Centralized Interference-Aware Resource Allocation for Device-to-Device Broadcast Communications

The Long Term Evolution-Advanced (LTE-A) networks are being developed to provide mobile broadband services for the fourth generation (4G) cellular wireless systems. Device to-Device (D2D) communications is a promising technique to provide wireless peer-to-peer communication services and enhance resource utilization, as well as spectrum efficiency. In this paper, a centralized resource allocation scheme involving several Device-to-Device (D2D) broadcast groups underlaying cellular network is proposed. The great amount of interference caused by sharing the resources between different D2D broadcast users may significantly affect the performances of other D2D users. Therefore, an efficient resource allocation method is necessary to coordinate the interference. Specifically, we formulate the interference relationships among different D2D broadcast groups as an innovative interference-aware graph. We propose a centralized interference-aware graph based resource allocation algorithm that can effectively minimize the interfered D2D users between different D2D broadcast groups. This scheme aims to optimize the number of "conflict UEs" meanwhile mitigate different D2D broadcast groups from affecting the performances of each other.