User equipment (UE) and communication method for UE
A User Equipment (UE; terminal apparatus) includes a transmission and/or reception unit and a storage unit. The transmission and/or reception unit receives a first allowed Network Slice Selection Assistance Information (NSSAI) from a core network, and in a case that a registration area stored in the UE includes multiple pieces of tracking area information, the multiple pieces of tracking area information belong to different Public land mobile networks (PLMNs), and further the different PLMNs are Equivalent HPLMNs (EPLMNs), the storage unit stores the first allowed NSSAI received, in each allowed NSSAI associated with a corresponding one of the PLMNs.
1 . A User Equipment (UE) comprising:
transmission and reception circuitry; and
a controller,
wherein:
the transmission and reception circuitry is configured to receive a control message including a first allowed Network Slice Selection Assistance Information (NSSAI), including a first Single-Network Slice Selection Assistance Information (S-NSSAI) and a first mapped S-NSSAI, from a core network, and
when:
the transmission and reception circuitry receives the control message, and
a registration area contains Tracking Area Identities (TAIs) belonging to different Public land mobile networks (PLMNs), which are Equivalent PLMNs (EPLMNs),
the controller is configured to store the first S-NSSAI included in the control message in each of allowed NSSAIs that is associated with each of the different PLMNs and with a current access type, and
the controller is configured to delete a stored mapped S-NSSAI for an allowed NSSAI that is associated with each of the different PLMNs and with the current access type and store the first mapped S-NSSAI included in the first allowed NSSAI.
2 . A communication control method performed by a User Equipment (UE), the communication control method comprising:
receiving a control message including a first allowed Network Slice Selection Assistance Information (NSSAI), including a first Single-Network Slice Selection Assistance Information (S-NSSAI) and a first mapped S-NSSAI, from a core network; and
when:
the UE receives the control message, and
a registration area contains Tracking Area Identities (TAIs) belonging to different Public land mobile networks (PLMNs), which are Equivalent PLMNs (EPLMNs),
storing the first S-NSSAI included in the control message in each of allowed NSSAIs that is associated with each of the different PLMNs and with a current access type, and
deleting a stored mapped S-NSSAI for an allowed NSSAI that is associated with each of the different PLMNs and with the current access type and
storing the first mapped S-NSSAI included in the first allowed NSSAI.