Patent ID: 9713183
Date: 2017-07-18
CPC Classifications: H04W

Claim:
1. A method for serving device-to-device (D2D) communication by a device in a wireless communication system, the method comprising: receiving, from a base station (BS) to be synchronized, system information comprising information related to the D2D communication; transmitting, to the BS, radio resource control (RRC) connection request message based on the system information; receiving, from the BS, an RRC connection response message including information on a signaling radio bearer, in response to the RRC connection request message; transmitting, to the BS, an RRC connection complete message comprising D2D communication support information, in response to the RRC connection response message; when the D2D communication is required, transmitting to a mobility management entity (MME) an attach request message comprising information indicating whether the device supports the D2D communication; and receiving, from the MME, an attach accept message comprising an accept notification of the D2D communication and an encryption key for the D2D communication.