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: 20200244784
    Abstract: A communication device is configured to process packets that conform to a first physical layer (PHY) protocol for wireless vehicular communications and packets that conform to a second PHY protocol for wireless vehicular communications. The communication device determines whether a broadcast frame is to be transmitted within a first packet that conforms to the first PHY protocol or within a second packet that conforms to the second PHY protocol. In response to determining that the broadcast frame is to be transmitted within the first packet that conforms to the first PHY protocol, the communication device transmits the broadcast frame within the first packet that conforms to the first PHY protocol. In response to determining that the broadcast frame is to be transmitted within the second packet that conforms to the second PHY protocol, the communication device transmits the broadcast frame within the second packet that conforms to the second PHY protocol.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Inventors: Liwen CHU, Hongyuan ZHANG
  • Patent number: 10727912
    Abstract: A communication device of a client uplink group transmits an enhanced request to send (E-RTS) message to an access point of a wireless local area network, wherein the E-RTS message includes i) a length of a TXOP of the communication device and ii) an indication of a data unit size for an uplink MU-MIMO data unit to be transmitted by the communication device simultaneously with transmissions of other members of the client uplink group. The communication device receives a communication frame from the access point, the communication frame including a prompt to transmit an uplink MU-MIMO data unit having the indicated data unit size. The communication device generates the uplink MU-MIMO data unit having the indicated data unit size, and transmits, in response to the communication frame, the uplink MU-MIMO data unit to the access point during the TXOP simultaneously with transmissions of other members of the client uplink group.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: July 28, 2020
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10721026
    Abstract: A first communication device generates a block acknowledgement (BA) frame that includes (i) acknowledgement information to indicate, to a second communication device, whether the first communication device successfully received multiple media access control (MAC) frames transmitted by the second communication device, and (ii) an indication of a change in a BA session between the first communication device and the second communication device. The first communication device transmits the BA frame to the second communication device, where the BA frame causes the second communication device to adopt the change in the BA session in response to receiving the BA frame.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: July 21, 2020
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Jinjing Jiang, Liwen Chu, Yi-Ling Chao, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200229214
    Abstract: A method for wireless local area network (WLAN) communication by a first WLAN communication device is described. A first media access control (MAC) data unit is generated at the first WLAN communication device. The first MAC data unit is transmitted from the first WLAN communication device to a second WLAN communication device via a first WLAN communication channel having a first radio frequency (RF) bandwidth. A second MAC data unit is received at the first WLAN communication device from the second WLAN communication device via a second WLAN communication channel having a second RF bandwidth that does not overlap the first RF bandwidth. The second MAC data unit corresponds to an acknowledgment of the first MAC data unit from the second WLAN communication device.
    Type: Application
    Filed: April 30, 2019
    Publication date: July 16, 2020
    Inventors: Hongyuan ZHANG, Liwen CHU
  • Publication number: 20200228379
    Abstract: A first communication device transmits a null data packet (NDP) to multiple second communication devices. The NDP spans a channel frequency bandwidth. The first communication device receives a plurality of sounding feedback packets from the second communication devices. Each sounding feedback packet includes one or more signal-to-noise ratio (SNR) indicators corresponding to one or more respective groups of orthogonal frequency division multiplexing (OFDM) subcarriers, and the SNR indicators correspond to reception of the NDP at the plurality of second communication devices. Each sounding feedback packet in the plurality of sounding feedback packets includes a respective indication of OFDM subcarriers for which the sounding feedback packet includes SNR information, and at least one sounding feedback packet from among the plurality of sounding feedback packets does not include SNR information for all OFDM subcarriers via which the NDP was transmitted.
    Type: Application
    Filed: December 16, 2019
    Publication date: July 16, 2020
    Inventors: Hongyuan ZHANG, Yakun SUN, Hui-Ling LOU, Liwen CHU
  • Patent number: 10712422
    Abstract: A first communication device transmits a first physical layer protocol data units (PPDU) that includes a first null data packet announcement (NDPA) frame as part of a first ranging measurement exchange. The first communication device transmits a first null data packet (NDP) as part of the first ranging measurement exchange, and records a transmit time of the first NDP. The first communication device determines whether a second NDP was received correctly from a second communication device as part of the first ranging measurement exchange. In response to determining that the second NDP was not received correctly, the first communication device commences a second ranging measurement exchange, including transmitting a second PPDU that includes a second NDPA frame as part of the second ranging measurement exchange.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: July 14, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10708892
    Abstract: A client station generates a media access control (MAC) data unit (MPDU) that includes a MAC header. The MAC header is generated to include a control field that indicates an amount of data queued at the client station for transmission to an access point. The control field is generated to include i) a first subfield that specifies a scale factor, and ii) a second subfield that specifies a base value, and multiplying the specified base value by the specified scale factor indicates the amount of data queued at the client station. The client station transmits the MPDU to the access point to inform the access point of the amount of data queued at the client station for transmission to the access point.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: July 7, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Yakun Sun, Jinjing Jiang, Hui-Ling Lou
  • Patent number: 10707928
    Abstract: A first communication device receives plurality of uplink data units simultaneously transmitted by multiple second communication devices, and generates an acknowledgement data unit to acknowledge receipt of the plurality of uplink data units. Each of at least some of a plurality of acknowledgment fields includes: a first field that includes an indicator of a corresponding one of the second communication devices, a second field that indicates whether the acknowledgment field corresponds to i) an acknowledgment corresponding to a single data unit, or ii) a block acknowledgment corresponding to multiple data units, wherein when the second field that indicates a block acknowledgment, the acknowledgment field further includes a third field having a bitmap that indicates which data units in the group are being acknowledged, and wherein when the second field that indicates acknowledgment of a single data unit, the acknowledgment field does not include the third field.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: July 7, 2020
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200214033
    Abstract: A communication device determines, in connection with a prior uplink multi-user (UL MU) communication in which the communication device participated, whether the communication device is to use one or more first channel access parameters, or one or more second channel access parameters for accessing a communication medium for a single user (SU) transmission by the communication device, where using the one or more first channel access parameters is associated with a greater probability of obtaining access to the communication medium as compared to using the one or more second channel access parameters. Depending on the determination made, the communication device uses the one or more first channel access parameters, or the one or more second channel access parameters to attempt to access the communication medium. In response to accessing the communication medium, the communication device transmits the SU transmission via the communication medium.
    Type: Application
    Filed: February 17, 2020
    Publication date: July 2, 2020
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Huiling Lou
  • Publication number: 20200204386
    Abstract: The present disclosure includes systems and techniques relating to broadcast and multicast in a wireless communication system. In some implementations, an announcement frame indicating a broadcast or multicast service period to multiple second wireless devices is transmitted by a first wireless device. The announcement frame indicates (i) an end time of the broadcast or multicast service period and (ii) an order of a sequence of frames to be directed to the multiple second wireless devices. Each of the sequence of frames is transmitted at the first wireless device using a directional antenna pattern to a respective one of the multiple second wireless devices, according to the order of the sequence of frames indicated in the announcement frame. An acknowledgement frame in response to the each of the sequence of frames is received at the first wireless device from the respective one of the multiple second wireless devices.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Huiling Lou
  • Patent number: 10694523
    Abstract: A first communication device in a first wireless network determines a transmit power for transmitting a first packet during a spatial reuse opportunity corresponding to a transmission in a second wireless network. Determining the transmit power includes using a spatial reuse parameter, indicative of an acceptable interference level in the second wireless network, included in a second packet transmitted by a second communication device in the second wireless network. The first communication device generates the first packet to include information to indicate to a third communication device, that is an intended receiver of the first packet, to not transmit an acknowledgment of the first packet according to a normal acknowledgment procedure during the spatial reuse opportunity.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: June 23, 2020
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10694546
    Abstract: A first communication device receives an indication that a second communication device permits a duplex transmission while the second communication device transmits during a transmit opportunity period (TXOP), where duplex transmissions involve simultaneously transmitting and receiving via a same wireless frequency band. The indication is included in a media access control layer (MAC) protocol data unit (MPDU). In response to receiving the indication that the second communication device permits the duplex transmission, the first communication device determines that the first communication device is permitted to perform the duplex transmission during the TXOP. The first communication device receives a first packet from the second communication device during the TXOP, and transmits a second packet while the first communication device is receiving the first packet.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: June 23, 2020
    Assignee: NXP USA, Inc.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200196385
    Abstract: Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to detect an error of a previous scheduled transmission of data units from the apparatus to another apparatus. The other apparatus provides scheduled resources for transmission between the two apparatuses. Further, the processing circuit is configured to determine resources that are scheduled by the other apparatus for the apparatus to perform retransmission, and provide one or more of the data units in the previous scheduled transmission to the transceiver for retransmission using the scheduled resources.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 18, 2020
    Inventors: Lei Wang, Liwen Chu, Jinjin Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200196221
    Abstract: An access point (AP) device determines a set of basic service set identifiers (BSSIDs). Each BSSID includes a same group of most significant bits (MSBs) and a different group of n least significant bits (LSBs). The AP device assigns respective BSSIDs from the set of BSSIDs to multiple virtual APs. and designates one of the assigned BSSIDs as a reference BSSID that corresponds to a transmitter address (TA) for frames intended for client stations associated with more than one virtual AP. The AP device generates and transmits a management frame that includes i) a header with a TA field set to one of the assigned BSSIDs, and ii) a frame body with a plurality of fields that includes a) a first field set to n, and b) a second field set to the n LSBs of the reference BSSID. The TA field, the first field, and the second field in the management frame indicate the reference BSSID to a client station that receives the management frame.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 18, 2020
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Yakun Sun, Huiling Lou
  • Publication number: 20200187052
    Abstract: Embodiments described herein provide a method for fragmenting and reassembling data frames on a medium access control (MAC) layer in a wireless local area network. A datagram is received from an application running on a first network device, for transmission over a wireless communication link in the wireless local area network. A negotiation request is initiated with a second network device for determining whether both the first network device and the second network device have enhanced directional multi-gigabit capability (EDMG) for data segmentation and reassembly. When both devices have EDMG capability and the size of the datagram exceeds the maximum size defined by the wireless local area network transmission protocol, the datagram is segmented into a plurality of transmission data units on the MAC layer.
    Type: Application
    Filed: February 17, 2020
    Publication date: June 11, 2020
    Inventors: Jinjing Jiang, Liwen Chu, Hongyuan Zhang, Huiling Lou
  • Patent number: 10681578
    Abstract: A first wireless communication device includes a timing module to provide a timing synchronization function (TSF) time. A fine timing measurement module is to transmit a first request to perform a fine timing measurement to determine a distance between the first wireless communication device and a second wireless communication device. The first request includes a first value of the TSF time at which to start a burst period of the fine timing measurement, and the first value is determined in accordance with the TSF time provided by the timing module. The fine timing measurement module is further to receive a first response as transmitted from the second wireless communication device in response to the first request and transmit a second request to start the burst period at a TSF time indicated by the first value. The first response includes the first value of the TSF time.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: June 9, 2020
    Assignee: Marvell Asia Pte., Ltd.
    Inventors: Liwen Chu, Sagar A. Tamhane, Sarang Shrikrishna Wagholikar, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10681625
    Abstract: In aspects of acknowledgement options for downlink multi-user transmission, a wireless network system includes an access point that can communicate a downlink multi-user transmission soliciting acknowledgement from one or more station devices. The access point can receive an association request or an operation mode change request frame from one or more of the station devices, and determine an acknowledgement option for each of the station devices that communicate the request to the access point. The access point can then use a multi-user transmission mode or a single user transmission mode for each of the station devices based on the acknowledgement option determined for each of the respective station devices.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: June 9, 2020
    Assignee: Marvell International Ltd.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang
  • Patent number: 10673547
    Abstract: Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to determine a transmission parameter adjustment for the transceiver, detect that the transmission parameter adjustment has a potential to cause a collision to an overlapping basic service set (OBSS), adjust timings for transmission control to avoid the collision, and control the transceiver based on the determined transmission parameter adjustment and the adjusted timings for transmission control.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: June 2, 2020
    Assignee: NXP USA, Inc.
    Inventors: Liwen Chu, Lei Wang, Jinjin Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10667175
    Abstract: Embodiments described herein provide a method for fragmenting and reassembling data frames on a medium access control (MAC) layer in a wireless local area network. A datagram is received from an application running on a first network device, for transmission over a wireless communication link in the wireless local area network. A negotiation request is initiated with a second network device for determining whether both the first network device and the second network device have enhanced directional multi-gigabit capability (EDMG) for data segmentation and reassembly. When both devices have EDMG capability and the size of the datagram exceeds the maximum size defined by the wireless local area network transmission protocol, the datagram is segmented into a plurality of transmission data units on the MAC layer.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: May 26, 2020
    Assignee: NXP USA, Inc.
    Inventors: Jinjing Jiang, Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20200162964
    Abstract: A method for data transmission in a wireless local area network (WLAN). The method includes receiving, in a physical layer (PHY) interface of a first node in the WLAN, data for transmission over the WLAN. The received data are divided in the PHY interface into a sequence of data blocks having respective lengths, and encoding the data blocks using an error correcting code (ECC). The encoded data blocks are encapsulated in a PHY protocol data unit (PPDU) together with encoding metadata including at least an indication of the respective lengths of the data blocks. The PPDU is transmitted over the WLAN from the first node to a second node in the WLAN.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 21, 2020
    Inventors: Sudhir Srinivasa, Hongyuan Zhang, Yan Zhang, Rui Cao, Liwen Chu