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: 10045340
    Abstract: A method is carried out on a device capable of utilizing a high efficiency wireless local area network (HEW) communication protocol and a legacy communication protocol, and includes wirelessly receiving a communication frame; when the measured energy level of the frame exceeds a static clear channel assessment (CCA) energy level, identifying the BSS to which the frame corresponds, wherein identifying the BSS to which the frame corresponds comprises utilizing a BSS identifier included in the frame when the frame is an HEW frame or utilizing a MAC address included in the frame when the frame is a legacy frame; when the frame corresponds to the same BSS as the device, processing the frame utilizing the static CCA energy level; and when the frame corresponds to an overlapping OBSS, processing the frame utilizing a dynamic CCA energy level.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: August 7, 2018
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10034227
    Abstract: In aspects of access point association using trigger-based uplink single user transmission, a wireless network system includes a station device that detects an initial trigger frame communicated in the wireless network system, and the station device can communicate an association request to an access point to join the wireless network system. The access point can receive the association request from the station device and generate an association response as an acknowledgement to the association request. The acknowledgement aggregates an association response frame that includes an association identifier for the station device and a unicast trigger frame to initiate a trigger-based uplink single user (UL-SU) transmission from the station device. The access point can then communicate the acknowledgement to the station device.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: July 24, 2018
    Assignee: Marvell International Ltd.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10027449
    Abstract: A first signal field to be included in a preamble of a physical layer (PHY) data unit is generated. The first signal field includes formatting information for a second signal field to be included in the PHY data unit. The formatting information includes an indication of a number of orthogonal frequency division multiplexing (OFDM) symbols in the second signal field. The second signal field is generated according to the formatting information in the first signal field. The second signal field includes formatting information for a data portion of the PHY data unit. The data portion is generated according to the formatting information in the second signal field. The preamble is generated to include at least the first signal field and the second signal field, The PHY data unit is generated to include the preamble and the data portion.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: July 17, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Lei Wang, Jinjing Jiang, Mingguang Xu
  • Publication number: 20180198494
    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: Application
    Filed: March 5, 2018
    Publication date: July 12, 2018
    Inventors: Liwen Chu, Lei Wang, Hongyuan Zhang, Hui-Ling Lou, Yakun Sun, Jinjing Jiang
  • Publication number: 20180199272
    Abstract: In a wireless communication network that operates according to a communication protocol that defines one or more first transmission modes that provide extended range communications as compared to one or second transmission modes defined by the communication protocol, a communication device generates a communication frame that includes information indicating that the one or more first transmission modes should not be used when transmitting in the wireless communication network. The communication device transmits the communication frame to instruct one or more other communication devices in the wireless communication network to not use the one or more first transmission modes when transmitting in the wireless communication network.
    Type: Application
    Filed: January 9, 2018
    Publication date: July 12, 2018
    Inventors: Liwen CHU, Ken Kinwah HO, Jinjing JIANG, Hongyuan ZHANG, Hui-Ling LOU
  • Patent number: 10021224
    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: Grant
    Filed: December 7, 2016
    Date of Patent: July 10, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Liwen Chu, Lei Wang
  • Patent number: 10014992
    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: Grant
    Filed: September 13, 2017
    Date of Patent: July 3, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Lei Wang, Jinjing Jiang, Liwen Chu, Hongyuan Zhang
  • Patent number: 10014917
    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: Grant
    Filed: December 15, 2016
    Date of Patent: July 3, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Yakun Sun, Hongyuan Zhang, Lei Wang, Hui-Ling Lou
  • Patent number: 10009922
    Abstract: An high efficiency wireless local area network access point including a channel access module and a scheduling module. The channel access module accesses a channel of an unlicensed frequency band, which includes a plurality of subchannels. The scheduling module generates a schedule for a plurality of high efficiency wireless local area network client stations to transmit data to the access point via the channel of the unlicensed frequency band. The schedule includes information for the plurality of client stations regarding (i) a time slot in which to access the channel without contention to transmit data to the access point via the channel, (ii) a subchannel of the plurality of subchannels to use during the time slot to transmit data to the access point, and (iii) one or more spatial streams to use on the subchannel and during the time slot to transmit data to the access point.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: June 26, 2018
    Assignee: MARVELL WORLD TRADE LTD.
    Inventors: Lei Wang, Liwen Chu, Yakun Sun, Hongyuan Zhang, Jinjing Jiang, Mingguang Xu, Hui-Ling Lou
  • Patent number: 10009736
    Abstract: A first access point including a physical layer (PHY) module, a parameter module and a medium access control (MAC) module. The parameter module is configured to, via the PHY module, negotiate a first parameter with a second access point. A basic service set of the first access point overlaps a basic service set of the second access point. The first basic service set includes stations. The second basic service set includes one or more of the stations. The MAC module is configured to receive a first frame. The PHY module is configured to, based on the first parameter and during a joint transmission of the first frame by the first access point and the second access point, transmit the first frame to the stations according to a first address while the second access point transmits the first frame to the one or more stations according to the first address.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: June 26, 2018
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou, Lei Wang, Yakun Sun, Jinjing Jiang
  • Patent number: 10009781
    Abstract: A wireless device including a metric generating module and a parameter selecting module. The metric generating module is configured to generate a first metric based on (i) a number of frames retransmitted over a first time period, and (ii) a total number of frames transmitted over the first time period. The metric generating module is configured to generate a second metric based on (i) a number of frames received more than once over a second time period, and (ii) a total number of frames received over the second time period. The parameter selecting module is configured to select one or more transmission parameters to transmit data based on one or more of the first metric and the second metric.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: June 26, 2018
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Lei Wang, Yakun Sun, Liwen Chu, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10009894
    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: Grant
    Filed: November 30, 2015
    Date of Patent: June 26, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu
  • Publication number: 20180167929
    Abstract: One or more trigger frames are generated at a first communication device to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices. Each of the one or more trigger frames (i) includes an indication of a trigger type and (ii) is formatted according to the indicated trigger type. The first communication device transmits the one or more trigger frames to the multiple second communication devices. The first device then receives the triggered uplink OFDMA transmission that includes respective transmissions from the multiple second communication devices.
    Type: Application
    Filed: December 7, 2015
    Publication date: June 14, 2018
    Inventors: Liwen CHU, Yakun SUN, Hongyuan ZHANG, Lei WANG, Jinjing JIANG, Hui-Ling LOU
  • Patent number: 9991996
    Abstract: An access point (AP) contends for a medium during a contention period in order to obtain exclusive control of the medium for a certain time period that may include one or more transmission opportunities. The AP and client stations (STAs) communicate during the time period using orthogonal frequency division multiple access (OFDMA) techniques with scheduled use (i.e., allocation) of sub-channels of the medium. The AP controls this scheduling for down-link and up-link communications by sending control signaling to inform the STAs of the resource allocation schedule which specifies STAs involved in the OFDMA communications along with the sub-channel identification bandwidth allocated to each STA. The control signaling may be a combination of physical layer (PHY) and medium access control layer (MAC) communicated information.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: June 5, 2018
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George A. Vlantis
  • Patent number: 9992774
    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: November 11, 2015
    Date of Patent: June 5, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Hui-Ling Lou, Jinjing Jiang
  • Patent number: 9980219
    Abstract: A IEEE 802.11 Wireless Local Area Network (WLAN) system of an access point (AP) and one or more stations (STAs) reduces power consumption and increases battery life of power efficient low power STAs by decreasing the amount of time that a power efficient low power STA remains in an awake state. After indicating power efficient low power operation during association with an AP supporting such operation, the power efficient low power STA may enter the doze state from the time that the power efficient low power STA sends a PS-Poll until the power efficient low power STA receives the buffered DATA frame from the AP. While implementing the power efficient PS-Poll method, the AP can send the buffered DATA frame to the STA SIFS after the AP sends an ACK to the received PS-Poll from the STA.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: May 22, 2018
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George A. Vlantis
  • Patent number: 9980268
    Abstract: A communication device assigns a plurality of different orthogonal frequency division multiplex (OFDM) tone blocks for a wireless local area network (WLAN) communication channel to a plurality of devices. At least a first assigned OFDM tone block has a first frequency bandwidth that is less than a smallest bandwidth of a legacy WLAN communication protocol. The communication device generates an orthogonal frequency division multiple access (OFDMA) physical layer (PHY) data unit for transmission in the WLAN communication channel. The OFDMA PHY data unit is generated to include: a preamble portion that includes a legacy signal field having a bandwidth equal to the smallest bandwidth of the legacy WLAN communication protocol; and a data portion that includes respective independent data for the plurality of devices modulated to respective OFDM tone blocks, including data for a first communication device modulated to the first assigned OFDM tone block.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: May 22, 2018
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Hui-Ling Lou, Liwen Chu
  • Patent number: 9979710
    Abstract: A wireless local area network system establishes a PASSPOINT™ connection between a mobile station and a hotspot using an enhanced single SSID method or an enhanced dual SSID method. In the dual SSID method, an access point associates and authenticates a mobile device to a secondary SSID of the access point during enrollment and provisioning. After enrollment, the access point authenticates the mobile station to a primary SSID of the access point using the credential that the mobile station received from an online sign-up (“OSU”) server in connection with the secondary SSID. In the single SSID method, an access point performs two levels of authentication. During authentication, communications are limited to an 802.1x controlled port running on the mobile station and access point. After a first authentication, communications between the OSU server and the mobile station are unblocked. After the second authentication, all traffic from the mobile station is unblocked.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: May 22, 2018
    Assignee: STMICROELECTRONICS, INC.
    Inventors: Liwen Chu, George A. Vlantis
  • Patent number: 9974040
    Abstract: While a peer-to-peer (P2P) wireless network that includes both i) a first communication device and ii) a second communication device is not formed, and prior to the first communication device and the second communication device performing a group owner (GO) negotiation in connection with forming the P2P wireless network, the first communication device performs a ranging exchange with the second communication device. After performing the ranging exchange with the second communication device, the first communication device performs a GO negotiation with the second communication device.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: May 15, 2018
    Assignee: Marvell International Ltd.
    Inventors: Liwen Chu, Sagar Tamhane, Sarang Shrikrishna Wagholikar, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20180109970
    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: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Inventors: Liwen Chu, Sagar A. Tamhane, Sarang Shrikrishna Wagholikar, Hongyuan Zhang, Hui-Ling Lou