Patents by Inventor Chih-Shi Yee

Chih-Shi Yee 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).

  • Publication number: 20210345404
    Abstract: An apparatus (e.g., an access point (AP)) announces to one or more stations (STAs), in a frame, one or more preamble detection (PD) channels in a frequency segment such that each of the one or more STAs monitors a respective one of the one or more PD channels to detect any transmission on the one or more PD channels. The apparatus then wirelessly communicates with at least one of the one or more STAs on one of the one or more PD channels during a transmission opportunity (TXOP).
    Type: Application
    Filed: April 27, 2021
    Publication date: November 4, 2021
    Inventors: Kai Ying Lu, Yongho Seok, Chao-Chun Wang, Jianhan Liu, James Chih-Shi Yee, Thomas Edward Pare, JR.
  • Publication number: 20210337613
    Abstract: A plurality of different medium access control (MAC) addresses are assigned to a plurality of virtual access point (AP) multi-link devices (MLDs) that are implemented within a physical AP MLD such that each of the plurality of virtual AP MLDs is assigned a respective MAC address of the plurality of different MAC addresses. Wireless communications are then established with one or more stations (STAs) over a plurality of links.
    Type: Application
    Filed: April 20, 2021
    Publication date: October 28, 2021
    Inventors: Yongho Seok, Kai Ying Lu, Gabor Bajko, James Chih-Shi Yee
  • Patent number: 11159207
    Abstract: Null Data Packet Sounding for preamble punctured Physical Layer Convergence Procedure Protocol Data Unit (PPDU) for efficient use of a wireless channel bandwidth where a primary service co-exists.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: October 26, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, Chao-Chun Wang, James Chih-Shi Yee
  • Patent number: 11153921
    Abstract: Embodiments of the present invention provide a method and apparatus for simultaneous transmission and reception of data wirelessly using different wireless bands. The multi-link operations described herein can provide higher network throughput and improved network flexibility compared to traditional techniques to wireless communication. Link management operations such as enabling and disabling of a link may be performed by an AP or STA by sending a frame over a link that is currently active. Moreover, an AP may request a switch to a different link available on the AP side for MLO, for example, when a link is occupied by interference and is not available when AP needs to use the link, and the operating parameters of a target link can be updated.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: October 19, 2021
    Inventors: Chien-Fang Hsu, Yongho Seok, James Chih-Shi Yee
  • Publication number: 20210321458
    Abstract: System and method of using an AP to individually controlling RTS/CTS duration thresholds for multiple STAs in a WLAN. In response to a STA's association request, the AP determines a duration threshold specific to the STA and encloses this information in an association request response for transmission to the STA. By using a broadcast frame, the AP may instruct multiple STAs to uniformly update their stored duration thresholds. For example, if the duration threshold field in the beacon frame is set to 0, the multiple STAs preserve their current duration thresholds; if the field is set to a non-zero value less than 1023, the multiple STAs all update their duration thresholds to the non-zero value; if this field is set to 1023, the multiple STAs disable the RTS/CTS transmissions. Based on a current threshold and pertinent policies, an STA can decide whether to initiate an RTS/CTS transmission sequence.
    Type: Application
    Filed: June 23, 2021
    Publication date: October 14, 2021
    Inventors: Yongho SEOK, Chao-Chun Wang, James Chih-Shi YEE
  • Publication number: 20210315025
    Abstract: Embodiments of the present invention a computer-implemented process for automatically synchronizing TXOPs for a multi-link device (MLD) to improve wireless network performance and prevent IDC is depicted according to embodiments of the present invention. The process can be performed by a multi-link device performing a multi-link operation, and the multi-link device can act as a wireless access point or a wireless station. The MLD includes a first wireless station (STA) associated with a first wireless link and a second wireless STA associated with a second wireless link. The MLD can include more wireless STAs for communicating over different wireless links.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 7, 2021
    Inventors: Yongho Seok, Weisung Tsao, James Chih-Shi Yee, Po-Yuen Cheng
  • Publication number: 20210315010
    Abstract: A shared wireless fidelity (WiFi) communication device receives a first frame transmitted from a sharing access point (AP), and transmits a second frame to a non-AP station (STA). The first frame at least contains information of a shared period that is allowed to be used by the shared WiFi communication device, and the shared period is a subset of a time period of transmission opportunity (TXOP) obtained by the sharing AP. The second frame at least contains the information of the shared period.
    Type: Application
    Filed: March 26, 2021
    Publication date: October 7, 2021
    Inventors: Chien-Fang Hsu, James Chih-Shi Yee
  • Publication number: 20210314292
    Abstract: Embodiments of the present invention are drawn to electronic systems capable of transmitting a group addressed frame that identifies an MLD according to an MLD MAC address. The group addressed frame can include an ARP request, for example, and can be transmitted by an AP MLD responsive to an individually addressed frame transmitted by a non-AP STA MLD associated with the AP MLD. The AP MLD can provide a proxy ARP service for associated non-AP STA MLDs.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 7, 2021
    Inventors: Yongho Seok, Kai Ying Lu, James Chih-Shi Yee
  • Publication number: 20210314879
    Abstract: Embodiments of the present invention are drawn to methods and electronic devices capable of performing coordinate spatial reuse for wirelessly transmitting data on a channel in coordination with another wireless AP operating an overlapping BSS using the same wireless channel. The device can perform RSSI measurements and generate Per-RU RSSI reports including the RSSI measurements information for transmission to another wireless AP. The RSSI measurement can be performed by the device based on power levels detected when receiving TB PPDUs transmitted by wireless STAs responsive to trigger frames, for example. Based on the Per-RU RSSI report, a wireless AP can be configured to transmit data to an associated wireless STA without causing significant interference when another AP of the overlapping BSS is also transmitting, and can schedule frames for transmission from associated wireless STAs accordingly.
    Type: Application
    Filed: March 30, 2021
    Publication date: October 7, 2021
    Inventors: Yongho Seok, Gary A. Anwyl, Jianhan Liu, Kai Ying Lu, James Chih-Shi Yee, Thomas Edward Pare, JR., James June-Ming Wang
  • Patent number: 11134518
    Abstract: A cooperative multi-band wireless station architecture that enables full duplex operations of wireless stations (STAs). Such an STA includes a WIFI transceiver and one or more additional transceivers. The two transceivers (and the associated channels) operate in mutually exclusive WIFI bands or different types of protocols and therefore can transmit and/or receive simultaneously without signal interference to each other. The multiple transceivers can perform independent clear channel assessment (CCA) and then simultaneously perform signal transmission or reception jointly or independently. In a cooperative multi-band operation, one channel may be used as an independent assistant channel and responsible for supplying assistant information relevant to a transmission opportunity (TXOP) for the other channel (primary channel) to take corresponding actions.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: September 28, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jianhan Liu, Yongho Seok, Chao-Chun Wang, James June-Ming Wang, James Chih-Shi Yee, Thomas Edward Pare, Jr., Yungping Hsu
  • Patent number: 11108439
    Abstract: Embodiments of the present invention provide an apparatus and method for a MAP wireless network that includes a collaborative channel sounding measurement phase to determine channel state information between devices (e.g., the channel state between an STA and a collaborative AP) for efficient configuration of the MAP wireless network and to improve the performance of the MAP wireless networks. The wireless AP and wireless STAs associated with the collaborative APs can simultaneously transmit by applying collaborative beamforming where the interferences between channels nullify each other (e.g., nulling), and the beamforming is performed based on a sounding phase performed by the collaborative APs. The sounding protocol can include a collaborative sounding measurement phase and a collaborative sounding feedback report phase, using Null Data Packets (NDPs), for example, as described herein according to embodiments of the present invention.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: August 31, 2021
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, Thomas Edward Pare, Jr.
  • Publication number: 20210266960
    Abstract: A device detects a primary channel busy for an operating bandwidth having a plurality of channel segments comprising the primary channel and at least one non-primary channel. In response to detecting the primary channel busy, the device obtains a transmission opportunity (TXOP) through a first non-primary channel of the at least one non-primary channel. Then, the device performs a transmission at least on the first non-primary channel during the TXOP.
    Type: Application
    Filed: February 3, 2021
    Publication date: August 26, 2021
    Inventors: Kai Ying Lu, Jianhan Liu, Chao-Chun Wang, Yongho Seok, Thomas Edward Pare, JR., James Chih-Shi Yee
  • Publication number: 20210266964
    Abstract: A device obtains a transmission opportunity (TXOP) in a wideband operating bandwidth comprising a primary channel and a plurality of non-primary channels. The device initiates a frame exchange to reserve the TXOP for TXOP sharing. The device also performs a data transmission within the TXOP on one or more of the plurality of non-primary channels. The device then shares the primary channel with a basic service set (BSS) after the frame exchange.
    Type: Application
    Filed: February 3, 2021
    Publication date: August 26, 2021
    Inventors: Kai Ying Lu, Yongho Seok, Chao-Chun Wang, James Chih-Shi Yee
  • Patent number: 11095729
    Abstract: A management device accepts a first communications device to join a wireless communications network managed by the management device. The management device registers a service provided by the first communications device. The service is available in accordance with a set of service parameters. The set of service parameters include a schedule of availability. The set of service parameters include at least one parameter selected from the group consisting of a set of one or more starting times, a set of one or more service intervals, a set of one or more service periods, a set of one or more physical media, a set of one or more device identifiers, a set of one or more data sequence identifiers, and at least one medium access mode within the service interval.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: August 17, 2021
    Assignee: MediaTek Inc.
    Inventors: Kaiying Lu, Chao-Chun Wang, James Chih-shi Yee, Chien-Fang Hsu, Yu-Che Tsai
  • Publication number: 20210250963
    Abstract: Multi-link operations can provide higher network throughput and improved network flexibility compared to traditional techniques for wireless communication. Embodiments of the present invention provide a method of frame transmission that prevents constrained MLDs from transmitting and receiving frames on multiple links simultaneously using a novel and reliable group addressed frame transmission schedule for constrained MLDs. Group addressed frames are frames that are transmitted to several devices (e.g., broadcast) listening on a wireless link. It is important to carefully schedule group addressed frames for reception by MLDs to prevent IDC interference. According to some embodiments, group addressed frames are only transmitted when all MLDs listening on a wireless link are not transmitting data to prevent IDC interference.
    Type: Application
    Filed: February 3, 2021
    Publication date: August 12, 2021
    Inventors: Yongho SEOK, Kai Ying LU, James Chih-Shi YEE
  • Publication number: 20210250848
    Abstract: Embodiments of the present invention provide apparatus and methods for announcing a BSS parameter updates for a wireless link that can be received by a MLD even when the MLD is not listening for parameter updates on that specific link by employing a different wireless link to broadcast, receive, and/or signal the BSS parameter update. An MLD can update the BSS parameters of the wireless link and use the wireless link according to the updated BSS parameters (e.g., after performing a channel switch). According to some embodiments, an STA within an AP MLD transmits an information elements (IE) including BSS parameter updates associated with a different STA (operating on a different wireless link) within the AP MLD.
    Type: Application
    Filed: February 3, 2021
    Publication date: August 12, 2021
    Inventors: Yongho SEOK, Kai Ying LU, James Chih-Shi YEE
  • Publication number: 20210243693
    Abstract: Systems and methods of transmitting a multi-user (MU) wake-up packet in FDMA. In the wake-up setup stage, an STA informs the AP that it can resolve an MU wake-up packet transmitted in FDMA. Accordingly, AP allocates a frequency channel to the STA in a WUR setup response frame which indicates a channel offset relative to the primary channel. Moreover, if a WUR channel allocated to an STA is inaccessible or there is on pending wake-up signal for the STA, no wake-up signal is included in the MU wake-up packet while any other accessible allocated channels may still be utilized for transmitting the scheduled wake-up signals. During such a transmission, an inaccessible channel may be punctured; and an accessible channel having no pending wake-up signal may be used to carry an invalid wake-up signal or a legacy preamble followed with no wake-up signal.
    Type: Application
    Filed: April 22, 2021
    Publication date: August 5, 2021
    Inventors: Yongho SEOK, Jianhan Liu, James Chih-Shi YEE, Thomas Edward PARE, JR.
  • Patent number: 11076425
    Abstract: System and method of using an AP to individually controlling RTS/CTS duration thresholds for multiple STAs in a WLAN. In response to a STA's association request, the AP determines a duration threshold specific to the STA and encloses this information in an association response for transmission to the STA. By using a broadcast frame, the AP may instruct multiple STAs to uniformly update their stored duration thresholds. For example, if the duration threshold field in the beacon frame is set to 0, the multiple STAs preserve their current duration thresholds; if the field is set to a non-zero value less than 1023, the multiple STAs all update their duration thresholds to the non-zero value; if this field is set to 1023, the multiple STAs disable the RTS/CTS transmissions based on the duration threshold. Based on a current threshold and pertinent policies, an STA can decide whether to initiate an RTS/CTS transmission sequence.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: July 27, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Chao-Chun Wang, James Chih-Shi Yee
  • Publication number: 20210212118
    Abstract: A multi-link device (MLD) monitors each of first and second links in a multi-link operation in wireless communications, with the first link being a primary link and the second link being a secondary link. The MLD obtains a transmission opportunity (TXOP) on one of the first link and the second link as a result of performing a contention-based channel access on the first link and the second link. The MLD checks channel status of the other of the first link and the second link. The MLD then transmits one or more frames on the first link but not on the second link, on the second link but not on the first link, or on both the first link and the second link synchronously, responsive to the channel status of the other link given the TXOP being obtained on the one of the first link and the second link.
    Type: Application
    Filed: December 25, 2020
    Publication date: July 8, 2021
    Inventors: Kai Ying Lu, Yongho Seok, Weisung Tsao, James Chih-Shi Yee
  • Publication number: 20210211931
    Abstract: Embodiments of the present invention transmit fragmented frames using a sequence control field in a MAC header that includes an extended 15-bit sequence number for tracking the order of frames, and a 1-bit PF field that indicates the position of a fragmented frame in conjunction with a 1-bit MF field carried in a frame control subfield of the MAC header. The fragmented frames can be received by a wireless device and defragmented according to the MF field, the PF field, and the sequence control number. The frames can be discarded if any are not received successfully.
    Type: Application
    Filed: December 29, 2020
    Publication date: July 8, 2021
    Inventors: Yongho SEOK, Kai Ying LU, James Chih-Shi YEE