Method for d2d terminal transmitting and receiving data in wireless communication system supporting device-to-device communication

A method of setting a link identifier by a D2D user equipment in a wireless communication system supportive of a D2D (device-to-device) communication, the method comprising:

• searching neighbor D2D user equipments through a discovery slot;
• establishing a D2D user equipment link by selecting a specific D2D user equipment from the neighbor D2D user equipments;
• requesting a base station to assign a link identifier to use between the linked D2D user equipments;
• and
• receiving the assigned link identifier from the base station and setting the received link identifier as the link identifier for the two D2D user equipments,
• wherein the set link identifier is selected from unused link identifiers neighboring to the two D2D user equipments.

A D2D (device-to-device) user equipment of setting a link identifier in a wireless communication system supportive of a D2D communication, the D2D user equipment comprising:

• a processor configured to:
• search neighbor D2D user equipments through a discovery slot, the processor configured to establish a D2D user equipment link by selecting a specific D2D user equipment from the neighbor D2D user equipments,
• set the link identifier between the D2D user equipment and the linked D2D user equipment,
• wherein the link identifier is set using identifiers of the linked two D2D user equipments or set to a predefined link identifier in accordance with a location of a signal of the linked two D2D user equipments within the discovery slot.

A D2D (device-to-device) user equipment of setting a link identifier in a wireless communication system supportive of a D2D communication, the D2D user equipment comprising;

• a transmitter;
• a receiver;
• and
• a processor configured to:
• search neighbor D2D user equipments through a discovery slot,
• establish a D2D user equipment link by selecting a specific D2D user equipment from the neighbor D2D user equipments,
• wherein the processor is further configured to control the transmitter to request a base station to assign a link identifier to use between the linked D2D user equipments, the processor is further configured to control the receiver to receive the assigned link identifier from the base station, the processor is further configured to set the received link identifier as the link identifier for the two D2D user equipments,
• wherein the set link identifier is selected from unused link identifiers neighboring to the two D2D user equipments.