Patents by Inventor Jianhan Liu

Jianhan Liu 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: 20230300011
    Abstract: Techniques pertaining to scalable waveform and numerology designs for next-generation wireless local area networks (WLANs) in 60 GHz frequency band are described. A first apparatus communicates in a 60 GHz frequency band wirelessly with a second apparatus based on a scalable waveform and numerology design with at least one of: (i) selection of a specific subcarrier spacing (SCS); (ii) selection of a specific guard interval (GI) design; and (iii) reuse of a preexisting channelization or tone plan.
    Type: Application
    Filed: March 7, 2023
    Publication date: September 21, 2023
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Publication number: 20230299931
    Abstract: Techniques pertaining to designs of channelization of the 60 GHz band for next-generation wireless local area networks (WLANs) are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus by communicating with a channelization design of the 60 GHz band having a channel center frequency being equal to (a channel starting frequency+?F)+?F*channelIndex, with ?F denoting a half of a channel spacing and with channelIndex denoting a channel index value.
    Type: Application
    Filed: March 7, 2023
    Publication date: September 21, 2023
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Publication number: 20230284195
    Abstract: Techniques pertaining to scalable waveform and numerology designs for next-generation wireless local area networks (WLANs) in 60 GHz are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus based on a specific numerology design with at least one of: (i) selection of a specific subcarrier frequency spacing; (ii) selection of a specific guard interval (GI) design; and (iii) reuse of a preexisting channelization or tone plan.
    Type: Application
    Filed: February 20, 2023
    Publication date: September 7, 2023
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Patent number: 11743768
    Abstract: A wireless communication link is established between a first station (STA) and a second STA in a 6-GHz band. The first STA and the second STA the communicate in the 6-GHz band using a low-power indoor (LPI) long range (LR) physical-layer protocol data unit (PPDU). The LPI LR PPDU includes a legacy preamble, a universal signal field (U-SIG), an extreme-high-throughput signal field (EHT-SIG), an extreme-high-throughput short training field (EHT-STF), an extreme-high-throughput long training field (EHT-LTF), and a payload. Each of the legacy preamble, U-SIG and EHT-SIG is modulated and duplicated over multiple 20-MHz subchannels for a 80-MHz, 160-MHz or 320-MHz bandwidth over which the LPI LR PPDU is transmitted. Each of the EHT-STF, EHT-LTF and payload is modulated and transmitted on an entirety of the 80-MHz, 160-MHz or 320-MHz bandwidth.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: August 29, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Jianhan Liu, Shengquan Hu, Hsuan-Yu Liu, Thomas Edward Pare, Jr., Yungping Hsu
  • Publication number: 20230269592
    Abstract: An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.
    Type: Application
    Filed: April 22, 2023
    Publication date: August 24, 2023
    Inventors: James June-Ming Wang, Chung-Ta Ku, Gabor Bajko, Gary A. Anwyl, Shuling Feng, Jianhan Liu, Yongho Seok, Po-Yuen Cheng, James Chih-Shi Yee, Thomas Edward Pare, JR.
  • Patent number: 11736236
    Abstract: Embodiments of the present invention provide a method and apparatus for hybrid ARQ acknowledgement and retransmission requests for decoding failed MPDUs of an A-MPDU received by an STA. The source address and receiver address of a failed MPDU can be verified according to a MAC header CRC that can be included in an A-Control frame, for example. For verifying the source address and the receiver address in MAC header, according to some embodiments, the MAC header CRC is jointly calculated over the first two octets of the MPDU delimiter of an A-MPDU subframe. Moreover, a Hybrid ARQ frame is defined to include Block Ack Bitmap subfield representing the received status of a plurality of MPDUs according to starting sequence control number, for example.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: August 22, 2023
    Assignee: Mediatek Singapore PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, Thomas Edward Pare, Jr.
  • Publication number: 20230261699
    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.
    Type: Application
    Filed: April 24, 2023
    Publication date: August 17, 2023
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi YEE, Thomas Edward Pare, JR.
  • Patent number: 11729716
    Abstract: Systems and methods of transmitting and receiving a Wake-Up Radio (WUR) packet by using a simplified preamble structure that contains no training field. The preamble carries a signature sequence selected from a set of predefined sequences, each corresponding to a different data transmission rate. The preamble and the control information of the WUR packet are transmitted in the same rate as indicated by the selected sequence. Hence, a receiving WUR can determine the data transmission rate and locate the associated control information directly if a sequence that matches a predefined signature sequence is detected. The same sequence or in combination with an additional sequence in the preamble may also be used to indicate automatic gain control synchronization, packet type and other related information.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: August 15, 2023
    Inventors: Jianhan Liu, Po-Yuen Cheng, Thomas Edward Pare, Jr.
  • Patent number: 11729666
    Abstract: Embodiments of the present invention provide a method and apparatus for enhanced data retransmission based on log-likelihood ratio (LLR) combining in WLAN. According to some embodiments, packets can be retransmitted using a modified transmission scheme. Codewords are associated with cyclic redundancy checks (CRCs) for detecting errors, and a subsequent packet is received that includes data that can be used to correct the error. For example, each packet can be encoded for both error detection and correction, and the retransmission mechanism can be adapted to the error rate. The retransmission scheme is improved by utilizing an LLR combining scheme, transmit diversity, and modified ACK methods.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: August 15, 2023
    Assignee: Mediatek Singapore PTE. LTD.
    Inventors: Jianhan Liu, Yongho Seok, Chung-ta Ku, Thomas Edward Pare, Jr.
  • Patent number: 11716613
    Abstract: An encryption mechanism used on cooperative multi-band wireless STA architecture that enables full duplex operations. In encrypting a frame, an AAD can be constructed by using a selected MAC address, which may not be associated with a band to be used for transmitting the frame in an upcoming TXOP. An STA that supports simultaneous transmission in a multi-band operation uses the same MAC address to encrypt the frames to be transmitted on different bands. An AAD is constructed by using a same MAC address corresponding to one of the transceivers. A transmit STA may specify band information used for encryption in the MAC header, which serves to signal the receive STA to decrypt the frame by using the proper information.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 1, 2023
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, Gabor Bajko
  • Patent number: 11711786
    Abstract: A method pertaining to optimization of resource unit (RU) and segment parser design for aggregated and multi-RU operations in extreme high-throughput (EHT) systems involves coding data for a station (STA) to provide a stream of coded bits. The method also involves processing the stream of coded bits to provide processed bits, including parsing the stream of coded bits to a combination of multiple RUs assigned to the STA in a proportional round-robin fashion. The method further involves transmitting the processed bits to the STA over the combination of multiple RUs.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: July 25, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, Jr.
  • Patent number: 11696270
    Abstract: An extreme-high-throughput (EHT) physical-layer protocol data unit (PPDU) is signaled between a first station (STA) and a second STA to indicate a resource unit (RU) allocation with respect to multiple users. One or more RU allocated to the first STA or the second STA as indicated in the EHT PPDU can be determined by using a RU allocation table that includes, in addition to entries corresponding to RUs allocatable to a plurality of users, one or more empty RU entries corresponding to one or more of an empty 242-tone RU, an empty 484-tone RU and an empty 996-tone RU.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: July 4, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Jianhan Liu, Shengquan Hu, Thomas Edward Pare, Jr.
  • Publication number: 20230199848
    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: February 23, 2023
    Publication date: June 22, 2023
    Inventors: Kai Ying Lu, Yongho Seok, James Chih-Shi Yee, Chao-Chun Wang, Jianhan Liu
  • Patent number: 11677499
    Abstract: Embodiments of the present invention provide a method and apparatus for tone interleaving wide channel bandwidths or transmissions using multiple-bands. Embodiments of the present invention are designed to accommodate new generations of WLAN. According to some embodiments, existing communication standards of the current generations of WLAN are used to simplify the implementation of the tone mapping schemes described herein. For example, some embodiments of the present invention use an 80 MHz channel bandwidth with resource units having 996 tones as a building block to efficiently implement new tone mapping and interleaving schemes for wider bandwidth channels.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 13, 2023
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jianhan Liu, Shengquan Hu
  • Patent number: 11678326
    Abstract: A first access point (AP) receives a second spatial reuse parameter (SRP) related to a second AP from the second AP. The first AP transmits the second SRP to at least a first communication device associated with the first apparatus. The first AP then receives a uplink (UL) transmission from the first communication device with a transmit power of the UL transmission controlled based on the second SRP.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: June 13, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: James June-Ming Wang, Yongho Seok, James Chih-Shi Yee, Jianhan Liu, Thomas Edward Pare, Jr.
  • Publication number: 20230179332
    Abstract: Techniques pertaining to detailed signaling designs for distributed-tone resource unit (dRU) transmission in wireless communications are described. An apparatus generates a frame with indications of a resource unit (RU) type and a dRU distribution bandwidth . The apparatus then transmits the frame to another apparatus. The RU type is indicated in a Common Information field or a Special User Information field of the frame. The dRU distribution bandwidth is indicated in a Spatial Stream (SS) Allocation subfield of a User Information field of the frame.
    Type: Application
    Filed: November 30, 2022
    Publication date: June 8, 2023
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Patent number: 11671837
    Abstract: An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: June 6, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: James June-Ming Wang, Chung-Ta Ku, Gabor Bajko, Gary A. Anwyl, Shuling Feng, Jianhan Liu, Yongho Seok, Po-Yuen Cheng, James Chih-Shi Yee, Thomas Edward Pare, Jr.
  • Patent number: 11659581
    Abstract: Embodiments of the present invention provide a method and device for multi-AP beamforming (e.g., nulling) and spatial reuse to mitigate interference and improve the performance of MAP wireless networks. According to one embodiment, multiple APs agree to collaborate in multi-AP beamforming, transmissions of received PDDUs are measured to determine interference information, the APS generate interference maps, and the APs perform joint and Multi-AP beamforming in a first and second BSS to avoid/mitigate interference of the MAP wireless network. An RTS and CTS frame exchange sequence can be performed prior to Multi-AP beamforming between BSSs using a flag/indicator in the RTS frame to indicate coordinated transmission, or an UL trigger frame can be used to indicate a coordinated UL transmission.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: May 23, 2023
    Assignee: Mediatek Singapore PTE. LTD.
    Inventors: James June-Ming Wang, Yongho Seok, James Chih-Shi Yee, Jianhan Liu, Thomas Edward Pare, Jr.
  • Patent number: 11646767
    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: July 28, 2021
    Date of Patent: May 9, 2023
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi Yee, Thomas Edward Pare, Jr.
  • Patent number: 11616547
    Abstract: A method pertaining to spatial configuration subfield designs of user field for multi-user multiple-input-multiple-output (MU-MIMO) allocation in extreme-high-throughput (EHT) systems involves determining a spatial stream configuration according to a 6-bit spatial configuration subfield in a lookup table (LUT). The method also involves performing a transmission using one or more spatial streams assigned based on the spatial stream configuration.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: March 28, 2023
    Assignee: MediaTek Singapore Pte. Ltd.
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, Jr.