User Centric Content Sharing Based on D2D Cellular Networks

Abstract

To meet the rapid growth of massive user access requirement and service experience rate, user-centric ultra-dense networks are proposed to serve each user seamlessly based on dynamic access point groups, which breaks through the traditional network-centric cellular architecture. However, a large number of access points deployment and the long transmission distance between users and access points make the network cost and delay increase. Therefore, in this paper, a user-centric content sharing mechanism for device-to-device (D2D) cellular networks is proposed by multi-device-to-device (MD2D) user cooperation, which can not only shorten the content transmission distance, but also guarantee the quality of service at the lowest cost. In particular, in order to ensure quality of service at the lowest cost, a noncooperative game-based D2D cooperative user allocation scheme is proposed. However, the allocation scheme does not take into account the conflicts of interest between users because the allocated D2D cooperative users may meet the service requirement of multiple users at the same time. Accordingly, a Vickrey–Clarke–Groves based user trustworthy auction mechanism is proposed to avoid interest conflicts caused by the above-mentioned reasons. The results show that the proposed mechanism not only reduces the consumption and delay of content transmission, but also greatly help the base stations reduce base station load.