Lg Electronics Inc.

Seokjung Kim

Jian Xu

Daewook Byun

Jaewook Lee

Hongsuk Kim

Sangwon Kim

Myungjune Youn

Sunghoon Jung

Laeyoung Kim

Hyunjung Choe

Sunyoung Lee

Heejeong Cho

Taehun Kim

Jinsook Ryu

Jongwoo Hong

Bokyung Byun

A method and apparatus for sidelink resource handling for central unit (CU)-distributed unit (DU) split based vehicle-to-everything (V2X) communication is provided. A gNB central unit (gNB-CU) in a wireless communication system receives, from a wireless device, information related to a radio access technology (RAT) for which a sidelink resource is requested. The gNB-CU transmits, to a gNB distributed unit (gNB-DU), the information related to the RAT for sidelink resource allocation.

Sidelink resource handling for CU-DU split based V2X communication

The present disclosure relates to resource allocation in wireless communications. According to various embodiments, a method performed by a central unit (CU) in a wireless communication system comprises: receiving, from one or more distributed units (DUs), resource information on radio resources for a multicast-broadcast service (MBS) service allocated by the one or more DUs; determining to perform a multicast or broadcast transmission of the MBS service to wireless devices based on a location of the wireless devices and a number of the wireless devices; determining common resources for the multicast or broadcast transmission of the MBS service to be used by the one or more DUs based on the resource information received from the one or more of DUs; and transmitting, to the one or more DUs, information for the common resources for the multicast or broadcast transmission of the MBS service.

Method and apparatus for resource allocation in wireless communication system

One disclosure of the present specification provides a method by which a policy control function (PCF) performs communication. The method comprises the steps of: receiving a UE policy association establishment (UE association establishment) message from an access and mobility management function (AMF); and transmitting a UE route selection policy (URSP) rule to a user equipment (UE), wherein the URSP rule includes a first route selection descriptor (RSD) and a second RSD, the first RSD includes a protocol data unit (PDU) session pair identifier (ID), the PDU session pair ID is used to establish two redundant PDU sessions, and the second RSD does not include the PDU session pair ID.

PDU session management method

Provided is a method and device for an N14 interface support indicator for service continuity. A next generation radio access network (NG-RAN) node of a first network receives an initial UE context configuration request message from an access and mobility management function (AMF) of the first network. The initial UE context configuration request message includes (i) a registration acceptance message that is a response to a registration request message, and (ii) information on at least one second network supported by the first network, and the registration acceptance message includes information on whether an N14 interface between the AMF of the first network and an AMF of the at least one second network is supported. The NG-RAN node of the first network initiates handover to one network among the at least one second network, based on the information on the at least one second network.

N14 interface support indicator for service continuity

One disclosure of the present specification provides a method by which an AMF performs communication related to a network slice. The method may comprise the steps of: receiving a PDU session establishment request message including information about a second PDU session; determining to forward a UE to a second RAN node supporting a second network slice; transmitting a message including information indicating that the UE needs to be forwarded to the second RAN node supporting the second network slice; receiving a handover required message; and transmitting a request message for deactivating the first PDU session related to a first network slice.

Communication related to network slice

A method performed by a central unit (CU) in a first radio access network (RAN) node comprises: establishing a dual connectivity (DC) of the first RAN node and a second RAN node for a wireless device; providing a service to the wireless device in the DC based on a distributed unit (DU) of the first and second RAN nodes; receiving, from a CU of the second RAN node in the DC, handover information for a handover of the wireless device from the second RAN node to the first RAN node; performing a packet data convergence protocol (PDCP) anchor change from the CU of the second RAN node to the CU of the first RAN node based on the handover information; and transmitting, to the DU of the first RAN node, a message comprising information instructing not to release the DU of the first RAN node after the PDCP anchor change.

Method and apparatus for mobility management in wireless communication system

A method and apparatus for stopping multicast and broadcast service in a wireless communication system is provided. A CU-UP of a RAN node receives, from a CU-CP of the RAN node, a first message to initiate a MLD) and/or IGMP Leave procedure. A CU-UP of a RAN node performs the MLD and/or IGMP Leave procedure for the MB service indicated by the identity for the MB service along with an MB-UPF based on the Transmission Stop Indication. A CU-UP of a RAN node transmits, to the CU-CP of the RAN node, a second message informing that the MLD and/or IGMP Leave procedure is completed.

Method and apparatus for stopping multicast and broadcast service in a wireless communication system

A method and apparatus for supporting a DAPS handover procedure in a wireless communication system is provided. A target BS receives, from a source BS, a first message for a dual active protocol stack (DAPS) handover of a wireless device. A target BS transmits, to the source BS, a second message to inform that the DAPS handover is accepted. A target BS receives, from the wireless device, a third message including an information that the wireless device does not perform the DAPS handover. A target BS transmits, to the source BS, a fourth message including the information received from the wireless device.

Method and apparatus for supporting a daps handover procedure in a wireless communication system

The present disclosure relates to a reconfiguration in a wireless communication system. According to various embodiments, a method performed by a master node (MN) serving a wireless device with a source secondary node (SN) in a dual connectivity (DC) in a wireless communication system comprises: transmitting, to the wireless device, radio resource control (RRC) reconfiguration parameters; transmitting, to the source SN, a request message for a user equipment (UE) context stored in the source SN; receiving, from the source SN, a response message comprising the UE context; transmitting, to a target SN, a SN addition request message comprising the UE context; receiving, from the target SN, a SN addition request acknowledgement message comprising a delta configuration for the RRC reconfiguration parameters, wherein the delta configuration comprises a configuration that is changed with respect to the RRC reconfiguration parameters in the UE context; and transmitting, to the wireless device, a RRC reconfiguration message for SN mobility comprising the delta configuration.

Method and apparatus for reconfiguration in wireless communication system

A method and apparatus for switching of multicast and broadcast service between multicast and unicast in a wireless communication system is described. A CU-CP establishes a connection with a wireless device for a Multicast and/or Broadcast Service (MBS). A CU-CP receives, from the CU-UP, a first message including a retransmission information on data transmission related to the MBS. A CU-CP determines whether to perform a switch of the first transmission to a second transmission for the MBS based on the retransmission information.

Method and apparatus for switching of multicast and broadcast service between multicast and unicast in a wireless communication system

A method and apparatus for switching between unicast and multicast in a wireless communication system is provided. A DU of a RAN node provides the MBS by using a first transmission to the wireless device. A DU of a RAN node receives, from the wireless device, feedback information in response to the provided MBS. A DU of a RAN node transmits, to a central unit (CU) of the RAN node, a first switching message based on the received feedback information. A DU of a RAN node receives, from the CU, a second switching message to switch the first transmission to the second transmission for the MBS. A DU of a RAN node provides the MBS by using the second transmission to the wireless device.

Method and apparatus for switching between unicast and multicast in a wireless communication system

The present disclosure relates to multicast-broadcast service (MBS) area control in wireless communications. According to an embodiment of the present disclosure, a method performed by a distributed unit (DU) in a wireless communication system comprises: transmitting, to a central unit (CU), information informing multicast-broadcast service (MBS) areas supported by the DU; receiving, from the CU, configurations for one or more MBS areas comprising a configuration for a first MBS area and a configuration for a second MBS area; providing an MBS service to a plurality of wireless devices based on the configuration for the first MBS area; receiving, from the plurality of wireless devices, feedback information for the first MBS area; transmitting, to the CU, a status message comprising an identity (ID) of the first MBS area and information obtained from the feedback information for the first MBS area; receiving, from the CU, a message for requesting a change of an MBS area, wherein the message comprises information for the second MBS area; and providing an MBS service based on the configuration for the second MBS area.

Method and apparatus for multicast-broadcast service area control in wireless communication system

The present disclosure relates to inactivity handling in mobility in wireless communication system. According to various embodiments, a method performed by a master node (MN) serving a wireless device with a secondary node (SN) in a wireless communication system comprises: receiving, from the SN, criterion information for triggering a primary secondary cell (PSCell) mobility; transmitting, to the wireless device, a configuration for the PSCell mobility comprising the criterion information; receiving, from the wireless device, state indication information informing that the wireless device is in an inactive state after the PSCell mobility is completed based on the configuration; and transmitting, to the SN, the state indication information received from the wireless device.

Method and apparatus for inactivity handling in mobility in wireless communication system

A method and apparatus for determining to switch between unicast and multicast in a wireless communication system is provided. A CU of a RAN node provides, via the DU, the MBS by using a first transmission to the wireless device. A CU of a RAN node receives, from the DU, measurement report for the MBS generated by the wireless device. A CU of a RAN node determines whether to switch the first transmission to a second transmission for the MBS based on the measurement report. A CU of a RAN node provides, via the DU, the MBS by using the second transmission to the wireless device.

Method and apparatus for determining to switch between unicast and multicast in a wireless communication system

A method and apparatus for support of CU-DU split in MT-EDT procedure in a wireless communication system is provided. A Central Unit (CU) of a Radio Access Network (RAN node) receives, from a Distributed Unit (DU) of the RAN node, second information related to a transport block used for the wireless device. The CU decides a Radio Resource Control (RRC) state for transmitting the downlink (DL) data to the wireless device based on the first information related to the DL data and the second information related to the transport block.

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Seoul, South Korea

Seokjung Kim