iranian Conference on
Conference_Location :
Tehran
Print_ISBN :
978-1-4799-1971-0
DOI :
10.1109/IranianCEE.2015.7146204
