Base Station Assisted Device-to-Device Communications for Content Update Network

Inspired by D2D communication which is regarded as one of the potential technology in the next generation of wireless communication, we propose a novel framework in which cluster head might update cache file and the user acquire a file under the eNB guidance. The content cluster update deployment method is based on device-to-device (D2D) system, where the devices have cached video files from a media cloud. Moreover, each device downloads file from some other devices nearby through a direct link or multi-hop without going through eNB. In particular, we describe the physical layer as a simple "protocol-model", without interference. The highlights of this work lie in defining the cluster selecting, update file methods and shortest multi-hop problem and analyzing this method according simulation result.