Abstract: A user device for implementing error handling is provided. The user device comprises a control unit that establishes, in a Protocol Data Unit (PDU) session establishment procedure using a Local Area Data Network (LADN) Data Network Name (DNN), a PDU session for the LADN; and a transceiver unit that prohibits transmission of a PDU session modification request message for the PDU session, in a PDU session modification procedure, based on reception of a specific cause value, wherein the LADN DNN is provided by the user device in the PDU session establishment procedure.

Abstract: A unit is provided through an application of a disaster condition to a PLMN in 5GS, the unit being for transmitting and/or receiving a notification in a case that a communication service cannot be provided to a UE and for selecting a roaming destination PLMN by the UE. Provided are a procedure to allow the UE to recognize a state of a certain PLMN and transmit and/or receive information for appropriately selecting a PLMN as a moving destination in a case that a disaster condition applies or no longer applies to the certain PLMN, a method of selecting a PLMN based on information received and stored by the UE through a notification from the PLMN or the like, and a communication unit.

Abstract: A User Equipment (UE) includes transmission and reception circuitry, and a controller, wherein while one or more Tsor-cm timers are running, and upon receiving a new Steering of roaming connected mode control information (SOR-CMCI), the controller sets a Tsor-cm timer value for an associated PDU session or service to a timer value in the new SOR-CMCI.

Abstract: A unit is provided through an application of a disaster condition to a PLMN in 5GS, the unit being for transmitting and/or receiving a notification in a case that a communication service cannot be provided to a UE and for selecting a roaming destination PLMN by the UE. Provided are a procedure to allow the UE to recognize a state of a certain PLMN and transmit and/or receive information for appropriately selecting a PLMN as a moving destination in a case that a disaster condition applies or no longer applies to the certain PLMN, a method of selecting a PLMN based on information received and stored by the UE through a notification from the PLMN or the like, and a communication unit.

Abstract: A User Equipment (UE) includes a controller. The controller is in automatic network selection mode, and the controller stops a Tsor-cm timer in a case that the controller switched to manual network selection mode and the Tsor-cm timer is running.

Abstract: Provided is a communication unit for implementing error processing of a control device of a core network and error processing of User Equipment in a case that connectivity to a Local Area Data Network (LADN) is not able to be provided in a 5GS. Provided is a communication unit for implementing error processing in which a request for establishing connectivity to a Local Area Data Network (LADN) requested by a user equipment is rejected by a control device of a core network in a case that the connectivity to the LADN is not able to be provided in a 5GS. Further, a communication unit for implementing appropriate error processing that User Equipment performs in a case that a request for establishing connectivity to the LADN is rejected.

Abstract: In a 5G System (5GS), control processing of a control apparatus in a core network and control processing of a User Equipment (UE) in a case that the UE does not store information related to a Non-Public Network (NPN) even though the UE needs to be connected to and registered with the NPN are not clarified. Provided are a communication unit for providing the UE with information of the Non-Public Network (NPN) and control processing in a case that the UE needs to connect to and be registered with the NPN in the 5G System (5GS). Further provided are a communication unit and control processing in a case that provision of the information of the NPN for the UE fails in the 5GS.

Abstract: Provided is, in 5GS, a communication unit for implementing a Vertical LAN. Provided are, in 5GS, a unit for registration of a UE, a session establishment procedure, and generation of a 5GLAN group for implementing the Vertical LAN and a 5GLAN service, a unit for starting communication using the Vertical LAN and the 5GLAN service, and the communication unit. In addition, provided are a unit for modifying a configuration of the UE registered with a network, a unit for managing an established session, a unit for deleting the 5GLAN group, a unit for deleting the UE from the 5GLAN group, and a unit for stopping communication using the Vertical LAN and the 5GLAN service.

Abstract: A procedure in updating information of a connection in associating an Unmanned Aerial Vehicle (UAV) with a UAV controller to establish the connection is not clarified. For the connection for performing communication of the UAV, a user plane resource is to be activated. The UAV updates stored identification information and IP address of the UAV controller, based on reception, from a network, of a PDU session modification command message including identification information and IP address of the UAV controller. The UAV, in a case of establishing a PDU session that provides a QoS flow for performing Command and Control (C2) communication, transmits and/or receives information for establishing an Always-on PDU session to and/or from a network.

Abstract: Provided is, in 5GS, a communication unit for implementing a Vertical LAN. Provided are, in 5GS, a unit for registration of a UE, a session establishment procedure, and generation of a 5GLAN group for implementing the Vertical LAN and a 5GLAN service, a unit for starting communication using the Vertical LAN and the 5GLAN service, and the communication unit. In addition, provided are a unit for modifying a configuration of the UE registered with a network, a unit for managing an established session, a unit for deleting the 5GLAN group, a unit for deleting the UE from the 5GLAN group, and a unit for stopping communication using the Vertical LAN and the 5GLAN service.

Abstract: A terminal apparatus or a device in a core network exchanges capability information for each function in a registration procedure or a PDU session establishment procedure, and in user data communication additional information is added into an uplink packet to implement terminal apparatus-initiated RQoS control, and additional information is added into a downlink packet to implement network device-initiated RQoS control. A dedicated control message and information for an authentication and/or authorization function by a DN are defined to implement the authentication and/or authorization function by the DN. Furthermore, the terminal apparatus and the device in the core network have a timer or a control process for each network slice to implement a management process such as congestion management for each network slice.

Abstract: A terminal apparatus and an apparatus in a core network exchange information indicating maintenance of a PDU session in a procedure for releasing UP resources, and thereby releases the UP resources associated with a specific PDU session while maintaining establishment of the specific PDU session. A terminal apparatus and an apparatus in a core network further exchange information indicating a release of only the UP resources in a procedure for releasing the UP resources, and thereby the terminal apparatus recognizes the release of the UP resources associated with the specific PDU session. In this manner, in order to release the UP resources associated with the specific PDU session while maintaining establishment of the specific PDU session, and to allow the terminal apparatus to recognize the release of the UP resources, a system and a communication control method are provided.

Abstract: Communications control in response to establishment of a multi-access PDN connection or with rejection of establishment of a multi-access PDN connection is performed based on a response to a PDN connectivity establishment request from a terminal device. This provides a method of communication control and the like in response to a multi-access PDN connectivity establishment request from the terminal device.

Abstract: Provided is a communication unit configured to allow a function for CIoT to be used even in a 5GS that supports a network-initiated configuration update procedure and a plurality of types of session and service continuities. Further provided is a communication unit configured to appropriately manage, by a user equipment, connection established between the user equipment and a network even in a case that a network-initiated change of a state of the user equipment has been performed. Thereby, the communication unit for implementing the function for CIoT in the 5GS and the communication unit for implementing a network-initiated procedure of changing the state of the user equipment are provided.

Abstract: The present invention provides a communication means that enables use of a function for providing connectivity to a local area data network (LADN) in a 5G system (5GS). Furthermore, the present invention provides a communication means that enables use of a function for providing connectivity to an LADN between a user equipment and a network when the use of the function for providing connectivity to an LADN is enabled.

Abstract: Provided are procedures for initial UE registration and periodic or movement-based registration, and a communication unit to achieve management of the maximum number of UEs connected to each slice in 5GS. Furthermore, a method for managing a timer running after completion of the registration procedure, and a method of registration procedure and a communication unit for both a UE in which the timer is running and a UE in which the timer is not running are provided, thus providing a communication unit to implement functions related to the management of the maximum number of UEs connected to each slice in 5GS.

Abstract: Provided is a communication unit for implementing functions for URLLC that requires communication of high reliability and/or low latency in the 5GS. Provided is a communication unit for enabling functions for URLLC even in the 5GS that supports a network-initiated configuration update procedure and multiple types of session and service continuity. Further, provided is a communication unit for, in a case that multiple types of functions for URLLC are possible, sharing which function out of the functions for URLLC is available and appropriately managing shared information between a user equipment and a network.

Abstract: A communicator is provided that, in a 5GS, in a case that a User Equipment (UE) is registered with a Non-Public Network (NPN) and a Local Area Data Network (LADN) is connectable, allows the UE to appropriately process information of the LADN received from a control apparatus of a core network. Furthermore, the communicator also allows the control apparatus of the core network to perform appropriate error processing in a case that a UE is registered with a Non-Public Network (NPN) and a Local Area Data Network (LADN) is not connectable. Thus, provided is the communicator that, in 5GS, in a case that the UE is registered with the Non-Public Network (NPN) and the Local Area Data Network (LADN) is connectable, implements processing of the control apparatus of the core network and processing of the UE.

Abstract: A UE transmits a registration request message including an S-NSSAI and receives a registration accept message including the S-NSSAI, a first cause value, and a first back-off timer value. The UE starts a back-off timer using the first back-off timer value corresponding to the S-NSSAI. In a case that the UE receives a configuration update command including the S-NSSAI, a second cause value, and a second back-off timer value before expiration of the back-off timer, the UE updates, in a case that the second back-off timer value indicates a value other than zero the back-off timer to be the second back-off timer value and stops, in a case that the second back-off timer value indicates zero, the back-off timer. In a case that the back-off timer expires or stops, the UE transmits the registration request message including the S-NSSAI or a PDU session establishment request message.

Abstract: According to an aspect of the present invention, provided are a procedure and a communicator for initial registration of UE or periodic or mobility-based registration for achieving Network Slice Specific Authentication and Authorization in 5GS. Furthermore, a communicator for achieving a function related to Network Slice Specific Authentication and Authorization in 5GS is provided by providing Network Slice Specific Authentication and Authorization initiated by a network, a procedure, initiated by the network and initiated based on completion of the Network Slice Specific Authentication and Authorization, for changing a UE configuration, a de-registration procedure initiated by the network, and a communicator.