Novel power control and collision resolution schemes for device-to-device discovery

Device-to-Device (D2D) communications allow devices to communicate directly without going through infrastructure. It is considered a promising solution to improve communication performance and network capacity of LTE-Advanced system. In addition, the direct proximity communication implies reduced delay and energy consumption. However, from the perspective of D2D networks, co-existence of multiple D2D User Equipments (UEs) is a challenging issue because of the proximity interference management, especially, without a central controller in a distributed scheme. In this article, we propose a novel distributed power control and collision resolution schemes, which can enhance discovery success of proximity devices conforming to LTE-A networks. The simulation results demonstrate that our proposed schemes can significantly improve the performance of discovery success and detectable coverage by mitigating D2D interference.