A user equipment, UE, comprising: a storage unit configured to store local area data network, LADN, information; a transceiving unit configured to receive a registration accept message from an access and mobility management function, AMF, in a registration procedure for mobility and registration update; and a control unit, wherein: when the AMF does not include the LADN information in the registration accept message in the registration procedure, the control unit is configured to: delete the stored LADN information, recognize that the UE is located outside an LADN service area of an LADN, and initiate a UE-requested protocol data unit, PDU, session release procedure by transmitting a PDU session release request message to request a session management function, SMF to release a PDU session for the LADN, and during the UE-requested PDU session release procedure: the transceiving unit is configured to receive a PDU session release command message from the SMF as a response message in response to the UE-requested PDU session release procedure, and the control unit is configured to release the PDU session for the LADN based on reception of the PDU session release command message from the SMF. a storage unit configured to store local area data network, LADN, information; a transceiving unit configured to receive a registration accept message from an access and mobility management function, AMF, in a registration procedure for mobility and registration update; and a control unit, wherein: when the AMF does not include the LADN information in the registration accept message in the registration procedure, the control unit is configured to: delete the stored LADN information, recognize that the UE is located outside an LADN service area of an LADN, and initiate a UE-requested protocol data unit, PDU, session release procedure by transmitting a PDU session release request message to request a session management function, SMF to release a PDU session for the LADN, and during the UE-requested PDU session release procedure: the transceiving unit is configured to receive a PDU session release command message from the SMF as a response message in response to the UE-requested PDU session release procedure, and the control unit is configured to release the PDU session for the LADN based on reception of the PDU session release command message from the SMF. delete the stored LADN information, recognize that the UE is located outside an LADN service area of an LADN, and initiate a UE-requested protocol data unit, PDU, session release procedure by transmitting a PDU session release request message to request a session management function, SMF to release a PDU session for the LADN, and during the UE-requested PDU session release procedure: the transceiving unit is configured to receive a PDU session release command message from the SMF as a response message in response to the UE-requested PDU session release procedure, and the control unit is configured to release the PDU session for the LADN based on reception of the PDU session release command message from the SMF. the transceiving unit is configured to receive a PDU session release command message from the SMF as a response message in response to the UE-requested PDU session release procedure, and the control unit is configured to release the PDU session for the LADN based on reception of the PDU session release command message from the SMF.