Method and apparatus for backhaul status reporting in wireless communication system

An integrated access and backhaul (IAB)-node adapted to operate in a wireless communication system comprising:

• a transceiver;
• a memory;
• and
• at least one processor operatively coupled to the transceiver and the memory, and configured to:
• wherein the IAB-node is a radio access network (RAN) node that supports access links to user equipment (UE) and backhaul links to parent nodes and child nodes,
• wherein the IAB-node includes an IAB-distributed unit (DU) and an IAB-mobile terminal (MT),
• wherein the IAB-MT is connected to a parent node from among the parent nodes via a first backhaul in an upstream direction,
• wherein the IAB-DU is connected to a child node from among the child nodes via a second backhaul in a downstream direction,
• control the transceiver to receive a detecting configuration and a report configuration via the first backhaul,
• wherein the report configuration comprises a reporting destination informing the IAB-node of at least one parent node from among the parent nodes,
• detect a status of the second backhaul based on the detecting configuration, and
• control the transceiver to transmit the status of the second backhaul based on the report configuration to the reporting destination via the first backhaul,
• wherein the reporting destination is at least one of an IAB-donor, the parent node or all of the parent nodes.

A non-transitory computer-readable medium having recorded thereon a program for performing each step of a method on a computer to control an integrated access and backhaul (IAB)-node, the method comprising:

• wherein the IAB-node is a radio access network (RAN) node that supports access links to user equipment (UE) and backhaul links to parent nodes and child nodes,
• wherein the IAB-node includes an IAB-distributed unit (DU) and an IAB-mobile terminal (MT),
• wherein the IAB-MT is connected to a parent node from among the parent nodes via a first backhaul in an upstream direction,
• wherein the IAB-DU is connected to a child node from among the child nodes via a second backhaul in a downstream direction,
• receiving a detecting configuration and a report configuration via the first backhaul,
• wherein the report configuration comprises a reporting destination informing the IAB-node of at least one parent node from among the parent nodes;
• detecting a status of the second backhaul based on the detecting configuration;
• and
• transmitting the status of the second backhaul based on the report configuration to the reporting destination via the first backhaul,
• wherein the reporting destination is at least one of an IAB-donor, the parent node or all of the parent nodes.