公开(公告)号：US20220078679A1

公开(公告)日：2022-03-10

申请号：US17529095

申请日：2021-11-17

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04W36/00 ,  H04W76/10

Abstract: A method of handling invalid PDU session during handover procedure between non-3GPP access and 3GPP access in a mobile communication network is proposed. A UE establishes a PDU session over a first RAT, and then tries to handover the PDU session from the first RAT to a second RAT. However, at the network side, the PDU session over the first RAT does not exist anymore and the network considers the PDU session to be invalid. The network thus sends a PDU session establishment reject message back to the UE, with a 5GSM status message cause value #54 indicating “PDU session does not exist”. At the UE side, the PDU session over the first RAT is still valid (e.g., not inactive). In order to resynchronize with the network, the UE performs a PDU session release procedure to release the PDU session over the first RAT.

公开(公告)号：US11265771B2

公开(公告)日：2022-03-01

申请号：US16926879

申请日：2020-07-13

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Tsung-Huan Cheng ,  Yu-Hsin Lin ,  Chi-Hsien Chen

IPC: H04W36/00 ,  H04W88/02 ,  H04W84/04

Abstract: A method of defining ATtention (AT) commands for supporting Service and Session Continuity (SSC) mode 2 and SSC mode 3 of 5G Protocol Data Unit (PDU) session operations is proposed. The AT command can be a notification of an unsolicited result code +CGEV: NW PDN DEACT, +CGEV: NW MODIFY, or +CGEV: ME PDN ACT, or a configuration command +CGDCONT with additional 5G parameters. Additional 5G parameters include an SSC, an old CID, a change reason and a PDU lifetime for the purpose of communicating information regarding the request of PDU session anchor relocation.

公开(公告)号：US11206602B2

公开(公告)日：2021-12-21

申请号：US16861624

申请日：2020-04-29

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W72/00 ,  H04W48/02 ,  H04W8/08 ,  H04W84/04

Abstract: Aspects of the disclosure provide methods and an apparatus for enhancement of closed access groups (CAGs). For example, the apparatus can include a non-volatile memory, receiving circuitry, transmitting circuitry and processing circuitry. The receiving circuitry can be configured to receive a configuration update command message and a registration accept message, each of which includes a CAG information list IE containing a CAG information list. The transmitting circuitry can be configured to transmit a configuration update complete message and a registration request message. The processing circuitry can be configured to store the CAG information list of the CAG information list IE in the non-volatile memory, and select a public land mobile network based on the CAG information list stored in the non-volatile memory.

公开(公告)号：US11206597B2

公开(公告)日：2021-12-21

申请号：US16867769

申请日：2020-05-06

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu

IPC: H04W4/00 ,  H04W40/12 ,  H04W80/10 ,  H04W48/18

Abstract: Aspects of the disclosure provide apparatuses and methods for wireless communications. One apparatus includes processing circuitry that selects a non-default and unevaluated URSP rule as an evaluating URSP rule. The URSP rule includes a traffic descriptor matching an application triggered by the apparatus. The processing circuitry selects a first unevaluated RSD of the evaluating URSP rule as an evaluating RSD, and determines whether the evaluating RSD includes at least one of a non-supported PDU session type, a non-supported SSC mode, and a non-supported S-NSSAI. When the evaluating RSD is determined to include at least one of the non-supported PDU session type, the non-supported SSC mode, and the non-supported S-NSSAI, the processing circuitry determines whether the evaluating URSP rule includes a second unevaluated RSD. The processing circuitry selects the second unevaluated RSD as the evaluating RSD when the evaluating URSP rule is determined to include the second unevaluated RSD.

公开(公告)号：US11115896B2

公开(公告)日：2021-09-07

申请号：US16829239

申请日：2020-03-25

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen

IPC: H04W40/12 ,  H04W28/24 ,  H04W80/02 ,  H04W84/04 ,  H04W28/02

Abstract: A method of enhanced error handling for 5G QoS operations associated with a PDU session is proposed. A QoS operation can be received via a PDU session modification procedure. In one example, the QoS operation is to create a new QoS rule for a PDU session, however, there is an existing QoS rule having the same QoS rule ID (QRI). The UE detects whether the QoS operation will causing the PDU session have no default QoS rule or have more than one default QoS rules. If the existing QoS rule is a default QoS rule, or if the new QoS rule have a default QoS rule (DQR) indication bit set to be true, then the UE rejects the QoS operation and indicates a QoS operation error to the network.

公开(公告)号：US20210250409A1

公开(公告)日：2021-08-12

申请号：US17141962

申请日：2021-01-05

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu

IPC: H04L29/08 ,  H04W76/10 ,  H04W60/00

Abstract: A method of handling multi-access (MA) Protocol data unit (PDU) session upgrade is proposed. An MA PDU session. uses one 3GPP access network or one non-3GPP access network at a time, or simultaneously one 3GPP access network and one non-3GPP access network. A UE may be served by a network slice if a corresponding Single Network Slice Selection Assistance Information (S-NSSAI) is included in the allowed NSSAI per Radio Access Technology (RAT) access type. In accordance with one novel aspect, a UE performs additional check on whether the S-NSSAI associated with an MA PDU session is included in the allowed NSSAI for both 3GPP and non-3GPP access types before the UE sending out a PDU session establishment request or a PDU session modification request of the MA PDU session.

公开(公告)号：US20210243664A1

公开(公告)日：2021-08-05

申请号：US17236974

申请日：2021-04-21

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Meng-Ting Tsai

IPC: H04W36/14 ,  H04W76/20 ,  H04W76/11 ,  H04W8/18

Abstract: A method for UE route selection policy (URSP) rule matching is proposed. URSP is used by a UE to determine if a detected application can be associated to an established PDU session, can be offload to non-3GPP access outside a PDU session, or can trigger the establishment of a new PDU session. The UE first finds a non-default URSP rule with a matching traffic descriptor to the application. When the UE fails to find existing PDU session or setup new PDU session with any or the route selection descriptors of the non-default URSP rule, the UE moves to another non-default URSP rule, if any, and try the matching. If all non-default URSP rules cannot be matched with the application, then the UE tries the default URSP rule, which includes a match-all traffic descriptor.

公开(公告)号：US11026127B2

公开(公告)日：2021-06-01

申请号：US16274847

申请日：2019-02-13

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Yuan-Chieh Lin

IPC: H04W36/00 ,  H04W36/14 ,  H04W76/12 ,  H04W76/32 ,  H04W84/04

Abstract: Aspects of the disclosure provide an electronic apparatus and methods for wireless communication. The electronic apparatus can include processing circuitry configured to identify, during an inter-system change of the electronic apparatus from a source network system to a target network system, at least one source session bearer between the electronic apparatus and the source network system. The processing circuitry can further map the at least one identified source session bearer to at least one target session bearer based on a mapping relationship that matches the at least one identified source session bearer with the at least one target session bearer to be established between the electronic apparatus and the target network system.

公开(公告)号：US20210051515A1

公开(公告)日：2021-02-18

申请号：US16937393

申请日：2020-07-23

Applicant: MediaTek Inc.

Inventor： Chien-Chun Huang-Fu ,  Chi-Hsien Chen ,  Po-Kuang Lu ,  Yu-Chieh Tien

IPC: H04W28/02 ,  H04W36/14

Abstract: Various solutions for single network slice selection assistance information (S-NSSAI) based congestion control with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a message with a back-off timer from the network node. The apparatus may determine whether an S-NSSAI of a protocol data unit (PDU) session is provided by the network node. The apparatus may start the back-off timer and associate the back-off timer with the S-NSSAI of the PDU session in an event that the S-NSSAI is provided by the network node.

公开(公告)号：US20200351755A1

公开(公告)日：2020-11-05

申请号：US16861624

申请日：2020-04-29

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Marko Niemi

IPC: H04W48/02 ,  H04W8/08

Abstract: Aspects of the disclosure provide methods and an apparatus for enhancement of closed access groups (CAGs). For example, the apparatus can include a non-volatile memory, receiving circuitry, transmitting circuitry and processing circuitry. The receiving circuitry can be configured to receive a configuration update command message and a registration accept message, each of which includes a CAG information list IE containing a CAG information list. The transmitting circuitry can be configured to transmit a configuration update complete message and a registration request message. The processing circuitry can be configured to store the CAG information list of the CAG information list IE in the non-volatile memory, and select a public land mobile network based on the CAG information list stored in the non-volatile memory.