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US 2023/0276392 A1Published application
Service access to disjoint network slices
AssigneeNEC Corporation
InventorsIskren IANEV, Toshiyuki Tamura, Kundan Tiwari
Life of this patent
Estimating the term…
Abstract
The disclosure is addressing the service access to disjoint network slices. It proposes solutions for on demand registration to a disjoint network slice(s) and a switch between disjoint network slices with minimum interruption. This allows for isolation between the network slices leading to improved 5G security and integrity in the data exchange.
Claims15
1-15. (canceled)
A communication terminal comprising:
- at least one memory storing instructions, and
- at least one processor configured to execute the instructions to;
- receive from a core network node, a first Non-Access Stratum,
- NAS, message including first information that indicates a S-NSSAI in a list of configured NSSAI is a subject for an on-demand registration;
- when an application in the communication terminal requests to use a service using the S-NSSAI, send to the core network node, a second Non-Access Stratum, NAS, message including the S-NSSAI set to Requested NSSAI, and:
- initiate PDU session establishment procedure with the S-NSSAI.
3 more elements
A core network node comprising:
- at least one memory storing instructions, and
- at least one processor configured to execute the instructions to;
- transmit to a communication terminal, a first Non-Access Stratum, NAS, message including first information that indicates a S-NSSAI in a list of configured NSSAI is an on-demand S-NSSAI;
- when an application in the communication terminal requests to use a service using the S-NSSAI, receive from the communication terminal, a second Non-Access Stratum, NAS, message including the S-NSSAI set to Requested NSSAI, and:
- perform a PDU session establishment procedure with the S-NSSAI when the core network node receives the PDU session establishment request message from the communication terminal.
2 more elements
A method for a communication terminal, the method comprising:
- receiving from a core network node, a first Non-Access Stratum, NAS, message including first information that indicates a S-NSSAI in a list of configured NSSAI is a subject for an on-demand registration;
- when an application in the communication terminal requests to use a service using the S-NSSAI, sending to the core network node, a second Non-Access Stratum, NAS, message including the S-NSSAI set to Requested NSSAI, and:
- initiating PDU session establishment procedure with the S-NSSAI.
A method for a core network node, the method comprising:
- transmitting to a communication terminal, a first Non-Access Stratum, NAS, message including first information that indicates a S-NSSAI in a list of configured NSSAI is an on-demand S-NSSAI;
- when an application in the communication terminal requests to use a service using the S-NSSAI, receiving from the communication terminal, a second Non-Access Stratum, NAS, message including the S-NSSAI set to Requested NSSAI, and:
- performing a PDU session establishment procedure with the S-NSSAI when the core network node receives the PDU session establishment request message from the communication terminal.
Dependencies are inferred from the claim text.