Kt Corporation

Lg Electronics Inc.

Ha Sung Kim

Sung-Yeop Pyun

Hyun Ho Jee

Hyung-joon Song

Jai-Sop Hyun

Provided are a method and an apparatus for interworking between 5G and LTE/LTE-advanced radio access networks (RANs). The method may include receiving, by a master base station, a service quality policy from a core network connected to the master base station and a secondary base station, receiving one or more packet flows from the core network; and mapping the packet flows to at least one of radio flows and radio bearers based on the service quality policy.

Method for interworking between heterogeneous radio access networks and apparatus therefor

Provided are a method and an apparatus for processing handover between 5G base stations, which support beamforming and interwork with a 5G core network system in a next-generation/radio access network. The method of processing handover in a base station includes: receiving radio quality measurement information on a plurality of cells and on beams of the respective cells from a user equipment; determining whether handover is required based on the radio quality measurement information and transmitting a handover required message to a core network entity when it is determined that handover is required; and receiving a handover command message from the core network entity.

Method for processing handover between base stations supporting beamforming and apparatus thereof

Provided are a method and an apparatus for controlling NR data volume based on an interface between an NR base station and an LTE base station and an interface between an EPC and the LTE base station in a 5G non-standalone (NSA) network structure using an LTE EPC as a core network. The method includes receiving information about the volume of data that the secondary base station transmits to and receives from a terminal using a radio resource of the secondary base station from the secondary base station, and transmitting a secondary RAT data usage report message including the information about the volume of data the secondary base station transmits to and receives from the terminal using the radio resource of the secondary base station from the secondary base station to a mobility management entity (MME) using an S1-C interface.

Method and apparatus for controlling data volume of secondary GNB

Provided are a method and a device for configuring a central unit and a distributed unit for a 5th generation (5G) wireless access network base station configuration. In particular, the method of a central unit (CU) for communicating with a terminal may include receiving network function configuration information of a distributed unit (DU) connected to the CU by using a fronthaul interface, configuring a network function of the CU on the basis of the network function configuration information of the DU, and transmitting data to a terminal through the DU.

Method for configuring central unit by using fronthaul interface, and device for same

Provided are a method and an apparatus for performing a mobility control procedure of a terminal, by a master base station. The method includes: determining starting of a secondary node addition procedure for setting a terminal context for a secondary node in order to provide the terminal with a radio resource of the secondary node; transmitting, to the secondary node, a secondary base station addition request message for requesting radio resource allocation for a specific E-UTRAN radio access bearer (E-RAB); and receiving, from the secondary node, secondary cell group radio resource configuration information to be additionally configured in the terminal.

Method for controlling mobility of terminal in heterogeneous network and apparatus therefor

Provided are technologies for data transmission and reception using an interworking interface between heterogeneous radio access network base stations, such as between NR and LTE, for a 5G non-standalone (NSA) network. A base station for controlling downlink data transmission may include a controller configured to setting up an X2 interface for transmitting the downlink data to a UE by interworking with another base station, a transmitter configured to transmit downlink use data information including information indicating whether to perform retransmission of an associated downlink data packet to another base station through the X2 interface, and a receiver configured to receive downlink data transfer status information from another base station through the X2 interface.

Method and apparatus for controlling data transmission using interworking interface between NR and LTE base station

Provided is a method for managing a packet data unit (PDU) session between a base station and a core network in a next generation/5G radio access network (hereinafter, also referred to as NR (New Radio)). The method may include determining whether a requirement of a quality of service (QoS) flow for a terminal is satisfied, transmitting, to a core network entity, a PDU session resource notification message indicating that the requirement is not satisfied when the requirement is not satisfied, receiving one of a PDU session resource modification message and a PDU session resource release message from the core network entity, and transmitting a processing result on one of the PDU session resource modification message and the PDU session resource release message to the core network entity.

Method and apparatus for managing PDU session between base station and core network in next-generation wireless network

Provided are a method and a base station for controlling mobility of UE. The method may include receiving, by a CU, a measurement report from a UE through a DU; sending, by the CU, a UE context setup request message to a target DU to create a UE context and set a bearer up; sending, by the target DU, a UE context setup response message to the CU to inform the CU of completion of creating the UE context and setting up a bearer; sending, by the CU, a UE context modification request message including a RRC connection reconfiguration message to the source DU; performing, by the target DU, a random access procedure with the UE; and forwarding, by the target DU, an RRC connection reconfiguration complete message received from the UE to the CU.

Method of controlling mobility of UE and apparatus therefor

Provided are apparatus and methods for controlling a handover of a user equipment between base stations each belonging to a network different from the other. The method includes: i) determining whether the user equipment should be handed over to a target base station belonging to a heterogeneous network based on measurement information received from the user equipment, ii) transmitting a handover required message containing identification information of the target base station to a core network entity linked to the source base station, when it is determined that the user equipment should be handed over, iii) receiving a handover command message containing evolved packet system (EPS) bearer setup list information of the target base station from the core network entity, and iv) transmitting the handover command message to the user equipment.

Method for controlling heterogeneous network handover and apparatus therefor

Provided are a method of a central unit (CU) included in a gNB for managing radio resources and an apparatus thereof. The method may include generating a UE context setup message to be transmitted to one or more distributed units (DUs) associated with the central unit, transmitting the UE context setup message to the one or more DUs through a fronthaul interface, and receiving a response message for the UE context setup message from the one or more DUs through the fronthaul interface.

Methods for managing resource based on open interface and apparatuses thereof

Provided is a method for transmitting and receiving message through a message transfer technology that uses a fronthaul interface between a central unit (CU) and a distributed unit (DU) configuring a 5G base station. The method includes generating a downlink message to be transmitted to one or more DUs associated with the CU, transmitting the downlink message to the one or more DUs through a fronthaul interface, and receiving an uplink message from the one or more DUs through the fronthaul interface.

Method and apparatus for transmitting and receiving message based on fronthaul interface

A mobile terminal is provided that includes a first display module to receive a touch signal and a second display module configured to be extensible. An image and a pointer may be displayed on the second display module if the second display is ejected from the mobile terminal. The pointer may move according to a drag direction and a drag distance corresponding to the touch signal if a touch signal with directivity is detected from the first display module. A character-input operation and/or a search operation may be performed on the image displayed on the second display module using the first display module.

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Seoul, South Korea

Ha Sung Kim