Patents by Inventor Leiming Zhang

Leiming Zhang 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: 10367556
    Abstract: A method for measuring and feeding back channel information and a corresponding apparatus are provided. In an embodiment the method includes determining, by a first network device, a first codebook from a first codebook set, wherein the first codebook set comprises at least two first codebooks, wherein a sub-vector Wx of each first codebook is formed by a zero vector and a non-zero vector, wherein vectors forming the Wx are associated with different groups of antenna ports, wherein each first codebook comprises at least one first sub-vector ? [ V a 0 0 V a 1 0 ] and/or at least one second sub-vector ? [ 0 V b 0 0 V b 1 ] , and wherein Va0 and Va1 are elements in the vector Va, and Vb0 and Vb1 are elements in the vector Vb and sending a codebook index to a second network device, wherein the codebook index is associated with the first codebook selected from the first codebook set.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: July 30, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu
  • Publication number: 20190222288
    Abstract: Embodiments provide a base station, user equipment, and communication signal transmitting and receiving methods. The base station includes: a processing unit, configured to determine a resource configuration of a communication signal, where the resource configuration includes at least two different resource element groups; and a transmitting unit, configured to transmit the communication signal on each resource element group included in the resource configuration to user equipment, where the communication signal transmitted on each resource element group carries at least one piece of same information, and the same information is cell specific or user equipment group specific information.
    Type: Application
    Filed: May 15, 2014
    Publication date: July 18, 2019
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Yongxing ZHOU, Jianguo WANG, Leiming ZHANG, Jianghua LIU
  • Publication number: 20190222386
    Abstract: A data transmission method, including: determining, by a base station, a first PCRS port set and a second PCRS port set in a first scheduling period, where the first PCRS port set includes at least one port used to transmit a PCRS, but the second PCRS port set does not include a port used to transmit a PCRS in the first scheduling period; determining, by the base station, a first time-frequency resource element corresponding to the at least one port used to transmit a PCRS in the first PCRS port set; if a quantity of first time-frequency resource elements is greater than or equal to 1, sending, by the base station, a PCRS to user equipment on the first time-frequency resource element; and sending, by the base station, data to the user equipment on a second time-frequency resource element corresponding to the second PCRS port set.
    Type: Application
    Filed: March 28, 2019
    Publication date: July 18, 2019
    Inventors: Zhiheng GUO, Leiming ZHANG, Xinqian XIE, Xingqing CHENG
  • Patent number: 10326504
    Abstract: A method for measuring and feeding back channel information and a corresponding apparatus are provided. In an embodiment the method includes determining, by a first network device, a first codebook from a first codebook set, wherein the first codebook set comprises at least two first codebooks, wherein a sub-vector Wx of each first codebook is formed by a zero vector and a non-zero vector, wherein vectors forming the Wx are associated with different groups of antenna ports, wherein each first codebook comprises at least one first sub-vector ? [ V a 0 0 V a 1 0 ] and/or at least one second sub-vector ? [ 0 V b 0 0 V b 1 ] , and wherein Va0 and Va1 are elements in the vector Va, and Vb0 and Vb1 are elements in the vector Vb and sending a codebook index to a second network device, wherein the codebook index is associated with the first codebook selected from the first codebook set.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: June 18, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu
  • Publication number: 20190173539
    Abstract: Embodiments of the present invention disclose a signal transmission method, a system, and a device. When measuring a reference signal and determining channel quality, UE obtains a difference between codeword to CSI-RS mapping relationships by using a channel quality measurement model, may calculate an optimized mapping relationship by means of measurement, and determines at least one mapping relationship from these mapping relationships, to adjust a codeword to CSI-RS mapping relationship of a channel, thereby improving system flexibility and increasing channel resource utilization.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 6, 2019
    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu
  • Publication number: 20190173550
    Abstract: Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and a base station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix W from a codebook according to the reference signal, where a column vector of the precoding matrix W may be expressed as ?[v ej?v]T, v=[1 ej?]; and sending a precoding matrix indicator PMI to the base station, where the PMI is corresponding to the selected precoding matrix W. The present invention may further improve quantization precision and achieve balance between overheads and the quantization precision. The base station performs precoding on a sent signal according to a fed back precoding matrix indicator, which can improve precoding precision, thereby improving a data transmission rate and system throughput.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
    Inventors: Jianguo Wang, Yongxing Zhou, Leiming Zhang
  • Publication number: 20190174424
    Abstract: Embodiments of the present invention provide a data transmission method, including: allocating, based on a power ratio value of near user equipment to far user equipment in two paired user equipments, a transmit power to each of the near user equipment and the far user equipment, where the power ratio value is a ratio in a first ratio set, at least one ratio in the first ratio set can be selected from a second ratio set. Therefore, according to the embodiments of the present invention, a plurality of power ratio values of near user equipment to far user equipment in two paired user equipments can be provided, thereby increasing flexibility of a base station for the near user equipment and the far user equipment, and helping increase a performance gain that can be obtained by MUST transmission.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 6, 2019
    Inventors: Xinqian XIE, Zhiheng GUO, Xingqing CHENG, Leiming ZHANG
  • Publication number: 20190173548
    Abstract: This application relates to the field of mobile communications, and in particular, to technologies of obtaining channel state information in a wireless communications system. In a channel information obtaining method, a base station obtains channel state matrix information of some channels based on uplink reference information sent by a terminal and partial channel state information of channels between the base station and the terminal, to obtain channel state matrix information of the channels between the base station and the terminal. Base on this method, relatively complete channel state matrix information of the channels between the base station and the terminal can be obtained. This helps the base station select an appropriate parameter to transmit data to the terminal without causing an additional delay, performance loss, or cost increase, or consuming more time-frequency resources used for the uplink reference signal.
    Type: Application
    Filed: January 30, 2019
    Publication date: June 6, 2019
    Inventors: Leiming ZHANG, Jianghua LIU
  • Patent number: 10305558
    Abstract: Embodiments of the present invention disclose a precoding matrix indicator feedback method, receiving method, and apparatus. User equipment UE receives a reference signal sent by a base station; the UE selects, based on the reference signal, a precoding matrix for each first subband of N first subbands in a system transmission bandwidth from a codebook, where the codebook includes at least two precoding matrixes, and each precoding matrix is denoted by at least a first precoding matrix indicator PMI and a second PMI, where each first subband of the N first subbands corresponds to a second PMI, and each second subband of M second subbands corresponds to a first PMI; and the UE feeds back the first PMI corresponding to each second subband to the base station, and feeds back the second PMI corresponding to each first subband to the base station.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: May 28, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Leiming Zhang, Qiang Wu, Jianghua Liu
  • Patent number: 10270499
    Abstract: The present invention provides a data transmission method and device. The method includes: performing, by the first communications equipment, multi-stream data transmission with the second communications equipment according to a first antenna port, where the first antenna port is an antenna port, of the first communications equipment, satisfying a condition for multi-stream data transmission between the first communications equipment and the second communications equipment. The method provided in embodiments of the present invention improves applicability of a multi-stream data transmission system for line of sight propagation.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: April 23, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Leiming Zhang, Kunpeng Liu, Yongxing Zhou
  • Patent number: 10263673
    Abstract: Embodiments of the present invention provide a signal transmission method and device. The method includes: determining, by a sending device, a target precoding matrix V, where V=(H)?1·{tilde over (H)}, H indicates a channel matrix between the sending device and a receiving device, {tilde over (H)} indicates an equivalent channel matrix between the sending device and the receiving device, ({tilde over (H)}H·{tilde over (H)}) or ({tilde over (H)}·{tilde over (H)}H) is a diagonal matrix, and {tilde over (H)} is related to a transmission distance D between the sending device and the receiving device and an element spacing of an antenna of the receiving device; and sending, by the sending device, a signal to the receiving device according to the target precoding matrix V. Because {tilde over (H)} meets a characteristic that ({tilde over (H)}H·{tilde over (H)}) or ({tilde over (H)}·{tilde over (H)}H) is a diagonal matrix, a channel corresponding to {tilde over (H)} can support multiple data stream transmission.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: April 16, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Leiming Zhang, Kunpeng Liu
  • Patent number: 10230443
    Abstract: Embodiments of the present invention provide a method for feeding back channel state information, a user equipment, and abase station, to improve feedback precision of channel state information. The method includes: receiving a reference signal sent by a base station; selecting a precoding matrix W from a codebook according to the reference signal, where a column vector of the precoding matrix W may be expressed as ?[V ej?v]T, v=[1 ej?]; and sending a precoding matrix indicator PMI to the base station, where the PMI is corresponding to the selected precoding matrix W. The present invention may further improve quantization precision and achieve balance between overheads and the quantization precision. The base station performs precoding on a sent signal according to a fed back precoding matrix indicator, which can improve precoding precision, thereby improving a data transmission rate and system throughput.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: March 12, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jianguo Wang, Yongxing Zhou, Leiming Zhang
  • Patent number: 10205497
    Abstract: Embodiments of the present invention disclose a signal transmission method, a system, and a device. When measuring a reference signal and determining channel quality, UE obtains a difference between codeword to CSI-RS mapping relationships by using a channel quality measurement model, may calculate an optimized mapping relationship by means of measurement, and determines at least one mapping relationship from these mapping relationships, to adjust a codeword to CSI-RS mapping relationship of a channel, thereby improving system flexibility and increasing channel resource utilization.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: February 12, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu
  • Patent number: 10194455
    Abstract: Embodiments of the present invention provide a method for feeding back a channel quality indicator, and a method and an apparatus for sending resource scheduling information. An apparatus for feeding back a channel quality indicator includes: a determining module, configured to determine a feedback granularity of a CQI according to a system bandwidth, a CQI feedback mode, and antenna port quantity information specified by a network device; and a feedback module, configured to feed back the CQI to the network device according to the feedback granularity of the CQI. The method for feeding back a channel quality indicator, and the method and the apparatus for sending resource scheduling information provided in the embodiments of the present invention are used to reduce system overheads.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: January 29, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Qiang Wu, Weijun Sun, Leiming Zhang, Jianghua Liu
  • Publication number: 20190020389
    Abstract: A transmit diversity method, a device, and a system are described herein. The method includes: measuring, by a second network device, channel state information based on a pilot signal, and sending rank index information and precoding matrix index information to a first network device based on the channel state information; receiving, by the first network device, the rank index information and the precoding matrix index information that are sent by the second network device; determining a diversity coding scheme based on the rank index information; determining a precoding matrix based on the precoding matrix index information; and performing transmission processing on to-be-transmitted data based on the diversity coding scheme and the precoding matrix.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 17, 2019
    Inventors: Kunpeng Liu, Qiang Wu, Leiming Zhang
  • Patent number: 10171145
    Abstract: The present invention provides a codebook configuration method and user equipment. The UE receives a reference signal that is of an antenna whose quantity of antenna ports is X and that is sent by a base station and configuration information of a codebook subset restriction for the quantity X of antenna ports, where the configuration information of the codebook subset restriction for the quantity X of antenna ports includes first configuration information and second configuration information; determines, according to the configuration information of the codebook subset restriction for the quantity X of antenna ports, a precoding matrix on which channel measurement and feedback need to be performed; and obtains, by means of measurement according to the reference signal, the precoding matrix on which channel measurement and feedback need to be performed and that is of antenna ports.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: January 1, 2019
    Assignee: Huawei Technologies Co. Ltd.
    Inventors: Kunpeng Liu, Jianghua Liu, Leiming Zhang
  • Publication number: 20180351617
    Abstract: A precoding matrix set determining method and apparatus, and a parameter indication information sending method and apparatus are provided. The precoding matrix set determining method include: determining, by a first network device, a parameter used for determining a precoding matrix set, where the parameter includes at least one of a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, a quantity of vectors in a first codebook set in dual-codebook feedback, and a quantity of vectors in a second codebook set in the dual-codebook feedback, and the parameter is not fixed; and using the parameter to determine the precoding matrix set, where the precoding matrix set includes at least one precoding matrix. By using this solution, flexibility of feeding back a precoding matrix indicator is improved.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 6, 2018
    Inventors: Kunpeng LIU, Leiming ZHANG, Jianghua LIU, Yongxing ZHOU
  • Patent number: 10128928
    Abstract: The present invention discloses a channel state information CSI reporting method and apparatus, and a base station antenna. In the method, at least one precoding matrix is selected from a codebook based on a reference signal sent by a base station, and CSI is sent to the base station. The CSI includes at least one selected precoding matrix indicator PMI, and the PMI is corresponding to the selected at least one precoding matrix. At least one precoding matrix W included in the codebook may be expressed as W=W1W2, where is a Kronecker product, and at least one of W1 or W2 is an antenna selection matrix. Therefore, in embodiments of the present invention, the base station can select, according to the at least one precoding matrix that is fed back, one or more antenna ports to send a signal.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: November 13, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Leiming Zhang, Yongxing Zhou, Jianghua Liu, Kunpeng Liu
  • Publication number: 20180309485
    Abstract: A method for measuring and feeding back channel information and a corresponding apparatus are provided. In an embodiment the method includes determining, by a first network device, a first codebook from a first codebook set, wherein the first codebook set comprises at least two first codebooks, wherein a sub-vector Wx of each first codebook is formed by a zero vector and a non-zero vector, wherein vectors forming the Wx are associated with different groups of antenna ports, wherein each first codebook comprises at least one first sub-vector ? [ V a 0 0 V a 1 0 ] and/or at least one second sub-vector ? [ 0 V b 0 0 V b 1 ] , and wherein Va0 and Va1 are elements in the vector Va, and Vb0 and Vb1 are elements in the vector Vb and sending a codebook index to a second network device, wherein the codebook index is associated with the first codebook selected from the first codebook set.
    Type: Application
    Filed: June 22, 2018
    Publication date: October 25, 2018
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu
  • Patent number: 10063299
    Abstract: A precoding matrix set determining method and apparatus, and a parameter indication information sending method and apparatus are provided. The precoding matrix set determining method include: determining, by a first network device, a parameter used for determining a precoding matrix set, where the parameter includes at least one of a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, a quantity of vectors in a first codebook set in dual-codebook feedback, and a quantity of vectors in a second codebook set in the dual-codebook feedback, and the parameter is not fixed; and using the parameter to determine the precoding matrix set, where the precoding matrix set includes at least one precoding matrix. By using this solution, flexibility of feeding back a precoding matrix indicator is improved.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: August 28, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kunpeng Liu, Leiming Zhang, Jianghua Liu, Yongxing Zhou