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: 11122567
    Abstract: A communication device associated with a first wireless communication network transmits an indication that a communication channel in an unlicensed frequency band is being utilized by the first wireless communication network. The indication is transmitted to an access point of a second wireless communication network. The first wireless communication network utilizes a first wireless communication protocol developed for use in licensed frequency bands, and the second wireless communication network utilizes a second wireless communication protocol developed for use in the unlicensed frequency band. The indication is transmitted by the communication device to prompt the access point of the second wireless communication network, to determine that i) the communication channel cannot be used by the second wireless communication network, or ii) the second wireless communication network is to temporarily yield the communication channel to the first wireless communication network.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: September 14, 2021
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang, Mingguang Xu, Liwen Chu, Hui-Ling Lou
  • Patent number: 11108900
    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: Grant
    Filed: April 13, 2020
    Date of Patent: August 31, 2021
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang
  • Patent number: 11108503
    Abstract: A first communication device receives an aggregated data unit from a second communication device. The aggregated data unit aggregates (i) one or more sets of multiple data units, each set of multiple data units to be acknowledged by a respective block acknowledgement and (ii) one or more single data units, each single data unit to be acknowledged by a respective single acknowledgement. The first communication device generates a block acknowledgment frame that includes (i) block acknowledgement information to acknowledge the one or more sets of multiple data units, and (ii) single acknowledgment information to acknowledge the one or more single data units, where the block acknowledgement frame omits an indication that the block acknowledgement frame includes the single acknowledgement information. The first communication device causes the block acknowledgement frame to be transmitted to the second communication device.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: August 31, 2021
    Assignee: NXP USA, INC.
    Inventors: Jinjing Jiang, Liwen Chu, Lei Wang, Yakun Sun, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 11109314
    Abstract: A communication device in a wireless local area network (WLAN) generates a first portion of a wakeup radio (WUR) packet and a second portion of the WUR packet. The first portion of the WUR packet corresponds to a WLAN legacy physical layer (PHY) preamble. Generating the second portion of the WUR packet includes: generating the second portion of the WUR packet to include a WUR packet PHY sync signal. The WUR packet PHY sync signal corresponds to a sync bit sequence with each bit in the sync bit sequence modulated by a sync waveform. The second portion of the WUR packet is generated to also include a PHY data portion and a padding signal. The padding signal corresponds to a padding bit sequence with each bit in the padding bit sequence modulated by the sync waveform. The communication device transmits the WUR packet in the WLAN.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: August 31, 2021
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Rui Cao, Hongyuan Zhang, Liwen Chu
  • Patent number: 11105916
    Abstract: An access point (AP) device of a wireless communication network determines that an unassociated client station requests to participate in a ranging measurement procedure with the AP device, and determines a preliminary network ID for uses by the unassociated client station during a ranging measurement session and while the unassociated client station remains unassociated with the wireless communication network. The AP device transmits a packet having the preliminary network ID, and after transmitting the packet having the preliminary network ID, participates in a multi-user (MU) null data packet (NDP) ranging measurement session with a plurality of client stations that includes the unassociated client station.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: August 31, 2021
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Huiling Lou
  • Publication number: 20210266891
    Abstract: Embodiments of a method and an apparatus for multi-link operations are disclosed. In an embodiment, a method of multi-link operations involves, at a multi-link station device that has a non-simultaneous transmission and reception capability (NSTR STA MLD) that supports multiple links, exchanging frames on multiple links with a multi-link access point device (AP MLD) that has at least one of a simultaneous transmission capability and a simultaneous transmission and reception (STR) capability, and maintaining, at the NSTR STA MLD, at least one of a frame exchange and a link state on multiple links with the AP MLD that has at least one of the simultaneous transmission capability and the STR capability.
    Type: Application
    Filed: February 23, 2021
    Publication date: August 26, 2021
    Inventors: Liwen CHU, Young Hoon KWON, Hongyuan ZHANG, Huiling LOU
  • Publication number: 20210266386
    Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves encoding bits in a first preamble portion of a packet that are defined on a per-channel basis and that are repeated across multiple frequency blocks of a bandwidth, encoding bits in a second preamble portion of the packet that are defined on the per-channel basis and that are repeated within at least one frequency block of the bandwidth, encoding bits in a third preamble portion of the packet that are defined on a two-channel basis and that are repeated within at least one frequency block of the bandwidth, padding the third preamble portion of the packet to have a same length for each of the frequency blocks, and transmitting the packet.
    Type: Application
    Filed: February 22, 2021
    Publication date: August 26, 2021
    Inventors: Rui Cao, Liwen Chu, Sudhir Srinivasa, Hongyuan Zhang, Yan Zhang, Xiayu Zheng
  • Publication number: 20210266098
    Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method of wireless communications involves encoding bits in Extremely High Throughput (EHT) signaling fields of a packet corresponding to at least one of an Orthogonal Frequency-Division Multiple Access (OFDMA) mode, a non-OFDMA mode, and a Null Data Packet (NDP) mode, wherein EHT signaling fields include a Universal signal (U-SIG) field and an EHT signal (EHT-SIG) field, and transmitting the packet with encoded bits corresponding to at least one of the OFDMA mode, the non-OFDMA mode, and the NDP mode.
    Type: Application
    Filed: February 22, 2021
    Publication date: August 26, 2021
    Inventors: Rui Cao, Liwen Chu, Sudhir Srinivasa, Hongyuan Zhang, Prashant Sharma, Xiayu Zheng
  • Publication number: 20210266890
    Abstract: A method and an apparatus for operating a Basic Service Set (BSS) are disclosed. A method involves announcing, by a first wireless device to a second wireless device, a BSS operating channel, wherein the first wireless device has at least one of a first transmission power capability and a first bandwidth capability, the second wireless device has at least one of a second transmission power capability that is less than the first transmission power capability and a second bandwidth capability that is narrower than the first bandwidth capability, and wherein the BSS operating channel is at least one of a punctured operating channel and an unpunctured operating channel, associating, by the second wireless device, with the first wireless device via the announcement of the BSS operating channel from the first wireless device, and exchanging frames between the first wireless device and the second wireless device in the BSS operating channel.
    Type: Application
    Filed: February 22, 2021
    Publication date: August 26, 2021
    Inventors: Liwen CHU, Rui CAO, Sudhir SRINIVASA, Hongyuan ZHANG, Huiling LOU, Young Hoon KWON
  • Publication number: 20210266931
    Abstract: One example discloses a first-device: wherein the first-device is configured to be coupled to a second-device over an IEEE 802.11 communications link; and wherein the first-device is configured to, store a current setup between the first-device and the second-device; identify a unique identifier of the second-device; transmit a request frame to a third-device; wherein at least one of the second-device and third-device is a multi-link-device (MLD); wherein the request frame is configured to request an association with the third-device and includes the unique identifier of the second-device; receive a response frame from the third-device; and wherein the response frame includes an indication that request was successful.
    Type: Application
    Filed: February 22, 2021
    Publication date: August 26, 2021
    Inventors: Young Hoon Kwon, Liwen Chu, Hongyuan Zhang, Huiling Lou
  • Patent number: 11102780
    Abstract: A first communication device generates a plurality of media access control (MAC) layer data units to be transmitted to a second communication device via a communication channel that includes a first frequency segment and a second frequency segment separated by a gap in frequency. The first communication device generates one or more physical layer (PHY) data units that include the plurality of MAC layer data units, and simultaneously transmits i) a first frequency portion of the one or more PHY data units via the first frequency segment, and ii) a second frequency portion of the one or more PHY data units via the second frequency segment, including transmitting a first MAC layer data unit in the first frequency portion, and ii) transmitting a second MAC layer data unit in the second frequency portion.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: August 24, 2021
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang
  • Patent number: 11082156
    Abstract: A communication device generates a physical layer (PHY) data portion of a PHY data unit, including, for each of a plurality of PHY protocol service data units (PSDUs) to be included in the PHY data unit: selecting a segment boundary within a last-occurring orthogonal frequency division (OFDM) symbol from among a set of multiple segment boundaries, adding pre-forward error correction (pre-FEC) padding bits to the PSDU such that, after encoding the PSDU according to a forward error correction (FEC) code, coded bits of the PSDU end on the selected segment boundary, and individually encoding the PSDU according to the FEC code. The communication device generates a PHY preamble, which includes generating the PHY preamble to include a plurality of indications of a plurality of durations of the respective PSDUs within the PHY data portion.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: August 3, 2021
    Assignee: NXP USA, Inc.
    Inventors: Yan Zhang, Liwen Chu, Rui Cao, Sudhir Srinivasa, Hongyuan Zhang
  • Patent number: 11082888
    Abstract: A method for communicating an acknowledgment policy for a data unit in a wireless local area network is described. A plurality of medium access control (MAC) protocol data units (MPDUs) of an aggregate MPDU intended for a second communication device are generated. A plurality of MPDU delimiters are generated, each MPDU delimiter of the plurality of MPDU delimiters indicating an acknowledgment policy for a corresponding MPDU of the plurality of MPDUs. At least two MPDUs of the plurality of MPDUs correspond to MPDU delimiters that indicate an acknowledgment policy corresponding to a single acknowledgment frame for the corresponding MPDUs. The aggregate MPDU is generated to include the plurality of MPDUs and the plurality of MPDU delimiters. The aggregate MPDU is caused to be transmitted from the first communication device to the second communication device.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: August 3, 2021
    Assignee: NXP USA, INC.
    Inventors: Liwen Chu, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 11082155
    Abstract: A communication device generates one or more physical layer (PHY) PHY protocol service data units (PSDUs) of a PHY data unit, and individually encodes PSDUs of the one or more PSDUs. The communication device generates a PHY preamble of the PHY data unit, including: generating a first signal field in the PHY preamble, and including in the first signal field an indicator to indicate that the PHY preamble includes a second signal field with HARQ information regarding the PHY data unit, and generating the second signal field to include one or more indications of one or more durations of the one or more respective PSDUs within a PHY data portion of the PHY data unit.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: August 3, 2021
    Assignee: NXP USA, Inc.
    Inventors: Yan Zhang, Liwen Chu, Rui Cao, Sudhir Srinivasa, Hongyuan Zhang
  • Publication number: 20210235449
    Abstract: A first communication device allocates respective portions of a communication channel, that includes at least one primary component channel and one or more non-primary component channels, to a plurality of second communication devices, including a bandwidth-limited second communication device configured to operate with a maximum bandwidth that is less than a full bandwidth of the communication channel. The bandwidth-limited second communication device is operating in a particular component channel, and allocation of a frequency portion to the bandwidth-limited second communication device is restricted to the particular component channel.
    Type: Application
    Filed: April 13, 2021
    Publication date: July 29, 2021
    Inventors: Liwen CHU, Lei WANG, Hongyuan ZHANG, Yakun SUN, Jinjing JIANG, Hui-Ling LOU
  • Publication number: 20210227529
    Abstract: Embodiments of a method and an apparatus for multi-link data transmission are disclosed. In an embodiment, a method for communications involves at a first device, transmitting, to a second device, a trigger frame that solicits at least one Physical layer Protocol Data Unit (PPDU) for uplink transmission, wherein the trigger frame includes a standard-compatible common info field that includes a trigger type field and a standard-compatible user info list field that includes at least one user info field, wherein the trigger frame includes a solicited Trigger-Based (TB) type indicator in a field in the trigger frame other than the trigger type field, and receiving, at the first device, at least one PPDU from the second device in response to the solicited TB type indicator that was transmitted in the trigger frame by the first device.
    Type: Application
    Filed: December 31, 2020
    Publication date: July 22, 2021
    Inventors: Liwen CHU, Rui CAO, Sudhir SRINIVASA, Hongyuan ZHANG, Young Hoon KWON, Hui-Ling LOU
  • Publication number: 20210219315
    Abstract: An AP transmits a multi-user first downlink transmission to a plurality of client stations via a first WLAN communication channel having a first RF bandwidth. The AP generates a MAC data unit having a trigger frame configured to prompt an uplink multi-user transmission by the plurality of client stations, and transmits a second downlink transmission to the plurality of client stations via a second WLAN communication channel having a second RF bandwidth. The second downlink transmission includes the MAC data unit. The AP receives the uplink multi-user transmission from the plurality of client stations via the second WLAN communication channel, the uplink multi-user transmission including simultaneous transmissions from the plurality of client stations within the second WLAN communication channel that overlap in time with the multi-user first downlink transmission via the first WLAN communication channel.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Hongyuan ZHANG, Liwen CHU
  • Publication number: 20210219291
    Abstract: An AP determines an overall frequency bandwidth of an operating channel of a WLAN, and one or more punctured sub-channels for the operating channel. The AP transmits a first packet to one or more client stations of the WLAN, the first packet specifying i) the overall frequency bandwidth of the operating channel, and ii) the one or more punctured sub-channels. The AP receives a second packet that includes an RTS frame from a first client station. The AP determines that one or more sub-channels in the operating channel are not idle from the standpoint of the AP, and in response to receiving the second packet, the AP transmits a third packet that includes a CTS frame that indicates to the one or more client stations of the WLAN that only a subset of sub-channels in the operating channel is reserved for a transmit opportunity of the first client station.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU
  • Patent number: 11063718
    Abstract: Systems and techniques relating to wireless networking systems and techniques, namely employing acknowledgement mechanisms utilized with trigger frames, include: transmitting, by a first wireless device, a first frame, wherein the first frame comprises a field indicating a response frame type associated with reception of the first frame; receiving, by the first wireless device from a second wireless device, an acknowledgement (ACK) frame associated with the field in the first frame via an established wireless communication channel, the ACK frame having a frame type corresponding to the response frame type indicated in the first frame; and receiving, by the first wireless device from the second wireless device, additional frames associated with the ACK frame.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: July 13, 2021
    Assignee: MARVELL ASIA PTE, LTD.
    Inventors: Liwen Chu, Lei Wang, Jinjing Jiang, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20210211375
    Abstract: Embodiments of a method and an apparatus for multi-link data transmission are disclosed. In an embodiment, a method of multi-link communications involves at a first MLD that supports a first link, link1, and a second link, link2, transmitting a first frame during a first Transmission Opportunity (TXOP) on link1, and a second frame during a second TXOP on link2, simultaneously to a second MLD, receiving, at the first MLD, a first response frame to the first frame transmitted on link1 after a transmission end time of the first frame, identifying, at the first MLD, that a response frame to the second frame transmitted on link2 was not received after the transmission end time of the second frame, and transmitting, at the first MLD, a third frame on link1 and a fourth frame on link2 simultaneously, after receiving the first response frame on link1.
    Type: Application
    Filed: December 31, 2020
    Publication date: July 8, 2021
    Inventors: Young Hoon KWON, Liwen CHU, Hongyuan ZHANG, Hui-Ling LOU