scholarly journals Full-Duplex Relay for Millimeter Wave Vehicular Platoon Communications

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6072
Author(s):  
Jong-Ho Lee ◽  
Jiho Song
Keyword(s):  
Power Allocation ◽  
Millimeter Wave ◽  
Full Duplex ◽  
Vehicular Communications ◽  
Power Constraint ◽  
Closed Form Solutions ◽  
Optimal Power ◽  
Vehicle Platoon ◽  
Lead Vehicle

The safety and consistency of platoon-based driving are guaranteed via reliable communication between vehicles in a platoon. In this paper, we propose to exploit a full-duplex (FD) relay vehicle for millimeter-wave vehicular communications in platoon-based driving. Considering that a lead vehicle broadcasts information to all vehicles in a platoon, we consider two power allocation problems—maximizing broadcast information rates with a power constraint and minimizing power consumption with a quality-of-service constraint. In particular, for a four-vehicle platoon communication, we derive closed-form solutions for optimal power allocation and present numerical results to verify the performance of the proposed FD relay vehicles.

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.

Full-Duplex Decode-and-Forward Relaying: Secrecy Rates and Optimal Power Allocation

2017 ◽  
Author(s):  
L. Elsaid ◽  
M. Ranjbar ◽  
N. Raymondi ◽  
D.H.N. Nguyen ◽  
N.H. Tran ◽  
...  
Keyword(s):  
Power Allocation ◽  
Full Duplex ◽  
Optimal Power Allocation ◽  
Decode And Forward ◽  
Optimal Power

scholarly journals Multiband Spectrum Sensing and Power Allocation for aCognitive Radio-Enabled Smart Grid

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8384
Author(s):  
Jun Wang ◽  
Weibin Jiang ◽  
Hongjun Wang ◽  
Yanwei Huang ◽  
Riqing Chen ◽  
...  
Keyword(s):  
Smart Grid ◽  
Power Allocation ◽  
Communication Technologies ◽  
Optimization Techniques ◽  
Secondary Users ◽  
Key Technology ◽  
Optimal Power ◽  
Detection Probabilities ◽  
Sensing Time

As part of an Internet of Things (IoT) framework, the Smart Grid (SG) relies on advanced communication technologies for efficient energy management and utilization. Cognitive Radio (CR), which allows Secondary Users (SUs) to opportunistically access and use the spectrum bands owned by Primary Users (PUs), is regarded as the key technology of the next-generation wireless communication. With the assistance of CR technology, the quality of communication in the SG could be improved. In this paper, based on a hybrid CR-enabled SG communication network, a new system architecture for multiband-CR-enabled SG communication is proposed. Then, some optimization mathematical models are also proposed to jointly find the optimal sensing time and the optimal power allocation strategy. By using convex optimization techniques, several optimal methods are proposed to maximize the data rate of multiband-CR-enabled SG while considering the minimum detection probabilities to the active PUs. Finally, simulations are presented to show the validity of the proposed methods.

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