Invention Grant
- Patent Title: Steering of roaming in 5G systems
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Application No.: US16276968Application Date: 2019-02-15
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Publication No.: US11184756B2Publication Date: 2021-11-23
- Inventor: Vivek G. Gupta , Abhijeet Ashok Kolekar , Farid Adrangi
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04W8/04
- IPC: H04W8/04 ; H04W8/06 ; H04W8/16 ; H04W76/38 ; H04W76/50 ; H04W36/00 ; H04W76/27 ; H04W12/06 ; H04W12/102 ; H04W12/108 ; H04W84/04

Abstract:
Systems and methods of providing steering of roaming (SOR) information in a 5G VPLMN are described. A UE receives a REGISTRATION ACCEPT message from an AMF of the VPLMN during initial or mobility registration of the UE in the VPLMN and DL NAS TRANSPORT message thereafter. The message has a Payload container information element (IE) set to secured packet. The SOR information indicates a list of preferred PLMN/access technology combinations, which is uploaded to a memory after a successful security check to verify that the list of preferred PLMN/access technology combinations is provided by the UDM of the HPLMN and is not tampered with by the VPLMN. When the message also contains a request for acknowledgment of successful security check of the list of preferred PLMN/access technology combinations, the UE transmits to the AMF the acknowledgment in a REGISTRATION COMPLETE or a DL NAS TRANSPORT message.
Public/Granted literature
- US20190182655A1 STEERING OF ROAMING IN 5G SYSTEMS Public/Granted day:2019-06-13
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