Patents by Inventor Xiaofei Wang

Xiaofei Wang 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).

  • METHODS AND APPARATUS FOR JOINT MULTI-AP TRANSMISSION IN WLANS
    Publication number: 20220030611
    Abstract: A method of multi-access point (multi-AP) communication performed by a wireless transmit/receive unit (WTRU) comprises: receiving (1510) a first trigger frame from a first access point (AP) of a plurality of APs, the first trigger frame comprising first information; receiving (1520) a second trigger frame from a second AP of the plurality of APs at a predetermined time duration after receiving the first trigger frame, the second trigger frame also comprising the first information of the first trigger frame; generating (1530) a synchronization frame based on the first trigger frame and the second trigger frame, the synchronization frame comprising synchronization information; transmitting the synchronization frame to at least the first AP and the second AP; and receiving (1540) a data transmission based on the synchronization information from each of the first AP and the second AP.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 27, 2022
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome Oteri, Hanqing Lou, Li-Hsiang Sun, Xiaofei Wang, Alphan Sahin, Rui Yang, Frank La Sita
  • Method and apparatus for multi-user concurrent random access for wireless local area networks (WLANS)
    Patent number: 11234267
    Abstract: Methods and apparatus are described. A station includes a transceiver and a processor, which detect a trigger frame for an uplink (UL) multi-user (MU) transmission. The trigger frame includes a user information field with an allocation of one or more random access resource units (RUs) and a common information field with information to set high efficiency (HE) SIGNAL-A (HE-SIG-A) fields in the UL MU transmission. The transceiver and the processor generate an HE trigger-based (TB) physical layer protocol data unit (PPDU) and set an HE-SIG-A field in the HE TB PPDU using the information in the trigger frame. The transceiver and the processor select one of the one or more random access RUs and transmit the HE TB PPDU, using the selected one of the one or more random access RUs, a short inter-frame space after the trigger frame.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: January 25, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Guodong Zhang, Li-Hsiang Sun, Oghenekome Oteri, Robert L. Olesen, Fengjun Xi, Rui Yang, Xiaofei Wang
  • Systems and methods for smart HARQ for WiFi
    Patent number: 11228401
    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: Grant
    Filed: December 13, 2019
    Date of Patent: January 18, 2022
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Guodong Zhang, Robert L. Olesen, Hanqing Lou, Monisha Ghosh, Pengfei Xia, Nirav B. Shah, Oghenekome Oteri
  • METHODS AND APPARATUS FOR HARQ IN WIRELESS NETWORKS
    Publication number: 20210409165
    Abstract: Methods and apparatuses are described herein for HARQ signaling and communications in wireless networks. For example, a method implemented in a STA comprises receiving a first MU transmission including a first set of HARQ bits, a first set of user data for STAs including the STA, a preamble including information indicating that the MU transmission includes the first set of HARQ bits, and a first set of HARQ Process IDs associated with the first set of HARQ bits; determining a subset of HARQ bits of the first set of HARQ bits; transmitting a response message indicating a reception status of the subset of HARQ bits; and receiving a second MU transmission including a second set of HARQ bits, a second set of user data for the plurality of STAs, and a second set of HARQ Process IDs associated with the second set of HARQ bits.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 30, 2021
    Inventors: Xiaofei Wang, Oghenekome Oteri, Hanqing Lou, Li Hsiang Sun, Joseph Levy, Alphan Sahin, Frank LaSita
  • METHOD AND SYSTEM FOR SOUNDING AND CHANNEL SELECTION
    Publication number: 20210400731
    Abstract: A STA may comprise a receiver configured to receive, from an AP, a first polling frame addressed to a broadcast address and sent to a plurality of STAs. The first polling frame may indicate a plurality of sub-channels. The STA may further comprise a transmitter configured to transmit, to the AP, a first PPDU indicating SNR information, on one or more sub-channels of the plurality of sub-channels, a SIFS after the first polling frame is received. The transmitter may be configured to transmit the first PPDU while a second PPDU is transmitted to the AP by another STA of the plurality of STAs, wherein the second PPDU is transmitted on one or more other sub-channels of the plurality of sub-channels.
    Type: Application
    Filed: September 2, 2021
    Publication date: December 23, 2021
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Xiaofei Wang, Oghenekome Oteri, Robert Olesen
  • METHODS FOR ENHANCING WLAN WITH ADVANCED HARQ DESIGN
    Publication number: 20210399838
    Abstract: Methods and apparatus for multi-hybrid automatic repeat request (HARQ) transmission are provided. An access point (AP) may transmit a multi-HARQ transmission to a plurality of stations (STAs). The AP may receive a H-ARQ feedback response from the plurality of STAs. The H-ARQ feedback may include a field to indicate that the H-ARQ feedback is a codeword (CW)/CW group (CWG) based acknowledgment. The H-ARQ feedback may include a packet identification (ID). The packet ID may be a HARQ transmission ID, a sequence number, a MPDU ID or a PPDU ID. The packet ID may be carried in a PLCP header. The H-ARQ feedback may be an aggregated CW/CWG acknowledgment. The H-ARQ feedback may be carried in a null data packet (NDP). A PLCP header of the NDP packet may include a wideband PLCP header and a narrow band PLCP header.
    Type: Application
    Filed: November 8, 2019
    Publication date: December 23, 2021
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Hanqing Lou, Alphan Sahin, Xiaofei Wang, Oghenekome Oteri, Frank La Sita, Li-Hsiang Sun, Rui Yang, Joseph S. Levy
  • SYSTEMS, METHODS AND APPARATUSES FOR MULTIPLE ACCESS POINT (MULTI-AP) COORDINATION IN WIRELESS LOCAL AREA NETWORKS (WLANS)
    Publication number: 20210385779
    Abstract: Methods and apparatuses are described herein for multiple AP coordination in wireless local area networks (WLANs). For example, a station (STA) may receive, from a first access points (APs), a probe response frame that includes one or more indicators indicating multiple AP operation capabilities of the first AP and a second AP. The STA may transmit, to at least one of the first AP or the second AP, a multiple AP association request frame that enables the first AP to be associated with the second AP for a multiple AP operation. The STA may receive, from the first AP, a first multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the first AP. The STA may receive, from the second AP, a second multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the second AP.
    Type: Application
    Filed: November 8, 2019
    Publication date: December 9, 2021
    Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
    Inventors: Oghenekome Oteri, Alphan Sahin, Xiaofei Wang, Hanqing Lou, Li-Hsiang Sun, Rui Yang, Frank La Sita
  • HIERARCHICAL CONTROL METHOD FOR ISLAND POWER GRID ENERGY STORAGE SYSTEM FOR INCREASING NEW ENERGY GENERATION FLUCTUATION
    Publication number: 20210376614
    Abstract: A hierarchical control method for an island power grid energy storage system for increasing new energy generation fluctuation is disclosed. The method includes implementing a rolling dispatch method based on an idea of model predictive control; comprehensively considering a response capability of the energy storage system to grid-wide economic dispatch instructions and life loss of energy storage lithium batteries, and constructing an objective function of an intraday control model of the energy storage system with economic optimization; and constructing, on a basis of satisfying the objective function of the intraday control model, a real-time control model of the energy storage system and solving the model, and determining charge and discharge plans of a lithium battery energy storage system and a supercapacitor energy storage system.
    Type: Application
    Filed: October 11, 2020
    Publication date: December 2, 2021
    Inventors: Jian Yang, Jianhua Lv, Guode Ying, Zuofu Jiang, Xin Wang, Haohua Wu, Yongling Li, Jianjun Zhu, Daojian Hong, Haili Liang, Huiqi Chen, Qingxi Cai, Baorong Liu, Yiting Hu, Xingbai Wang, Chuhang Xu, Lijun Zhu, Qiang Gao, Xinghui Jiang, Xiaofei Wang, Yin Lin, Xun Ma
  • Systems and methods for fractional carrier sense multiple access with collision avoidance (CSMA/CA) for WLANS
    Patent number: 11191104
    Abstract: Systems, methods, and instrumentalities are described to implement an interference management method in WLAN. An access point (AP) or an inter-BSS coordinator (IBC) may identify a station (STA) associated with a first basic service set (BSS) as an edge STA or a non-edge STA. The AP or the IBC may group the edge STA into an edge group and a non-edge STA into a non-edge group. The AP or the IBC may receive information associated with a second BSS. The AP or the IBC may coordinate access of the edge group and/or the non-edge group. The access may be coordinated to minimize interference of the edge STA. The access may be based at least on the received information associated with the second BSS. The AP or the IBC may adjust transmit power of a plurality of STAs identified as edge group STAs and non-edge group STAs.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: November 30, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanging Lou, Monisha Ghosh, Robert L. Olesen, Frank La Sita, Xiaofei Wang, Pengfei Xia, Nirav B. Shah
  • CHANNEL ACCESS METHODS AND LISTEN-BEFORE-TALK SOLUTIONS FOR NEW RADIO OPERATION IN UNLICENSED BANDS
    Publication number: 20210368541
    Abstract: Methods, systems, and devices for channel access and listen-before-talk approaches for new radio operation in unlicensed bands and/or licensed bands. A gNB and a wireless transmit/receive unit (WTRU) may operate in unlicensed spectrum. The gNB may perform listen-before-talk operation, and when successful, may send a downlink control channel with a slot format indication (SFI) to the WTRU. There may also be a handshaking procedure with an exchange of a request to transmit (RTT) and a request to receive (RTR). Prior to receiving the downlink channel, the WTRU may monitor search spaces at a first level, and once the downlink channel is received the WTRU may monitor search spaces at a second level. At the end of transmission, the WTRU may revert back to monitoring search spaces at the first level.
    Type: Application
    Filed: January 10, 2019
    Publication date: November 25, 2021
    Applicant: IDAC HOLDINGS, INC.
    Inventors: Ahmad Reza Hedayat, Oghenekome Oteri, Hanqing Lou, Mahmoud Taherzadeh Boroujeni, Xiaofei Wang, Rui Yang, Shahrokh Nayeb Nazar
  • TRIGGERED TRANSMISSION OPPORTUNITY AND MULTIPLE USER ACK PROCEDURES IN WLAN SYSTEMS
    Publication number: 20210367716
    Abstract: A method performed by a STA of a WLAN may comprise receiving a trigger frame, from an AP. The trigger frame may be a trigger for uplink MU data transmission and the trigger frame may indicate a traffic priority. In response to receiving the trigger frame, the STA may transmit at least one A-MPDU comprising a plurality of data units. At least one of the plurality of data units may have a priority greater than the indicated traffic priority and another one of the plurality of data units may have a priority equal to the indicated traffic priority.
    Type: Application
    Filed: August 3, 2021
    Publication date: November 25, 2021
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei WANG, Fengjun XI, Hanqing LOU, Robert L. OLESEN, Frank LA SITA, Guodong ZHANG
  • METHOD AND APPARATUS FOR NEGOTIATING A BLOCK ACKNOWLEDGEMENT AGREEMENT
    Publication number: 20210367739
    Abstract: A method performed by a STA may comprise transmitting a first negotiation message to an AP and receiving a second negotiation message from the AP. The first negotiation message and the second negotiation message may negotiate a block acknowledgement agreement. The method may further comprise receiving a data unit, from the AP, the data unit having a duration field indicating a duration of a block-ACK frame. The duration of the block-ACK frame may be determined based on the negotiated block ACK agreement. A block-ACK frame may be transmitted within the duration indicated by the duration field.
    Type: Application
    Filed: August 3, 2021
    Publication date: November 25, 2021
    Applicant: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Hanqing Lou, Monisha Ghosh, Sudheer A. Grandhi
  • METHODS FOR EFFICIENT POWER SAVING FOR WAKE UP RADIOS
    Publication number: 20210360531
    Abstract: Exemplary embodiments disclosed herein provide procedures for power efficient and rapid access point (AP) discovery using wake up radios. Additional embodiments provide procedures for securely waking up stations (STAs) using wake up radios (WURs). Methods are further described herein for coverage range detection and STA roaming for wake up radios. Further embodiments relate to procedures for coexistence for wake up radios and primary connectivity radios.
    Type: Application
    Filed: July 26, 2021
    Publication date: November 18, 2021
    Inventors: Xiaofei Wang, Li-Hsiang Sun, Oghenekome Oteri
  • Access point and method for instructing link resumption of a station in a power saving mode
    Patent number: 11166324
    Abstract: A method performed by an AP may comprise initializing a CCC and increasing the CCC upon a change of at least one of a plurality of parameters of the AP. The plurality of parameters may include at least a high throughput (HT) Operation element, one or more Enhanced Distributed Channel Access (EDCA) parameters, or one or more operational mode parameters. The method may further comprise transmitting a frame, to at least one STA, wherein the frame includes an indication of the CCC, and the frame indicates that the at least one STA return from a power saving mode.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: November 2, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Lei Wang, Yousif Targali, Sudheer A. Grandhi, Xiaofei Wang, Guodong Zhang
  • Adaptation of MIMO mode in MMW WLAN systems
    Patent number: 11165476
    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: Grant
    Filed: July 21, 2017
    Date of Patent: November 2, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Oghenekome Oteri, Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Alphan Sahin, Rui Yang
  • Methods for concurrent link setup and downlink data retrieval for high efficiency WLAN
    Patent number: 11160112
    Abstract: Systems, methods, and instrumentalities are disclosed for concurrent link setup and downlink data retrieval, e.g., for high efficiency WLAN. An access point (AP) may send a trigger element that allocates a resource for pre-association transmissions with the AP. The trigger element may allocate the resource for random access and/or deterministic access. The AP may receive, from an unassociated STA, a first frame via one or more resource units (RUs) allocated in the trigger element. The AP may determine a pre-association identifier (PID) that identifies the unassociated STA. The AP may send the PID to the unassociated STA, for example, in the trigger element or in the multi-STA ACK. The AP may send a second frame associated with a multi-user (MU) transmission that includes the PID. The AP may send a trigger frame that includes the PID.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: October 26, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Xiaofei Wang, Hanqing Lou, Guodong Zhang
  • Enhancements for resource allocation in WLAN systems
    Patent number: 11153908
    Abstract: A STA may comprise a receiver configured to receive an MU RTS frame transmitted to a plurality of STAs. The MU RTS frame may indicate, in a duration field, a duration of one or more frames to follow. The STA may further comprise a transmitter configured to transmit a CTS frame in response to receiving the MU RTS frame. Another frame comprising UL transmission information may be received by the STA which includes MCS indicators and allocates frequency resources for the plurality of STAs. A data frame may be modulated in accordance with an MCS indicator of the MCS indicators, and may be transmitted on frequency resources of the frequency resources allocated for the plurality of STAs. An acknowledgement frame, which acknowledges receipt of the data frame, may be received.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: October 19, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Hanqing Lou, Guodong Zhang, Xiaofei Wang, Juan Fang, Oghenekome Oteri, Pengfei Xia, Monisha Ghosh, Robert L. Olesen
  • Multi-bit read-only memory device
    Patent number: 11152060
    Abstract: Some embodiments include apparatuses having non-volatile memory cells, each of the non-volatile memory cells to store more than one bit of information; data lines, at most one of the data lines electrically coupled to each of the non-volatile memory cells; a circuit including transistors coupled to the data lines, the transistors including gates coupled to each other; and an encoder including input nodes and output nodes, the input nodes to receive input information from the data lines through the transistors, and the output nodes to provide output information having a value based on a value of the input information.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: October 19, 2021
    Assignee: Intel Corporation
    Inventors: Xiaofei Wang, Dinesh Somasekhar, Clifford Ong, Eric A Karl, Zheng Guo, Gordon Carskadon
  • Coexistence of OFDM and on-off keying (OOK) signals in WLAN
    Patent number: 11146440
    Abstract: A wireless transmit/receive unit (WTRU) or access point (AP) may generate a protocol data unit (PDU) of a first 802.11 protocol and a preamble and data of a second 802.11 protocol. The preamble and data of the second 802.11 protocol may be arranged on resources of the PDU of the first 802.11 protocol with shaping sequences for concurrent transmission.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 12, 2021
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Alphan Sahin, Oghenekome Oteri, Hanqing Lou, Xiaofei Wang, Li Hsiang Sun, Rui Yang, Frank La Sita
  • SYSTEMS AND METHODS FOR BEAMFORMING TRAINING IN WIRELESS LOCAL AREA NETWORKS
    Publication number: 20210306057
    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: June 9, 2021
    Publication date: September 30, 2021
    Inventors: Hanqing Lou, Xiaofei Wang, Oghenekome Oteri