Method for determining link availability for IAB node, and node using same method

1. A method for receiving information for a guard symbol in a wireless communication system, the method performed by a node and comprising:

receiving the information for the guard symbol; and

applying the information for the guard symbol,

wherein the information for the guard symbol informs a number of guard symbols for each combination of a mobile terminal (MT) operation and a distributed unit (DU) operation, and

wherein the guard symbol is a symbol not used based on a transition between the MT operation and the DU operation.

2. The method of claim 1 , wherein the information for the guard symbols informs a number of guard symbols for the transition from the MT operation to the DU operation and a number of guard symbols for the transition from the DU operation to the MT operation, respectively.

3. The method of claim 2 , wherein the MT operation is at least one of MT transmission (TX) and MT reception (RX), and

wherein the DU operation is at least one of DU TX and DU RX.

4. The method of claim 3 , wherein the information for the guard symbol informs at least one of:

the number of guard symbols for the transition from the MT RX to the DU TX,

the number of guard symbols for the transition from the MT RX to the DU RX,

the number of guard symbols for the transition from the MT TX to the DU TX,

the number of guard symbols for the transition from the MT TX to the DU RX,

the number of guard symbols for the transition from the DU TX to the MT RX,

the number of guard symbols for the transition from the DU TX to the MT TX,

the number of guard symbols for the transition from the DU RX to the MT RX, or

the number of guard symbols for the transition from the DU RX to the MT TX.

5. The method of claim 1 , wherein the node receives the information for the guard symbol from a parent node.

6. The method of claim 1 , wherein the node transmits information for a desired guard symbol to a parent node.

7. The method of claim 6 , wherein the information for the desired guard symbol informs a number of guard symbols for each combination of the MT operation and the DU operation desired by the node.

8. The method of claim 1 , wherein the node is a node supporting the MT operation and the DU operation.

9. The method of claim 1 , wherein the MT operation is an operation related to a communication between the node and a parent node, and

wherein the DU operation is an operation related to a communication between the node and a children node.

10. The method of claim 1 , wherein the node is an integrated access and backhaul (IAB) node.

11. A node comprising:

a transceiver;

at least one memory; and

at least one processor being operatively connected to the at least one memory and the transceiver,

wherein the at least one processor is configured to:

control the transceiver to receive information for a guard symbol; and

apply the information for the guard symbol,

wherein the information for the guard symbol informs a number of guard symbols for each combination of a mobile terminal (MT) operation and a distributed unit (DU) operation, and

wherein the guard symbol is a symbol not used based on a transition between the MT operation and the DU operation.

12. A method for transmitting information for a guard symbol in a wireless communication system, the method performed by a node and comprising:

transmitting the information for the guard symbol,

wherein the information for the guard symbol informs a number of guard symbols for each combination of a mobile terminal (MT) operation and a distributed unit (DU) operation, and

wherein the guard symbol is a symbol not used based on a transition between the MT operation and the DU operation.