Method and apparatus for employing resource for device-to-device (D2D) wireless communication

A method of device-to-device (D2D) communication by a receiving user equipment (Rx UE), the method comprising:

• receiving a channel sensing signal containing first information on a priority of a transmitting user equipment (Tx UE);
• identifying whether a priority of the Rx UE is higher than the priority of the Tx UE;
• sending, in case that the priority of the Rx UE is higher than the priority of the Tx UE, a resource transfer request message containing second information on the priority of the Rx UE;
• and
• performing channel sensing for a preset or randomly selected duration,
• wherein the channel sensing signal includes a first sequence in a first symbol and a second sequence in a second symbol, the first symbol and the second symbol are in a same slot of time domain, and
• wherein the first sequence indicates a priority determined based on a service type of the data and the second sequence indicates a priority determined based on information on a user of the Tx UE.

A transmitting user equipment (Tx UE) supporting device-to-device (D2D) communication, comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to control to:
• send a channel sensing signal containing first information on a priority of the Tx UE and data,
• receive a resource transfer request message containing second information on a priority a receiving user equipment (Rx UE),
• identify whether the priority of the Tx UE is lower than the priority of the Rx UE, and
• terminate a transmission of the data in case that the priority of the Tx UE is lower than the priority of the Rx UE,
• wherein the channel sensing signal includes a first sequence in a first symbol and a second sequence in a second symbol, the first symbol and the second symbol are in a same slot of time domain, and
• wherein the first sequence indicates a priority determined based on a service type of the data and the second sequence indicates a priority determined based on information on a user of the Tx UE.

A receiving user equipment (Rx UE) supporting device-to-device (D2D) communication, comprising:

• a transceiver;
• and
• a controller coupled with the transceiver and configured to control to:
• receive a channel sensing signal containing first information on a priority of a transmitting user equipment (Tx UE),
• identify whether a priority of the Rx UE is higher than the priority of the Tx UE, and
• send, in case that the priority of the Rx UE is higher than the priority of the Tx UE, a resource transfer request message containing second information on the priority of the Rx UE, and
• perform channel sensing for a preset or randomly selected duration,
• wherein the channel sensing signal includes a first sequence in a first symbol and a second sequence in a second symbol, the first symbol and the second symbol are in a same slot of time domain, and
• wherein the first sequence indicates a priority determined based on a service type of the data and the second sequence indicates a priority determined based on information on a user of the Tx UE.