Handover method in wireless communication system and apparatus therefor

    公开(公告)号:US11240719B2

    公开(公告)日:2022-02-01

    申请号:US16765463

    申请日:2018-11-16

    Abstract: According to one aspect of the present invention, a method for supporting a user equipment (UE) handover of a target (T)-access and mobility management function (AMF) in a wireless communication system may comprise the steps of: receiving a UE context creation request message from a source (S)-AMF, wherein the UE context creation request message includes packet data unit (PDU) session identifiers (ID) as a handover target and single (S)-network slice selection assistance information (NSSAI) corresponding to each PDU session ID; determining whether the corresponding S-NSSAI is valid in the T-AMF; and sending, to a session management function (SMF), a PDU session update session management (SM) context request message only for a PDU session ID that corresponds to the S-NSSAI determined to be valid according to the determination result, out of the PDU session IDs.

    Method for registering terminal in wireless communication system and apparatus therefor

    公开(公告)号:US11184838B2

    公开(公告)日:2021-11-23

    申请号:US16623757

    申请日:2018-06-18

    Abstract: A method for registering a terminal of an access and mobility management function (AMF) in a wireless communication system, according to one aspect of the present invention, comprises the steps of: receiving, from a terminal, a registration request message requesting registration of the terminal; and transmitting, to the terminal, a registration response message in response to the registration request message, wherein the registration request message may include: a session management (SM) message for requesting the establishment of a packet data unit (PDU) session for the terminal; and an indicator for indicating whether the establishment of the PDU session is essential.

    Method and user equipment for connecting by means of plurality of accesses in next generation network

    公开(公告)号:US10716159B2

    公开(公告)日:2020-07-14

    申请号:US16327724

    申请日:2017-07-31

    Abstract: A method for a user equipment (UE) connecting to a network includes: if second connection is to be executed by means of a second access, determining whether or not first connection has been previously executed by means of a first access; and, if the first connection by means of the first access has been executed and the second connection by means of the second access is determined to be an addition, transmitting a connection request message comprising identification information of a control plane (CP) function node. The identification information of the control plane (CP) function node could have been obtained during the first connection by means of the first access. Both the first connection by means of the first access and the second connection by means of the second access can be managed by means of the control plane (CP) function node.

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