Method for IAB operation having multiple RX timings, and node using same
The present specification provides a method for performing an integrated access and backhaul (IAB) operation by an IAB node in a wireless communication system, and an apparatus therefor, the method comprising: performing an initial access operation with another node; receiving uplink reception timing information of a child IAB node of the IAB node from the other node; and performing the IAB operation on the basis of the uplink reception timing information, wherein the uplink reception timing information is information related to whether a distributed unit (DU) operation of the child IAB node and a mobile terminal (MT) operation of the child IAB node can be simultaneously performed with respect to at least one time resource.
1 . A method for an integrated access and backhaul (IAB) node, the method comprising:
performing an initial access procedure with a parent node;
transmitting a group index of a child IAB node of the IAB node to the parent node, wherein the child IAB node is included in a group comprising child IAB nodes having a same uplink reception timing;
receiving, from the parent node, uplink reception timing information for the child IAB node, wherein the child IAB node includes a child IAB-mobile terminal (MT) and a child IAB-distributed unit (DU);
transmitting the uplink reception timing information to the child IAB node; and
communicating with the child IAB node based on the uplink reception timing information,
wherein the uplink reception timing information specifies time resources in which the child IAB node can perform simultaneous reception operations of the child IAB-MT and the child IAB-DU,
wherein a reception operation of the child IAB-MT is an operation in which the child IAB-MT receives a signal from the IAB node, and
wherein a reception operation of the child IAB-DU is an operation in which the child IAB-DU receives a signal from a user equipment (UE).
2 . The method of claim 1 , wherein the child IAB node is an IAB node that applies different uplink reception timing according to each time resource among a plurality of time resources.
3 . The method of claim 1 , wherein the uplink reception timing information is transmitted through F1-AP (Application Protocol) signaling.
4 . An Integrated Access and Backhaul (IAB) node comprising:
at least one transceiver;
at least one memory; and
at least one processor operatively coupled with the at least one memory and the at least one transceiver, wherein the at least one memory stores instructions that, based on being executed by the at least one processor, cause the at least one processor to perform operations comprising:
performing an initial access procedure with a parent node;
transmitting a group index of a child IAB node of the IAB node to the parent node, wherein the child IAB node is included in a group comprising child IAB nodes having a same uplink reception timing;
receiving, from the parent node, uplink reception timing information for the child IAB node, wherein the child IAB node includes a child IAB-mobile terminal (MT) and a child IAB-distributed unit (DU);
transmitting the uplink reception timing information to the child IAB node; and
communicating with the child IAB node based on the uplink reception timing information,
wherein the uplink reception timing information specifies time resources in which the child IAB node can perform simultaneous reception operations of the child IAB-MT and the child IAB-DU,
wherein a reception operation of the child IAB-MT is an operation in which the child IAB-MT receives a signal from the IAB node, and
wherein a reception operation of the child IAB-DU is an operation in which the child IAB-DU receives a signal from a user equipment (UE).
5 . An apparatus comprising:
at least one memory; and
at least one processor operatively coupled with the at least one memory,
wherein the at least one memory stores instructions that, based on being executed by the at least one processor, cause the at least one processor to perform operations comprising:
performing an initial access procedure with a parent node;
transmitting a group index of a child IAB node of the IAB node to the parent node, wherein the child IAB node is included in a group comprising child IAB nodes having a same uplink reception timing;
receiving, from the parent node, uplink reception timing information for the child IAB node, wherein the child IAB node includes a child IAB-mobile terminal (MT) and a child IAB-distributed unit (DU);
transmitting the uplink reception timing information to the child IAB node; and
communicating with the child IAB node based on the uplink reception timing information,
wherein the uplink reception timing information specifies time resources in which the child IAB node can perform simultaneous reception operations of the child IAB-MT and the child IAB-DU,
wherein a reception operation of the child IAB-MT is an operation in which the child IAB-MT receives a signal from the IAB node, and
wherein a reception operation of the child IAB-DU is an operation in which the child IAB-DU receives a signal from a user equipment (UE).