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: 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
  • Publication number: 20220014406
    Abstract: Dual carrier modulation (DCM) encoded data is generated in a first half of a full signal bandwidth. The DCM encoded data generated in the first half of the full signal bandwidth is duplicated in a second half of the full signal bandwidth. The duplicated DCM encoded data in the second half of the full signal bandwidth is multiplied by a modulation vector to result in a reduced peak-to-average power ratio (PAPR) in transmission.
    Type: Application
    Filed: July 5, 2021
    Publication date: January 13, 2022
    Inventors: Gary A. Anwyl, Jianhan Liu, Shengquan Hu, Thomas Edward Pare, JR.
  • 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
  • Publication number: 20210400670
    Abstract: Accordingly, embodiments of the present invention provide methods and devices for low power transmissions that provide improved wireless coverage for 6 GHz LPI transmissions using novel tone mapping techniques. Resource units (RUs) tones are distributed over larger bandwidths to achieve higher transmission power while operating within the PSD requirements of LPI. The tone distribution can include global tone mapping of smaller RUs distributed onto larger bandwidths, or group-based tone distribution methods, for example.
    Type: Application
    Filed: June 16, 2021
    Publication date: December 23, 2021
    Inventors: Shengquan Hu, Jianhan Liu, Gary A. Anwyl, Thomas Edward Pare, Jr.
  • Publication number: 20210392644
    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: Application
    Filed: June 14, 2021
    Publication date: December 16, 2021
    Inventors: Jianhan Liu, Shengquan Hu, Thomas Edward Pare, JR.
  • Publication number: 20210385688
    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: Application
    Filed: May 28, 2021
    Publication date: December 9, 2021
    Inventors: Jianhan Liu, Shengquan Hu, Hsuan-Yu Liu, Thomas Edward Pare, JR., Yungping Hsu
  • Publication number: 20210376893
    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: Application
    Filed: May 20, 2021
    Publication date: December 2, 2021
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Patent number: 11190986
    Abstract: Mechanisms of CCA status reporting and NAV distribution for coordinated transmissions in a multi-AP WLAN. A coordinator AP may broadcast a RTS frame to a set of coordinated APs, which allow the coordinated APs with a CCA clear status to set a protected period in a CST frame to silence the associated non-AP STAs. The coordinator AP also polls the coordinated APs to have them individually report their CCA statuses as well as additional information used for transmission coordination. In some embodiments, a status report from a coordinated AP may integrate the protected period setting and the CCA clean status indication, and therefore the coordinator AP just needs to poll for such a report without using RTS/CTS exchange. A coordinated AP may set a protected period to end at the complete transmission of a coordination frame. The coordination frame may specify the remaining TXOP duration information.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: November 30, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Jianhan Liu, Yongho Seok, James June-Ming Wang, James Chih-Shi Yee, Thomas Edward Pare, Jr.
  • Publication number: 20210359724
    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: Application
    Filed: July 28, 2021
    Publication date: November 18, 2021
    Inventors: Yongho Seok, Jianhan Liu, James Chih-Shi YEE, Thomas Edward Pare, JR.
  • Publication number: 20210360521
    Abstract: Communications between an access point (AP) and a non-AP station (STA) are established in a plurality of frequency segments within a basic service set (BSS) bandwidth or on at least a first link and a second link. An extreme-high-throughput (EHT) subchannel selective transmission (SST) operation is performed between the AP and the non-AP STA in the plurality of frequency segments or on the first link and the second link. A trigger-enabled target wake time (TWT) session period (SP) for the EHT SST operation by either indicating one of the plurality of frequency segments as containing a resource unit (RU) allocation addressed to the non-AP STA or indicating one of the first link and the second link on which an operating frequency segment is located during the TWT SP.
    Type: Application
    Filed: May 10, 2021
    Publication date: November 18, 2021
    Inventors: Yongho Seok, Hung-Tao Hsieh, Jianhan Liu, James Chih-Shi Yee
  • 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.
  • Patent number: 11159286
    Abstract: System and method of OFDMA transmission in which mid-ambles are configured on a per-user basis for channel variation adaptation. The multiple channels used in an OFDMA transmission may use different mid-amble settings based on their respective channel characteristics. Particularly, some channels may have mid-ambles and some may have not, and mid-amble update intervals may vary across the channels. For a trigger-based (TB) uplink (UL) OFDMA transmission, an AP may signal the per-user mid-amble information in the user information fields of the trigger frame. For a downlink (DL) OFDMA transmission, an AP may signal the per-user mid-amble information in the HE SIG-B fields.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: October 26, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Shengquan Hu, Tianyu Wu, Jianhan Liu, Thomas Edward Pare, Jr.
  • 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
  • Publication number: 20210329628
    Abstract: A method pertaining to resource unit (RU) allocation subfield designs for trigger-based and self-contained signaling in extreme high-throughput (EHT) systems involves receiving a signaling and determining allocation of one or more RUs according to a 9-bit RU allocation subfield indicated in the signaling. The method also involves performing wireless communications using the one or more RUs.
    Type: Application
    Filed: April 8, 2021
    Publication date: October 21, 2021
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Patent number: 11152977
    Abstract: A method of sounding and feedback with channel quality information and reduced overhead is provided. A receiving station receives a sounding signal transmitted from an access point over multiple sub-channels of a wide channel in a wireless network. The receiving station detects channel quality based on the received sounding signal for each sub-channel. The receiving station then performs channel estimation based on the received sounding signal and thereby determining feedback information. Finally, the receiving station transmits a feedback message to the access point, the feedback message contains NULL feedback information, reduced feedback information, or channel integrity/quality indicators based on the channel quality information for each sub-channel. Based on the feedback message, the access point may repeat the sounding process, narrow the transmission bandwidth, or select only stations who have indicated uncorrupted channel sounding for MU-MMO transmission.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: October 19, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: James June-Ming Wang, Jianhan Liu, Vishakan Ponnampalam, Chao-Chun Wang, Huanchun Ye
  • 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
  • Publication number: 20210281372
    Abstract: Systems and methods of transmitting a PPDU to or from a single user station (STA) in an OFDMA transmission by using multiple RUs. An access point (AP) allocates multiple RUs to an STA for an OFDMA transmission and correspondingly specifies the STA ID repeatedly in the user specific field of a SIG-B field in a downlink PPDU, or in the user information fields of a trigger frame. Alternatively, multiple AIDs of the STA can be specified in the user specific field or the user information fields instead of repeating the same STA ID. An indication may be inserted in the SIG-A field to indicate that the enhanced RU allocation scheme is used for the OFDMA transmission.
    Type: Application
    Filed: May 25, 2021
    Publication date: September 9, 2021
    Inventors: Jianhan Liu, Shengquan Hu, Yongho Seok, Thomas Edward Pare, JR., Yungping Hsu
  • Publication number: 20210281382
    Abstract: A method pertaining to leftover bits processing for proportional round-robin resource unit (RU) parsing in extreme high-throughput (EHT) systems involves processing a stream of bits to provide processed bits. The method also involves transmitting the processed bits to a station (STA) over a combination of multiple resource units (RUs) assigned to the STA. In processing the stream of bits, the method may involve parsing the stream of bits to the combination of multiple RUs. Moreover, in an event of leftover bits remaining from the parsing, the method may further involve distributing the leftover bits to one or more RUs but not all RUs of the combination of multiple RUs.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.
  • Publication number: 20210281384
    Abstract: A method pertaining to enhanced resource unit (RU) allocation subfield design for extreme high-throughput (EHT) systems involves determining one or more RUs based on an RU allocation table. The method also involves performing wireless communications using the one or more RUs. The RU allocation table includes at least a combination of a plurality of aggregations of multiple RUs.
    Type: Application
    Filed: February 17, 2021
    Publication date: September 9, 2021
    Inventors: Shengquan Hu, Jianhan Liu, Thomas Edward Pare, JR.