Patents by Inventor Liwen Chu

Liwen Chu 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: 20200382998
    Abstract: Techniques for signaling new versions of a communication protocol differentiated from legacy versions of the communication protocol that are interoperable with stations implementing legacy versions of the communication protocol, that are compatible with future new versions of the communication protocol, and that do not overly complicate the receiver state machine have been disclosed.
    Type: Application
    Filed: May 22, 2020
    Publication date: December 3, 2020
    Inventors: Rui Cao, Hongyuan Zhang, Liwen Chu, Sudhir Srinivasa
  • Patent number: 10856228
    Abstract: Embodiments described herein provide a method for transmitting a wake-up radio signal to low power devices in a wireless local area network. At a wireless access point, data for transmission to one or more lower power wireless devices is received. A wake-up radio packet is generated, including a wake-up data frame destined for the one or more lower power wireless devices. The wake-up data frame is configured with: a type field indicative of a type of the wake-up data frame, and a first identifier field indicative of information corresponding to the one or more lower power wireless devices. The wake-up radio packet is transmitted to the one or more lower power wireless devices to turn on wireless receivers at the one or more low power wireless devices prior to initiating data transmission with the one or more lower power wireless devices.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: December 1, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10856349
    Abstract: A method for simultaneously communicating with multiple communication devices in a wireless local area network is described. Multiple uplink data units are received that are simultaneously transmitted by multiple second communication devices. The multiple uplink data units include a management data unit and a traffic data unit. An acknowledgment data unit is generated to acknowledge receipt of the multiple data units. The acknowledgment data unit includes (i) an indication that indicates that the acknowledgment data unit is intended for the multiple second communication devices, and (ii) respective acknowledgment information fields for the multiple second communication devices. The respective acknowledgment information fields include a first acknowledgment information field for the management data unit and a second acknowledgment information field for the traffic data unit.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: December 1, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200374801
    Abstract: A first communication device determines whether a second communication device is in a power save mode with respect to a first communication link among a plurality of communication links that correspond to respective frequency segments, and determines whether the second communication device is in a power save mode with respect to a second communication link among the plurality of communication links. The second communication device is permitted to be in the power save mode with respect to the second communication link when the second communication device is not in the power save mode with respect to the first communication link, and vice versa. The first communication device communicates with the second communication device in accordance with the power save modes of the second communication device with respect to the first and second communication links.
    Type: Application
    Filed: May 26, 2020
    Publication date: November 26, 2020
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20200374754
    Abstract: A first communication device determines whether a specific wireless local area network (WLAN) communication link, among a plurality of WLAN communication links corresponding to respective frequency segments, has been negotiated with a second communication device for a first traffic stream. In response to determining that the specific WLAN communication link has been negotiated for the first traffic stream, the first communication device transmits packets in the first traffic stream only via the specific WLAN communication link. In response to determining that no WLAN communication link has been negotiated with the second communication device for the first traffic stream, the first communication device transmits packets in the first traffic stream via multiple WLAN communication links corresponding to different frequency segments.
    Type: Application
    Filed: May 29, 2020
    Publication date: November 26, 2020
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20200374802
    Abstract: A first communication device determines whether a group-addressed frame is to be transmitted via multiple WLAN communication links. In response to determining that the group-addressed frame is to be transmitted via the multiple WLAN communication links, the first communication device i) transmits a first instance of the group-addressed frame via a first WLAN communication link, the first instance of the group-addressed frame having a sequence number set to a value, and ii) transmits a second instance of the group-addressed frame via a second WLAN communication link, the second instance of the group-addressed frame having a sequence number set to the value. In response to determining that the group-addressed frame is to be transmitted via only a single WLAN communication link, the first communication device transmits the group-addressed frame only via the single WLAN communication link.
    Type: Application
    Filed: May 29, 2020
    Publication date: November 26, 2020
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Patent number: 10849024
    Abstract: A communication device sets a first channel access timer to a first duration in which at least a first portion of a communication channel is expected to be busy, the first timer corresponding to a first one of a plurality of component channels of the communication channel. The communication device also sets a second channel access timer to a second duration in which at least a second portion of the communication channel is expected to be busy, the second timer corresponding to a second one of the plurality of component channels. The communication device counts down the first timer and the second timer. When at least one of the first timer and the second timer reaches zero, the communication device determines whether one or more of the component channels are idle, and transmits at least one signal in at least one of the component channels determined to be idle.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: November 24, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10848275
    Abstract: A first communication device generates and transmits a first communication frame corresponding to a request to participate in a block acknowledgment procedure. The first communication frame includes: a first field indicating a number of buffers requested to be allocated at a second communication device for buffering data units to be transmitted by the first communication device, and a second field indicating a first maximum bitmap length supported by the first communication device. The first communication device receives a second communication frame corresponding to a response to the first communication frame. The second communication frame includes: a third field indicating a number of buffers allocated at the second communication device for buffering the data units transmitted by the first communication device, and a fourth field indicating a second maximum bitmap length supported by the second communication device.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: November 24, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Liwen Chu, Ken Kinwah Ho, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10849080
    Abstract: A method is described. A trigger medium access control protocol data unit (MPDU) is generated at a first communication device. The trigger MPDU is configured to solicit a second communication device to transmit a trigger-based data unit to the first communication device. A transmit power indication in the trigger MPDU is set to indicate that a transmit power level of the trigger-based data unit is to be selected by the second communication device. The trigger MPDU is transmitted from the first communication device to the second communication device.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 24, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10848288
    Abstract: A first communication device prompts a plurality of second communication devices to transmit, during a contiguous time period reserved for a range measurement exchange, respective first null data packets (NDPs) at respective times. The first communication device receives first NDPs from at least some of the second communication devices during the contiguous time period, and transmits one or more second NDPs to the plurality of second communication devices. The first communication device uses reception of the first NDPs and transmission of the one or more second NDPs to determine respective ranges between the first communication device and respective second communication devices.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: November 24, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Christian R. Berger, Niranjan Grandhe, Sudhir Srinivasa, Hui-Ling Lou
  • Patent number: 10834639
    Abstract: A first communication device configured is for communication with one or more second communication devices over a communication channel. The first communication device generates a first bandwidth indication of a first bandwidth of a first channel segment of the communication channel, and generates a second bandwidth indication, separate from the first bandwidth indication, of a second bandwidth of a second channel segment of the communication channel. The first channel segment does not overlap in frequency with the second channel segment. The first communication device generates one or more media access control protocol (MAC) data units to include the first bandwidth indication and the second bandwidth indication, and transmits the one or more MAC data units to the one or more second communication devices to indicate the first bandwidth of the first channel segment and the second bandwidth of the second channel segment to the one or more second communication devices.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: November 10, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10826569
    Abstract: A first communication device allocates respective frequency sub-channels for subsequent orthogonal frequency division multiple access (OFDMA) communications with two or more second communication devices, including allocating a first frequency sub-channel, a second frequency sub-channel, and a third frequency sub-channel between the first frequency sub-channel and the second frequency sub-channel. The first communication device generates and transmits a first downlink OFDMA data unit configured to prompt the two or more second communication devices to transmit as part of a multi-user transmission that spans the first frequency sub-channel, the second frequency sub-channel, and the third frequency sub-channel. The first communication device receives an uplink OFDMA transmission and determines that the uplink OFDMA transmission did not include a transmission within the third frequency sub-channel.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: November 3, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Lei Wang, Hongyuan Zhang, Hui-Ling Lou, Yakun Sun, Jinjing Jiang
  • Patent number: 10827428
    Abstract: Embodiments described herein provide a mechanism including the configuration and use of the wakeup request (WUR) frame to announce the transmission of a management frame. Specifically, the WUR frame is configured with information indicating whether the incoming management frame includes new BSS operation information, based on which the low power device may determine whether to wake up the 802.11 WLAN receiver to receive the management frame.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: November 3, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200336254
    Abstract: Various embodiments relate to a method for transmitting hybrid automatic repeat request (HARQ) coded data by an access point, including: receiving by the access point buffered frame information from a plurality of stations; determining the HARQ coding information and resources for each of the plurality of stations; transmitting a first trigger frame including the HARQ coding information and resource information for each of the plurality of stations; receiving a first HARQ transmission from the plurality of stations; and decoding the received HARQ transmission from the plurality of stations.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 22, 2020
    Inventors: Liwen CHU, Yan ZHANG, Hongyuan ZHANG, Huiling LOU
  • Publication number: 20200336934
    Abstract: A method for transmitting a resource request for an uplink (UL) multi-user (MU) transmission is described. A High Throughput (HT) Control field that includes buffer information corresponding to media access control (MAC) protocol data units (MPDUs) that are queued for transmission by a first communication device is generated by the first communication device. The buffer information indicates a number of bytes for the MPDUs that are queued for transmission. A resource request MPDU that includes the HT Control field is generated by the first communication device. The resource request MPDU is transmitted by the first communication device to a second communication device via a wireless communication channel to request an allocation of radio resources for the UL MU transmission by the second communication device.
    Type: Application
    Filed: July 1, 2020
    Publication date: October 22, 2020
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Yakun Sun, Jinjing Jiang, Hui-ling Lou
  • Patent number: 10812244
    Abstract: A first communication device receives an uplink orthogonal frequency multiple access (OFDMA) transmission. The uplink OFDMA transmission includes respective transmissions from multiple second communication devices, and the respective transmissions from the multiple second communication devices include indications of respective acknowledgment policies corresponding to the respective transmissions from the multiple second communication devices. The first communication device generates one or more acknowledgment physical layer (PHY) data units to acknowledge at least a portion of the uplink OFDMA transmission, where the one or more acknowledgment PHY data units do not comply with at least one of the acknowledgment policies corresponding to the uplink OFDMA transmission. The first communication device transmits the one or more acknowledgment PHY data units to acknowledge the at least the portion of the uplink OFDMA transmission.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: October 20, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Liwen Chu, Lei Wang, Hongyuan Zhang, Yakun Sun, Jinjing Jiang, Hui-Ling Lou
  • Publication number: 20200328856
    Abstract: At least a portion of a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in a vehicular communication network is generated to span a first bandwidth a) based on a first orthogonal frequency division multiplexing (OFDM) numerology that is defined for a second bandwidth greater than the first bandwidth and b) down-clocked to generate the at least the portion to span the first bandwidth. The at least the portion includes a legacy portion decodable by a legacy device operating in the network. A data portion is generated based on a second OFDM numerology defined to span the second bandwidth. The PPDU is generated to include the at least the legacy portion of the PHY preamble in a first sub-band, a duplicate of the at least the portion of the preamble in a second sub-band, and the data portion that spans the second bandwidth.
    Type: Application
    Filed: April 9, 2020
    Publication date: October 15, 2020
    Inventors: Rui CAO, Hongyuan ZHANG, Liwen CHU, Prashant SHARMA
  • Publication number: 20200329444
    Abstract: A communication device determines whether simultaneous transmissions in a first frequency segment and a second frequency segment are to be synchronized in time. In response determining that simultaneous transmissions in the first frequency segment and the second frequency segment are to be synchronized in time, the communication device transmits a first packet in the first frequency segment beginning at a first time, and transmits a second packet in the second frequency segment beginning at the first time. In response to determining that simultaneous transmissions in the first frequency segment and the second frequency segment are to be unsynchronized in time, the communication device transmits a third packet in the first frequency segment beginning at a second time, and transmits a fourth packet in the second frequency segment beginning at a third time that is different than the second time.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Rui CAO, Hongyuan ZHANG, Liwen CHU, Yan ZHANG, Hui-Ling LOU
  • Patent number: 10805051
    Abstract: A single media access control (MAC) layer processor provides data to one or more baseband signal processors, which generate a plurality of baseband signals corresponding to the data provided by the MAC layer processor. The plurality of baseband signals includes at least a first baseband signal and a second baseband signal. The first baseband signal has a first frequency bandwidth and the second baseband signal has a second frequency bandwidth that is different than the first frequency bandwidth. The one or more baseband signal processors provide the plurality of baseband signals to a plurality of radio frequency (RF) radios for simultaneous wireless transmission via a plurality of RF segments.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: October 13, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Hongyuan Zhang, Liwen Chu
  • Publication number: 20200322007
    Abstract: In a method for simultaneously communicating with multiple communication devices in a wireless local area network a first communication device receives a plurality of uplink data units simultaneously transmitted by multiple second communication devices. The first communication device generates an acknowledgement data unit to acknowledge receipt of the multiple data units simultaneously transmitted by multiple second communication devices. The acknowledgement data unit includes (i) an indication that indicates that the acknowledgement data unit is intended for multiple second communication devices and (ii) respective acknowledgement information for the multiple second communication devices. The acknowledgement data unit is transmitted from the first communication device to the multiple second communication devices.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 8, 2020
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou