US 12,075,241 B2
AMF node and method thereof
Toshiyuki Tamura, Tokyo (JP); and Tsuyoshi Takakura, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/628,964
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Dec. 18, 2020, PCT No. PCT/JP2020/047479
§ 371(c)(1), (2) Date Jan. 21, 2022,
PCT Pub. No. WO2021/132093, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-237391 (JP), filed on Dec. 26, 2019.
Prior Publication US 2022/0264295 A1, Aug. 18, 2022
Int. Cl. H04W 12/06 (2021.01); H04W 76/30 (2018.01); H04W 84/04 (2009.01)
CPC H04W 12/06 (2013.01) [H04W 76/30 (2018.02); H04W 84/042 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A first communication apparatus comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive, from a second communication apparatus, a first message indicating a failure of authentication of a first Single-Network Slice Selection Assistance Information (S-NSSAI) for a user equipment in a re-authentication and re-authorization;
send, to a third communication apparatus, a second message requesting to release a Protocol Data Unit (PDU) session in a case where the at least one processor receives the first message; and,
send, to the UE, a Non-Access Stratum (NAS) message for instructing an update of a UE configuration after the at least one processor receives the first message,
wherein the second message includes a cause information element indicating the failure of the authentication in the re-authentication and re-authorization,
wherein the PDU session is associated with the first S-NSSAI, and
wherein the NAS message indicates that the first S-NSSAI is included in a Rejected Network Slice Selection Assistance Information (NSSAI).