Abstract: Apparatuses, methods, and systems are disclosed for determining a time to perform an update. One method (900) includes transmitting (902) first information indicating an initial value. The method (900) includes transmitting (904) second information indicating an update interval corresponding to the initial value. The method (900) includes updating (906) an identifier at a time determined based on the initial value and the update interval.

Abstract: The method proposes to establish at least one session between the User Equipment and the Session Management Function node, and initiate session deactivation for a session indicated by the User Plane Function node, upon detection inactivity of User Plane connection for the session for a period by the User Plane Function node.

Abstract: The method proposes to establish at least one session between the User Equipment and the Session Management Function node, and initiate session deactivation for a session indicated by the User Plane Function node, upon detection inactivity of User Plane connection for the session for a period by the User Plane Function node.

Abstract: A method of facilitating P-CSCF restoration when a P-CSCF failure has occurred is disclosed. The method comprises a Proxy Call Session Control Function, ‘P-CSCF’ receiving a Session Initiation Protocol, ‘SIP’, message when said P-CSCF has been selected as an alternative P-CSCF to a failed P-CSCF and providing, to an associated Policy and Charging Rules Function, ‘PCRF’, a message comprising an indication that P-CSCF restoration is required.

Abstract: Apparatuses, methods, and systems are disclosed for determining remote unit behavior parameters. One method includes receiving a message including parameters associated with an application in a remote unit. The method includes determining a first set of parameters including a first portion of the parameters, wherein each parameter of the first set of parameters corresponds to a remote unit behavior. The method includes determining a second set of parameters including a second portion of the parameters, wherein each parameter of the second set of parameters corresponds to a service behavior. The method includes associating the second set of parameters with a data network name, a single network slice selection assistance information, or a combination thereof.

Abstract: Apparatuses, methods, and systems are disclosed for indicating a network for a remote unit. One method (600) includes transmitting (602) a first message including a first registration request from a remote unit (102). The first message includes a discovery indication indicating that the remote unit (102) is attempting to discover a network configured for use by the remote unit (102). The method (600) includes receiving (604) a second message including a list of networks configured for use by the remote unit (102). The second message is received in response to transmitting (602) the first message. The method (600) includes transmitting (606) a third message including a second registration request from the remote unit (102). The second registration request includes an indication of a network selected from the list of networks configured for use by the remote unit (102).

Abstract: Apparatuses, methods, and systems are disclosed for determining remote unit behavior parameters. One method includes receiving a message including parameters associated with an application in a remote unit. The method includes determining a first set of parameters including a first portion of the parameters, wherein each parameter of the first set of parameters corresponds to a remote unit behavior. The method includes determining a second set of parameters including a second portion of the parameters, wherein each parameter of the second set of parameters corresponds to a service behavior. The method includes associating the second set of parameters with a data network name, a single network slice selection assistance information, or a combination thereof.

Abstract: Apparatuses, methods, and systems are disclosed for indicating a network for a remote unit. One method includes transmitting a first message including a first registration request from a remote unit. The method includes receiving a second message including a first indication of a network to which the remote unit belongs. The second message is received in response to transmitting the first message. The method includes transmitting a third message including a second registration request from the remote unit. The second registration request includes a second indication of the network to which the remote unit belongs, and the second indication is based on the first indication.

Abstract: Apparatuses, methods, and systems are disclosed for selecting a transport layer protocol for SIP messaging. One apparatus includes a processor and a transceiver that receives a SIP message from a remote unit, the SIP message comprising a first request to initiate a session for an IMS MMTEL. The processor determines that the SIP message is communicated using TCP as a transport layer protocol and forwards the first request to a network entity, wherein the first request is sent using UDP as the transport layer protocol.

Abstract: The present disclosure aims to provide a communication system capable of achieving advanced security in a 5G communication system. The communication system according to the present disclosure includes: a communication terminal (10); an Access and Mobility Management (AMF) entity (20) configured to execute Mobility Management (MM) processing regarding the communication terminal (10); and a Session Management Function (SMF) entity (30) configured to execute Session Management (SM) processing regarding the communication terminal (10), in which the communication terminal (10) sends an MM message used in the MM processing, a first security key having been applied to the MM message, between the communication terminal and the AMF entity (20), and sends an SM message used in the SM processing, a second security key having been applied to the SM message, between the communication terminal and the SMF entity (30) via the AMF entity (20).

Abstract: An object is to provide a communication terminal capable of using a newly-generated network slice or service. A communication terminal (10) according to the present disclosure includes a communication unit (11) configured to receive a parameter related to SM-NSSAI (Session Management-Network Slice Selection Assistance Information) from a core network when subscriber information of the communication terminal itself managed in the core network or a location of the communication terminal itself is changed, and a control unit (12) configured to update NSSAI by using the parameter related to the SM-NSSAI, the NSSAI being managed to select a network slice.

Abstract: Apparatuses, methods, and systems are disclosed for indicating a network for a remote unit. One method (600) includes transmitting (602) a first message including a first registration request from a remote unit (102). The method (600) includes receiving (604) a second message including a first indication of a network to which the remote unit (102) belongs. The second message is received in response to transmitting (602) the first message. The method (600) includes transmitting (606) a third message including a second registration request from the remote unit (102). The second registration request includes a second indication of the network to which the remote unit (102) belongs, and the second indication is based on the first indication.

Abstract: A method for operating a wireless network, which includes a management entity for managing the use of network resources, includes, by the management entity: performing a network traffic forecast for a time period, the network traffic forecast estimating expected traffic demands with a predefined or tunable confidence degree; dividing forecasted available network resources into one or more classes of traffic corresponding to different service qualities within the classes of traffic using the confidence degree; and defining and allocating at least one network resource slice of at least one of the one or more classes of traffic to operators and/or third parties for the time period considering a service level agreement (SLA) of incoming service requests.

Abstract: A method and apparatus provide for security for restricted local operator services. At least one of a restricted local operator services indication and security capabilities associated with the restricted local operator services can be sent. A non-access stratum key exchange request including a symmetric root key can be received. The symmetric root key can be encrypted with a public key. The non-access stratum key exchange request can be acknowledged. A non-access stratum security key can be derived with the symmetric root key. Radio interface keys for user plane and radio resource control can be derived with the symmetric root key.

Abstract: Apparatuses, methods, and systems are disclosed for establishing an IP multimedia subsystem session. One method includes receiving, at a first network entity from a user device, a first session initiation protocol message comprising a session description protocol, wherein the first session initiation protocol message is used to establish an internet protocol multimedia subsystem session for an application. The method includes transmitting, from the first network entity to a second network entity, a first message comprising an internet protocol address and an identifier for the application. The method includes receiving, at the first network entity from the second network entity, a status of a radio access technology of the user device, wherein the status of the radio access technology of the user device is received by the second network entity from a third network entity.

Abstract: A purpose of the present disclosure is to provide a communication system that are capable of maintaining a high security level in each divided network in the case of applying network slicing to a core network. A communication system according to the present disclosure includes a subscriber-information management apparatus (10) configured to manage subscriber information of a communication terminal; and a security apparatus (20) configured to manage identification information of the communication terminal in association with security information used in at least one network slice system usable by the communication terminal. The subscriber-information management apparatus (10) acquires, using the identification information of the communication terminal and identification information of a network slice system used by the communication terminal, security information used in the network slice system used by the communication terminal from the security apparatus (20).

Abstract: Apparatuses, methods, and systems are disclosed for transmitting and/or receiving rogue unit detection information. One method includes maintaining rogue unit detection information. The rogue unit detection information includes a public key and a validity time corresponding to the public key. The method includes determining whether the validity time for the public key is within an expiration window. The method includes, in response to determining that the validity time for the public key is within the expiration window, transmitting a request for new rogue unit detection information. In some embodiments, the method includes receiving the new rogue unit detection information.

Abstract: A mobile network system comprises a security device and a network device. The security device stores slice security requirements which are different for each slice ID (identification). The slice ID indicates a network slice in a core network. The network device transmits, to the security device, a Slice Security Request including the slice ID. The network device receives, from the security device, a Slice Security Response including the slice security requirements related to the slice ID. The network device selects, based on the slice security requirements, a security algorithm for the network slice.

Abstract: A core network node includes a transmitter configured to transmit a control plane data back-off timer to restrict a request from a UE for data transmission via Control Plane CIoT EPS Optimization. A UE includes a receiver configured to receive a control plane data back-off timer from a core network node, and a controller configured to not initiate data transmission via Control Plane CIoT EPS Optimization while the control plane data back-off timer is running.

Abstract: Apparatuses, methods, and systems are disclosed for establishing an IP multimedia subsystem session. One method includes receiving, at a first network entity from a user device, a first session initiation protocol message comprising a session description protocol, wherein the first session initiation protocol message is used to establish an internet protocol multimedia subsystem session for an application. The method includes transmitting, from the first network entity to a second network entity, a first message comprising an internet protocol address and an identifier for the application. The method includes receiving, at the first network entity from the second network entity, a status of a radio access technology of the user device, wherein the status of the radio access technology of the user device is received by the second network entity from a third network entity.