Social-aware device-to-device communications underlaying cellular networks

摘要

This article put forward a resource allocation scheme aimming at maximizing system throughtput for devide-todevice( D2D) communications underlying cellular network. Firstly,user closeness is defined and calculated through social information including friendship,interest similarity and communication strength to represent the willingness of user to share the spectrum resource with others. Then a social-aware resource allocation problem is formulated to maximize the system throughput while guaranteeing the quality of service( QoS) requirements of both D2D pairs and cellular users( CUs). Then the complicate problem is decomposed into three subproblems. Firstly the admissible D2D pairs are determined and then the power of both CUs and D2D pairs is efficiently allocated.Finally CUs and D2D pairs are matched to reuse the spectrum resource in consideration of both user closeness and physical conditions. Simulation results certify the effectiveness of the proposed scheme which significantly enhances the system throughput compared with the existing algorithms.