Patents by Inventor Rui Cao

Rui Cao 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: 20210336720
    Abstract: Various embodiments relate to a method performed by a first wireless device for bandwidth negotiation for frame exchange in a TXOP with a second wireless device, including: announcing by the first wireless device a channel puncture scheme indicating whether some 20 MHz channels covering a BSS operating bandwidth are punctured or not; transmitting a frame to the second wireless device indicating a bandwidth for the frame exchange; receiving a frame from the second wireless device indicating a negotiated bandwidth for the frame exchange; and exchanging frames with the second wireless device using the negotiated bandwidth.
    Type: Application
    Filed: April 26, 2021
    Publication date: October 28, 2021
    Inventors: Liwen Chu, Hongyuan Zhang, Huiling Lou, Rui Cao
  • Publication number: 20210336752
    Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves operating an Access Point (AP) using feedback subcarrier indices for a bandwidth up to 320 MHz, signaling, by the AP, to a client, a subcarrier location set on which a feedback report is solicited, signaling, by the AP, to a client, a feedback type solicited on the subcarrier location, and indicating, by the client, feedback subcarrier indices for the subcarrier location set via the feedback report solicited by the AP.
    Type: Application
    Filed: April 23, 2021
    Publication date: October 28, 2021
    Inventors: Young Hoon Kwon, Rui Cao, Liwen Chu, Hongyuan Zhang, Hari Ram Balakrishnan, Sudhir Srinivasa, Sayak Roy, Xiayu Zheng
  • Publication number: 20210321388
    Abstract: Communications may be effected in a communications environment involving a plurality channels having disparate bandwidth and channel center frequency indexes. Communications are effected using first communications type with a first channel bandwidth and first channel center frequency index. Communications are also effected via a second communications type using a separate set of fields indicating a second channel bandwidth and a second channel center frequency index, the second channel bandwidth being different than the first channel bandwidth and the second channel center frequency index being different than the first channel center frequency index. The channel center frequency index and bandwidth communicated in each communication may utilize separate subfields.
    Type: Application
    Filed: April 13, 2021
    Publication date: October 14, 2021
    Inventors: Young Hoon Kwon, Liwen Chu, Sudhir Srinivasa, Hongyuan Zhang, Rui Cao
  • Publication number: 20210320763
    Abstract: Various embodiments relate to a method for transmitting a Wi-Fi signal using a channel of 80 MHz or wider, wherein each 80 MHz segment has a tone plan, including: determining that a physical 20 MHz sub-channel overlaps the 80 MHz segment or OFDMA transmission is used for the 80 MHz segment; selecting an alternative 80 MHz tone plan; and transmitting data on the 80 MHz segment using the selected alternative 80 MHz tone plan.
    Type: Application
    Filed: March 25, 2021
    Publication date: October 14, 2021
    Inventors: Rui Cao, Sudhir Srinivasa, Hongyuan Zhang
  • Publication number: 20210288858
    Abstract: A communication device selects a frequency bandwidth via which a physical layer (PHY) protocol data unit (PPDU) will be transmitted in a vehicular communication network, and generates, the PPDU i) according to a downclocking ratio of 1/2, and ii) based on an orthogonal frequency division multiplexing (OFDM) numerology defined by an IEEE 802.11ac Standard. In response to the selected frequency bandwidth being 10 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 20 MHz PPDUs. In response to the selected frequency bandwidth being 20 MHz, the PPDU is generated according to the downclocking ratio of 1/2 and based on the OFDM numerology defined by the IEEE 802.11ac Standard for 40 MHz PPDUs.
    Type: Application
    Filed: May 28, 2021
    Publication date: September 16, 2021
    Inventors: Rui CAO, Hongyuan ZHANG, Hui-Ling LOU, Xiayu ZHENG
  • Publication number: 20210289386
    Abstract: Various embodiments relate to a method performed by a first wireless device for announcing operating capabilities to a second wireless device, wherein the first wireless device and second wireless device support a first protocol and a second protocol, including: announcing by the first device original capabilities to the second device; receiving an announcement of capabilities from the second device; receiving frames from the second device in PHY Protocol Data Units (PPDUs) following the first protocol and the second protocol; announcing by the first device a change in its capabilities to the second device; and receiving frames from the second device in PPDUs transmitted using the changed capabilities following the first protocol and the second protocol, wherein the change in the capabilities includes a change in a one of a puncture parameter, bandwidth parameter, mode and coding scheme (MCS) parameter, and a number of simultaneous streams (Nss) parameter.
    Type: Application
    Filed: March 16, 2021
    Publication date: September 16, 2021
    Inventors: Liwen Chu, Young Hoon Kwon, Hongyuan Zhang, Huiling Lou, Rui Cao
  • 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
  • Publication number: 20210264272
    Abstract: The disclosure provides a training method and system of a neural network model including a three-level model, and a prediction method and system. The training method comprises: acquiring a training data record; generating features of a training sample based on attribute information of the training data record, and using a label of the training data record as a label of the training sample; training the neural network model using a set of the training samples, learning an interaction representation between corresponding input items respectively by a plurality of intermediate models comprised in a second-level model of the neural network model, learning a prediction result at least based on the interaction representations output by the second-level model by a third-level model of the neural network model, and adjusting the neural network model at least based on a difference between the prediction result and the label.
    Type: Application
    Filed: July 22, 2019
    Publication date: August 26, 2021
    Inventors: Yuanfei LUO, Weiwei TU, Rui CAO, Yuqiang CHEN
  • 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: 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
  • Patent number: 11102336
    Abstract: Communication apparatus includes a transceiver configured to transmit and receive signals over a wireless channel in accordance with both a first communication protocol and a second communication protocol. The second communication protocol is backward-compatible with the first communication protocol, while defining an enhanced communication bandwidth that is at least twice the nominal communication bandwidth of the first communication protocol. A communication controller generates data frames for transmission by the transceiver, including frame headers in a header format that is compatible with both the first communication protocol and the second communication protocol, such that the frame headers are transmitted within the nominal communication bandwidth. The data frames that are transmitted in accordance with the second communication protocol have first and second frame headers that are transmitted in parallel in respective first and second sub-bands of the enhanced communication bandwidth.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: August 24, 2021
    Assignee: MARVELL ASIA PTE LTD
    Inventors: Rui Cao, Hongyuan Zhang, Prashant Sharma
  • Publication number: 20210258408
    Abstract: Communication apparatus includes a transceiver configured to communicate over a wireless channel in accordance with both a first and a second communication protocol. The second communication protocol is backward-compatible with the first communication protocol, and has an extended range, which is greater than a nominal range defined by the first communication protocol. A communication controller is configured to generate data frames for transmission by the transceiver, including frame headers in a header format that is compatible both with the first communication protocol and with the second communication protocol. The frame headers include a set of legacy header fields. The communication controller is configured to transmit the legacy fields with a first gain according to the first communication protocol, and to apply a second gain, greater than the first gain, to a transmission of at least one of the legacy header fields for communicating in accordance with the second communication protocol.
    Type: Application
    Filed: May 2, 2021
    Publication date: August 19, 2021
    Inventors: Rui Cao, Hongyuan Zhang, Prashant Sharma
  • Patent number: 11088625
    Abstract: This invention proposes a three-phase CLLC bidirectional DC-DC converter, which includes a high-voltage side voltage dividing capacitor module, a three-phase half-bridge series module, a three-phase half-bridge parallel module, a three-phase primary/secondary side resonant module, a three-phase isolation transformer and a low-voltage side capacitor module. The high-voltage side voltage dividing capacitor module includes three voltage dividing capacitors. The three-phase half-bridge series/parallel module includes three bridge arms connected in series/parallel. Each bridge arm includes two switches connected in series. The three-phase primary/secondary side resonant module includes a, b, c three-phase primary/secondary side resonant tank. The three-phase isolation transformer includes three single-phase transformers a, b, and c.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: August 10, 2021
    Assignee: INSTITUTE OF ELECTRICAL ENGINEERING, CHINESE ACADEMY OF SCIENCES
    Inventors: Guoen Cao, Yibo Wang, Rui Cao, Zhe Wang, Yong Zhao
  • 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: 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: 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
  • Patent number: 11071060
    Abstract: Embodiments described herein provide a method for transmitting a wake-up radio packet to low power devices in a wireless local area network. At a wireless access point having a plurality of antennas, data for transmission to one or more lower power wireless devices are received. A wake-up radio packet, including a wake-up data frame, is configured for transmission to the one or more lower power wireless devices. A waveform for transmitting the wake-up radio packet is generated. At each of the plurality of antennas, the waveform is adjusted with spatial mapping to prevent unintentional spatial nulling of the waveform during transmission of the wake-up radio packet. The wake-up radio packet is transmitted, via the plurality of antennas, in a form of the adjusted waveform to the one or more lower power wireless devices prior to transmitting the received data to the one or more lower power wireless devices.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: July 20, 2021
    Assignee: Marvell Asia Pte, Ltd.
    Inventors: Rui Cao, Hongyuan Zhang, Sudhir Srinivasa
  • Publication number: 20210218661
    Abstract: Example methods and systems for intent-based network virtualization design are disclosed. One example may comprise: obtaining configuration information and traffic information associated with multiple virtualized computing instances, processing the configuration information and traffic information to identify network connectivity intents and mapping the network connectivity intents to a logical network topology template. Based on a first switching intent, a first group may be assigned to a first logical network domain and the logical network topology template configured to include a first logical switching element. Based on a second switching intent, a second group may be assigned to a second logical network domain and the logical network topology template configured to include a second logical switching element. Based on a routing intent, the logical network topology template may be configured to include a logical routing element.
    Type: Application
    Filed: March 4, 2020
    Publication date: July 15, 2021
    Applicant: VMware, Inc.
    Inventors: Ziyou WANG, Donghai HAN, Mengdie SONG, Rui CAO
  • Publication number: 20210211221
    Abstract: Embodiments of a method and apparatus for communications are disclosed. In an embodiment, a method for wireless communications involves, in a punctured transmission, encoding, bits in a non-legacy preamble portion of a packet to include bandwidth information and resource allocation information, and signaling, in the packet, the bandwidth information and resource allocation information for at least one of a single-user-multiple-input multiple-output (SU-MIMO) technique, a multiple-user-multiple-input multiple-output (MU-MIMO) technique, and an orthogonal frequency-division multiple access (OFDMA) technique.
    Type: Application
    Filed: December 31, 2020
    Publication date: July 8, 2021
    Inventors: Rui CAO, Hongyuan ZHANG, Liwen CHU