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).

  • Enhanced high-throughput multi-link channel access and operation
    Patent number: 11516841
    Abstract: An apparatus (e.g., an access point (AP) establishes a plurality of links comprising a primary link and at least a secondary link. The apparatus transmits a management frame on the primary link to indicate a multi-link capability of the AP. The apparatus configures the secondary link for one or more non-AP stations (STAs), which are capable of operating on the primary link and the secondary link, with multi-link capability and operating parameters through an association procedure on the primary link.
    Type: Grant
    Filed: September 2, 2020
    Date of Patent: November 29, 2022
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Kaiying Lu, Yongho Seok, James Chih-Shi Yee, Chao-Chun Wang, Jianhan Liu, Thomas Edward Pare, Jr.
  • Secondary channel spatial reuse in a wireless network
    Patent number: 11503638
    Abstract: A data unit (e.g., a physical layer convergence procedure (PLCP) protocol data unit (PPDU)) is detected at a first wireless device of a basic service set (BSS). The data unit was sent on a channel from a second wireless device of an overlapping basic service set (OBSS). The data unit is wide-bandwidth, occupying both a primary channel and a secondary channel of the wireless network. The first and second wireless devices are within a same spatial reuse group (SRG). The first wireless device stores the channel bandwidth of the data unit and a receive duration time of the data unit. During the receive duration time of the data unit, a SRG OBSS power density threshold is applied on the secondary channels that are within the channel bandwidth of the data unit, instead of applying a non-SRG OBSS power density threshold on those secondary channels.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: November 15, 2022
    Assignee: MEDIATEK SINGAPORE PTE LTD.
    Inventors: Yongho Seok, James June-Ming Wang, Chao-Chun Wang, Chih-Shi Yee
  • PRIORITY SERVICE ACCESS USING EDCA CHANNEL ACCESS TECHNOLOGY IN A WIRELESS NETWORK
    Publication number: 20220361193
    Abstract: Embodiments of the present invention provide systems and methods for performing priority service access between EHT non-AP STAs or MLDs using EDCA or UORA parameter sets corresponding to enabled links that can be used to derive priority access (e.g., contention window) information of enabled links for NSEP or LL wireless communication. The EHT non-AP STAs or MLDs can enable, configure, and update priority access for NSEP or LL services using protected action frames or beacon frames, for example. Deriving priority information from the EDCA or UORA parameters carried in protected action frames or beacon frames advantageously avoids increasing the overhead of beacon frames and prevents degradation of spectrum efficiency while supporting NSEP or LL priority services.
    Type: Application
    Filed: May 2, 2022
    Publication date: November 10, 2022
    Inventors: Yonggang Fang, James Chih-Shi Yee, Kai Ying Lu, Chien-Fang Hsu, Yongho Seok
  • EDCA Schemes For Triggered TXOP Sharing Operations
    Publication number: 20220353910
    Abstract: A station (STA) associated with an access point (AP) receives, from the AP, an indication of an enhanced distributed channel access (EDCA) parameter set. The STA then updates one or more parameters of the EDCA parameter set with respect to a triggered transmission opportunity (TXOP) sharing (TXS) operation.
    Type: Application
    Filed: April 27, 2022
    Publication date: November 3, 2022
    Inventors: Kai Ying Lu, James Chih-Shi Yee, Yongho Seok
  • System and method of secure ranging measurement
    Patent number: 11490251
    Abstract: Methods and apparatus for performing secure ranging measurements between wireless devices are disclosed herein according to embodiments of the present invention. The described embodiments use key values to indicate which LTF sequence (e.g., LTF measurement exchange) to use for performing wireless ranging measurements. A LTF sequence that is received by a wireless device that does not correspond with the associated key value is determined to be invalid. Invalid LTF sequences may be disregarded as signal noise.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: November 1, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Chao-Chun Wang, Chih-Shi Yee
  • ENHANCED MULTI-LINK OPERATION BASED ON CAPABILITY AND OPERATION MODE
    Publication number: 20220346171
    Abstract: Embodiments of the present invention provide improved multi-link operation over EML links. A non-AP MLD indicating support of EMLMR operation announces it's the number of spatial streams supported for receiving or transmitting after receiving the initial frame exchange during enhanced multi-link multi-radio (EMLMR) operation (MLD level capabilities). MLD level capabilities for operating over the EMLSR links is defined so that the EMLMR capable devices can improve/optimize their performance based on their computing capabilities and RF design.
    Type: Application
    Filed: April 19, 2022
    Publication date: October 27, 2022
    Inventors: Kai Ying Lu, Hung-Tao Hsieh, Cheng-Yi Chang, James Chih-Shi Yee, Yongho Seok
  • WIRELESS FIDELITY MULTI-LINK DEVICE FOR INDICATING CAPABILITIES OF AFFILIATED STATIONS FOR DIFFERENT ENABLED LINK COMBINATIONS DURING ASSOCIATION AND RELATED CAPABILITY INDICATION METHOD
    Publication number: 20220346165
    Abstract: A capability indication method employed by a wireless fidelity (Wi-Fi) multi-link device (MLD) includes: during an association process between the Wi-Fi MLD and another Wi-Fi MLD, indicating a first capability allocation of a first combination of affiliated stations in the Wi-Fi MLD for a first combination of enabled links on the Wi-Fi MLD, and indicating a second capability allocation of a second combination of affiliated stations in the Wi-Fi MLD for a second combination of enabled links on the Wi-Fi MLD, wherein the first combination of affiliated stations is different from the second combination of affiliated stations, and the first combination of enabled links is different from the second combination of enabled links.
    Type: Application
    Filed: April 19, 2022
    Publication date: October 27, 2022
    Applicant: MEDIATEK INC.
    Inventors: Chien-Fang Hsu, Yongho Seok, James Chih-Shi Yee
  • Enhanced high-throughput multi-link operation management
    Patent number: 11483887
    Abstract: An apparatus (e.g., a station (STA) in a wireless local area network (WLAN)), receives, from an access point (AP), a frame comprising a multi-link configuration information element (IE) that indicates one or more enabled links as a subset of one or more supported links for a traffic identifier (TID). Accordingly, the apparatus transmits, to the AP, data over at least one of the one or more enabled links corresponding to the TID.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: October 25, 2022
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Yongho Seok, James Chih-Shi Yee
  • METHOD AND APPARATUS FOR DEALING WITH RESOURCE ALLOCATION AND/OR LINK ADDITION OF ACCESS POINT MULTI-LINK DEVICE
    Publication number: 20220338287
    Abstract: A management method employed by an access point (AP) multi-link device (MLD) includes: during association between the AP MLD and a non-AP MLD, obtaining capability indications signaled from the non-AP MLD, wherein the capability indications comprise at least a link addition capability indication of the non-AP MLD; and performing resource allocation for links between the AP MLD and the non-AP MLD according to at least a portion of the capability indications.
    Type: Application
    Filed: April 13, 2022
    Publication date: October 20, 2022
    Applicant: MEDIATEK INC.
    Inventors: Chien-Fang Hsu, James Chih-Shi Yee
  • SYSTEMS AND METHODS OF ENHANCED MULTI-LINK OPERATION RESPONSIVE TO TRANSMISSION FAILURE
    Publication number: 20220338253
    Abstract: Embodiments of the present invention provide improved multi-link operation over for recovering from a transmission failure on a primary link. During synchronous transmission on the NSTR pair of links, a transmission failure of an MPDU may happen on either link of the NSTR pair of links. Error recovery can be performed when an AP MLD is operating on the NSTR pair of links. When a transmission failure is detected, error recovery can be performed, and the timing of a synchronous transmission on the other wireless link can be managed to advantageously avoid IDC interference and improve performance of the wireless network.
    Type: Application
    Filed: April 12, 2022
    Publication date: October 20, 2022
    Inventors: Kai Ying Lu, Yongho Seok, James Chih-Shi Yee
  • Extremely high throughput (EHT) multi-band transmission
    Patent number: 11464027
    Abstract: System and method of cooperative multi-band wireless STA communication that enables full duplex operations. Frames are configured to carry band information and are selected to be transmitted simultaneously in multiple bands based on various constraints to avoid out-of-order delivery. For frames under a block ACK agreement, a transmit STA can specify the transmission bands for the frames in an ADDBA request frame. While a first band is transmitting a first frame under a block ACK agreement, the second band can be used to transmit a frame under the same block ACK agreement as, and from the same traffic flow with, the first frame. Otherwise, the second band can only be used to transmit a frame with a different TID than the first frame.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: October 4, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, Gabor Bajko, James Chih-Shi Yee
  • HARQ TXOP frame exchange for HARQ retransmission using HARQ threads
    Patent number: 11463201
    Abstract: Embodiments described herein provide apparatus and methods for performing HARQ operations using parallel HARQ threads, where each new transmission of a Media Access Control (MAC) Protocol Data Unit (MPDU)/Aggregate-MPDU (A-MPDU)/Physical Layer Convergence Procedure (PLCP) Service Data Unit (PSDU) triggers the activation of a HARQ thread. Each HARQ thread contains one or more HARQ coding words or coding units. A HARQ thread index is setup by a transmission opportunity (TXOP) holder for a corresponding PSDU and is used to identify HARQ threads. Transmission information such as duration in formation for PPDUs including BA/HARQ-ACK feedback such as RX/TX addresses, etc. can be determined according to previous transmission values of a received PPDU (e.g., values of a MAC or PHY header).
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: October 4, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Kaiying Lu, Jianhan Liu, James Chih-Shi Yee, Chao-Chun Wang, Thomas Edward Pare, Jr.
  • HARQ transmission scheme using multiple parallel HARQ threads
    Patent number: 11463203
    Abstract: Embodiments described herein provide apparatus and methods for performing HARQ operations using parallel HARQ threads, where each new transmission of a MPDU/A-MPDU/PSDU triggers the activation of a HARQ thread. Each HARQ thread contains one or more HARQ coding words or coding units. A HARQ thread index is setup by a transmission opportunity (TXOP) holder for a corresponding PSDU and is used to identify HARQ threads. Multiple HARQ threads can be aggregated into one PPDU for transmission (or retransmission). The maximum number of HARQ threads can be negotiated between AP and non-AP STAs based on buffer requirements, for example. A HARQ thread can end when all MPDUs associated with the HARQ thread have been decoded or other predetermined conditions are met.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: October 4, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Kaiying Lu, Jianhan Liu, Chao-Chun Wang, James Chih-Shi Yee, Yongho Seok
  • ENHANCED MULTI-LINK OPERATION SWITCHING MECHANISMS
    Publication number: 20220294583
    Abstract: Embodiments of the present invention provide an improved switching mechanism for multi-link devices that can perform frame exchanges using multiple spatial streams and automatically switch back to a listening mode on enabled links deterministically for improved throughput and reduced latency. Embodiments of the present invention are suitable for multi-link operations performed using a multi-radio device or a single-radio device.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 15, 2022
    Inventors: Kai Ying Lu, James Chih-Shi Yee, Yongho Seok, Chao-Chun Wang
  • Multi-link channel access and operation with efficient utilization of multi-link resources
    Patent number: 11432326
    Abstract: An apparatus capable of multi-link operations with respect to a first link and a second link obtains a second transmission opportunity (TXOP) on the second link after one other apparatus has started a first TXOP on the first link. The apparatus performs one or more transmissions during the second TXOP on the second link such that the second TXOP is at least partially synchronized with the first TXOP on the first link.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: August 30, 2022
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Kaiying Lu, James Chih-Shi Yee, Yongho Seok, Chao-Chun Wang, Thomas Edward Pare, Jr.
  • WIDEBAND CHANNEL ACCESS METHODOLOGY AND SYSTEM FOR 20MHZ ONLY WIRELESS STATIONS
    Publication number: 20220217631
    Abstract: Embodiments of the present invention provide a method and apparatus for providing wideband channel access to wireless devices, such as 20 MHz only wireless stations. A trigger frame is transmitted by a wireless AP to a wireless STA over a secondary wireless channel. An HE TB PPDU is received by the wireless AP from the wireless STA over the secondary wireless channel responsive to the trigger frame. The devices can switch operating channels for wireless communication to the secondary wireless channel within an existing TXOP.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Inventors: Yongho SEOK, Chao-Chun WANG, James Chih-Shi YEE
  • Bandwidth Indication With Preamble Puncturing In Wireless Communications
    Publication number: 20220201665
    Abstract: Various schemes pertaining to bandwidth indication with preamble puncturing in wireless communications are described. An apparatus (e.g., a station (STA)) receives a control frame and, in response, transmits a control response frame. In the control frame, either or both of a scrambling sequence and a SERVICE field are set to indicate bandwidth and preamble puncturing information.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 23, 2022
    Inventors: Kai Ying Lu, Yongho Seok, James Chih-Shi Yee, Jianhan Liu
  • Extremely-High-Throughput Enhanced Subchannel Selective Transmission Operation In Wireless Communications
    Publication number: 20220183062
    Abstract: Communications between an access point (AP) of an AP multi-link device (MLD) and a non-AP station (STA) of a STA MLD are established on one or more links of a plurality of links. The non-AP STA receives a frame transmitted by the AP on a first link of the plurality of links. The non-AP STA then either transmits a response to the AP on the first link responsive to receiving the frame from the AP or performs a listening operation on the plurality of links.
    Type: Application
    Filed: February 23, 2022
    Publication date: June 9, 2022
    Inventors: Yongho Seok, James Chih-Shi Yee
  • METHOD AND APPARATUS FOR SETTING UP COORDINATED SERVICE PERIOD IN MULTIPLE ACCESS POINT ENVIRONMENT
    Publication number: 20220150796
    Abstract: An access point (AP) includes a transmitter (TX) circuit, a receiver (RX) circuit, and a control circuit. The control circuit negotiates with at least one another AP via the TX circuit and the RX circuit, for setting up a coordinated service period (SP). In addition, a method for setting up the coordinated SP in a multiple AP environment includes: sending a request frame from a first AP to at least one second AP, wherein the request frame includes a plurality of SP parameters; receiving a response frame generated from the at least one second AP in response to the request frame; and in response to the response frame, setting up the coordinated SP by sending a setup frame to the at least one another AP, wherein the setup frame is set by updating at least a portion of the plurality of SP parameters.
    Type: Application
    Filed: November 10, 2021
    Publication date: May 12, 2022
    Applicant: MEDIATEK INC.
    Inventors: Chien-Fang Hsu, Chao-Chun Wang, James Chih-Shi Yee
  • Wideband channel access methodology and system for wireless stations
    Patent number: 11310736
    Abstract: Embodiments of the present invention provide a method and apparatus for providing wideband channel access to wireless devices, such as 20 MHz only wireless stations. A Target Wakeup Time (TWT) Channel field contains a bitmap indicating a temporary primary channel for using during a TWT Service Period (SP). The temporary primary channel is determined through a negotiation between a requesting STA and a responding STA, and the responding STA assigns resource units (RUs) to the requesting STA according to the temporary primary channel. After the TWT SP, the requesting STA switches back to a primary channel.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 19, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Chao-Chun Wang, James Chih-Shi Yee