Patents by Inventor Hanqing Lou

Hanqing Lou 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: 20220255612
    Abstract: Presently disclosed are systems and methods for beamforming training in WLANs. In various embodiments, there are unified MIMO beamforming training procedure, which includes a training period in which an initiator transmits multiple unified training frames for performing a transmit-beamforming training of the initiator and a receive-beamforming training of one or more responders; a feedback period in which each responder replies with a beamforming-feedback response; and an acknowledgement period during which the initiator transmits respective acknowledgement frames to the one or more responders from which responses were received. Rules for restricted random access in various slots of the feedback period may be implemented, to address response contention between multiple qualifying responders.
    Type: Application
    Filed: April 27, 2022
    Publication date: August 11, 2022
    Inventors: Hanqing Lou, Xiaofei Wang, Oghenekome Oteri
  • Publication number: 20220255693
    Abstract: Methods and apparatuses are described herein for feedback based midamble adaptation. For example, a first station (STA) may transmit, to a second STA, a request frame that includes an indicator indicating a request for midamble information. The first STA may receive, from the second STA, a response frame that includes the midamble information determined by the second STA based on one or more channel measurements associated with the second STA. The midamble information may include a midamble report, a Doppler measurement report, or the like. The midamble report or the Doppler measurement report may include at least one of a midamble periodicity, a mobility/Doppler level, or the like. Based on the midamble information, the first STA may generate a physical layer convergence procedure (PLCP) protocol data unit (PPDU) that includes at least one midamble within a data portion of the PPDU.
    Type: Application
    Filed: July 10, 2020
    Publication date: August 11, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Li-Hsiang Sun, Rui Yang, Joseph S. Levy, Xiaofei Wang
  • Publication number: 20220248457
    Abstract: Methods, devices and systems are provided for performing for multi-user (MU) transmission. A wireless transmit/receive unit (WTRU) may be configured to receive a frame, decode the received frame and determine whether the received frame is a null data packet (NDP) multi-user (MU) media access control (MAC) physical layer convergence protocol (PLCP) protocol data unit (PPDU) (NDP MU MAC PPDU) based on meeting an NDP condition. The NDP MU MAC PPDU may correspond to an MU transmission and may include a PLCP header which includes an NDP signal (SIG) field having MU control information. Based on the received frame meeting the NDP condition, the WTRU may be further configured to process the NDP SIG field, generate a response based on the NDP SIG field and the MU control information, and transmit the response.
    Type: Application
    Filed: April 25, 2022
    Publication date: August 4, 2022
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Guodong Zhang, Robert L. Olesen, Xiaofei Wang
  • Patent number: 11405820
    Abstract: Mechanisms may be used for aggregating acknowledgement (ACK), block ACK (BA) and/or short packets transmissions for multi-user (MU) wireless communication systems. Aggregation mechanisms may be used for uplink (UL) and/or downlink (DL) orthogonal frequency division multiple access (OFDMA), and/or UL/DL multiple-user multiple input multiple output (MU-MIMO) transmissions, for example. Multi-user short packets may be aggregated and/or simultaneously transmitted for DL, UL, or peer-to-peer (P2P) transmissions.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: August 2, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Fengjun Xi, Hanqing Lou, Oghenekome Oteri, Nirav B. Shah, Robert L. Olesen, Yuan Sheng Jin, Pengfei Xia, Frank La Sita, Guodong Zhang
  • Publication number: 20220240239
    Abstract: A method and apparatus may be used to support coordinated and cooperative sectorized transmissions. Power control and clear channel assessment for sectorized transmissions may be used, along with sectorized beacon and associated procedures. Transmissions in a network may be protected by a first access point (AP) sending an omni-directional transmission and a beamformed or sectorized transmission to a station (STA), an overlapping basic service set (OBSS) confirming a spatially orthogonal (SO) condition based on the omni-directional transmission, and a second AP monitoring the omni-directional transmission and confirming the SO condition. The STA may be configured to receive a request-to-send (RTS) frame indicating data is available for transmission, and transmit a cooperative sectorized (CS) clear-to-send (CTS) frame indicating an ability for multiple AP reception.
    Type: Application
    Filed: April 12, 2022
    Publication date: July 28, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Pengfei Xia, Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Monisha Ghosh, Robert Olesen
  • Patent number: 11395335
    Abstract: A wireless transmit/receive unit (WTRU) may perform listen before talk (LBT) on a channel prior to uplink transmission on the channel. The WTRU may adjust an amount of time that the WTRU performs LBT. For example, WTRU may receive a set of transmission opportunities. The WTRU may receive a contention window size (CWS) sequence including a CWS for each transmission opportunity. The CWS sequence may be unique and may be based on the identity of the WTRU. For a given transmission opportunity, the WTRU may select a random number between zero and the CWS for that transmission opportunity. If the channel is clear for at least an amount of time associated with the random number, the WTRU may transmit in the transmission opportunity. If the channel is not clear for at least an amount of time associated with the random number, the WTRU may not transmit in the transmission opportunity.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: July 19, 2022
    Assignee: IDAC Holdings, Inc.
    Inventors: Hanqing Lou, Oghenekome Oteri, Xiaofei Wang, Ahmad Reza Hedayat, Alphan Sahin, Rui Yang, Kyle Jung-Lin Pan
  • Patent number: 11395231
    Abstract: Methods and apparatuses are described herein for network discovery. A wireless transmit/receive unit (WTRU) may transmit, to a first access point (AP), via a Primary Connectivity Radio (PCR), a request indicating that on a condition that the WTRU is disassociated from the first AP, the WTRU will enter a wake-up radio (WUR) only discovery mode. The WTRU may receive, from the first AP, via the PCR, a management frame that has WUR discovery elements including an indication of at least one channel used by a second AP. The WTRU may perform disassociation from the first AP. The WTRU may activate a WUR and deactivate the PCR. On a condition that the WTRU is disassociated from the first AP, the WTRU may receive, from the second AP, via the WUR, a WUR frame over the at least one channel to enable the WTRU to activate the PCR to initiate association.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: July 19, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Li-Hsiang Sun, Hanqing Lou, Oghenekome Oteri, Joseph S. Levy, Rui Yang, Alphan Sahin
  • Publication number: 20220225323
    Abstract: Techniques, devices and systems are disclosed for generating a resource request poll comprising at least one response criteria, transmitting the resource request poll, receiving a resource request report from STAs that meet at least one response criteria. A trigger frame may be transmitted to the at least one STA based on the resource request report from the at least one STA. The response criteria may include at least one of a NFRP, a UL access type, a delay bound, an NDP feedback report AC, a number of indicated AID bits, an AID range, an information requested, a number of bits to be included in NDP feedback report or preamble, number of LTFs to be included in the NDP feedback report or preamble, and a number of bits to be included in NDP feedback report or preamble per LTF or per N LTF symbol.
    Type: Application
    Filed: May 1, 2020
    Publication date: July 14, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Xiaofei Wang, Hanqing Lou, Alphan Sahin, Li-Hsiang Sun, Joseph S. Levy, Rui Yang
  • Publication number: 20220217770
    Abstract: Methods and apparatuses for enhancing random access procedures are described herein. A method performed by an access point (AP) may comprise allocating a plurality of random access (RA) resource units (RA-RUs) for transmitting a message from a station (STA) to the AP over an upper or lower frequency band. The method may comprise transmitting, to a station (STA), one or more physical layer convergence procedure (PLCP) protocol data unit (PPDU) over the upper or lower frequency bands. Each of the one or more PPDUs may include a trigger frame, and the trigger frame may include an indication of the plurality of RA-RUs and a target received signal strength indicator (TRSSI) associated with at least one of the upper or lower frequency bands. The method may comprise receiving, in response to the trigger frame, the message from the STA in one of the plurality of RA-RUs.
    Type: Application
    Filed: May 8, 2020
    Publication date: July 7, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Li Hsiang Sun, Hanqing Lou, Alphan Sahin, Xiaofei Wang, Rui Yang, Frank La Sita
  • Publication number: 20220216898
    Abstract: Systems, methods, and devices for beamforming (BF) training are disclosed. In some examples, a receiver is configured to receive sector sweep (SSW) training frames from an initiator device that each indicate an antenna sector of the initiator device. A transmitter is configured to transmit sector sweep (SSW) training frames to the initiator device that indicate a best received antenna sector of the initiator device. The receiver receives a sector sweep feedback (SSW FB) frame from the initiator device, and the transmitter transmits transmit a sector sweep acknowledgement (SSW ACK) frame to the initiator device that indicates an antenna sector of the initiator device that is different from the antenna sector indicated by the SSW FB frame, if the SSW FB frame was best received by an antenna not corresponding to the best received antenna sector of the initiator device.
    Type: Application
    Filed: March 21, 2022
    Publication date: July 7, 2022
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Li Hsiang Sun, Oghenekome Oteri, Xiaofei Wang, Rui Yang
  • Patent number: 11375448
    Abstract: A method for beacon information provisioning, transmissions and protocol enhancements includes defining multiple level beacons based on the attributes of beacon information fields/elements. A short beacon may be used in addition to a primary beacon in space-time block code (STBC) modes, non-STBC modes and in multiple bandwidth modes. The short beacons may also be used for Fast Initial Link Setup (FILS) and to extend system coverage range. Beacon transmissions may use adaptive modulation and coding set/scheme (MCS).
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 28, 2022
    Assignee: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Sudheer A. Grandhi, Lei Wang, Guodong Zhang, Xiaofei Wang, Monisha Ghosh, Hanqing Lou
  • Patent number: 11363589
    Abstract: A method, apparatus, and system for beamforming training using a wireless transmit receive unit (WTRU). A WTRU may receive an indication of a number of space time slots (STSs) from an access point (AP) within a beacon frame during a beamforming training allocation. The WTRU may send a response signal to the AP in a specific STS based on a function of the number of STSs. The WTRU may receive an acknowledgement (ACK) from the AP confirming the response was received. Alternatively, the AP may send a signal indicating that a collision occurred and alter the number of STSs, and the WTRU may try again in the next beamforming training allocation.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: June 14, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Rui Yang
  • Publication number: 20220173773
    Abstract: A method for multiple access point (AP) transmission is disclosed. The method comprises receiving a repetition beacon from each of a plurality of APs, each received repetition beacon comprising a common information part and an AP-specific information part; decoding at least a subset of the received common information parts to obtain a first parameter; decoding the received AP-specific information parts to obtain a second parameter for each of the plurality of APs; performing a calculation based on the first parameter, the obtained second parameters and a number of the plurality of APs to obtain a calculation result; and transmitting a feedback based on the calculation result to the plurality of AP.
    Type: Application
    Filed: March 6, 2020
    Publication date: June 2, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Oghenekome Oteri, Rui Yang, Joseph S. Levy, Frank La Sita
  • Publication number: 20220173780
    Abstract: Systems, methods, and instrumentalities are disclosed for adaptation of multiple input multiple output (MIMO) mode in mmW Wireless Local Area Network (WLAN) systems. A first station (STA) may receive a mode change request from a second STA. The mode change request may indicate a mode change for a MIMO mode, a polarization mode, and/or an orthogonal frequency-division multiple access (OFDMA) mode. The mode change request may include one or more STA fields. The one or more STA fields may include a STA field associated with the first STA. Each of the one or more STA fields may include a MIMO mode subfield, a polarization mode subfield, and/or an OFDMA mode subfield. The first STA may change the MIMO mode, the polarization mode, and/or the OFDMA mode, for example, based on the mode change request. The first STA may send a mode change response to the second STA.
    Type: Application
    Filed: November 1, 2021
    Publication date: June 2, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome Oteri, Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Alphan Sahin, Rui Yang
  • Patent number: 11349551
    Abstract: Presently disclosed are systems and methods for beamforming training in WLANs. In various embodiments, there are unified MIMO beamforming training procedure, which includes a training period in which an initiator transmits multiple unified training frames for performing a transmit-beamforming training of the initiator and a receive-beamforming training of one or more responders; a feedback period in which each responder replies with a beamforming-feedback response; and an acknowledgement period during which the initiator transmits respective acknowledgement frames to the one or more responders from which responses were received. Rules for restricted random access in various slots of the feedback period may be implemented, to address response contention between multiple qualifying responders.
    Type: Grant
    Filed: June 9, 2021
    Date of Patent: May 31, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Xiaofei Wang, Oghenekome Oteri
  • Publication number: 20220167409
    Abstract: Systems, methods, and instrumentalities are described to implement an interference management method. A method performed by an Access Point (AP) may include receiving, from a station (STA) associated with a first basic service set (BSS), information indicating support for coordinated carrier sense multiple access with collision avoidance (CSMA/CA) and receiving information associated with a second BSS. The method may further include coordinating, based on the received information associated with the second BSS, carrier sense multiple access with collision avoidance (CSMA/CA) access among STAs of the first BSS to minimize interference of the STA.
    Type: Application
    Filed: November 30, 2021
    Publication date: May 26, 2022
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanqing Lou, Monisha Ghosh, Robert L. Olesen, Frank La Sita, Xiaofei Wang, Pengfei Xia, Nirav B. Shah
  • Publication number: 20220166470
    Abstract: Methods and apparatuses for multiple input-multiple output (MIMO) channel access are provided herein. A method performed by a station may include receiving, from an access point (AP), a frame including information indicating a broadcast address. The frame may further include a control trailer including information indicating that a multi-user multiple input-multiple output (MU-MIMO) frame is to be transmitted by the AP and information indicative of a designation of a plurality of STAs, the plurality of STAs including the STA. The frame may solicit response frames from at least the designated plurality of STAs. The method may further include transmitting a response frame to the indicated broadcast address and receiving the MU-MIMO frame from the AP.
    Type: Application
    Filed: February 8, 2022
    Publication date: May 26, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Li-Hsiang Sun, Hanqing Lou, Alphan Sahin, Oghenekome Oteri, Rui Yang, Xiaofei Wang, Frank La Sita
  • Publication number: 20220150736
    Abstract: An enhanced sector level sweep procedure is provided herein. A method may include transmitting a plurality of beacon frames in a corresponding plurality of transmit sectors, wherein the plurality of beacon frames are transmitted within a beacon interval. The method may include receiving, from a second communication device, a first transmission including information indicating a first ranking. The first ranking is based on a characteristic of at least a first subset of the transmit sectors. The first transmission is received in a sector corresponding to one of the first subset of transmit sectors. The method may include receiving, from a third communication device, a second transmission including information indicating a second ranking. The second ranking is based on a characteristic of at least a second subset of the transmit sectors. The first transmission is received in a sector corresponding to one of the second subset of transmit sectors.
    Type: Application
    Filed: January 27, 2022
    Publication date: May 12, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Oghenekome Oteri, Rui Yang
  • Publication number: 20220140952
    Abstract: Systems, methods, and instrumentalities are provided to implement a method of communicating a feedback in a wireless local area network (WLAN). A WLAN device may receive a data frame with a hybrid automatic repeat request (HARQ) data indicator in a frame header. The WLAN device may send an acknowledgement frame when the data frame is correctly received and decoded. The WLAN device may send a negative acknowledgement frame when the data frame is not correctly received and decoded.
    Type: Application
    Filed: January 18, 2022
    Publication date: May 5, 2022
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Monisha Ghosh, Hanqing Lou, Robert Olesen, Oghenekome Oteri, Nirav B. Shah, Xiaofei Wang, Pengfei Xia, Guodong Zhang
  • Publication number: 20220132421
    Abstract: A method for use in a wireless transmit/receive unit (WTRU) is disclosed. The method comprises: generating, by a Station Management Entity (SME), a request primitive enabling a wake-up radio (WUR) scanning process for WUR discovery frames transmitted by one or more access points (APs), the request primitive comprising a plurality of first parameters; conducting the WUR scanning process using WUR based on the plurality of the first parameters; generating, at a MAC layer, at least one confirm primitive based on a result of the WUR scanning process and at least a part of the plurality of first parameters; and communicating, from the MAC layer to the SME, the at least one confirm primitive.
    Type: Application
    Filed: February 28, 2020
    Publication date: April 28, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Xiaofei Wang, Oghenekome Oteri, Joseph S. Levy, Hanqing Lou, Li-Hsiang Sun