Method for setting synchronization between device-to-device communication terminals based on cellular communication system

摘要

A method for setting synchronization between terminals performing device-to-device (D2D) communication based on a cellular communication system is disclosed. The method for setting synchronization between terminals includes receiving a message instructing synchronization setting with an opposite terminal from a base station, selecting a first preamble transmitted for a synchronization setting with the opposite terminal based on the message instructing synchronization setting, transmitting the selected first preamble to the opposite terminal, receiving a second preamble from the opposite terminal, and setting the synchronization with the opposite terminal using a reception timing of the second preamble when the second preamble is a preamble designated in the message instructing synchronization setting. Thus, when the present invention is used, synchronization between two terminals performing direct communication may be set using a physical layer random access channel resource which has been used in an existing mobile communication system.

主权项

1. A method for setting synchronization between terminals performing device-to-device (D2D) communication, the method comprising:
receiving, at a first terminal, a message instructing synchronization setting with an opposite terminal from a base station; selecting, by the first terminal, a first preamble transmitted for synchronization setting with the opposite terminal based on the message instructing synchronization setting, and transmitting, by the first terminal, the selected first preamble to the opposite terminal; receiving, at the first terminal, a second preamble from the opposite terminal; and setting, by the first terminal, a synchronization with the opposite terminal using a reception timing of the second preamble when the second preamble is a preamble designated in the message instructing synchronization setting, wherein, in the setting of the synchronization by the first terminal with the opposite terminal, when the first preamble is the same as the second preamble, the synchronization with the opposite terminal is set using a reception timing of the second preamble.