De-registration method in wireless communication system and device therefor

    公开(公告)号:US10624053B2

    公开(公告)日:2020-04-14

    申请号:US16065075

    申请日:2017-11-22

    Abstract: An aspect of the present invention relates to a UE-initiated de-registration method by an AMF in a wireless communication system, and comprises the steps of: receiving, from UE, a de-registration request message that requests de-registration, wherein the de-registration request message includes de-registration type information and first access type information indicating a target access to which the de-registration is to be applied; requesting, when the UE has an established protocol data unit (PDU) session through the target access, an SMF to release the established PDU session; and transmitting a de-registration accept message to the UE depending on the de-registration type.

    Method for using PS data off function and user equipment

    公开(公告)号:US10595348B2

    公开(公告)日:2020-03-17

    申请号:US16464899

    申请日:2017-07-31

    Abstract: One disclosure of the present specification provides a method for using packet switching (PS) data off function in user equipment (UE). The method can comprise the steps of: determining whether a session management (SM) delay time timer or a mobility management (MM) delay time timer is being operated, in a state in which the transmission of a non-access stratum (NAS) request message for an SM is required according to a request for the activation or the inactivation of the PS data off function; and, according to the result of the determination, allowing an NAS layer of the UE to include activation or inactivation state information of the PS data off function in the NAS request message for an SM and transmit the same.

    Group communication method and device for providing proximity service

    公开(公告)号:US10484838B2

    公开(公告)日:2019-11-19

    申请号:US14767872

    申请日:2014-02-28

    Abstract: The present invention relates to a method and a device for performing group communication based on a proximity service (ProSe) in a wireless communication system. More specifically, the method comprises the steps of: enabling a relay terminal (relay user equipment, relay UE, ProSe UE-to-Network relay) to register group communication in a network node; and enabling the relay terminal to perform the group communication with the network node, wherein the group communication is configured to transmit a downlink signal using a multimedia broadcast and multimedia service (MBMS) if the number of terminals, except for a relayed terminal (relayed user equipment, relayed UE) among a plurality of terminals registered in the network node, is not less than a reference value.

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