Patent ID: 11910230
Assignee: KT CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of an integrated access and backhaul (IAB) node for processing data, the method comprising:
configuring a mobile-termination (MT) function and a distribute unit (DU) function of the IAB node;
monitoring an uplink buffer status or a downlink buffer status in the IAB node; and
transmitting downlink buffer status information or uplink buffer status information to a donor base station or an associated parent IAB node based on a result of the monitoring for the uplink buffer status or the downlink buffer status,
wherein the uplink buffer status information or the downlink buffer status information is transmitted to the associated parent IAB node by being included in a backhaul adaptation protocol (BAP) control protocol data unit (PDU),
wherein the downlink buffer status information includes buffer size information per backhaul radio link control (RLC) channel identifier information,
wherein the uplink buffer status information transmitted to the associated parent IAB node includes expected buffer size information distinguished from a buffer size of the IAB node, and the expected buffer size information is information on an amount of data expected to arrive at the IAB node in a predetermined amount of time, from a child IAB node associated with the IAB node, and
wherein the uplink buffer status information including the expected buffer size information is transmitted through a medium access control (MAC) control element (MAC CE) having logical channel identification information different from the uplink buffer status information not including expected buffer size information,
wherein when the IAB node received uplink user data, the IAB node selects the backhaul RLC channel for transmitting the uplink user data based on donor base station address information, and
wherein the transmission of the uplink buffer status information transmitted to the associated parent IAB node is triggered even when a buffer status report from a child IAB node associated with the IAB node is received,
wherein the logical channel identification information for the uplink buffer status information including the expected buffer size information is set to a value different from 59 to 62 used in the uplink buffer status information that does not include the expected buffer size information.