Patents by Inventor Xueru Li

Xueru Li 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: 11139936
    Abstract: This application provides a data transmission method, terminal device, and network device. The method includes: sending, by a terminal device, at least one precoded reference signal on at least one reference signal resource corresponding to a first PRG, where different precoding matrixes are used for different reference signals, and the first PRG is a PRG used to transmit a reference signal; receiving, by the terminal device, resource indication information, where the resource indication information indicates a reference signal resource that is corresponding to a second PRG and that is in the at least one reference signal resource, and the second PRG is a PRG used to transmit a physical uplink shared channel (PUSCH); and sending, by the terminal device, a precoded PUSCH on the second PRG based on the resource indication information, where a precoding matrix used for the PUSCH is a precoding matrix used for a reference signal sent on the reference signal resource corresponding to the second PRG.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: October 5, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xianda Liu, Kunpeng Liu, Ruiqi Zhang, Xueru Li
  • Patent number: 11108533
    Abstract: Methods, base station, and receiving device are provided to advance a decoding time of a second codeword. The method performed by a base station includes obtaining a demodulation pilot pattern (DPP) in a transmission time unit, the DPP includes a first DPP of a first codeword and a second DPP of a second codeword; the first DPP indicates a time-frequency resource of each OFDM symbol in a first set, and the second DPP indicates a time-frequency resource of each OFDM symbol in a second set; and an MCS indication value of the first codeword is greater than an MCS indication value of the second codeword; and mapping a pilot signal to a time-frequency resource based on the DPP, and sending the pilot signal, a transmission time of a first OFDM symbol in the first set is before a transmission time of a first OFDM symbol in the second set.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: August 31, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Kunpeng Liu, Xueru Li
  • Patent number: 11101955
    Abstract: Embodiments of this application provide a channel state information transmission method, a terminal device, and a network device. The method includes: sending, by a terminal device, a first reference signal through a first antenna port set, where the first antenna port set includes n antenna ports; receiving, by the terminal device, a second reference signal through a second antenna port set, where the second antenna port set includes N antenna ports, and the first antenna port set is a proper subset of the second.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: August 24, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xueru Li, Jianqin Liu, Kunpeng Liu, Bingyu Qu, Yongxing Zhou
  • Publication number: 20210234584
    Abstract: This application discloses a precoding matrix index (PMI) reporting method, and related communications apparatus and medium. The method includes: determining an rank indicator (RI) and a PMI, where the PMI is used to determine R precoding matrices W1, . . . , WR. An rth precoding matrix Wr in the R precoding matrices satisfies Wr=W1×W2,r, where an lth row of W2,r is obtained by performing DFT transform on an lth row of a matrix V2,r, and R is indicated by the RI. The PMI includes first indication information and second indication information. The first indication information includes location index information. The location index information is used to indicate Km,r element locations tr,m,1, . . . , ?{1, . . . , T} on an mth row of V2,r. The second indication information is used to indicate Km,r complex coefficients at the element locations tr,m,1, . . . , on the mth row of V2,r. V2,r is determined based on the Km,r element locations and the Km,r complex coefficients.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 29, 2021
    Inventors: Xueru LI, Ruiqi ZHANG
  • Publication number: 20210218443
    Abstract: Embodiments of this application provide a precoding matrix indication method, a communications apparatus, and a storage medium. A precoding matrix of each of K frequency-domain units satisfies W=W1×W2, and elements in W2 in the K frequency-domain units are represented by P elements that are relatively few. A terminal device reports third indication information, where the third indication information includes first indication information and the second indication information, and the first indication information and the second indication information are independently encoded. The first indication information is used to indicate the P elements, and the second indication information is used to indicate P. Therefore, the terminal device can adjust a quantity of information bits of the second indication information based on a channel condition change, thereby improving precoding matrix reporting efficiency.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Ruiqi ZHANG, Xueru LI
  • Patent number: 11057085
    Abstract: A bit field indication manner is provided. A first field is determined, where the first field includes T1 bits, at least one of the T1 bits indicates at least two elements {bi0, bi1, . . . , bik} in a set B, the at least one bit further indicates at least one element {?j0, ?j1, . . . , ?jh} in a set ?, and at least one element in {bi0, bi1, . . . , bik} and at least one element in {?j0, ?j1, . . . , ?jh} are used to form a preceding matrix, where the set B={b0, b1, L, bT2?1}, an element in the set B is a vector with a length of N/4, the set ?={?0, ?1, . . . , ?S?1}, an element in ? is a complex number of a unit amplitude.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: July 6, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xueru Li, Ruiqi Zhang
  • Publication number: 20210167829
    Abstract: This application provides a channel state information reporting method and apparatus. The method includes: A terminal device receives M pieces of downlink control information, where first downlink control information in the M pieces of downlink control information indicates a first channel state information configuration, the first channel state information configuration is associated with a first channel state information interference measurement CSI-IM resource group, and the first CSI-IM resource group includes N1 CSI-IM resources, where M and N1 are positive integers, and N1 is greater than 1; and the terminal device measures a target CSI-IM resource, and reports channel state information, where the target CSI-IM resource is determined by the terminal device from the N1 CSI-IM resources based on M, and a quantity of target CSI-IM resources is less than N1.
    Type: Application
    Filed: February 9, 2021
    Publication date: June 3, 2021
    Inventors: Xueru LI, Ruiqi ZHANG, Kunpeng LIU, Xianda LIU, Yongxing ZHOU
  • Publication number: 20210135726
    Abstract: A channel state information reporting method and apparatus are described. The method can include a terminal device obtaining first indication information and sending the first indication information to a network device. The network device receives the first indication information, where the first indication information indicates a differential value between channel state information of a first antenna port set and channel state information of a second antenna port set. The first antenna port set includes x antenna ports of the terminal device, the second antenna port set includes m antenna ports of the terminal device, and the first antenna port set is different from the second antenna port set. The channel state information reporting method and apparatus in embodiments of this application help improve accuracy of channel state information obtained by a network device, and improve data transmission performance.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Inventors: Xueru LI, Ruiqi ZHANG
  • Patent number: 10992405
    Abstract: Embodiments of the present invention disclose a signal receiving method, a signal transmission method, and a device, and relate to the communications field, so as to resolve a problem that a supported quantity of UEs that perform orthogonal code division multiplexing through cyclic shifts is relatively small when a frequency deviation between a center frequency for receiving a signal by UE and a center frequency for transmitting a signal by a base station is greater than a subcarrier spacing used for communication between the base station and the UE. The embodiments of the present invention are used in a signal transmission process.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: April 27, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Bingyu Qu, Xueru Li
  • Patent number: 10965355
    Abstract: This application discloses a precoding matrix index (PMI) reporting method, and related communications apparatus and medium. The method includes: determining an rank indicator (RI) and a PMI, where the PMI is used to determine R precoding matrices W1, . . . , WR. An rth precoding matrix Wr in the R precoding matrices satisfies Wr×W1×W2, r, where an lth row of W2, r is obtained by performing DFT transform on an lth row of a matrix V2,rand R is indicated by the RI. The PMI includes first indication information and second indication information. The first indication information includes location index information. The location index information is used to indicate Km,r element locations tr,m,1, . . . , tr,m,Kmj?{1, . . . , T} on an mth row of V2,r. The second indication information is used to indicate Km,r complex coefficients ar,m,tr,mj at the element locations tr,m,1, . . . , tr,m,kmj on the mth row of V2,r. V2,r is determined based on the Km,r element locations and the Km,r complex coefficients.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: March 30, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xueru Li, Ruiqi Zhang
  • Patent number: 10966255
    Abstract: An access method, a terminal device, and a base station are provided. The method includes: determining, by a terminal device at a current moment, that a preset condition for a link exception is met, and determining that the current moment is within a preconfigured time window; selecting, by the terminal device, one access resource from at least two preconfigured access resources as a target access resource; and sending, by the terminal device, an access signal to the base station by using a time-frequency resource in the target access resource.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: March 30, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kunpeng Liu, Xueru Li, Bingyu Qu
  • Patent number: 10944462
    Abstract: Embodiments of this application provide a data transmission method and apparatus. The method includes: sending, by a network device, first information by using first signaling, where the first information is used to indicate a quantity N of transmitted precoding matrix indicators TPMIs in second signaling; and sending, by the network device, resource scheduling information and the N TPMIs by using the second signaling, where the resource scheduling information is used to indicate n scheduled physical resource blocks PRBs of M PRBs included in a communication bandwidth, all or some of the N TPMIs is used to indicate a precoding matrix of the n PRBs.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: March 9, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xueru Li, Kunpeng Liu
  • Patent number: 10897293
    Abstract: This application provides a method for determining a precoding matrix set, so as to avoid a case in which a relatively large quantity of precoding matrices in a precoding matrix set cannot be used, thereby improving system performance. A terminal device receives indication information from a network device, and determines a second precoding matrix set front a first precoding matrix set whose rank is R based on the indication information. Each precoding matrix W in the first precoding matrix set satisfies W=W1×W2, the second precoding matrix set is a proper subset of the first precoding matrix set, and the second precoding matrix set does not include W=W1×W2 that satisfies the specific condition in the first precoding matrix set.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: January 19, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ruiqi Zhang, Xueru Li
  • Publication number: 20200403667
    Abstract: This application discloses a precoding matrix index (PMI) reporting method, and related communications apparatus and medium. The method includes: determining an rank indicator (RI) and a PMI, where the PMI is used to determine R precoding matrices W1, . . . , WR. An rth precoding matrix Wr in the R precoding matrices satisfies Wr=W1×W2,r, where an lth row of W2,r is obtained by performing DFT transform on an lth row of a matrix V2,r, and R is indicated by the RI. The PMI includes first indication information and second indication information. The first indication information includes location index information. The location index information is used to indicate Km,r element locations tr,m,1, . . . , tr,m,K?{1, . . . , T} on an mth row of V2,r. The second indication information is used to indicate Km,r complex coefficients a at the element locations tr,m,1, . . . , tr,m,K on the mth row of V2,r. V2,r is determined based on the Km,r element locations and the Km,r complex coefficients.
    Type: Application
    Filed: July 22, 2020
    Publication date: December 24, 2020
    Inventors: Xueru LI, Ruiqi ZHANG
  • Publication number: 20200403668
    Abstract: Embodiments of a channel state information (CSI) reporting method and apparatus are disclosed. A method includes: receiving, by a first communications apparatus, reference signals from a second communications apparatus; and performing, by the first communications apparatus, channel measurement based on the reference signals, and sending first CSI to the second communications apparatus in a time unit whose identifier is m, where the first CSI is used to indicate a channel state in a first reference time unit and a channel state in a second reference time unit, where an identifier of the first reference time unit is m?n1, an identifier of the second reference time unit is m?n1?n2, where m, n1, and n2 are integers, and n2 is not equal to 0. This way, matching is improved between CSI applied by a network device and a channel that is at a current moment.
    Type: Application
    Filed: July 30, 2020
    Publication date: December 24, 2020
    Inventors: Ruiqi ZHANG, Xueru LI
  • Publication number: 20200382183
    Abstract: Channel state information (CSI) sending methods, apparatuses, and systems are disclosed. In an implementation, a method comprises: receiving, by a network device from a terminal device, channel state information (CSI) comprising a rank indicator (RI), indication information, and a second precoding matrix indicator (PMI2); determining, by the network device, the RI and the indication information from the CSI; determining, by the network device, the PMI2 based on the RI and the indication information; and determining, by the network device, a precoding matrix W based on the RI and the PMI2, wherein W satisfies W=W1×W2, W is an Nt by L matrix, W1 is an Nt by 2I matrix, W2 is a 2I by L matrix, L is a rank indicated by the RI, Nt is greater than or equal to L, and I is an integer greater than or equal to 1.
    Type: Application
    Filed: August 19, 2020
    Publication date: December 3, 2020
    Inventors: Ruiqi ZHANG, Xueru LI, Di ZHANG
  • Patent number: 10855358
    Abstract: This application provides a channel state information feedback method and an apparatus. The method includes: generating first frequency domain indication information and M1 pieces of first precoding indication information, where the first frequency domain indication information is used to indicate L1 frequency domain subbands in T frequency domain subbands, the T frequency domain subbands are a system bandwidth or a part of the system bandwidth, 1?L1<T, the T frequency domain subbands are in a one-to-one correspondence with T precoding matrices, and a precoding matrix wk corresponding to a kth frequency domain subband satisfies: Wk=W1×W2k, where w1 represents a matrix with Nt rows and R columns, and W2k represents a matrix with R rows and S columns; and w1 represents a matrix with Nt rows and R columns, and W2k represents a matrix with R rows and S columns.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: December 1, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ruiqi Zhang, Kunpeng Liu, Xueru Li
  • Patent number: 10855357
    Abstract: Embodiments of the present invention provide a communication method, a base station, and a terminal device. The method includes: transmitting, by a base station, signals to a terminal device by using n port groups, where each of the n port groups includes at least two ports; and receiving, by the base station, s first linear combination coefficient groups transmitted by the terminal device, where each first linear combination coefficient group includes first linear combination coefficients of one of s port groups, at least one first linear combination coefficient group includes at least two non-zero coefficients, the s first linear combination coefficient groups are used to determine a first precoding matrix, the s port groups are included in the n port groups. This can improve channel feedback precision of the terminal device, and further help improve performance of transmission between the base station and the terminal device.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: December 1, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Xueru Li, Kunpeng Liu, Bingyu Qu
  • Publication number: 20200374869
    Abstract: One example method includes determining, by a terminal device, that at least two physical uplink control channel (PUCCH) resources collide in a time unit n, where n is an integer, and the at least two PUCCH resources include a first resource configured for first uplink control information (UCI) and a second resource configured for second UCI; and determining, by the terminal device, the first resource and a third resource in the time unit n, where the third resource is one of M PUCCH resources, the first resource and the third resource do not include a same orthogonal frequency division multiplexing (OFDM) symbol in time domain, and M is a positive integer greater than or equal to 1, and the first resource is used to carry a part or all of the first UCI, and the third resource is used to carry a part or all of the second UCI.
    Type: Application
    Filed: August 13, 2020
    Publication date: November 26, 2020
    Inventors: Xueru LI, Ruiqi ZHANG
  • Patent number: 10840981
    Abstract: The present invention provides a method for reporting channel state information. The method includes: receiving, by a base station, a first reference signal sent by user equipment; sending, by the base station, a first parameter set and a second reference signal to the user equipment, where the first parameter set is obtained by the base station by measuring the first reference signal; and receiving, by the base station, a third parameter set sent by the user equipment, where the third parameter set includes a relative value between a parameter in a second parameter set and a parameter in the first parameter set, the second parameter set is obtained by the user equipment by measuring the second reference signal, and the third parameter set and the first parameter set are used by the base station to determine a precoding matrix.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: November 17, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xueru Li, Kunpeng Liu