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: 20180324284
    Abstract: A first communication device receives, from a second communication device, a trigger frame. The first communication device generates a single-user (SU) physical layer (PHY) protocol data unit that includes a PHY protocol payload, wherein the PHY protocol payload include information other than information that acknowledges a previous transmission from the second communication device. In response to the trigger frame, the first communication device transmits the SU PHY protocol data unit to the second communication device, such that the SU PHY protocol data unit is transmitted prior to the first communication device transmitting any other PHY protocol data unit after receiving the trigger frame.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 8, 2018
    Inventors: Yakun SUN, Hongyuan ZHANG, Liwen CHU, Lei WANG
  • Patent number: 10123328
    Abstract: A communication device is configured to operate in a first wireless communication network that utilizes a communication protocol developed for use in frequency bands that are licensed by a government entity for wireless communication applications. The communication device determines whether one or more communication channels in an unlicensed frequency band are not being utilized by any second wireless communication networks, wherein the government entity does not require licenses to use the unlicensed frequency band. In response to determining that one or more communication channels in the unlicensed frequency band are not being utilized by any second wireless communication networks, the communication device selects a set of one or more communication channels in the one or more communication channels for use by the first wireless communication network, and utilizes the set of one or more communication channels for communications in the first wireless communication network.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: November 6, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Mingguang Xu, Liwen Chu, Hui-Ling Lou
  • Publication number: 20180309550
    Abstract: A method for generating a physical layer (PHY) data unit includes generating a first signal field to include multiple copies of first signal field content, wherein the first signal field content spans one sub-band of a plurality of sub-bands of the PHY data unit, and wherein the multiple copies collectively span the plurality of sub-bands of the PHY data unit; generating a second signal field to include multiple copies of second signal field content, wherein the second signal field content spans multiple ones of the plurality of sub-bands of the PHY data unit, and wherein the multiple copies of the second signal field collectively span the plurality of sub-bands of the PHY data unit; generating a preamble of the PHY data unit to include at least the first signal field and the second signal field; generating the PHY data unit to include at least the preamble.
    Type: Application
    Filed: July 2, 2018
    Publication date: October 25, 2018
    Inventors: Yakun SUN, Lei WANG, Jinjing JIANG, Liwen CHU, Hongyuan ZHANG
  • Publication number: 20180309483
    Abstract: In a method for communicating in a wireless communication network a trigger frame is generated to trigger simultaneous uplink transmissions by multiple communication devices. The trigger frame includes a padding portion having a length determined based on respective time duration requirements of the multiple communication devices, the respective time duration requirements for preparing uplink transmission by the corresponding second communication devices. The trigger frame is transmitted to the multiple communication devices. The simultaneous uplink transmissions, triggered by the trigger frame, are received from the multiple communication devices.
    Type: Application
    Filed: July 2, 2018
    Publication date: October 25, 2018
    Inventors: Liwen CHU, Yakun SUN, Hongyuan ZHANG, Lei WANG, Hui-Ling LOU
  • Publication number: 20180310273
    Abstract: A first communication device determines which one or more types of feedback information, from among a plurality of types of feedback information associated with a range measurement exchange session, a second communication device is to provide to the first communication device in a feedback packet transmitted as part of the range measurement exchange session. The first communication device transmits to the second communication device one or more indications of the determined one or more types of feedback information that the second communication device is to provide to the first communication device in the feedback packet. The first communication device performs the range measurement exchange, including receiving the feedback packet from the second communication device, wherein the feedback packet includes the determined one or more types of feedback information.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 25, 2018
    Inventors: Liwen CHU, Hongyuan ZHANG, Christian R. BERGER, Niranjan GRANDHE, Sudhir SRINIVASA, Hui-Ling LOU
  • Publication number: 20180310247
    Abstract: A first communication device transmits a first packet that includes a wakeup request packet configured to prompt a wakeup radio at a second communication device to prompt a network interface device of the second communication device to transition from a low power state to an active state. The first communication device measures a delay period after an end of transmission of the first packet. The delay period corresponds to a time required for the network interface device of the second communication device to transition from the low power state to the active state. After at least the delay period, the first communication device transmits the second packet.
    Type: Application
    Filed: April 25, 2018
    Publication date: October 25, 2018
    Inventors: Liwen CHU, Jinjing JIANG, Hua MU, Hongyuan ZHANG, Hui-Ling LOU
  • Publication number: 20180310312
    Abstract: A plurality of different OFDM tone blocks for a wireless local area network (WLAN) communication channel are assigned to a plurality of devices. An OFDMA data unit is generated, the OFDMA unit including a preamble portion and a data portion, the preamble portion having at least i) a first legacy portion that corresponds to at least a first OFDM tone block, ii) a second legacy portion that corresponds to a second OFDM tone block, iii) a first non-legacy portion that corresponds to the first OFDM tone block, iv) a second non-legacy portion that corresponds to the second OFDM tone block, and v) a third non-legacy portion that corresponds to a third OFDM tone block. The first OFDM tone block and the second OFDM tone block are separated in frequency by at least the third OFDM tone block.
    Type: Application
    Filed: June 25, 2018
    Publication date: October 25, 2018
    Inventors: Hongyuan ZHANG, Yakun SUN, Hui-Ling LOU, Liwen CHU
  • Patent number: 10111185
    Abstract: A communication device receives a signal during a backoff period of a backoff procedure, wherein the communication device is part of a first communication network. In response to determining that i) the signal is valid, ii) the signal is from another communication network, and iii) the power level of the signal does not meet a threshold that is higher than a default threshold, the communication device continues a count of a backoff timer during reception of the signal. In connection with comparing the power level of the signal to the threshold higher than the default threshold, the communication device sets a transmit power level to a reduced power level that is lower than a default power level. The communication device transmits at a transmit power level that is less than or equal to the reduced transmit power level in response to the backoff timer expiring.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: October 23, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Yakun Sun, Hui-Ling Lou
  • Publication number: 20180302847
    Abstract: A first communication device generates and transmits to a second communication device: first and second information elements that respectively indicate capabilities regarding physical layer protocol data units (PPDUs) conforming to a first communication protocol and a second communication protocol. The first communication device generates and transmits a MAC data unit that includes a number corresponding to a maximum number spatial streams supported by the first communication device. The number in the MAC data unit, and one or more of i) the first information element, ii) the second information element, and iii) other information in the MAC data unit, indicate first and second maximum numbers of spatial streams supported by the first communication device with respect to PPDUs conforming to the first communication protocol, and PPDUs conforming to the second communication protocol, respectively.
    Type: Application
    Filed: April 17, 2018
    Publication date: October 18, 2018
    Inventors: Liwen CHU, Ken Kinwah HO, Tianan Tim MA, Hongyuan ZHANG, Hui-Ling LOU
  • Patent number: 10103923
    Abstract: A first communication device receives sounding feedback packets from a plurality of second communication devices in a group of second communication devices for OFDMA communication. Each sounding feedback packet includes beamforming feedback information to be used by the first communication device for beamforming to the corresponding second communication device, and one or more quality indicators corresponding to one or more sub-channel blocks of an orthogonal frequency division multiplexing (OFDM) communication channel associated with the corresponding second communication device. Respective sub-channel blocks are allocated based on the quality indicators, to respective ones of the second communication devices in the group. The first communication device transmits an OFDMA data unit that includes respective OFDM data units directed to respective ones of the second communication devices in the group.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: October 16, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu
  • Publication number: 20180292518
    Abstract: During a service period (SP) for a ranging measurement signal exchange between a first communication device and one or more second communication devices, the first communication device receives respective first null data packets (NDPs) from the one or more second communication devices, and transmits respective second NDPs to the one or more second communication devices. The first communication device transmits, during the SP, respective first ranging measurement feedback packets to the one or more second communication devices to allow each of the one or more second communication devices to determine a time-of-flight between the first communication device and the second communication device and/or receives, during the SP, respective second ranging measurement feedback packets from the one or more second communication devices to allow the first communication device to determine respective times-of-flight between the first communication device and the one or more second communication devices.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 11, 2018
    Inventors: Liwen CHU, Sagar TAMHANE, Hongyuan ZHANG, Christian BERGER, Niranjan GRANDHE, Sudhir SRINIVASA, Hui-Ling LOU
  • Patent number: 10098119
    Abstract: A first communication device generates a multi-user (MU) physical layer (PHY) data unit having independent data for multiple second communication devices. The first communication device also generates respective control frames to prompt second communication devices to transmit an orthogonal frequency division multiple access (OFDMA) PHY data unit to acknowledge that the second communication devices received the MU PHY data unit. The MU PHY data unit and the respective control frames are transmitted to the multiple second communication devices. The first communication device receives the OFDMA PHY data unit from at least some of the second communication devices. The first communication device processes the OFDMA PHY data unit to determine whether the multiple second communication devices received the MU PHY data unit.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: October 9, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Hui-Ling Lou, Jinjing Jiang
  • Publication number: 20180288769
    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: Application
    Filed: June 4, 2018
    Publication date: October 4, 2018
    Inventors: Liwen CHU, Hongyuan ZHANG, Lei WANG, Hui-Ling LOU, Jinjing JIANG
  • Patent number: 10090969
    Abstract: Aspects of the disclosure provide an apparatus that includes a transceiver circuit and a processing circuit. The transceiver circuit is configured to receive a trigger signal this is transmitted by another apparatus. The trigger signal triggers transmissions by a first group of apparatuses including the apparatus, and defers transmissions by a second group of apparatuses that interfere the transmissions by the first group of apparatuses. The processing circuit is configured to, in response to the trigger signal, generate a frame with a first preamble structure that is different from a second preamble structure that is used by the second group of apparatuses, and provide the generated frame to the transceiver circuit for transmission.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: October 2, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Lei Wang, Jinjing Jiang, Rui Cao, Yan Zhang
  • Patent number: 10082557
    Abstract: A first communication device receives a packet that includes scheduling information for a range measurement signal exchange session between a second communication device and a third communication device. The first communication device determines when the range measurement signal exchange session will occur using the scheduling information in the packet, and observes the range measurement signal exchange session. The first communication device performs an initial analysis of the range measurement packets by analyzing transmitter addresses in the range measurement packets to determine whether to further process the range measurement packets for range measurement purposes, and determines range measurements based on observing the one range measurement signal exchange session.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: September 25, 2018
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Sagar A. Tamhane, Hongyuan Zhang, Hui-Ling Lou, Kwok Shum Au
  • Publication number: 20180270826
    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: Application
    Filed: May 18, 2018
    Publication date: September 20, 2018
    Inventors: Hongyuan ZHANG, Yakun SUN, Hui-Ling LOU, Liwen CHU
  • Patent number: 10079628
    Abstract: A physical layer (PHY) preamble of a multi-user (MU) PHY data unit is generated. The PHY preamble is generated to include formatting information regarding the MU PHY data unit, including a field to be transmitted within a first individual communication channel among a plurality of individual communication channels that collectively span a bandwidth of a composite channel, each individual communication channel including a plurality of basic resource allocation (RA) units that collectively span a bandwidth of the individual communication channel. The field is generated to indicate one or more groupings of basic RA units, wherein at least one of the one or more groupings of basic RA which includes basic RA units of one or more other individual communication channels. A data portion of the MU PHY data unit is generated according to the formatting information in the PHY preamble, and the MU PHY data unit is generated to include the PHY preamble and the data portion.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: September 18, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Lei Wang, Jinjing Jiang
  • Patent number: 10080222
    Abstract: A method for transmitting an orthogonal frequency division multiple access (OFDMA) data unit is described. Respective sub-channels of an orthogonal frequency division multiplexing (OFDM) communication channel are allocated to first and second communication devices for simultaneous OFDM transmission. A first sub-channel is allocated to the first communication device and a second sub-channel is allocated to the second communication device. Indications of the respective allocated sub-channels are transmitted to the first and second communication devices. A medium access control (MAC) protocol data unit (MPDU) is generated that omits i) a MAC address of a transmitter, and ii) a MAC address of the first communication device. An OFDMA data unit including the MPDU is transmitted by the transmitter via the first sub-channel to the first communication device.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: September 18, 2018
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Jinjing Jiang, Hui-Ling Lou
  • Publication number: 20180262951
    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 (EMDG) for data segmentation and reassembly. When both devices have EMDG 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: March 9, 2018
    Publication date: September 13, 2018
    Inventors: Jinjin Jiang, Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10075318
    Abstract: A first communication device receives sounding feedback packets from a plurality of second communication devices, wherein each sounding feedback packet includes one or more channel quality indicators (CQIs) corresponding to one or more groups of orthogonal frequency division multiplexing (OFDM) subcarriers associated with the corresponding second communication device. The first communication device selects a group of second communications devices, based on the received one or more CQIs, for orthogonal frequency division multiple access (OFDMA) communication. The first communication device transmits at least one OFDMA data unit that includes respective data directed to two or more second communication devices of the group, where the respective data are transmitted via respective groups of subcarriers that were allocated to the two or more second communication devices of the group by the first communication device using the received CQIs.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: September 11, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu