Patents by Inventor Chi-Hsien Chen

Chi-Hsien Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11910488
    Abstract: A method of enhancing IP packet forwarding feature support after interworking is proposed. When a PDU session in 5GS is transferred to a PDN connection in EPS, the UE shall assume the feature is supported after inter-system change from 5GS to EPS. When a PDN connection is established in EPS, the network indicated that the feature is not supported, and the network provided 5GSM parameters for ESM/5GSM interworking for this PDN connection, then UE shall assume the feature is supported after inter-system change from EPS to 5GS, the UE shall also assume the feature is supported after inter-system change from 5GS back to EPS. The IP packet forwarding features include PS data off and local IP address in TFT.
    Type: Grant
    Filed: March 3, 2023
    Date of Patent: February 20, 2024
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen, Po-Ying Chuang, Po Kuang Lu
  • Publication number: 20240056900
    Abstract: A method for maintaining MBS session when UE performs intersystem change is provided. UE maintains a PDU session in 5G network. UE then joins an MBS session for receiving MBS service over the associated PDU session. Later on, UE performs intersystem change from 5G to 2/3/4G. The PDU session is then released or transferred to a PDN connection. From UE perspective, UE determines that the released or transferred PDU session is associated with the MBS session, and therefore locally leaves the MBS session. From NW perspective, NW determines that the released or transferred PDU session is associated with the MBS session, and therefore considers the UE is removed from the MBS session.
    Type: Application
    Filed: July 21, 2023
    Publication date: February 15, 2024
    Inventors: Yu-Hsin Lin, Yuan-Chieh Lin, Chi-Hsien Chen
  • Publication number: 20240057194
    Abstract: A method for handling a PDU session status IE for MBS when the PDU session status IE indicates that the PDU session is inactive is provided. A UE receives a service accept or a service reject message from the network, which comprises a PDU session status IE indicating that a PDU session is inactive. Accordingly, the UE locally releases the PDU session if the PDU session is active, and determines if the PDU session is associated with one or more MBS sessions. If so, the UE locally leaves the associated MBS sessions. The PDU session can be a single access PDU session or a multiple access PDU session.
    Type: Application
    Filed: July 21, 2023
    Publication date: February 15, 2024
    Inventors: Yu-Hsin Lin, Chi-Hsien Chen, Yuna-Chieh Lin
  • Publication number: 20240057217
    Abstract: A method for requesting to join an MBS session via a PDU session establishment procedure for existing PDU or MA PDU session is provided. A UE sends a PDU session establishment request message that includes a requested MBS container IE to request to join an MBS session. The request message initiates a PDU session establishment procedure, with a request type indicating that the PDU session establishment procedure is for an existing PDU session, or for an MA PDU session. A specific request type is used to indicate: 1)HANDOVER 5G PDU SESSION FROM NON-3GPP TO 3GPP; 2) TRANSFER 4G PDN CONNECTION (EPS) TO 5G; 3) TRANSFER 4G PDN CONNECTION (NON-3GPP) TO 5G; 4) ESTABLISH UP RESOURCE OVER 3GPP FOR 5G MA PDU; and 5) TRANSFER MA PDU (PDN LEG IN EPS) TO 5G MA PDU.
    Type: Application
    Filed: July 10, 2023
    Publication date: February 15, 2024
    Inventors: Yu-Hsin Lin, Chi-Hsien Chen, Yuan-Chieh Lin
  • Publication number: 20230328584
    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.
    Type: Application
    Filed: June 14, 2023
    Publication date: October 12, 2023
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen, Po-Kuang Lu, Yu-Chieh Tien
  • Publication number: 20230300677
    Abstract: A network (NW) includes a wireless communication circuit and an access traffic steering, switching and splitting (ATSSS) policy decision circuit. The wireless communication circuit receives parameters from a user equipment (UE), and transmits a network-decided ATSSS policy to the UE, wherein the parameters do not include performance of a 3rd generation partnership project (3GPP) access and performance of a non-3GPP access. The ATSSS policy decision circuit performs ATSSS rule selection for generating the network-decided ATSSS policy, wherein the ATSSS rule selection is assisted by at least a portion of the parameters provided by the UE.
    Type: Application
    Filed: February 2, 2023
    Publication date: September 21, 2023
    Applicant: MEDIATEK INC.
    Inventor: Chi-Hsien Chen
  • Publication number: 20230300635
    Abstract: A user equipment (UE) includes an access performance prediction circuit and a wireless communication circuit. The access performance prediction circuit predicts performance of a 3rd generation partnership project (3GPP ) access and performance of a non-3GPP access. The wireless communication circuit takes action in response to predicted performance of the 3GPP access and predicted performance of the non-3GPP access.
    Type: Application
    Filed: February 14, 2023
    Publication date: September 21, 2023
    Applicant: MEDIATEK INC.
    Inventor: Chi-Hsien Chen
  • Publication number: 20230300679
    Abstract: A user equipment (UE) includes an access performance acquisition circuit and a wireless communication circuit. The access performance acquisition circuit acquires performance of a 3rd generation partnership project (3GPP) access and performance of a non-3GPP access. The wireless communication circuit determines a non-network-decided access traffic steering, switching and splitting (ATSSS) policy according to the performance of the 3GPP access and the performance of the non-3GPP access.
    Type: Application
    Filed: February 1, 2023
    Publication date: September 21, 2023
    Applicant: MEDIATEK INC.
    Inventor: Chi-Hsien Chen
  • Publication number: 20230261500
    Abstract: A lithium battery charge-limiting apparatus includes a microcontroller, a current detector, and an electronic switch. The current detector detects a consumption current of an electronic apparatus having a lithium battery and informs the microcontroller of the consumption current, so that the microcontroller learns a plurality of the consumption currents. The microcontroller determines a first amount of a plurality of slopes of the consumption currents. If a second amount in the first amount of the slopes of the consumption currents are between a first minus number and zero, and if a next slope of the slopes of the second amount of the consumption currents is greater than a present slope of the slopes of the second amount of the consumption currents, the microcontroller turns off the electronic switch to stop transmitting a charging voltage to the electronic apparatus.
    Type: Application
    Filed: February 17, 2022
    Publication date: August 17, 2023
    Inventors: Hui-Te HSU, Chi-Hsien CHEN, Shih-Wei TAI
  • Publication number: 20230224979
    Abstract: A method for handling the joining and leaving an MBS session via a PDU session establishment or modification procedure is provided. Upon receipt of a back-off timer in the Received MBS Container IE (with the operation/decision “MBS join is rejected” or “Remove UE from the MBS session”), the UE shall associate the MBS back-off timer with the MBS session ID (e.g., TMGI). If the timer value is neither zero nor deactivated, the UE should not request to join the MBS session with the same MBS session ID before the timer expiry. If the timer value is deactivated, the UE should not request to join the MBS session with the same MBS session ID until the UE is switched off, the USIM is removed, an entry in the “list of subscriber data” for the current SNPN is updated, or an event/notification is triggered by the network.
    Type: Application
    Filed: December 23, 2022
    Publication date: July 13, 2023
    Inventors: CHIEN-CHUN HUANG-FU, Chi-Hsien Chen
  • Publication number: 20230217321
    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.
    Type: Application
    Filed: December 13, 2022
    Publication date: July 6, 2023
    Inventors: YUAN-CHIEH LIN, Chi-Hsien Chen
  • Patent number: 11696170
    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.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: July 4, 2023
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen, Po-Kuang Lu, Yu-Chieh Tien
  • Publication number: 20230209654
    Abstract: A method of enhancing IP packet forwarding feature support after interworking is proposed. When a PDU session in 5GS is transferred to a PDN connection in EPS, the UE shall assume the feature is supported after inter-system change from 5GS to EPS. When a PDN connection is established in EPS, the network indicated that the feature is not supported, and the network provided 5GSM parameters for ESM/5GSM interworking for this PDN connection, then UE shall assume the feature is supported after inter-system change from EPS to 5GS, the UE shall also assume the feature is supported after inter-system change from 5GS back to EPS. The IP packet forwarding features include PS data off and local IP address in TFT.
    Type: Application
    Filed: March 3, 2023
    Publication date: June 29, 2023
    Inventors: CHIEN-CHUN HUANG-FU, Chi-Hsien Chen, Po-Ying Chuang, Po Kuang Lu
  • Publication number: 20230135662
    Abstract: A method of applying power-saving feature assistance information for emergency PDU session or PDN connection for emergency bearer service associated with 3GPP access is provided. In 5GS, when an emergency PDU session (associated with 3GPP access) is successfully established after the UE received the Negotiated PEIPS assistance information IE during the last registration procedure, the UE does not use the PEIPS assistance information until the emergency PDU session is successfully moved out of 5GS 3GPP access. In EPS, when an PDN connection for emergency bearer service is successfully established after the UE received the Negotiated WUS assistance information IE during the last registration (Attach/TAU) procedure, the UE does not use the WUS assistance information until the PDN connection for emergency bearer service is successfully moved out of EPS.
    Type: Application
    Filed: October 10, 2022
    Publication date: May 4, 2023
    Inventors: Yuan-Chieh Lin, Chi-Hsien Chen
  • Publication number: 20230133792
    Abstract: A method for handling a collision of a UE-requested PDU session establishment procedure and a network-requested PDU session modification procedure is proposed. When a PDU SESSION ESTABLISHMENT REQUEST message indicates that the UE-requested PDU session establishment request procedure is to handover an existing PDU session between 5G 3GPP access and 5G non-3GPP access, UE and NW proceed with the UE-requested PDU session establishment procedure and abort the NW-requested PDU session modification procedure. When a PDU SESSION ESTABLISHMENT REQUEST message indicates that the UE-requested PDU session establishment request procedure is to establish user plane resources for an MA PDU session, UE and NW proceed with both the UE-requested PDU session establishment procedure and the NW-requested PDU session modification procedure.
    Type: Application
    Filed: October 19, 2022
    Publication date: May 4, 2023
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen, Yuan-Chieh Lin
  • Patent number: 11622415
    Abstract: A method of enhancing IP packet forwarding feature support after interworking is proposed. When a PDU session in 5GS is transferred to a PDN connection in EPS, the UE shall assume the feature is supported after inter-system change from 5GS to EPS. When a PDN connection is established in EPS, the network indicated that the feature is not supported, and the network provided 5GSM parameters for ESM/5GSM interworking for this PDN connection, then UE shall assume the feature is supported after inter-system change from EPS to 5GS, the UE shall also assume the feature is supported after inter-system change from 5GS back to EPS. The IP packet forwarding features include PS data off and local IP address in TFT.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: April 4, 2023
    Assignee: MediaTek INC.
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen, Po-Ying Chuang, Po Kuang Lu
  • Patent number: 11582656
    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.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: February 14, 2023
    Assignee: MediaTek INC.
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen
  • Publication number: 20220369393
    Abstract: A method for handling a collision of a UE-requested PDU session establishment procedure and a network-requested PDU session release procedure is proposed. When a PDU SESSION ESTABLISHMENT REQUEST message indicates that the UE-requested PDU session establishment request procedure is to handover an existing PDU session between 5G 3GPP access and 5G non-3GPP access, the UE proceeds with the network-requested PDU session release procedure and aborts the UE-requested PDU session establishment procedure. Otherwise, the UE ignores a received PDU SESSION RELEASE COMMAND message and proceeds with the UE-requested PDU session establishment procedure.
    Type: Application
    Filed: April 12, 2022
    Publication date: November 17, 2022
    Inventors: Chien-Chun Huang-Fu, Chi-Hsien Chen
  • Publication number: 20220353951
    Abstract: A method for handling a collision of a UE-requested MA PDU session release procedure and a network-requested MA PDU session release procedure is proposed. If the Access type IE is included in the PDU SESSION RELEASE COMMAND message, and the PDU session is an MA PDU session and having user-plane resources established on the access different from the access indicated in the Access type IE in the PDU SESSION RELEASE COMMAND message, then the UE proceeds with both the UE-requested PDU session release procedure and network-requested PDU session release procedure. Otherwise, the UE aborts the UE-requested PDU session release procedure and stops the timer T3582 and proceeds with the network-requested PDU session release procedure.
    Type: Application
    Filed: March 28, 2022
    Publication date: November 3, 2022
    Inventors: Yuan-Chieh Lin, Chi-Hsien Chen
  • Publication number: 20220353937
    Abstract: A method for handling a collision of a UE-requested MA PDU session establishment procedure and a network-requested MA PDU session release procedure is proposed. If the UE-requested PDU session establishment procedure is to establish user plane resources on a second access type for an MA PDU session on a first access and the Access type IE is not included in the PDU SESSION RELEASE COMMAND or the Access type IE included in the PDU SESSION RELEASE COMMAND indicates the first access, then the UE proceeds with the network-requested PDU session release procedure for releasing the MA PDU session, and aborts the UE-requested PDU session establishment procedure.
    Type: Application
    Filed: March 28, 2022
    Publication date: November 3, 2022
    Inventors: Yuan-Chieh Lin, Chi-Hsien Chen