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).

  • 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.
  • 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
  • Trigger Response Mechanism For Non-Simultaneous-Transmission-And-Reception Multi-Link Devices
    Publication number: 20220095401
    Abstract: A station (STA) affiliated with a multi-link device (MLD) that belongs to a non-simultaneous-transmission-and-reception (NSTR) link pair receives a trigger frame from an access point (AP). The STA determines whether to respond to the trigger frame. In response to determining to respond to the trigger frame, the STA transmits a trigger-based (TB) physical-layer protocol data unit (PPDU) with at least one restriction.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 24, 2022
    Inventors: Kai Ying Lu, James Chih-Shi Yee, Yongho Seok
  • METHODS AND DEVICES FOR MULTI-LINK CONTENTION BASED ADMISSION CONTROL IN A WIRELESS NETWORK
    Publication number: 20220095167
    Abstract: Embodiments of the present invention provide methods and devices for performing admission control in a wireless network. Admission control can be used to set usage limits for wireless devices in the network. When admission control is enabled, a wireless station does not transmit frames if the current channel usage time is greater than a predefined time limit. The admission control parameters can be specific to an access category (AC), such as best effort (BE), voice (VO), video (VI), and background (BK). According to some implementations, the admission control is performed on a link-level. According to other implementations, the admission control is performed at a multi-link device (MLD) level.
    Type: Application
    Filed: September 15, 2021
    Publication date: March 24, 2022
    Inventors: Yongho Seok, Kai Ying Lu, James Chih-Shi Yee
  • Multi-link operation setup and channel access control
    Patent number: 11272536
    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. Embodiments of the present invention support joint or independent transmission of data over different links, and a full duplex connection can be enabled by independent multi-band operation e.g., a frequency division duplex mode.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: March 8, 2022
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, Gabor Bajko, James Chih-Shi Yee
  • EHT Error Recovery In Synchronous Multiple-Frame Transmission In Wireless Communications
    Publication number: 20220053441
    Abstract: Various examples pertaining to extremely-high-throughput (EHT) error recovery in synchronous multiple-frame transmission in wireless communications are described. A multi-link device (MLD) detects a failure related to either or both of a first frame exchange sequence on a first link or a second frame exchange sequence on a second link. In response to the detecting, the MLD adjusts a timing of either or both of a first subsequent transmission on the first link and a second subsequent transmission on the second link to align the first and second subsequent transmissions.
    Type: Application
    Filed: August 11, 2021
    Publication date: February 17, 2022
    Inventors: Yongho Seok, Kai Ying Lu, James Chih-Shi Yee
  • Null Data Packet Sounding for Preamble Puncture Techniques
    Publication number: 20220045725
    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: Application
    Filed: October 22, 2021
    Publication date: February 10, 2022
    Inventors: Yongho Seok, Jianhan Liu, Chao-Chun Wang, James Chih-Shi YEE
  • Wide Bandwidth Transmission Schemes
    Publication number: 20220030450
    Abstract: An access point (AP) and a station (STA) communicate with each other, with the AP indicating to the STA either or both of a preamble detection (PD) channel and a signaling (SIG) content channel and with the STA being initially monitoring a primary frequency segment of a plurality of frequency segments in an operating bandwidth of the AP. A downlink (DL) or triggered uplink (UL) communication is performed between the AP and the STA during a transmission opportunity (TXOP) such that: (i) during the TXOP, the STA monitors a preamble on the PD channel and decodes a SIG content on the SIG content channel; and (ii) after an end of the TXOP, the STA switches to the primary frequency segment.
    Type: Application
    Filed: July 21, 2021
    Publication date: January 27, 2022
    Inventors: Kai Ying Lu, Yongho Seok, Hung-Tao Hsieh, Cheng-Yi Chang, James Chih-Shi Yee, Jianhan Liu, Po-Yuen Cheng
  • Bandwidth Extension Indication And Negotiation In Wireless Communications
    Publication number: 20210400727
    Abstract: A first station (STA) and a second STA perform bandwidth negotiation with a bandwidth extension indication. Then the first STA and the second STA communicate wirelessly according to the bandwidth negotiation.
    Type: Application
    Filed: June 17, 2021
    Publication date: December 23, 2021
    Inventors: Kai Ying Lu, Yongho Seok, James Chih-Shi Yee, Chao-Chun Wang, Jianhan Liu
  • METHOD AND APPARATUS FOR COLLECTING LATENCY INFORMATION AND GENERATING UPLINK LATENCY INDICATORS ON ACCESS POINT SIDE
    Publication number: 20210391933
    Abstract: An uplink (UL) latency indication method includes: collecting, by an access point (AP), latency information associated with communications with at least one non-AP station (STA), without asking latency measurement on said at least one non-AP STA; and performing statistical analysis on the latency information to generate at least one UL latency indicator.
    Type: Application
    Filed: June 8, 2021
    Publication date: December 16, 2021
    Inventors: Chien-Fang Hsu, James Chih-Shi Yee
  • Wide-Bandwidth Transmission In Wireless Communications
    Publication number: 20210392587
    Abstract: An apparatus (e.g., an access point (AP) or a non-AP station (STA)) detects a non-primary subband of an operating bandwidth comprising a primary subband and the non-primary subband to be idle. The apparatus controls a transmit power in performing transmission on at least the non-primary subband.
    Type: Application
    Filed: June 10, 2021
    Publication date: December 16, 2021
    Inventors: Kai Ying Lu, Hung-Tao Hsieh, Yen-Shuo Lu, Chao-Chun Wang, James Chih-Shi Yee, Yongho Seok
  • Extreme-High-Throughput Multi-Link Dynamic Antenna Switching In Wireless Communications
    Publication number: 20210377928
    Abstract: A non-access point (non-AP) station (STA) multi-link device (MLD) receives a transmission from an access point (AP) MLD. In response to receiving the transmission, the non-AP STA MLD communicates with the AP MLD using an increased number of spatial streams with multi-link dynamic antenna switching at the non-AP STA MLD.
    Type: Application
    Filed: May 25, 2021
    Publication date: December 2, 2021
    Inventors: Yongho Seok, Hung-Tao Hsieh, Cheng-Yi Chang, James Chih-Shi Yee
  • METHOD AND APPARATUS OF USING AGGREGATED CONTROL SUBFIELD FOR TRAFFIC INDICATION SIGNALING
    Publication number: 20210377778
    Abstract: A traffic indication signaling method includes: setting a control information subfield in an aggregated control (A-Control) subfield by traffic indication information, wherein the traffic indication information contains timing information of uplink (UL) traffic; and transmitting a frame that includes the A-Control subfield to an access point (AP). For example, the UL traffic is required by a latency sensitive traffic application.
    Type: Application
    Filed: May 20, 2021
    Publication date: December 2, 2021
    Inventors: Chien-Fang Hsu, Kai Ying Lu, Yongho Seok, James Chih-Shi Yee