Method and apparatus for transmitting and receiving a signal in a wireless communication system supporting a relay UE

1. A method for transmitting a signal in a wireless communication system supporting a Relay UE, the method performed by the Relay UE comprising:

determining whether or not to serve a connection request for a Remote UE using at least one of first control information related to a current state of the Relay UE, second control information indicating a type of traffic to be supported, and third information indicating a current load state of the Relay UE; and

transmitting the determination result to at least one Remote UE,

wherein the first control information includes at least one of information for a channel state with the Remote UE, information for power available in the Relay UE, or information for a link state with a base station,

wherein the third control information includes at least one of information for the number of currently connected Remote UEs or information for the number of Remote UEs attempting to connect for a specific time,

wherein the determination result is a score value,

wherein the score value is calculated by applying a priority and a weight to each information included in the first control information, the second control information, and the third control information, or

wherein the score value is calculated by applying a priority and a weight to each of the first control information, the second control information, and the third control information.

2. The method of claim 1 , wherein the determination result indicates that the Relay UE can serve or cannot serve the connection request of the Remote UE.

3. The method of claim 1 , wherein the higher the calculated score, the higher the priority.

4. The method of claim 1 , wherein the result of determination includes a priority level represented by a bit string.

5. The method of claim 4 , wherein a first bit of the bit string has the highest priority level and the priority level is lower from the next bit.

6. The method of claim 4 , wherein the priority level is broadcast to the at least one Remote UE.

7. The method according to claim 1 , further comprising:

receiving, from the at least one Remote UE, fourth control information including at least one of information for an amount of data to be transmitted or information for remaining battery power.

8. The method of claim 7 , wherein the determining whether or not to serve the connection request for the Remote UE uses at least one of the first control information, the second control information, the third control information, or the fourth control information.

9. A method for transmitting a signal in a wireless communication system supporting a Relay UE, the method performed by a Remote UE, the method comprising:

receiving specific information related to a connection request from at least one Relay UE; and

determining a specific Relay UE to transceive the signal based on the received specific information,

wherein the specific information includes at least one of first control information related to a current state of the Relay UE, second control information indicating a type of traffic supported by the Relay UE, or third information indicating a current load state of the Relay UE,

wherein the first control information includes at least one of information for a channel state with the Remote UE measured by the Relay UE, information for power available in the Relay UE, or information for a link state between the Relay UE and a base station,

wherein the third control information includes at least one of information for the number of Remote UEs currently connected to the Relay UE or information for the number of Remote UEs attempting to connect to the Relay UE for a specific time,

wherein the specific information is a score value,

wherein the score value is calculated by applying a priority and a weight to each information included in the first control information, the second control information, and the third control information, or

wherein the score value is calculated by applying a priority and a weight to each of the first control information, the second control information, and the third control information.

10. The method of claim 9 , wherein the specific information is information indicating that the Relay UE can serve or can not serve the connection request of the Remote UE.

11. The method of claim 9 , wherein the specific information includes a priority level represented by a bit string.

12. The method of claim 9 , further comprising:

transmitting, to the at least one Relay UE, fourth control information including at least one of information for an amount of data to be transmitted or information for remaining battery power.

13. The method of claim 12 , wherein the specific information is determined using at least one of the first control information, the second control information, the third control information, or the fourth control information.

14. A Relay user equipment (UE) for transmitting a signal in a wireless communication system, the Relay UE comprising:

a radio frequency (RF) module configured to communicate with the outside in a wireless or a wired manner; and

a processor functionally connected to the RF module, wherein the processor is configured:

to determine whether or not to serve a connection request for a Remote UE using at least one of first control information related to a current state of the Relay UE, second control information indicating a type of traffic to be supported, and third information indicating a current load state of the Relay UE; and

to transmit the determination result to at least one Remote UE,

wherein the first control information includes at least one of information for a channel state with the Remote UE, information for power available in the Relay UE, or information for a link state with a base station,

wherein the third control information includes at least one of information for the number of currently connected Remote UEs or information for the number of Remote UEs attempting to connect for a specific time,

wherein the determination result is a score value,

wherein the score value is calculated by applying a priority and a weight to each information included in the first control information, the second control information, and the third control information, or

wherein the score value is calculated by applying a priority and a weight to each of the first control information, the second control information, and the third control information.