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Joint Power Control and Channel Assignment in D2D Communication System

Xin Song, Xiuwei Han, and Siyang Xu
Engineering Optimization and Smart Antenna Institute, Northeastern University, Qinhuangdao and 066004, China

Abstract—D2D communication has been proposed as an effective way to improve the spectrum utilization of the cellular network. In this paper, we study resource allocation problem to maximize the overall system capacity while maintaining the signal-to-noise ratio for D2D users and Cellular Users (CUs). The optimization problem can be broken down into two sub-problems: power control and channel assignment. We first prove that the objective function of power control problem is a convex function to get the optimal transmit power. Then, we designed two search algorithms for channel assignment. The numerical results can show that, compared with the random selection algorithm, our schemes can improve the performance of the system.
Index Terms—Device-to-device, load mode, power control, channel assignment, system capacity

Cite: Xin Song, Xiuwei Han, and Siyang Xu, "Joint Power Control and Channel Assignment in D2D Communication System," Journal of Communications, vol. 14, no. 5, pp. 349-355, 2019. Doi: 10.12720/jcm.14.5.349-355