Patents by Inventor Yakun Sun

Yakun Sun 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: 20190278548
    Abstract: An image processing method. The method includes determining a first mapping relationship between first coordinates in a first coordinate system of a Multi-Resolution-Shading image and second coordinates in a second coordinate system of a Multi-Resolution-Shading screen image; and applying an anti-distortion process to the Multi-Resolution-Shading image based on the first mapping relationship, thereby obtaining an anti-distortion image.
    Type: Application
    Filed: November 26, 2018
    Publication date: September 12, 2019
    Applicants: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Yukun Sun, Hao Zhang, Lili Chen, Jinghua Miao, Xuefeng Wang, Wenyu Li, Bin Zhao, Qiao Li, Lixin Wang, Jianwen Suo, Jinbao Peng, Qingwen Fan, Yali Liu, Yu Lei, Yakun Wang
  • Publication number: 20190280831
    Abstract: A client station of a wireless local area network (WLAN) determines respective availabilities at the client station of a plurality of subchannels for a multi-user (MU) transmission, and generates a media access control (MAC) data unit (MPDU) that includes a MAC header. The MAC header includes a control field, and the control field includes a subfield having i) an identification (ID) that indicates the subfield includes subchannel availability information, and ii) a bitmap that indicates the respective availabilities at the client station of the plurality of subchannels. The client station transmits the MPDU to an access point of the WLAN for a subsequent allocation by the access point of wireless bandwidth for the MU transmission.
    Type: Application
    Filed: May 24, 2019
    Publication date: September 12, 2019
    Inventors: Liwen CHU, Lei WANG, Jinjing JIANG, Hongyuan ZHANG, Yakun SUN, Hui-Ling LOU
  • Patent number: 10411937
    Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is generated with a first OFDM tone spacing. The communication device generate a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is generated with a second OFDM tone spacing that is a fraction 1/N of the first OFDM tone spacing, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is generated with the second OFDM tone spacing.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: September 10, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Mingguang Xu, Rui Cao, Hui-Ling Lou
  • Publication number: 20190273589
    Abstract: Embodiments described herein provide a method for cross-channel scheduling of high efficiency (HE) multi-user (MU) frame transmission. In some embodiments, channel information and client station information may be obtained for data transmission. An MU frame containing a data field of a first type and two data fields of a second type may be configured to carry scheduling information relating to one or more channels for the data transmission. It may be determined that a current scheduling setting of the two data fields of the second type leads to unbalanced payload between the one or more channels. The two data fields of the second type may then be adjusted for a balanced channel mapping, and the data field of the first type may be adjusted to reflect the balanced channel mapping. Data based on the adjusted data field of the first type and the adjusted two data fields of the second type may be transmitted via the one or more channels.
    Type: Application
    Filed: December 19, 2018
    Publication date: September 5, 2019
    Inventors: Yakun Sun, Hongyuan Zhang, Lei Wang
  • Patent number: 10404839
    Abstract: In a method of generating a field of a physical layer (PHY) preamble of a data unit, information bits to be included in the field are generated. Respective sets of tail bits are appended after respective sets of information bits corresponding to respective ones of a plurality of groups of subfields of the field, each group including one or more of the subfields of the field, to generate an encoder input bit stream. One or more padding bits are added to the encoder input stream to generate a padded encoder input bit stream, the one or more padding bits to ensure an integer number of puncturing blocks in an encoded output bit stream. The padded encoder input bit stream is encoded to generate the encoded output bit stream. The field is generated to include at least some bits from the encoded output bit stream.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: September 3, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang
  • Patent number: 10404517
    Abstract: A communication device receives a physical layer (PHY) data unit that includes i) a first orthogonal frequency division multiplexing (OFDM) symbol corresponding to a legacy signal field of a PHY preamble, and ii) a second OFDM symbol that immediately follows the first OFDM symbol. The communication device determines a first bit sequence corresponding to the first OFDM symbol and a second bit sequence corresponding to the second OFDM symbol. The communication device unscrambles the second bit sequence to obtain an unscrambled second bit sequence, and determines whether the unscrambled second bit sequence matches the first bit sequence. If the unscrambled second bit sequence matches the first bit sequence, the communication device decodes the PHY data unit according to a first communication protocol, and if the unscrambled second bit sequence does not match the first bit sequence, decodes the PHY data unit according to a second communication protocol.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: September 3, 2019
    Assignee: Marvell International Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang
  • Patent number: 10405325
    Abstract: Embodiments described herein provide a method for resource unit signaling with reduced data bits in a wireless local area network. At a wireless transceiver, a data frame may be obtained for transmission. The data frame includes a first preamble portion and a second preamble portion compliant with a wireless local area network communication protocol. When an available resource unit for transmitting the data frame is less than an allowed bandwidth, the first preamble portion and the second preamble portion may be configured with resource unit signaling bits. When the available resource unit is greater than or equal to the allowed bandwidth, the resource unit may be virtually divided into a plurality of channels. At least one of the first preamble portion and the second preamble portion may be configured with a first number of bits representing a number of users spatially multiplexed on a channel from the plurality of channels.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: September 3, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Yakun Sun, Hongyuan Zhang
  • Publication number: 20190268449
    Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit to be transmitted via a communication channel, the PHY data unit conforming to a first communication protocol. Generating the PHY preamble includes generating a legacy portion of the PHY preamble to include a legacy signal field, which is decodable by one or more second communication devices that conform to a second communication protocol to determine a duration of the PHY data unit. The PHY preamble is generated to also include a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
    Type: Application
    Filed: May 13, 2019
    Publication date: August 29, 2019
    Inventors: Hongyuan ZHANG, Mingguang XU, Yakun SUN
  • Publication number: 20190261418
    Abstract: A client station receives from an access point (AP) a downlink packet that includes a trigger frame that is configured to prompt the client station to transmit an uplink packet to the AP. The trigger frame includes an indication of whether the client station is required to perform a channel sensing procedure to determine if one or more subchannels are not idle prior to transmitting the uplink packet. In response to the trigger frame indicating that the client station is required to perform the channel sensing procedure: the client station does not transmit the uplink packet in response to determining that the one or more subchannels are not idle. In response to the trigger frame indicating that the client station is not required to perform the channel sensing procedure, the client station transmits the uplink packet without measuring the one or more energy levels in the one or more subchannels.
    Type: Application
    Filed: May 6, 2019
    Publication date: August 22, 2019
    Inventors: Liwen CHU, Lei Wang, Jinjing Jiang, Yakun Sun, Hongyuan Zhang, Hui-Ling Lou
  • Patent number: 10390328
    Abstract: A beamforming training packet is transmitted from a first communication device to multiple second communication devices. A trigger frame is generated at the first communication device to trigger an uplink orthogonal frequency division multiple access (OFDMA) transmission of beamforming training feedback from at least some of the multiple second communication devices. After transmission of the beamforming training packet by the first communication device, the trigger frame is transmitted to the at least some of the multiple communication devices. The uplink OFDMA transmission is then received at the first communication device. The uplink OFDMA transmission includes respective beamforming training feedback packets generated based on the beamforming training packet by respective ones of the at least some of the multiple second communication devices. The respective beamforming training feedback packets are simultaneously transmitted by the at least some of the multiple second communication devices.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: August 20, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Hongyuan Zhang, Lei Wang, Yakun Sun, Jinjing Jiang, Hui-Ling Lou
  • Patent number: 10382598
    Abstract: A first format according to which a PHY data unit is to be generated is selected. The data unit is generated according to the first format, including generating a PHY preamble of the PHY data unit to include a first field and a second field. The PHY preamble is generated so that one or more OFDM symbols are rotated by 90 degrees with respect to other OFDM symbols in the PHY preamble to signal the first format. Or, the first field is generated to include a set of bits that according to an error detection scheme that does not conform to a second format; or the set of information bits indicates a mode not supported in connection with the second format. Or, a duplicate of at least one of the first field and the second field is included in the PHY preamble, to signal the first format.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: August 13, 2019
    Assignee: Marvell International Ltd.
    Inventors: Hongyuan Zhang, Yakun Sun, Lei Wang
  • Patent number: 10383054
    Abstract: Accordingly, systems and methods for managing power when the number of training and data tones are increased in a wireless communications system are provided. An L-SIG field is generated that includes a set of data and pilot tones, wherein the pilot tones are inserted between the data tones in the set of data and pilot tones. A plurality of training tones is added to the L-SIG field before and after the set of data and pilot tones. A symbol is generated that includes the L-SIG field, an L-LTF field, and a data field, wherein the training tones of the L-SIG field provide channel estimates for the data field. Power of the L-LTF field is managed relative to power of the L-SIG field in the generated symbol in a time domain.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: August 13, 2019
    Assignee: Marvell International Ltd.
    Inventors: Hongyuan Zhang, Mingguang Xu, Yakun Sun
  • Publication number: 20190245659
    Abstract: A first communication device generates a physical layer (PHY) preamble of a PHY data unit. A signal field of the PHY preamble includes i) a common block of information bits having information for multiple second communication devices and ii) a plurality of user blocks of information bits, each user block having information for a respective one of the multiple second communication devices. The common block includes a frequency resource unit allocation field that defines a plurality of frequency resource units corresponding to a PHY payload of the PHY data unit. The user blocks respectively correspond to frequency resource units defined by the frequency resource unit allocation field. Each user block includes an indication of a modulation and coding scheme (MCS) used in the corresponding frequency resource unit. Each group of two user blocks is encoded as a respective second encoded block to allow the multiple second communication devices to efficiently decode the signal field.
    Type: Application
    Filed: April 15, 2019
    Publication date: August 8, 2019
    Inventors: Yakun SUN, Lei WANG, Jinjing JIANG, Liwen CHU, Hongyuan ZHANG
  • Patent number: 10375679
    Abstract: Multiple trigger frames are generated at a first communication device to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices. The multiple trigger frames include a broadcast trigger frame that includes information to indicate transmission parameters for a first subset of the second communication devices, and one or more unicast trigger frames, each of the one or more unicast trigger frame including information to indicate transmission parameters for a particular second communication device in a second subset of the second communication devices. The broadcast trigger frame is transmitted, in a first frequency portion of a downlink OFDMA transmission, to the first subset of the second communication devices, and respective unicast trigger frames are transmitted, in respective second frequency portions of the downlink OFDMA transmission, to the second subset of the second communication devices.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: August 6, 2019
    Assignee: Marvell World Trade Ltd.
    Inventors: Liwen Chu, Yakun Sun, Hongyuan Zhang, Lei Wang, Jinjing Jiang, Hui-Ling Lou
  • Patent number: 10374840
    Abstract: Systems and techniques relating to repeated signal detection are described. A described system includes a receiver to receive a frame including first and second portions, the first portion including first and second signal fields; a detector to determine a first decision metric component based on a hypothesis that the second signal field is a repeated version of the first signal field, determine a second decision metric component based on a hypothesis that the second signal field is not the repeated version, and make a determination, based on the first and second decision metric components, of whether the second signal field is the repeated version; and a decoder to process the second portion in accordance with a first format if the second signal field is not the repeated version, and to decode the second portion in accordance with a second format if the second signal field is the repeated version.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: August 6, 2019
    Assignee: MARVELL INTERNATIONAL LTD.
    Inventors: Yakun Sun, Mingguang Xu, Hongyuan Zhang
  • Publication number: 20190239226
    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: January 30, 2019
    Publication date: August 1, 2019
    Inventors: Liwen CHU, Lei WANG, Hongyuan ZHANG, Yakun SUN, Jinjing JIANG, Hui-Ling LOU
  • Publication number: 20190238299
    Abstract: A first communication device receives an uplink orthogonal frequency multiple access (OFDMA) transmission. The uplink OFDMA transmission includes respective transmissions from multiple second communication devices, and the respective transmissions from the multiple second communication devices include indications of respective acknowledgment policies corresponding to the respective transmissions from the multiple second communication devices. The first communication device generates one or more acknowledgment physical layer (PHY) data units to acknowledge at least a portion of the uplink OFDMA transmission, where the one or more acknowledgment PHY data units do not comply with at least one of the acknowledgment policies corresponding to the uplink OFDMA transmission. The first communication device transmits the one or more acknowledgment PHY data units to acknowledge the at least the portion of the uplink OFDMA transmission.
    Type: Application
    Filed: April 8, 2019
    Publication date: August 1, 2019
    Inventors: Liwen CHU, Lei WANG, Hongyuan ZHANG, Yakun SUN, Jinjing JIANG, Hui-Ling LOU
  • Publication number: 20190235878
    Abstract: The embodiments of the present disclosure disclose a virtual reality device and a method for configuring a virtual reality device. The virtual reality device comprises: at least one switching circuit and a display circuit. Each of the switching circuits comprises a first input port, a second input port, and an output port. The first input port and the second input port are both configured to input signals, respectively, and each of the switching circuits is configured to control an output port of the switching circuit to output a signal corresponding to a first input port or a second input port of the switching circuit to the display circuit.
    Type: Application
    Filed: September 5, 2018
    Publication date: August 1, 2019
    Inventors: Lin Lin, Jian Sun, Ziqiang Guo, Yakun Wang
  • Publication number: 20190229969
    Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is generated with a first OFDM tone spacing. The communication device generate a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is generated with a second OFDM tone spacing that is a fraction 1/N of the first OFDM tone spacing, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is generated with the second OFDM tone spacing.
    Type: Application
    Filed: March 29, 2019
    Publication date: July 25, 2019
    Inventors: Hongyuan ZHANG, Yakun SUN, Mingguang XU, Rui CAO, Hui-Ling LOU
  • Publication number: 20190230197
    Abstract: Embodiments described herein provides a system for detecting data received in a low power low rate (LPMR) data frame format. The system includes a receiver and control circuitry. The receiver is configured to receive a data frame comprising an LPLR preamble portion and an LPLR data portion following the LPLR preamble portion. The LPLR preamble portion and the LPLR data portion occupy a bandwidth that is less than an allowed bandwidth. The control circuitry is configured to determine a mode of the data frame based on whether the data frame has an additional portion, and detect data field in the LPLR preamble portion from the data frame based on the mode of the data frame.
    Type: Application
    Filed: December 19, 2018
    Publication date: July 25, 2019
    Inventors: Yakun Sun, Hongyuan Zhang, Lei Wang, Hui-Ling Lou