DIRECT DEVICE TO DEVICE COMMUNICATION METHOD USING ANALOG RANDOM ACCESS PROCEDURE, AND APPARATUS FOR SAME

摘要

A transmission terminal randomly selects, from a base station, one signature for device to device (D2D) communication from among a prescribed number of signatures for D2D communication, transmits a first message by means of resources that have been randomly selected from among predetermined time-frequency resources, receives, from the base station, a second message that comprises control information for a D2D broadcast or a groupcast signal transmission, uses the control information received via the second message to transmit a third message including the D2D broadcast or groupcast signal to one or more reception terminals, and receives a retransmission request signal for the third message from any one or more among the one or more reception terminals, the retransmission of the third message being carried out by means of a device other than the transmission terminal.

主权项

1. A method for performing device-to-device (D2D) communication by a transmission (Tx) user equipment (UE) in a wireless communication system, the method comprising:
transmitting a first message to a base station (BS) through a randomly selected resource among predetermined time-frequency resources by randomly selecting one of a predetermined number of signatures for D2D communication; receiving a second message including control information for transmission of a D2D broadcast or groupcast signal from the BS; transmitting a third message including the D2D broadcast or groupcast signal to one or more reception (Rx) UEs using the control information received through the second message; and receiving a retransmission request signal for the third message from at least one of the one or more Rx UEs, wherein retransmission of the third message is performed by devices other than the Tx UE.