METHOD FOR MANAGING SESSION, AND SMF NODE FOR PERFORMING METHOD

    公开(公告)号:US20210136719A1

    公开(公告)日:2021-05-06

    申请号:US16619380

    申请日:2017-10-30

    摘要: Provided in one disclosure of the present specification is a method by which a session management function (SMF) node manages a session. The method can comprise the steps of: transmitting, to an access and mobility management function (AMF) node, a registration request for notifying of state information of user equipment (UE) capable of accessing a local area data network (LADN) through any one of a first access network and a second access network; receiving, from the AMF node, changed state information when the state information of the UE is changed; and determining whether to release or deactivate a PDU session of the UE on the basis of the received information.

    Method for selecting network node in wireless communication system and device therefor

    公开(公告)号:US10791508B2

    公开(公告)日:2020-09-29

    申请号:US16461660

    申请日:2017-11-16

    IPC分类号: H04W4/00 H04W48/18 H04W60/00

    摘要: A method for selecting a serving AMF of a network node in a wireless communication system includes receiving a registration request message of a user equipment (UE), the registration request message including a network slice selection assistance information (NSSAI) for a slice requested by the UE and priority information of the NSSAI; determining whether the NSSAI is valid for the UE; when the NSSAI is valid for the UE, searching a first AMF which is able to support the NSSAI based on the priority information; and when the first AMF is searched, selecting the first AMF as the serving AMF serving the UE and transmitting the registration request message to the first AMF.

    Method and wireless device for transmitting RRC message when using CP CIOT EPS optimization

    公开(公告)号:US10764937B2

    公开(公告)日:2020-09-01

    申请号:US16092951

    申请日:2017-01-09

    摘要: Provided is a method for a wireless device for transmitting an RRC message according to one disclosure of the present specification. The method may comprise a step for an NAS stratum of the wireless device transmitting an NAS signaling request message to an AS layer to transmit the former to a network node. The NAS signaling request message can comprise therein an indication of one or both preferred or required plans from among the plans for optimizing the EPS for CIoT using a control plane (CP) or a user plane (UP). The method may comprise a step for the NAS stratum of the wireless device receiving, from the AS stratum, an NAS signaling acceptance message or NAS signaling rejection message from the network node.

    METHOD FOR TRANSMITTING RRC MESSAGE AND WIRELESS DEVICE

    公开(公告)号:US20190320485A1

    公开(公告)日:2019-10-17

    申请号:US16348257

    申请日:2017-11-09

    摘要: A disclosure of the present specification provides a method for transmitting a radio resource control (RRC) message by a wireless device. The method may comprise the steps of: acquiring, by an access stratum (AS) layer of a wireless device, at least one of the value and indication of an RRC establishment cause field from a non-access stratum (NAS) layer which requests transmission of an NAS signaling request message; transmitting, to a base station, an RRC connection request message including the at least one of the value and indication of the RRC establishment cause field; and when the at least one of the value and indication of the RRC establishment cause field is set to a value, which indicates that the NAS signaling request message includes user data, according to an optimization scheme through a control plane (CP), if a network is in an overload state, receiving an RRC connection rejection message or an RRC connection release request message from the base station.