Abstract: An Access and Mobility Management Function (AMF) device for communicating with a User equipment (UE) and a Network Slice Admission Control Function (NSACF) device includes a receiver and a transmitter. The receiver is configured to receive, from the UE, a Registration Request message including first information indicating whether the UE supports a first function and requested Network Slice Selection Assistance Information (NSSAI). The transmitter is configured to transmit, to the UE, a Non-Access Stratum (NAS) message including a rejected NSSAI including a first cause value and a back-off timer value if the UE supports the first function. The transmitter is configured to transmit, to the UE, the NAS message including a rejected NSSAI including a second cause value if the UE does not support the first function.

Abstract: An aspect of this disclosure includes a method of a user equipment (UE). The method includes communicating with a communication apparatus. The method includes keeping staying in a first Public Land Mobile Network (PLMN) by stopping a timer or by ignoring expiry of the timer or by overriding the timer in a case where the UE is in the first PLMN and a second PLMN. The timer is configured to make the UE to return to the second PLMN in a case of expiry of the timer. The second PLMN is a Home Public Land Mobile Network (HPLMN) of the UE.

Abstract: An aspect of this disclosure includes a method performed by a first communication apparatus. The method includes: receiving a first message from a second communication apparatus for Network Slice Admission Control (NSAC) for a maximum number of User Equipments (UEs) with at least one Protocol Data Unit (PDU) session/Packet Data Network (PDN) connection based on a UE establishing a PDU session/PDN connection associated with a network slice in the second communication apparatus; and performing NSAC for the maximum number of UEs with at least one PDU session/PDN connection in case of EPC interworking.

Abstract: An aspect of this disclosure includes a method of a radio communication apparatus. The method includes communicating with a core network apparatus. The method includes receiving from the core network apparatus, first information indicating a Public Land Mobile Network (PLMN) to be added as a PLMN which shares a Radio Access Network (RAN). The RAN adds the PLMN based on the first information. An aspect of this disclosure includes a method of the core network apparatus. The method includes communicating with the radio communication apparatus. The method includes transmitting to the radio communication apparatus, first information indicating a Public Land Mobile Network (PLMN) to be added as a PLMN which shares a Radio Access Network (RAN).

Abstract: An aspect of this disclosure includes a radio station. A method for a radio station includes: communicating with a User Equipment (UE); and sending, to the UE, information indicating that the radio station offers service, wherein the UE is located in a disaster condition, wherein the UE is located in a 5G network, wherein the radio station is located in an Long Term Evolution (LTE) network.

Abstract: An aspect of this disclosure includes a method of a User Equipment (UE). The method includes receiving Target Network Slice Selection Assistance Information (NSSAI). The method includes performing a cell selection or a cell reselection based on the Target NSSAI.

Abstract: An aspect of this disclosure includes a method of a User Equipment (UE). The method includes sending a first message to a communication apparatus in a first Visited Public Land Mobile Network (VPLMN). The first message includes a request for first information. The first information indicates a network slice which is available in a second VPLMN. The second VPLMN is different from the first VPLMN. The method includes performing PLMN selection in a case of not receiving the first information.

Abstract: An aspect of this disclosure includes a method of a User Equipment (UE). The method includes communicating with a communication apparatus. The method includes receiving from the communication apparatus, first signal threshold Information and performing a PLMN selection based on the first signal threshold Information. The present disclosure may relate to a method of a user equipment (UE), a method of a communication apparatus, a UE, and, and a communication apparatus.

Abstract: An aspect of this disclosure includes a method of an Access and Mobility Management Function (AMF) in a network that provides access to a localized service. The method includes: performing registration with a plurality of User Equipments (UEs) for the localized service; and controlling a deregistration of part of the plurality of UEs, in a case where the localized service is ended.

Abstract: An aspect of this disclosure includes a method of a User Equipment (UE). The method includes communicating with an Access and Mobility Management Function (AMF). The method includes selecting a first Network Slice Access Stratum (AS) Group (NSAG) and a first NSAG priority based on Allowed Network Slice Selection Assistance Information (NSSAI) and Pending NSSAI.

Abstract: In the current 3GPP specifications, there are some unclear situations regarding the NSSAA procedure. An aspect of this disclosure includes a method of a first communication apparatus. The method includes communicating with a second communication apparatus. The method includes sending Requested Network Slice Selection Assistance Information (NSSAI) to the second communication apparatus in a case where the first communication apparatus has Pending NSSAI. The Requested NSSAI includes the Pending NSSAI.

Abstract: An AMF apparatus (3) receives a NAS message for requesting a core network to establish or activate a PDU session associated with an allowed network slice identifier, from a UE (4), via a first cell (10) not supporting the allowed network slice identifier and via a first AN node (1) that provides the first cell (10). In response to receiving the NAS message, the AMF apparatus (3) sends to the first AN node (1) a control message that causes the first AN node (1) to move the UE (4) to a second cell (20) that supports the allowed network slice identifier. This can contribute, for example, to enabling an establishment or activation of a PDU session associated with a network slice that is supported only in sparsely (or patchily) placed local cells.

Abstract: An operations, administration and maintenance (OAM) function provides service level specification (SLS) assurance by executing a method. The method includes: determining at least one policy for SLS assurance for a user equipment (UE) to be used in automatic quality of experience (QoE) measurement reporting, the at least one policy comprising an associated QoE measurement reporting criterion and a reporting format; and transmitting the at least one policy towards the UE.

Abstract: There are many ambiguous descriptions in 3GPP specification(s) how to handle the NSSRG feature. A method of a user equipment (UE) includes communicating with a communication apparatus. The method includes sending a Registration Request message. The Registration Request message includes Requested Network Slice Selection Assistance Information (NSSAI). The Requested NSSAI includes first Single Network Slice Selection Assistance Information (S-NSSAI). The first S-NSSAI and second S-NSSAI in Pending NSSAI are associated with at least one common Network Slice Simultaneous Registration Group (NSSRG) value.

Abstract: There are many ambiguous descriptions in 3GPP specification(s) how to handle the NSSRG feature. A method of a communication apparatus includes communicating with a user equipment (UE) and sending a Registration Accept message in a case where first Single Network Slice Selection Assistance Information (S-NSSAI) of Requested Network Slice Selection Assistance Information (NSSAI) in a Registration Request message over first access and second S-NSSAI of Allowed NSSAI over second access are not associated with a common Network Slice Simultaneous Registration Group (NSSRG) value. The Registration Accept message includes Configured NSSAI.

Abstract: Please delete the Abstract of the Disclosure, and replace it with the following: In the current 3GPP standard(s), there is no mechanism or procedure for Key issue. This disclosure provides a solution to this key issue. A method for a User Plane Function (UPF) includes receiving, from a core network node, at least one of Users Equipment ID (UE ID), Data Network Name (DNN), Single-Network Slice Selection Assistance Information (S-NSSAI) and information related to UE Route Selection Policy rule (URSP). The method includes checking whether user data for a User Equipment (UE) using a User Equipment (UE) session with the DNN and S-NSSAI matches the information related to UE Route Selection Policy rule (URSP) or not. The method includes sending to the core network node a result of the checking.

Abstract: The present disclosure proposes solutions for monitoring, controlling and enforcement the number of the UEs per Network Slice quota in roaming. It proposes new Network Slice Quota (NSQ) service and service operations for Network Slice quota subscription, monitoring, update and notification in both, the home network and in the visiting network.

Abstract: This disclosure proposes solutions for providing a resiliency of gNB-CU against possible node failures. The node failure includes unexpected system reset, system rebooting, system stall, system congestion and communication failure with neighboring nodes. A method of a gNB Distributed Unit (gNB-DU) apparatus includes communicating with a User Equipment, and communicating with a plurality of a gNB Centralized Unit Control Plane (gNB-CU-CP) apparatuses.

Abstract: The present document proposes enablers for multiple user identities per UE. It defines user identity profiles for the users sharing the same UE and it allows for these user identity profiles to be provisioned in the UE's subscription information. The proposal enables multi user UEs to register at the same time for one or more users that are sharing the UE with optional extra user-specific authentication and authorisation. When registered, such a multi user UE can initiate per user PDU Session establishment and also can be paged for per user (one or more users) mobile terminated services.

Abstract: This disclosure proposes a network function node in a core network, comprising: means for receiving, from User Equipment, UE, a non access stratum, NAS, message including identity information for the UE, and a plurality of user identity information, each of which includes a user identifier for a user that uses the UE; and means for sending, to a policy control and charging function node in the core network, the plurality of the user identity information for creating a Policy and Charging Control, PCC, rule based on the plurality of the user identity information.