Method and wireless device for handling PDU session in 5G mobile communication

    公开(公告)号:US11350475B2

    公开(公告)日:2022-05-31

    申请号:US16926185

    申请日:2020-07-10

    Abstract: Systems and techniques for handling a protocol data unit (PDU) session by a wireless device implementing an access stratum (AS) layer and a non-access stratum (NAS) layer in a wireless communication system. An example technique includes determining, by the AS layer of the wireless device, whether a user plane for the PDU session is activated or released; transferring, by the AS layer and to the NAS layer of the wireless device based on a determination that the user plane for the PDU session is activated, first information indicating that the user plane for the PDU session is activated; and transferring, by the AS layer and to the NAS layer of the wireless device based on a determination that the user plane for the PDU session is released, second information indicating that the user plane for the PDU session is released.

    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.

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