Method for device-to-device group communications and the apparatus using the method

PURPOSE: A D2D(Device to Device) group communication method and a device thereof are provided to easily implement D2D group communication by adding additional elements to a wireless resource structure. CONSTITUTION: A terminal device receives first wireless resource information from a base station and transmits a scheduling request to a base station and receives first wireless resource information from the base station(S1010,S1020). The terminal device transmits a D2D buffer state report to the base station through a first wireless resource and receives second wireless resource information including the D2D resource assignment information(S1030,S1040). The terminal device transmits control information for D2D group transmission and D2D user data to two or more opponent terminals within the D2D group(S1050). [Reference numerals] (AA) Start; (BB) End; (S1010) Transmit a scheduling request for D2D group transmission to a base station; (S1020) Receive first wireless resource information for a state report of D2D data to be transmitted from the base station; (S1030) Transmit a D2D buffer state report to the base station using a first wireless resource; (S1040) Receive second wireless resource information including D2D resource allocation information required to the D2D group information from the base station; (S1050) Transmit control information for D2D group communication and D2D user data including a D2D group as a terminal identifier and the D2D resource allocation information required to the D2D group transmission to two or more opponent terminals within the D2D group