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Title:
METHOD OF UE, METHOD OF GEOGRAPHICALLY SELECTED AMF APPARATUS, UE, GEOGRAPHICALLY SELECTED AMF APPARATUS, AND METHOD OF COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2023/068119
Kind Code:
A1
Abstract:
[Problem] When a UE moves from one PLMN to another PLMN and mobility from a non-geographically selected AMF to a geographically selected AMF is performed, there is a case where the geographically selected AMF cannot obtain a UE context. This leads to loss of the services. [Solution] A method of a User Equipment (UE) includes initiating registration procedure. The method includes sending a registration request message. The registration request message includes first 5G Globally Unique Temporary Identifier (5G-GUTI), a first Non-Access-Stratum (NAS) container, second 5G-GUTI, and a second NAS container. The first NAS container includes a first integrity protected registration request message. The first integrity protected registration request message is the registration request message which is integrity protected based on a first NAS security context. The second NAS container includes a second integrity protected registration request message. The second integrity protected registration request message is the registration request message which is integrity protected based on a second NAS security context.

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Inventors:
TIWARI KUNDAN (JP)
TAMURA TOSHIYUKI (JP)
IANEV ISKREN (JP)
Application Number:
PCT/JP2022/037967
Publication Date:
April 27, 2023
Filing Date:
October 12, 2022
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H04W60/04; H04W8/26; H04W36/12
Domestic Patent References:
WO2021156347A12021-08-12
Other References:
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Procedures for the 5G System (5GS); Stage 2 (Release 17)", 3GPP TS 23.502, no. V17.2.1, 29 September 2021 (2021-09-29), pages 1 - 712, XP052056888
Attorney, Agent or Firm:
KITAJIMA Hiroshi et al. (JP)
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