Method and device for controlling transmission power in wireless communication system

A method performed by a parent node in a wireless system, the method comprising:

• receiving, from an IAB node, information on a desired backhaul downlink Tx power adjustment;
• receiving, from the IAB node, information on a specific time resource configuration, to which the information on a desired backhaul downlink Tx power adjustment applies;
• and
• based on the information on a desired backhaul downlink Tx power adjustment, transmitting, to the IAB node, a backhaul downlink signal.

An integrated access and backhaul (IAB) node in a wireless system, comprising:

• memory storing one or more instructions;
• and
• at least one processor;
• wherein the one or more instructions include computer-executable instructions that, when executed by the at least one processor individually or collectively, cause the IAB node to:
• transmit, to a parent node, information on a desired backhaul downlink Tx power adjustment,
• transmit, to the parent node, information on a specific time resource configuration, to which the information on a desired backhaul downlink Tx power adjustment applies, and
• based on the information on a desired backhaul downlink Tx power adjustment, receive, from the parent node, a backhaul downlink signal.

A parent node in a wireless system, comprising:

• memory storing one or more instructions;
• and
• at least one processor;
• wherein the one or more instructions include computer-executable instructions that, when executed by the at least one processor individually or collectively, cause the parent node to:
• receive, from an IAB node, information on a desired backhaul downlink Tx power adjustment,
• receive, from the IAB node, information on a specific time resource configuration, to which the information on a desired backhaul downlink Tx power adjustment applies, and
• based on the information on a desired backhaul downlink Tx power adjustment, transmit, to the IAB node, a backhaul downlink signal.