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).

  • Patent number: 10492221
    Abstract: A first communication device receives a data unit transmitted by the second communication device. The data unit includes a basic service set (BSS) indicator, the BSS indicator indicating a BSS associated with the second communication device and a duration indicator, the duration indicator indicative of a duration of time for which a shared communication medium is expected to be busy. The first communication device sets a channel access counter based on the duration of time indicated by the duration indicator. The first communication device associates the channel access counter with the BSS indicated by the BSS indicator.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: November 26, 2019
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Lei Wang, Hongyuan Zhang, Jinjing Jiang, Yakun Sun, Hui-Ling Lou
  • Patent number: 10484980
    Abstract: Systems, devices, and techniques relating to a link layer service platform (LSP) that provides, among other things, assisted multi-band wireless communications are described. A described device includes a first radio to transmit and receive based on a first wireless protocol; a second radio to transmit and receive based on a second wireless protocol, the second wireless protocol being different from the first wireless protocol; and a controller to use the first radio to assist communications via the second radio. The controller can be configured to cause the first radio to transmit, receive, or both one or more control frames associated with the second wireless protocol using the first wireless protocol, and cause the second radio to transmit or receive one or more data frames using the second wireless protocol in accordance with the one or more control frames.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: November 19, 2019
    Assignee: Marvell International Ltd.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20190349930
    Abstract: A communication device determines an overall bandwidth of an operating channel for a wireless local area network (WLAN), where the overall bandwidth spans a plurality of sub-channels.
    Type: Application
    Filed: April 30, 2019
    Publication date: November 14, 2019
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20190349150
    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 configure a field within a data unit for buffer information report, determine a first scale factor for scaling a first value indicative of buffered traffic of a first category, and a second scale factor for scaling a second value indicative of buffered traffic of a category, configure the field to include the first scale factor with the first value and the second scale factor with the second value, and provide the data unit to the transceiver for transmitting to another apparatus that allocates resources for transmission between the two apparatuses.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 14, 2019
    Applicant: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10477452
    Abstract: The present disclosure proposes systems and methods for performing spatial reuse using the following techniques at access points and stations. More specifically, the present disclosure relates to spatial reuse of medium with a spatial reuse opportunity announcement provided to STAs by an AP, opportunistic directional sensing performed by STAs, and a channel access method with a new backoff procedure performed by the STAs. An AP may provision a spatial reuse opportunity announcement in a beacon interval, and STAs may perform opportunistic directional sensing based on the announcement and perform channel access after performing opportunistic directional sensing.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: November 12, 2019
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10469210
    Abstract: A method for acknowledging a first medium access control (MAC) service data unit (MSDU) is described. A first aggregate MAC protocol data unit (A-MPDU) of a first orthogonal frequency division multiple access (OFDMA) data unit is received at a first communication device from a second communication device. The first A-MPDU includes a first fragment of a plurality of fragments of the first MSDU. A second A-MPDU of a second OFDMA data unit is received at the first communication device from the second communication device. The second A-MPDU includes a second fragment of the plurality of fragments and the second fragment is an end fragment of the plurality of fragments. A fragment acknowledgment data unit is generated by the first communication device to acknowledge receipt of each of the plurality of fragments of the first MSDU. The fragment acknowledgment data unit is caused to be transmitted to the second communication device.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: November 5, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10470185
    Abstract: A first communication device generates respective media access control (MAC) protocol data units (MPDUs) that include respective data for a respective second communication devices, and determines respective resource units (RUs) via which at least some of the second communication devices are to transmit as part of an uplink (UL) orthogonal frequency division multiple access (OFDMA) physical layer (PHY) transmission to respectively acknowledge receipt of the respective MPDUs. The first communication device generates respective control frames that are configured to prompt the at least some of the second communication devices to transmit the UL OFDMA PHY transmission, and that include indicators of the RUs via which the at least some of the second communication devices are to transmit as part of the UL OFDMA PHY transmission. The first communication device generates and transmits a single multi user (MU) PHY data unit that includes i) the MPDUs, and ii) the control frames.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: November 5, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Hui-Ling Lou, Jinjing Jiang
  • Patent number: 10454626
    Abstract: A first medium access control (MAC) service data unit (MSDU), intended for a communication device of multiple communication devices, is divided into a plurality of fragments. First and second groups of MAC protocol data units (MPDUs) intended for the multiple communication devices are generated and one or more transceivers are controlled to transmit first and second orthogonal frequency division multiple access data units that include the first and second groups, respectively, to the multiple communication devices. The first group includes a first MPDU that includes a first fragment of the plurality of fragments and is an only MPDU of the first group intended for the communication device. The second group includes a second MPDU that includes the first MSDU in its entirety and is included in the second group in response to determining that the first fragment was not properly received and/or decoded by the communication device.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: October 22, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10454798
    Abstract: A method for adjusting an arrival time of a first orthogonal frequency division multiplex (OFDM) data unit of an uplink multi-user (MU) data unit is described. Respective round trip times (RTTs) are determined by a first communication device for multiple communication devices that communicate with the first communication device. A first time offset for a second communication device of the multiple communication devices is determined by the first communication device based on the respective RTTs. The first OFDM data unit is to be transmitted by the second communication device. A first timing control message that indicates the first time offset is generated by the first communication device. The first timing control message is caused by the first communication device to be transmitted to the second communication device.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: October 22, 2019
    Assignee: Marvell International Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Sudhir Srinivasa
  • Publication number: 20190313404
    Abstract: An access point generates a trigger frame to trigger an uplink multi-user (MU) transmission by multiple client stations. The access point generates the trigger frame to include a common information field and multiple per-station information fields. The access point generates the common information field to include (i) a subfield that indicates a bandwidth of the uplink MU transmission, and (ii) information that indicates a guard interval and a long training field (LTF) mode to be used by the multiple client stations for the uplink MU transmission, and generates each per-station field to include respective frequency allocation information that indicates respective frequency resources to be used by the respective client station for the uplink MU transmission. The access point transmits the trigger frame to the multiple client stations to trigger the uplink MU transmission by the multiple client stations.
    Type: Application
    Filed: June 21, 2019
    Publication date: October 10, 2019
    Inventors: Liwen CHU, Yakun Sun, Hongyuan Zhang, Lei Wang, Jinjing Jiang, Hui-Ling Lou
  • Patent number: 10440598
    Abstract: A first communication device generates a range measurement packet (or a packet that includes a probe response frame, a TIM frame, etc.) associated with a range measurement signal exchange session between the first communication device and a second communication device. The first communication device records a time value of a first timer corresponding to a time of transmission of the packet, and includes timing information corresponding to the recorded time value in the packet. The first communication device transmits the packet to the second communication device. The timing information in the packet is useable by a third communication device to adjust time values corresponding to a second timer, which the third communication device includes.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 8, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Sagar Tamhane, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20190306824
    Abstract: A communication device determines an identifier of a wireless network with which the communication device is not associated. While the communication device is not associated with the wireless network, the communication device participates in a ranging procedure with an access point (AP) of the wireless network. The ranging procedure is for estimating a distance between the communication device and the AP based on measuring times of flight of transmissions between the communication device and the AP. Participating in the ranging procedure includes: the communication device transmitting a packet to the AP as part of the ranging procedure. The packet includes a PHY preamble, and the PHY preamble includes a signal field. The signal field includes a wireless network identifier subfield set to the identifier of the wireless network.
    Type: Application
    Filed: July 31, 2018
    Publication date: October 3, 2019
    Inventors: Liwen CHU, Christian BERGER, Niranjan GRANDHE, Hongyuan ZHANG, Hui-Ling LOU
  • Patent number: 10433309
    Abstract: A communication device assigns i) a first orthogonal frequency division multiplex (OFDM) tone block for a communication channel to a first communication device, and ii) a second OFDM tone block to a second communication device. The first OFDM tone block and the second OFDM block each span less than or equal to 10 MHz, and are both within a subchannel that spans a 20 MHz. The communication device generates an orthogonal frequency division multiple access (OFDMA) physical layer (PHY) data unit for transmission in the communication channel. The OFDMA PHY data unit is generated to include: a legacy preamble portion having legacy signal field that spans the subchannel; and a data portion that includes i) first data for the first communication device modulated to the first OFDM tone block, and second data for the second communication device modulated to the second OFDM tone block.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: October 1, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu
  • Patent number: 10425908
    Abstract: The present disclosure describes methods and apparatus for enabling spontaneous location determination in a scheduled wireless communication environment. For example embodiments, a first wireless communication device includes a transceiver and a multiple recipient communication system. The transceiver is configured to receive from a second wireless communication device a request to participate in a location determination procedure (LDP) that is to occur at least partially during a communication period that is assigned to a third wireless communication device. The multiple recipient communication system is configured to generate a multiple recipient frame that encapsulates (i) data that is destined for the third wireless communication device and (ii) a response to the request to participate in the LDP.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: September 24, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Sagar A. Tamhane, Sarang Shrikrishna Wagholikar, Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20190288798
    Abstract: A first communication device generates a media access control (MAC) frame that includes an indication of a change in a block acknowledgment (BA) session that was previously established between the first communication device and a second communication device. The first communication device transmits the MAC frame to the second communication device. The MAC frame is configured to cause the second communication device to adopt the change in the BA session in response to receiving the MAC frame.
    Type: Application
    Filed: July 31, 2018
    Publication date: September 19, 2019
    Inventors: Jinjing JIANG, Liwen CHU, Yi-Ling CHAO, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20190289495
    Abstract: A first communication device receives one or more aggregate medium access control (MAC) data units from respective one or more second communication devices, and generates one or more acknowledgement information fields. A first acknowledgement information field corresponds to a particular second communication device and includes a length indication that indicates a length of an acknowledgement field and the acknowledgment field of the indicated length. The length of the acknowledgement field is selected from a subset of predetermined lengths, among a set of predetermined lengths, the subset including multiple predetermined lengths that do not exceed a buffer size determined based on an acknowledgement setup procedure previously conducted between the first communication device and the particular second communication device.
    Type: Application
    Filed: June 3, 2019
    Publication date: September 19, 2019
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20190289548
    Abstract: Embodiments described herein provide a method for creating a low power wake-up radio frame. The method comprises generating, at an access point, a wake-up radio frame for transmission to one or more client stations, determining whether the wake-up radio frame is to be transmitted inside or outside a basic service set associated with the access point, the basic service set having a basic service set identifier that is used to identify the access point. And in response to determining that the wake-up radio frame is to be transmitted outside the basic service set, computing, a target frame check sequence for the wake-up radio frame without using the basic service set identifier associated with the basic service set, appending the target frame check sequence to the wake-up radio frame; and transmitting, to one or more client stations, the wake-up radio frame with the appended target frame check sequence.
    Type: Application
    Filed: January 31, 2019
    Publication date: September 19, 2019
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20190280831
    Abstract: A client station of a wireless local area network (WLAN) determines respective availabilities at the client station of a plurality of subchannels for a multi-user (MU) transmission, and generates a media access control (MAC) data unit (MPDU) that includes a MAC header. The MAC header includes a control field, and the control field includes a subfield having i) an identification (ID) that indicates the subfield includes subchannel availability information, and ii) a bitmap that indicates the respective availabilities at the client station of the plurality of subchannels. The client station transmits the MPDU to an access point of the WLAN for a subsequent allocation by the access point of wireless bandwidth for the MU transmission.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Inventors: Liwen CHU, Lei WANG, Jinjing JIANG, Hongyuan ZHANG, Yakun SUN, Hui-Ling LOU
  • Publication number: 20190281658
    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: May 23, 2019
    Publication date: September 12, 2019
    Applicant: Marvell International Ltd.
    Inventors: Lei Wang, Liwen Chu, Jinjin Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10404653
    Abstract: A communication device of a first wireless network determines that a first value of a first basic service set (BSS) color identifier is the same as a value of a second BSS color identifier corresponding to a neighboring second wireless network. In response, the communication device determines a second value of the first BSS color identifier. The communication device transmits one or more packets that each include i) an indication that the first BSS color identifier is changing, ii) the second value of the first BSS color identifier, and iii) a respective integer number of remaining beacon intervals corresponding to a start time when the second value of the first BSS color identifier will supersede the first value of the first BSS color identifier. Based on the start time, the communication device begins to use the second value of the first BSS color identifier with communications in the first wireless network.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: September 3, 2019
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Jinjing Jiang, Hui-Ling Lou