Kt Corporation

Pegasus Wireless Innovation LLC

Sung-pyo Hong

Woo-jin Choi

Kyungjun Lee

Kyujin Park

Ki-tae Kim

Provided are methods and apparatuses for transmitting a buffer status report in carrier aggregation environment. The method may include receiving, from a base station, high layer signaling including information for configuring data duplicate transmission using carrier aggregation, configuring a plurality of radio link control (RLC) entities including a first RLC entity and a second RLC entity associated with one packet data convergence protocol (PDCP) entity based on the high layer signaling, and configuring a logical channel associated with the first RLC entity and a logical channel associated with the second RLC entity to one medium access control (MAC) entity; and when the data duplicate transmission is activated, transmitting, to the base station, the buffer status report including PDCP data volume in both a logical channel group associated with the first RLC entity and a logical channel group associated with the second RLC entity.

Buffer state report transmission method and device therefor

Provided are a method and device for switching between unicast transmission and multicast/broadcast service (MBS) transmission in a cellular wireless communication network. The method for a base station to switch MBS data transmission may include: transmitting configuration information for reception of MBS data of a user equipment (UE) to the UE; transmitting information instructing a change of radio bearer for the reception of the MBS data to the UE; and receiving a packet data convergence protocol (PDCP) status report from the UE.

Method and device for dynamically switching a transmission method for receiving MBS data based on split radio bearer structure

Provided are a method and device for processing multicast/broadcast service (MBS) data by a UE in an NR-based mobile communication network. The method may include receiving configuration information for receiving MBS data through semi-persistent scheduling (SPS), monitoring indication information associated with the SPS based on the configuration information, and receiving the MBS data according to the SPS based on the configuration information.

Method and device for receiving MBS data

Provided are a method and apparatus for controlling sidelink communication. The method for performing, by a terminal, sidelink communication, may include the steps of: for a sidelink HARQ operation, receiving, from a base station, sidelink discontinuous HARQ configuration information used for monitoring a physical downlink control channel (PDCCH); transmitting sidelink data; and monitoring, in a PDCCH discontinuous monitoring section, the PDCCH configured on the basis of discontinuous reception (DRX) parameters included in the sidelink discontinuous HARQ configuration information.

Method for controlling sidelink communication, and apparatus therefor

The present disclosure relates a method of transmitting a buffer status report by a terminal. The method may include i) receiving an RRC reconfiguration message including identification information, ii) identifying logic channels associated with the first base station and logic channels associated with the second base station, iii) triggering the buffer status report by identifying buffer statuses of the identified logic channels associated with the first base station and the second base station, and transmitting the buffer status reports to the first base station and the second base station.

Method for transmitting buffer status report of terminal in small cell environment and device therefor

An access control technology in a next generation mobile communication network is disclosed. More specifically, disclosed is a technology for controlling an access control operation of a terminal through an integrated category by various methods and layers. One embodiment provides a method by which a terminal performs integrated access control, comprising the steps of: receiving, from a base station, system information including information for access control; indicating access category information from an NAS layer to an AS layer of the terminal when an access attempt is triggered; confirming whether access barring parameter information is included in the system information; and controlling an access barring check operation in the AS layer by using at least one of the access category information and the access barring parameter information.

Access control method and device

Provided are a method and a device for performing a UE-based handover in a next generation wireless access network. The method of a UE may include receiving, from a source base station, an upper layer signaling including information on UE-based handover command and information on conditions for handover execution; storing a target cell configuration by using the information on conditions for handover execution; and determining whether to perform a handover procedure to a target cell, by determining whether predetermined conditions for handover are satisfied.

Method for performing terminal-based handover and device therefor

Provided are a method and device for controlling sidelink communication. The method may include receiving sidelink discontinuous reception configuration information, configuring the sidelink discontinuous reception configuration information in the terminal, and discontinuously monitoring a physical sidelink control channel (PSCCH) on the basis of discontinuous reception (DRX) parameters included in the sidelink discontinuous reception configuration information.

Method for controlling sidelink communication, and device therefor

Provided are apparatus and method for communication in a non-terrestrial network (NTN). The method may include: receiving, from a base station, HARQ process activation indication information indicating whether to activate an HARQ process operation; determining whether to perform the HARQ process operation for a downlink signal on the basis of information included in the downlink signal when the downlink signal is received from the base station if the HARQ process operation deactivation is configured by the HARQ process activation indication information; and transmitting, to the base station, feedback information for the downlink signal when performing the HARQ process operation for the downlink signal is determined.

Method for performing communication by using non-terrestrial network, and apparatus therefor

Disclosed is a terminal and a base station for communicating each other by using a non-terrestrial network (NTN). A method of a terminal may include the steps of receiving, from a base station, configuration information for cell changing or beam failure recovery, determining, by using the configuration information, whether a trigger condition for cell changing or beam failure recovery is satisfied, and performing a cell changing or beam failure recovery operation when the trigger condition is satisfied; and an apparatus.

Provided are apparatus and method for processing MBS data. The method for receiving multicast/broadcast service (MBS) by a user equipment (UE) may include, when handover is determined, receiving, through a source base station, radio bearer configuration information for receiving MBS session data through a target base station, configuring a radio bearer for receiving the MBS session data through the target base station based on the radio bearer configuration information, and receiving the MBS session data through the radio bearer. The radio bearer configuration information is information generated by the target base station and transmitted to the source base station.

Methods for processing multicast/broadcast service data and apparatuses thereof

Provided are a method of a base station for controlling transmission and reception of data through a network slice. The method includes: receiving network slice request information from a terminal in which a network slice is configured; controlling so as to deliver the network slice request information to a core network entity; and receiving, from the core network entity, specific network slice information configured on the basis of the network slice request information.

Method for processing data on basis of network slice, and apparatus therefor

Provided is a method of a terminal for performing communication by using a non-terrestrial network (NTN). The method may include receiving, from a base station, HARQ operation activation indication information for indicating whether to activate an HARQ operation; configuring a HARQ process based on the HARQ operation enabling indication information; and identifying and controlling HARQ operations for a downlink signal according to whether the HARQ process configured whether to enable or disable the HARQ operation.

Method for performing communication by using non-terrestrial network, and device therefor

Provided are a method and an apparatus for configuring a sidelink radio bearer on a sidelink interface used for vehicle communication and processing radio link failure. The method may include receiving sidelink radio bearer configuration information for configuring a sidelink radio bearer on a sidelink interface used for the vehicle communication from a base station; configuring the sidelink radio bearer based on the sidelink radio bearer configuration information, and transmitting the sidelink radio bearer configuration information to another UE subject to the vehicle communication; detecting a sidelink radio link failure when an acknowledged mode (AM) radio link control (RLC) entity linked to the sidelink radio bearer reaches a maximum number of retransmissions; and indicating the detection of the sidelink radio link failure to a higher layer regardless of a radio resource control (RRC) state of the UE when the sidelink radio link failure is detected.

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Seoul, South Korea

Sung-pyo Hong