公开(公告)号：US20220264295A1

公开(公告)日：2022-08-18

申请号：US17628964

申请日：2020-12-18

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W12/06 ,  H04W76/30

Abstract: In response to a failure of a re-authentication and re-authorization procedure for a first network slice identifier currently allowed to a UE (1), the AMF node (2) initiates a release procedure to release a Protocol Data Unit (PDU) session associated with the first network slice identifier. This, for example, allows the AMF to appropriately manage a network slice configuration stored in the UE.

公开(公告)号：US20240406856A1

公开(公告)日：2024-12-05

申请号：US18801940

申请日：2024-08-13

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W48/18 ,  H04W12/06 ,  H04W60/04 ,  H04W60/06

Abstract: It is intended to solve or at least reduce such a problem that a UE cannot know that a network is abnormal. A wireless terminal in an aspect of the present disclosure includes: a communication unit (11) configured to receive a registration permission message including at least one piece of information indicating that the procedure of first network slice-specific authentication and authorization is pending; and a control unit (12) configured to activate, upon the reception of the registration permission message, a timer for determining that the procedure of network slice-specific authentication and authorization is abnormal.

公开(公告)号：US20220248497A1

公开(公告)日：2022-08-04

申请号：US17629610

申请日：2020-12-18

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W76/34 ,  H04W12/08 ,  H04W12/06

Abstract: In response to revocation of authorization of a first network slice identifier for a User Equipment (UE) (1), an Access and Mobility Management Function (AMF) node (2) initiates a release procedure to release a PDU session associated with the first network slice identifier. This makes it possible, for example, to properly manage a Protocol Data Unit (PDU) session associated with a network slice when authorization for that network slice is revoked.

公开(公告)号：US20240340832A1

公开(公告)日：2024-10-10

申请号：US18294219

申请日：2022-05-13

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W60/00

CPC classification number: H04W60/00

Abstract: A first edge enabler server (EES) (5A) sends a control message to an edge configuration server (7) or an edge enabler client (EEC) (2) of a User Equipment (UE) indicating that the first EES is scheduled to be shut down or be unavailable. This can allow, for example, the edge configuration server or the EEC or both to perform any processing or procedure necessary to avoid or mitigate the effects of a planned shutdown of the EES.

公开(公告)号：US20240340643A1

公开(公告)日：2024-10-10

申请号：US18681550

申请日：2022-09-22

Applicant: NEC Corporation

Inventor： Tsuyoshi TAKAKURA ,  Toshiyuki Tamura

IPC: H04W12/06 ,  H04W48/18 ,  H04W60/04 ,  H04W84/06

CPC classification number: H04W12/06 ,  H04W48/18 ,  H04W60/04 ,  H04W84/06

Abstract: An apparatus, a method, and a program that contribute to clarifying a behavior of a network and a UE when the USS is not found in the UUAA-SM procedure are provided. An SMF receives from a UE a session establishment request message including an address of a USS and transmits to a UAS-NF an invocation message of an NEF authentication service including the address of the USS. The SMF receives from the UAS-NF a response message and transmit to the UE a reject response message to the session establishment request message when the response message includes a failure cause for the USS corresponding to the address of the USS. The reject response message includes information indicating a failure of a service related to USS corresponding to the address of the USS. This contributes to clarify the behavior of the SMF when the USS is not found in the UUAA-SM procedure.

公开(公告)号：US20240244033A1

公开(公告)日：2024-07-18

申请号：US18288672

申请日：2022-02-16

Applicant: NEC Corporation

Inventor： Tsuyoshi TAKAKURA ,  Toshiyuki TAMURA

IPC: H04L61/5076 ,  H04L61/5046

CPC classification number: H04L61/5076 ,  H04L61/5046

Abstract: A first server (5) receives from a requesting entity (2) a request for generating an Edge Enabler Client (EEC) Context. If the first server (5) determines access to an edge data network (EDN) (4) is permissible by verifying security credentials included in the request, it attempts to identify a second server (6) located in the EDN (4) based on a selection criterion. The selection criterion includes a requirement indicated in an AC Profile included in the request. If the access to the EDN (4) is not permissible or the requirement indicated in the AC Profile is not fulfilled, the first server (5) sends to the requesting entity (2) a second response message containing a failure cause, which is information indicating that the second server (6) cannot be identified. This can contribute, for example, to providing a suitable selection criterion for identifying an edge server.

公开(公告)号：US20220279430A1

公开(公告)日：2022-09-01

申请号：US17632988

申请日：2020-08-03

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W48/18 ,  H04W60/04 ,  H04W60/06 ,  H04W12/06

Abstract: It is intended to solve or at least reduce such a problem that a UE cannot know that a network is abnormal. A wireless terminal in an aspect of the present disclosure includes: a communication unit (11) configured to receive a registration permission message including at least one piece of information indicating that the procedure of first network slice-specific authentication and authorization is pending; and a control unit (12) configured to activate, upon the reception of the registration permission message, a timer for determining that the procedure of network slice-specific authentication and authorization is abnormal.

公开(公告)号：US20220256448A1

公开(公告)日：2022-08-11

申请号：US17628299

申请日：2020-12-18

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W48/18 ,  H04W12/06 ,  H04W48/02

Abstract: An AMF node (2) manages a UE context regarding a UE (1). The UE context includes a) a set of allowed network slice identifiers indicating one or more network slice identifiers currently allowed to the UE (1), and b) a set of pending network slice identifiers indicating one or more network slice identifiers for which a Network Slice-Specific Authentication and Authorization (NSSAA) procedure is pending. If the AMF (2) triggers initiation of a re-authentication and re-authorization procedure for a first network slice identifier currently allowed to the UE (1), it removes the first network slice identifier from the allowed set and store the same in the pending set. This, for example, allows the AMF to manage the UE context appropriately.

公开(公告)号：US20230337122A1

公开(公告)日：2023-10-19

申请号：US18027832

申请日：2021-07-09

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W48/18 ,  H04W60/04

CPC classification number: H04W48/18 ,  H04W60/04 ,  H04W84/042

Abstract: A core network node (3) stores a first association between a plurality of Home PLMN S-NSSAIs and a Serving PLMN S-NSSAI. The first association includes a second association between the Serving PLMN S-NSSAI and a Home PLMN S-NSSAI that is not subject to NSSAA, and a third association between the Serving PLMN S-NSSAI and another Home PLMN S-NSSAI subject to NSSAA. If a UE (1) does not support NSSAA feature and if a part of multiple Home PLMN S-NSSAIs presented by the UE (1) is included in the second association and the rest is included in the third association, the core network node sends information containing the second association to the UE (1). This can allow, for example, proper notification of information about a Mapped S-NSSAI available to a UE that does not support NSSAA.

公开(公告)号：US20230180120A1

公开(公告)日：2023-06-08

申请号：US18012120

申请日：2021-09-29

Applicant: NEC Corporation

Inventor： Toshiyuki TAMURA ,  Tsuyoshi TAKAKURA

IPC: H04W48/18 ,  H04W48/08 ,  H04W12/06

CPC classification number: H04W48/18 ,  H04W12/06 ,  H04W48/08 ,  H04W84/042

Abstract: A communication terminal (1) receives a first Single NSSAI (S-NSSAI) included in a configuration update command message, and stores the first S-NSSAI into Rejected NSSAI. In addition, the communication terminal (1) receives a second S-NSSAI included in an Extended rejected NSSAI information element. For example, this allows the communication terminal (1) to properly manage or update its NSSAI storage, when multiple Mapped S-NSSAIs are associated with a single Serving PLMN S-NSSAI and part or all of the multiple Mapped S-NSSAIs are subject to NSSAA.