移動通信システム、ユーザ端末、基地局、プロセッサ及び通信制御方法

摘要

A mobile communication system includes a user terminal that performs D2D communication under management of a base station, the D2D communication indicating direct device to device communication. The user terminal transmits a D2D buffer status report indicating an amount of non-transmitted data in the D2D communication to the base station.