Socially-aware content delivery for device-to-device communications underlay cellular networks

The emerging Device-to-Device (D2D) communications paradigm has received increasing attentions from both research and industry communities. Most of the previous works on D2D communications, however, mainly concentrated on interference management and throughput optimization. Some recent works have observed that by properly caching the data at the device level, the Quality of Experience (QoE) can be enhanced. In this paper, we propose a novel socially-aware data content delivery scheme for D2D underlay wireless networks by taking social ties and common interests among users into consideration. In particular, we jointly consider the features of the D2D transmissions in the physical layer, social characteristics, and interest similarity impact to formulate the D2D content delivery problem. Accordingly, an accurate and efficient three-dimensional matching-based scheme is presented to address the formulated problem. The performance evaluations are conducted to show the potential gain of the proposed approach.