Joint channel allocation and power control based on PSO for cellular networks with D2D communications

Introducing D2D communications into wireless cellular networks is viewed as a potential method to relieve the increasing traffic in the base stations. However, the cellular users will suffer from high interference without efficient interference management scheme. In this paper, we study two joint channel allocation and power control problems with different constraints, and propose a joint channel allocation and power control scheme based on Particle Swarm Optimization (PSO) to efficiently manage interference and improve the network throughput. The proposed scheme deals with continuous powers and discrete channels simultaneously. By carefully designing the fitness values for the two problems, the algorithm avoids trapping into infeasible solutions. Numerous simulations show that the proposed algorithm could improve the network throughput in cellular networks with D2D communications, and the algorithm outperforms the compared non-joint interference management algorithm in terms of D2D throughput, cellular throughput, and further the overall network throughput.