Performance Evaluation of D2D Discovery with eNB Based Power Control in LTE-Advanced

Device to device (D2D) communication techniques is one of main themes for the next generation wireless communication techniques. Compared to traditional Wireless Wide Area Network (WAN) communication where all radio links are formed between a user equipment (UE) and a base station (eNB), D2D communication uses a direct link between two different UEs. In the standard organization, 3rd Generation Partnership Project (3GPP), there is an ongoing discussion to adopt the D2D communication in current Long Term Evolution Advanced (LTE-A) system. The main target use cases of the D2D in LTE system comprise public safety using direct communication and commercial services using proximal device discovery. Introduction of the D2D discovery inside LTE-A network bring some impacts to existing cellular operation by the in-bane emission property. This paper provides a promising way to support D2D discovery in LTE-A system and analyze the in-band emission impact of D2D discovery on current LTE-A operation. In order to minimize the impact, an eNB based open loop power control algorithm is proposed for D2D discovery. To see the performance of the proposed scheme, system-level simulation results are provided. Our results show that eNB based open loop power control algorithm alleviate the in-band emission impact significantly.