Joint channel selection and optimal power allocation for multi-cell D2D communications underlaying cellular networks

2017 ◽  
Vol 11 (5) ◽  
pp. 746-755 ◽  
Author(s):  
Haitham H. Esmat ◽  
Mahmoud M. Elmesalawy ◽  
Ibrahim I. Ibrahim
Keyword(s):  
Power Allocation ◽  
Cellular Networks ◽  
Channel Selection ◽  
Optimal Power Allocation ◽  
D2d Communications ◽  
Optimal Power ◽  
Joint Channel

scholarly journals Secure Communication for Uplink Cellular Networks Assisted with Full-Duplex Device-to-Device User

2020 ◽  
Vol 12 (10) ◽  
pp. 175
Author(s):  
Xin Song ◽  
Lin Xia ◽  
Siyang Xu ◽  
Yue Wang
Keyword(s):  
Power Allocation ◽  
Cellular Networks ◽  
Secure Communication ◽  
Full Duplex ◽  
Closed Form Expression ◽  
Optimal Power Allocation ◽  
Secrecy Rate ◽  
Optimal Power ◽  
Device To Device ◽  
Allocation Factor

In this paper, the secure communication based on the full-duplex (FD) device-to-device (D2D) in cellular networks is proposed. For the proposed scheme, the novel model is established, in which a D2D user is played as a relay operating in FD mode to assist in the secure transmission of uplink information. Considering that the D2D user as a relay is untrusted, D2D link rate maximization is formulated with the constraint of secrecy rate, which ensures the security of uplink cellular networks. To cope with the optimization problem, the optimal power allocation factors of the cellular user (CU) and the D2D user are jointly optimized. Firstly, by using the monotonicity of the objective function, the optimal solution of the power allocation factor at the D2D user can be obtained. Subsequently, the closed-form expression of the optimal power allocation factor at the CU is derived and verified that the solution is the global minimum point. Simulation results verify that the proposed scheme has better output performance than the conventional scheme.

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