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US 10,856,249 B2Granted
Method and system for transmission of SUSI in the NAS procedure
AssigneeNEC Corporation
InventorsKundan Tiwari, Toshiyuki Tamura, Sheeba Backia Mary Baskaran
Life of this patent
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Abstract
The present disclosure is related to sending of a one time identifier of a UE during the NAS procedure. Specifically, the present disclosure relates to determining whether to use same one time identifier or different one time identifier during registration retry procedure.
Claims10
A method for a User Equipment (UE), the method comprising:
- sending, to an Access and mobility Management Function (AMF), a Non-Access Stratum (NAS) message, the NAS message including a first Subscribed Unique Concealed Identifier (SUCI) for identifying the UE, wherein the first SUCI is generated by concealing a Subscriber Unique Permanent Identifier (SUPI) for permanently identifying the UE;
- and
- starting a timer, in a case where the NAS message has been sent,
- wherein the method further comprises:
- sending, to the AMF, a Deregistration Request message, as a deregistration procedure, wherein
- the Deregistration Request message includes the first SUCI that was sent in the NAS message if the timer is running, or
- the Deregistration Request message includes a second SUCI that is generated by concealing the SUPI if the timer is not running, the second SUCI being different from the first SUCI.
4 more elements
A User Equipment (UE) comprising:
- a transceiver configured to communicate with a Next Generation Radio Access Network (NG-RAN);
- and
- a controller configured to send, to an Access and mobility Management Function (AMF) via the NG-RAN, a Non-Access Stratum (NAS) message, the NAS message including a first Subscribed Unique Concealed Identifier (SUCI) for identifying the UE,
- wherein the first SUCI is generated by concealing a Subscriber Unique Permanent Identifier (SUPI) for permanently identifying the UE,
- wherein the controller is further configured to:
- start a timer, in a case where the NAS message has been sent, and
- send, to the AMF via the NG-RAN, a Deregistration Request message, as a deregistration procedure, wherein
- the Deregistration Request message includes the first SUCI that was sent in the NAS message if the timer is running, or
- the Deregistration Request message includes a second SUCI that is generated by concealing the SUPI if the timer is not running, the second SUCI being different from the first SUCI.
6 more elements
Dependencies are inferred from the claim text.