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).

  • Patent number: 11558226
    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: Grant
    Filed: May 28, 2021
    Date of Patent: January 17, 2023
    Assignee: Marvell Asia Pte Ltd
    Inventors: Rui Cao, Hongyuan Zhang, Hui-Ling Lou, Xiayu Zheng
  • Publication number: 20220416988
    Abstract: A wireless communication system, apparatus, and methodology are described for enabling wireless communication station (STA) devices to generate a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU) having a size that is less than a spreading frequency block by using one or more predetermined pilot and/or data tone mapping plans to control how each pilot/data tone from the RU is distributed onto a disjoint set of pilot/data subcarriers forming a distributed RU included in the spreading frequency block, thereby accommodating transmission of wider bandwidth and multiple resource unit assignments in accordance with power spectrum density (PSD) limits provided for orthogonal frequency-division multiplexing (OFDM) modulated symbols supported by emerging 802.11 standards.
    Type: Application
    Filed: June 16, 2022
    Publication date: December 29, 2022
    Applicant: NXP USA, Inc.
    Inventors: Rui Cao, Ying Liu, Dong Wei, Yan Zhang
  • Patent number: 11539481
    Abstract: A first device transmits to a second device a first data unit which indicates a maximum number of long training field (LTF) symbols that the first device transmits and receives for a multiple input multiple output communication. The first device receives, from the second device, a second data unit which comprises a plurality of LTF symbols up to the maximum number of LTF symbols the first device receives indicated by the first data unit. A channel estimation is performed based on the plurality of LTF symbols of the second data unit up to the maximum number of LTF symbols indicated by the first data unit to recover information in one or more fields of the second data unit. For the case when the second data unit is a trigger frame, the first device generates the third data unit with a plurality of LTF symbols up to the maximum number of LTF symbols the first device transmits indicated by the first data unit and transmits the third data unit.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: December 27, 2022
    Assignee: NXP USA, Inc.
    Inventors: Yan Zhang, Sudhir Srinivasa, Hongyuan Zhang, Rui Cao
  • Publication number: 20220408462
    Abstract: Wireless communications comprises generating a trigger frame which has a first set of bits which directly indicates a resource unit (RU) arranged as a distributed RU is solicited to be transmitted in an uplink direction in a first frequency block and a second set of bits which directly indicates for one or more second frequency subblocks a spreading bandwidth of tones of the distributed RU or whether a second frequency subblock is a punctured subchannel. An access point (AP) transmits the trigger frame in a downlink direction to a non-AP station. The non-AP station generates and transmits in the uplink direction a Physical Layer Protocol Data Unit (PPDU) to the AP station with data modulated on the tones of the distributed RU based on the first set of bits and the second set of bits of the trigger frame.
    Type: Application
    Filed: June 14, 2022
    Publication date: December 22, 2022
    Inventor: Rui Cao
  • Publication number: 20220407644
    Abstract: A device, a system, and a method for power spectrum density (PSD) limited transmissions are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to generate a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) that includes a base modulation frequency unit, where the base modulation frequency unit is duplicated to unpunctured subchannels of the PPDU with a phase rotation, and transmit the PPDU in accordance with a power spectrum density (PSD) limit.
    Type: Application
    Filed: May 24, 2022
    Publication date: December 22, 2022
    Inventors: Rui Cao, Yan Zhang, Dong Wei, Hongyuan Zhang
  • Patent number: 11533592
    Abstract: In a vehicular communication network, a communication device generates a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in the vehicular communication network. The communication device generates a plurality of PHY data segments of the PPDU, and one or more PHY midambles, each PHY midamble to be transmitted between a respective pair of adjacent PHY data segments, and each PHY midamble including one or more training signal fields. Generating the one or more PHY midambles includes, when the PPDU is to be transmitted according to an extended range (ER) mode, generating each training signal field to include i) a first portion based on a very high throughput long training field (VHT-LTF) defined by the IEEE 802.11ac Standard and ii) a second portion based on the VHT-LTF defined by the IEEE 802.11ac Standard; and transmitting, by the communication device, the PPDU in the vehicular communication network.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: December 20, 2022
    Assignee: Marvell Asia Pte Ltd
    Inventors: Rui Cao, Prashant Sharma, Hongyuan Zhang
  • Patent number: 11533209
    Abstract: A communication device receives a physical layer (PHY) protocol data unit (PPDU). The PPDU includes i) a PHY preamble and ii) PHY data portion that includes one or more PHY midambles, and the PHY preamble includes i) an indication of a length of the PPDU, and ii) an indication of a periodicity of PHY midambles in the PHY data portion. The communication device calculates a number of PHY midambles in the PPDU using i) the indication of the length of the PPDU, and ii) the indication of the periodicity of PHY midambles. The communication device calculates a reception time for the PPDU using the calculated number of PHY midambles, and processes the PPDU using the calculated reception time.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: December 20, 2022
    Assignee: NXP USA, INC.
    Inventors: Yan Zhang, Hongyuan Zhang, Rui Cao
  • Publication number: 20220400053
    Abstract: The method of some embodiments allocates a secondary network interface for a pod, which has a primary network interface, in a container network operating on an underlying logical network. The method receives an ND that designates a network segment. The method receives the pod, wherein the pod includes an identifier of the ND. The method then creates a secondary network interface for the pod and connects the secondary network interface to the network segment. In some embodiments, the pods include multiple ND identifiers that each identify a network segment. The method of such embodiments creates multiple secondary network interfaces and attaches the multiple network segments to the multiple secondary network interfaces.
    Type: Application
    Filed: July 29, 2021
    Publication date: December 15, 2022
    Inventors: Danting Liu, Jianjun Shen, Wenfeng Liu, Rui Cao, Ran Gu, Donghai Han
  • Patent number: 11528104
    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: Grant
    Filed: March 25, 2021
    Date of Patent: December 13, 2022
    Assignee: NXP USA, Inc.
    Inventors: Rui Cao, Sudhir Srinivasa, Hongyuan Zhang
  • Patent number: 11510143
    Abstract: An access point establishes a first communication channel as a primary channel of the access point, and transmits wakeup radio (WUR) beacon frames via a second communication channel, different than the first communication channel, that corresponds to a WUR primary channel. The access point negotiates, with a client station, a third communication channel, different than the first and second communication channels, via which the access point is to transmit wakeup frames for the client station. The access point generates a wakeup frame for transmission to the client station via the third communication channel, generates a wakeup packet to include at least the wakeup frame, and transmits the wakeup packet, including transmitting the wakeup frame to the client station via the third communication channel.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: November 22, 2022
    Assignee: Marvell Asia Pte Ltd
    Inventors: Liwen Chu, Rui Cao, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 11496926
    Abstract: In an 802.11be wireless system, data units are generated for transmission by configuring a transmitting device to process encoding parameters, including a first encoding parameter NSD and a second encoding parameter NSD,short, to select a padding boundary from pre-defined padding boundaries in the last symbol that will most closely include the number of information bits NEXCESS in the last symbol and to append padding bits to the number of information bits NEXCESS to fill up to the selected padding boundary in the last symbol, thereby generating pre-encoded data bits which are encoded for data transmission, where at least the first encoding parameter NSD is specified for an aggregated resource unit size that is allowed under the 802.11be protocol as a sum of NSD values for at two other resource units.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: November 8, 2022
    Assignee: NXP USA, Inc.
    Inventors: Rui Cao, Sudhir Srinivasa, Hongyuan Zhang, Mao Yu
  • Publication number: 20220353868
    Abstract: Aspects of the present disclosure are directed to communicating signals to receivers utilizing different protocols. As may be implemented in accordance with one or more embodiments, a set of signals are generated to include data configured in accordance with a first protocol and data configured in accordance with a second protocol. The set of signals are communicated over the wireless channel, by using the data corresponding to the first protocol for communicating with receivers operating in accordance with the first protocol and using the data corresponding to the second protocol to communicate with receivers operating in accordance with the second protocol.
    Type: Application
    Filed: April 8, 2022
    Publication date: November 3, 2022
    Inventors: Vincent Pierre Martinez, Cornelis Marinus Moerman, Rui Cao
  • Patent number: 11490362
    Abstract: Certain specific examples are directed to or involve a plurality of vehicular communication stations including a first type and a second type which communicate over a shared communications channel characterized by a common RF frequency band. The stations may also include at least one of the plurality of vehicular communication stations broadcasting a set of vehicle-specific data over the shared communication channel for reception by the first type according to a first wireless communication protocol and concurrently for reception by the second type according to a second different wireless communication protocol. The broadcast may include a plurality of repetitive consecutive transmissions of the set of vehicle-specific data which may allow for improved range extension and reliability. Each of the repetitive consecutive transmissions may be formatted consistent with the first wireless communication protocol.
    Type: Grant
    Filed: September 4, 2020
    Date of Patent: November 1, 2022
    Assignee: NXP USA, Inc.
    Inventors: Hongyuan Zhang, Rui Cao, Yan Zhang, Liwen Chu
  • Publication number: 20220337353
    Abstract: A wireless communication device generates physical layer (PHY) protocol service data units (PSDUs), and, in response to determining that the PHY data unit is to be transmitted according to a HARQ process, generates HARQ coding units of a common length, each of the HARQ coding units including a respective set of one or more PSDUs, and individually encodes the HARQ coding units. The wireless communication device also generates a HARQ signal field to the included in a PHY preamble of the PHY data unit. The HARQ signal field includes i) a common information subfield to indicate one or more parameters that commonly apply to each of at least some of the one or more HARQ coding units and ii) a respective HARQ coding unit information subfield for each of the HARQ coding units to indicate one or more parameters that apply to only the corresponding HARQ coding unit.
    Type: Application
    Filed: June 27, 2022
    Publication date: October 20, 2022
    Inventors: Yan ZHANG, Liwen CHU, Rui CAO, Hongyuan Zhang
  • Publication number: 20220321495
    Abstract: Some embodiments provide a method of tracking errors in a container cluster network overlaying a software defined network (SDN), sometimes referred to as a virtual network. The method sends a request to instantiate a container cluster network object to an SDN manager of the SDN. The method then receives an identifier of a network resource of the SDN for instantiating the container cluster network object. The method associates the identified network resource with the container cluster network object. The method then receives an error message regarding the network resource from the SDN manager. The method identifies the error message as applying to the container cluster network object. The error message, in some embodiments, indicates a failure to initialize the network resource. The container cluster network object may be a namespace, a pod of containers, or a service.
    Type: Application
    Filed: May 28, 2021
    Publication date: October 6, 2022
    Inventors: Wenfeng Liu, Jianjun Shen, Ran Gu, Rui Cao, Donghai Han
  • Patent number: 11463137
    Abstract: In an embodiment, a method is for communicating in a wireless local area network (WLAN) that utilizes multi-user multiple input, multiple output (MU-MIMO). A first communication device determines an allocation of spatial streams for multiple second communication devices that are intended receivers of an multi-user multiple input, multiple output (MU-MIMO) transmission by the first communication device. The first communication device generates a subfield that indicates respective numbers of spatial streams allocated to respective second communication devices, the generating the subfield performed according to an encoding that supports allocating up to sixteen spatial streams to up to eight intended receivers. The first communication device generates a multi-user physical layer (PHY) data unit that includes i) a PHY preamble, and ii) a PHY data portion. The PHY preamble is generated to include the subfield, and the PHY data portion is generated to include the MU-MIMO transmission.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: October 4, 2022
    Assignee: Marvell Asia Pte Ltd
    Inventors: Yan Zhang, Rui Cao, Bo Yu, Hongyuan Zhang, Liwen Chu
  • Patent number: 11464011
    Abstract: A communication device determines that a communication channel to be used for a multi-user (MU) transmission spans a frequency bandwidth greater than 160 MHz. The communication device allocates one or more frequency resource units (RUs) for the MU transmission, including: in response to determining that the communication channel spans the frequency bandwidth greater than 160 MHz, selecting one or more frequency RUs from a second set of frequency RUs. The second set of frequency RUs omits at least some RUs of a smallest bandwidth that are included in a first set of RUs that is used for allocating frequency RUs for communication channels having bandwidths of at most 160 MHz. The communication device generates allocation information that indicates the allocation of the one or more frequency RUs for the MU transmission, and transmits the allocation information to one or more other communication devices in connection with the MU transmission.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: October 4, 2022
    Assignee: Marvell Asia Pte Ltd
    Inventors: Liwen Chu, Hongyuan Zhang, Rui Cao, Yan Zhang, Hui-Ling Lou
  • Patent number: 11457448
    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: Grant
    Filed: February 22, 2021
    Date of Patent: September 27, 2022
    Assignee: NXP USA, Inc.
    Inventors: Liwen Chu, Rui Cao, Sudhir Srinivasa, Hongyuan Zhang, Huiling Lou, Young Hoon Kwon
  • Patent number: 11411627
    Abstract: A first communication device receives a null data packet (NDP) transmitted by a second communication device as part of a multi-user beamforming training transmission sequence. The NDP includes a set of one or more training signals that allow the first communication device to estimate a communication channel from the second communication device to the first communication device. The first communication device generates, based on the set of one or more training signals included in the NDP received from the second communication device, an aggregate media access control protocol data unit (A-MPDU) to include a plurality of fragments of beamforming training information for the second communication device. No single fragment among the plurality of fragments includes an entirety of the beamforming training information. The first communication device transmits the A-MPDU to the second communication device in a single physical layer (PHY) data unit and as part of a multi-user transmission.
    Type: Grant
    Filed: August 5, 2020
    Date of Patent: August 9, 2022
    Assignee: Marvell Asia Pte Ltd
    Inventors: Liwen Chu, Yakun Sun, Rui Cao, Hongyuan Zhang, Hui-Ling Lou
  • Publication number: 20220239349
    Abstract: A first communication device transmits a plurality of training signals to a second communication device via a communication channel The first communication device receives feedback generated at the second communication device based on the plurality of training signals. The feedback includes steering matrix information for a plurality of orthogonal frequency division multiplexing (OFDM) tones and (ii) additional phase information corresponding to channel estimates obtained for the plurality of OFDM tone. The first communication device constructs, based on the steering matrix information, a plurality of steering matrices corresponding to the plurality of OFDM tones, and compensates, using the additional phase information, the plurality of steering matrices to reduce phase discontinuities between the OFDM tones. The first communication device steers, using the compensated steering matrices, at least one transmission via the communication channel to the second communication device.
    Type: Application
    Filed: April 11, 2022
    Publication date: July 28, 2022
    Applicant: Marvell Asia Pte Ltd
    Inventors: Rui CAO, Hongyuan ZHANG