A Resource Allocation Scheme Based on Improved Bat Algorithm for D2D Communication System

In this paper, the resource allocation problem for device-to-device (D2D) communications underlaying cellular networks is formulated. In our scenario, the number of D2D user equipment is considered to be much larger than the number of mobile user equipment. Multiple D2D users can share one channel resource which is allocated to one mobile user equipment. First, a system model is established and the resource allocation problem is converted into a combinatorial optimization problem. Then, a resource allocation scheme based on the improved bat algorithm is proposed, which solves the problem of being easily getting into a local optimum solution in basic bat algorithm. Finally, the simulation results show that the performance of the proposed improved bat algorithm is better than the basic bat algorithm and the random algorithm. This scheme can provide good optimization for resource allocation in D2D communication system.