公开(公告)号：US20230217508A1

公开(公告)日：2023-07-06

申请号：US18079506

申请日：2022-12-12

Applicant: MEDIATEK INC.

Inventor： YUAN-CHIEH LIN

IPC: H04W76/10 ,  H04W60/02 ,  H04W76/30

CPC classification number: H04W76/10 ,  H04W60/02 ,  H04W76/30

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session establishment procedure for adding a 3GPP PDN leg to an MA PDU session already established with a non-3GPP leg is proposed. In one novel aspect, for a 5GS MA PDU session already established on non-3GPP access, upon receipt of an ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message for establishing a PDN connection as a user-plane resource for the MA PDU session over 3GPP access, the UE sends an ACTIVATE DEFAULT EPS BEARER CONTEXT REJECT message if any value of at least one of the critical parameters, including the PDN type, ESM cause, PDN address, S-NSSAI, SSC mode (set to SSC mode 1), and APN IEs in the ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message does not match/sync/compatible to the corresponding stored value of the MA PDU session with a non-3GPP leg.

公开(公告)号：US20230354179A1

公开(公告)日：2023-11-02

申请号：US18133701

申请日：2023-04-12

Applicant: MEDIATEK INC.

Inventor： YUAN-CHIEH LIN ,  Chia-Lin Lai

IPC: H04W48/18 ,  H04W60/04

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

Abstract: A method of enhanced manual network selection procedure for access localized services in PNI-NPN is proposed. For manual CAG/PNI-NPN selection as hosting network, if a CAG cell in a PLMN broadcasting a CAG-ID is available and included in the (Allowed) CAG-ID list of the UE-stored CAG related configuration of the PLMN, the user may manually select the CAG cell as a suitable cell. However, the CAG-ID that is associated with validity information, and the corresponding validity criteria may or may not be satisfied, e.g., due to the UE-stored CAG related configuration is different from the NW-maintained CAG related configuration. Therefore, the UE does not know whether the CAG cell is suitable. In response, the UE triggers a registration procedure for mobility and periodic registration update, and obtains the updated CAG related configuration.

公开(公告)号：US20230354167A1

公开(公告)日：2023-11-02

申请号：US18129058

申请日：2023-03-30

Applicant: MEDIATEK INC.

Inventor： YUAN-CHIEH LIN ,  Chia-Lin Lai

IPC: H04W48/16 ,  H04W48/20 ,  H04W76/30

CPC classification number: H04W48/16 ,  H04W48/20 ,  H04W76/30

Abstract: A method of handling updated CAG related configuration is proposed. UE receives an updated CAG related configuration in a DL NAS message via a CAG cell, which broadcasts a list of supported CAG-IDs of the current network. UE may also receive an updated CAG related configuration in a DL NAS message via a non-CAG cell of the current network. The UE examines the list of allowed CAG-IDs in the updated CAG related configuration, determines whether they are supported by the CAG cell, whether they are associated with validity information, whether the validity criteria are met, whether the UE is ONLY allowed to access 5GS via CAG cells, and whether the UE has any emergency PDU session. Depending on the determination, the UE then either enters LIMITED-SERVICE and search for suitable cell in the current network, or enters PLMN-SEARCH state and applies PLMN selection process.

公开(公告)号：US20230262653A1

公开(公告)日：2023-08-17

申请号：US18088322

申请日：2022-12-23

Applicant: MEDIATEK INC.

Inventor： YUAN-CHIEH LIN

IPC: H04W68/02 ,  H04W60/00

CPC classification number: H04W68/02 ,  H04W60/00

Abstract: A method of handling lower layer failure when assigning a Paging Early Indication with Paging Subgrouping (PEIPS) subgroup ID is proposed. If a network supports and accepts the use of PEIPS assistance information for a UE, the network can provide to the UE the negotiated PEIPS assistance information containing a new Paging subgroup ID and a new 5G-GUTI in a REGISTRATION ACCEPT message or in a CONFIGURATION UPDATE COMMAND message, and the UE was assigned with an old paging subgroup ID. When lower layer failure occurs, the network may not successfully receive a REGISTRATION COMPLETE message or a CONFIGURATION UPDATE COMPLETE message from the UE. Accordingly, the network needs to use both possible paging subgroup IDs for the UE until one of the paging subgroup IDs is considered invalid.

公开(公告)号：US20230217321A1

公开(公告)日：2023-07-06

申请号：US18080019

申请日：2022-12-13

Applicant: MEDIATEK INC.

Inventor： YUAN-CHIEH LIN ,  Chi-Hsien Chen

IPC: H04W36/00 ,  H04L69/08 ,  H04W76/22

CPC classification number: H04W36/0022 ,  H04L69/08 ,  H04W76/22

Abstract: A method of handling interworking from 5G system (5GS) to 2/3G for an PDU session with a 3GPP EPS PDN leg is proposed. Upon intersystem change from S1 mode to A/Gb mode or Iu mode, for a PDN connection which was established as a user plane resource of an MA PDU session: if the SM activates a PDP context using parameters from the default EPS bearer context of the PDN connection, then the SMF can initiate a network-requested PDU session release procedure over non-3GPP access or perform a local release of the MA PDU session; the UE can perform a local release of the MA PDU session. Otherwise, the SMF can initiate a network-requested PDU session modification procedure over 5G non-3GPP access to move traffic of the MA PDU session to 5G non-3GPP access, or initiate a network-requested PDU session release procedure over non-3GPP access.