Patents by Inventor Xiaohang CHEN

Xiaohang CHEN 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: 20210099266
    Abstract: The present disclosure provides an information transmission method, a network device and a terminal. The information transmission method includes: receiving an uplink signal, the uplink signal including a target DMRS; and determining uplink data for a terminal in accordance with the target DMRS in the uplink signal. The terminal corresponds to at least two DMRS identities, and the target DMRS is one of DMRSs indicated by the at least two DMRS identities.
    Type: Application
    Filed: December 14, 2020
    Publication date: April 1, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO., LTD.
    Inventors: Xiaohang CHEN, Peng Sun, Zhi Lu
  • Publication number: 20210067390
    Abstract: An uplink transmission method and a terminal are provided. The uplink transmission method is applied to a terminal and includes: acquiring at least one piece of demodulation reference signal (DMRS) configuration information and at least one multiple access signature configured by a network device; selecting a piece of target DMRS configuration information and a target multiple access signature, which have a corresponding relationship, from the at least one piece of DMRS configuration information and the at least one multiple access signature, and performing an uplink transmission; where one piece of DMRS configuration information corresponds to one multiple access signature, and different multiple access signatures correspond to different pieces of DMRS configuration information.
    Type: Application
    Filed: September 29, 2020
    Publication date: March 4, 2021
    Inventors: Xiaohang CHEN, Peng SUN, Xueming PAN
  • Publication number: 20210058980
    Abstract: This disclosure provides an uplink signal transmission method and user equipment and relates to the field of communications technologies. The uplink signal transmission method includes: selecting, by the user equipment, a CP from a preset cyclic prefix CP candidate set to send an uplink transmission signal, where the CP candidate set includes at least two types of CPs of different lengths.
    Type: Application
    Filed: September 25, 2020
    Publication date: February 25, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO., LTD.
    Inventors: Xiaohang CHEN, Peng SUN, Hao LIU
  • Publication number: 20210058196
    Abstract: A method for determining a HARQ-ACK feedback time, a method for indicating a HARQ-ACK feedback time, a terminal device, and a network device are provided. The method includes: receiving a downlink control signaling, wherein the downlink control signaling carries a HARQ-ACK feedback time parameter, and the downlink control signaling is used to activate a downlink semi-persistent scheduling configuration; receiving semi-persistent scheduling data for downlink transmission on a first time-domain resource; and determining the HARQ-ACK feedback time of the semi-persistent scheduling data for the downlink transmission, based on the HARQ-ACK feedback time parameter and the first time-domain resource.
    Type: Application
    Filed: January 11, 2019
    Publication date: February 25, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO., LTD
    Inventors: Xiaohang CHEN, Zichao JI, Zhi LU
  • Patent number: 10911982
    Abstract: The present invention is designed to prevent communication performance from dropping in long TTI when preemption of long TTI by short TTI occurs. According to one aspect of the present invention, a user terminal has a receiving section that receives downlink (DL) data based on downlink control information (DCI) in a first transmission time interval (TTI), a transmission section that transmits delivery acknowledgement information in response to the DL data, and a control section that controls timing of transmitting the delivery acknowledgement information when indication information regarding preemption of the first TTI by a second TTI shorter than the first TTI is received in the receiving section.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: February 2, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Qun Zhao, Xiaohang Chen, Xiaolin Hou, Huiling Jiang
  • Patent number: 10912039
    Abstract: Provided are a method for controlling a transmission power, a mobile station and a base station. The method for controlling the transmit power can be applied to a mobile station, and the method includes: acquiring a power control pattern, which is information related to a scheme of controlling the transmission power; determining a reference power control parameter for the mobile station according to the power control pattern; and determining the transmission power of the mobile station based on the reference power control parameter. The method for controlling the transmission power according to the embodiments of the present disclosure enables the user equipment to transmit signals to the base station at a proper transmission power, and further enables the base station side to distinguish different user equipments according to differences of received powers of a plurality of users that adopt Non-orthogonal Multiple Access.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: February 2, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Xiaohang Chen, Anxin Li, Qin Mu, Liu Liu, Huiling Jiang, Satoshi Nagata
  • Publication number: 20210022134
    Abstract: A method and a device for canceling an uplink transmission are provided. The method includes: when receiving an uplink transmission cancelation indication, determining a first starting time, where the first starting time is a starting time of a reference time region; and determining, based on the first starting time, a target time region for canceling the uplink transmission.
    Type: Application
    Filed: March 11, 2019
    Publication date: January 21, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Zhi LU, Xueming PAN
  • Publication number: 20210021385
    Abstract: The present disclosure in some embodiments provides a transmission method and a transmission device. The transmission method includes, in a case that a same first HARQ process is used by a dynamic-grant PUSCH and a configured-grant PUSCH, transmitting one of the configured-grant PUSCH and the dynamic-grant PUSCH using the first HARQ process, or transmitting the configured-grant PUSCH or the dynamic-grant PUSCH using the first HARQ process and then transmitting the dynamic-grant PUSCH or the configured-grant PUSCH using the first HARQ process.
    Type: Application
    Filed: January 16, 2019
    Publication date: January 21, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Xueming PAN, Zhi LU
  • Publication number: 20210021383
    Abstract: A method for determining a HARQ-ACK codebook and a user equipment are provided. The method for determining the HARQ-ACK codebook includes: determining an HARQ-ACK codebook based on code block group configuration of a BWP where at least one PDSCH corresponding to the HARQ-ACK codebook is located; or, determining an HARQ-ACK codebook based on code block group configuration of a BWP where a PDCCH scheduling at least one PDSCH corresponding to the HARQ-ACK codebook is located.
    Type: Application
    Filed: February 2, 2019
    Publication date: January 21, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Xueming PAN
  • Publication number: 20210014036
    Abstract: A method of monitoring an uplink transmission cancellation instruction and a terminal are provided. The method of monitoring an uplink transmission cancellation instruction is applied to a terminal and includes: when the terminal switches a BWP, determining, according to first preset configuration information, whether to perform monitoring of uplink transmission cancellation instruction during a BWP switching process; when the monitoring of the uplink transmission cancellation instruction is determined to be performed, monitoring the uplink transmission cancellation instruction during the BWP switching process; when the monitoring of the uplink transmission cancellation instruction is determined not to be performed, not monitoring the uplink transmission cancellation instruction during the BWP switching process.
    Type: Application
    Filed: September 28, 2020
    Publication date: January 14, 2021
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Xueming PAN
  • Patent number: 10893507
    Abstract: A method for notifying a repetition pattern of uplink data, a method for determining a repetition pattern of uplink data, and a corresponding user equipment (UE) and base station are provided, wherein the base station is notified of a repetition pattern selected by the UE, so that the base station can correctly determine a transmitting timing of feedback information, thereby preventing a problem in which a transmitting timing of expected feedback information of the UE is inconsistent with the transmitting timing of the feedback information determined by the base station.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: January 12, 2021
    Assignee: NTT DOCOMO, INC.
    Inventors: Qin Mu, Liu Liu, Xiaohang Chen, Anxin Li, Huiling Jiang, Satoshi Nagata
  • Publication number: 20200404650
    Abstract: A UCI transmission method and a mobile terminal are provided, which relate to the field of communication technology and are used for ensuring normal transmission of UCI. The method includes: in a case that at least one of K first time-domain resources aggregated in a time domain on an uplink data channel conflicts with a second time-domain resource on an uplink control channel for carrying UCI, transmitting the UCI on M ones of the K first time-domain resources; K is an integer greater than 1, M is a positive integer less than or equal to K. Normal transmission of the UCI may be ensured by carrying the UCI on at least one first time-domain resource, when a time conflict occurs between time-domain resources aggregated in time domain on an uplink data channel and a time-domain resource on an uplink control channel for carrying the UCI.
    Type: Application
    Filed: January 8, 2019
    Publication date: December 24, 2020
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Zhi LU, Na LI
  • Publication number: 20200302806
    Abstract: A method for monitoring an unmanned aerial vehicle (UAV) includes a processor generating a datagram based on monitoring data for a UAV-detector communication between the UAV and one or more detectors. The monitoring data indicates at least one of a location of the UAV or a location of a control station in communication with the UAV. The method further includes the processor encrypting working data for a UAV-control station communication between the UAV and the control station using an encryption key known to the control station but now known to the one or more detectors, and a transmitter transmitting the datagram along with encrypted working data. The datagram is to be received by the one or more detectors and the encrypted working data is to be received and deciphered by the control station using the encryption key.
    Type: Application
    Filed: June 7, 2020
    Publication date: September 24, 2020
    Inventors: Ming GONG, Bingzhen YANG, Zhongqian YOU, Guohao ZHAN, Peng XIE, Xiaohang ZHONG, Naibo WANG, Xingsen LIN, Xiongbin RAO, Renqin DENG, Wenyue CHEN, Mingyu WANG
  • Patent number: 10764856
    Abstract: The present application provides an uplink data transmission method and a user terminal (UE) for executing the method. The method in the present application comprises: A, generating a first random number; B, determining, according to the generated first random number, whether to initiate a random access process; if the random access process is initiated, obtaining a timing advance (TA) value from a base station by means of the random access process; and if the random access process is not initiated, listening for a TA message broadcast by another UE and obtaining a TA value from the TA message; C, transmitting uplink data according to the obtained TA value; D, if the uplink data is successfully transmitted, continuing to perform E, and if the uplink data is unsuccessfully transmitted, returning to A; and E, generating a TA message according to the obtained TA value, and broadcasting the generated TA message.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: September 1, 2020
    Assignee: NTT DoCoMo, Inc.
    Inventors: Neng Ye, Xiangming Li, Anxin Li, Xiaohang Chen, Qun Zhao, Huiling Jiang
  • Patent number: 10750527
    Abstract: The present invention is designed to provide a user terminal and a radio communication method, whereby adequate communication can be performed when contention-based UL transmission is employed. A user terminal according to the present invention has a transmission section that transmits UL data and a reference signal without a UL transmission command from a radio base station, and control section that controls transmission of the UL data and the reference signal, and the control section applies a reference signal that can identify the user terminal, as the reference signal, and controls transmission of the UL data and the reference signal by using predetermined resources that are configured in advance.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: August 18, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Shimpei Yasukawa, Satoshi Nagata, Xiaohang Chen, Qun Zhao
  • Publication number: 20200245319
    Abstract: The present disclosure provides an information transmission method, a terminal and a base station. The information transmission method is applied to a terminal and includes: carrying uplink control information on at least one control region of a grant-free resource; and transmitting the uplink control information carried on the grant-free resource to a base station.
    Type: Application
    Filed: August 9, 2018
    Publication date: July 30, 2020
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Xueming PAN
  • Publication number: 20200228147
    Abstract: The present application provides a data transmission method which includes: obtaining statistical characteristics of interferences; determining a total number of coding layers of multi-layer coding and a code rate and transmitting power of each coding layer according to the statistical characteristics of the interferences; processing to-be-transmitted information bits through data re-organization according to the determined total number of coding layers of the multi-layer coding to obtain information bits of each coding layer; coding the information bits of each coding layer respectively according to the determined code rate of each coding layer to obtain a coded data stream of each coding layer; processing the coded data stream of each coding layer through layer mapping and modulation according to the determined transmitting power of each coding layer to obtain a symbol stream to be transmitted; and transmitting the symbol stream to be transmitted.
    Type: Application
    Filed: April 4, 2018
    Publication date: July 16, 2020
    Applicant: NTT DoCoMo, Inc.
    Inventors: Neng YE, Xiangming LI, Xiaohang CHEN, Xiaolin HOU
  • Publication number: 20200229229
    Abstract: The present disclosure provides a data transmission method, a data detection method and devices. The data transmission method for a User Equipment (UE) includes: when the UE is configured with at least two grant-free resources, transmitting one transport block (TB) on one grant-free resource or on one grant-free resource group. Each grant-free resource group includes at least two grant-free resources, and the transmission of the TB includes initial transmission and repetition.
    Type: Application
    Filed: August 2, 2018
    Publication date: July 16, 2020
    Applicant: VIVO MOBILE COMMUNICATION CO., LTD.
    Inventors: Xiaohang CHEN, Xueming PAN
  • Publication number: 20200195488
    Abstract: A constellation rotation method is presented. The method includes: determining a statistical characteristic of a received signal of a Base Station (BS) according to a channel coefficient of one or more User Equipments (UEs), at least one of noise information and interference information, the received signal being a signal received by the BS through a physical channel from the one or more UEs; determining a constellation rotation angle of each UE according to the determined statistical characteristic of the received signal; and for each UE, rotating a constellation of a data stream of a UE according to the constellation rotation angle of the UE.
    Type: Application
    Filed: March 20, 2018
    Publication date: June 18, 2020
    Applicant: NTT DoCoMo, Inc.
    Inventors: Neng YE, Xiangming LI, Xiaohang CHEN, Xiaolin HOU, Qun ZHAO, Huiling JIANG
  • Publication number: 20200196245
    Abstract: Provided are a method for controlling a transmission power, a mobile station and a base station. The method for controlling the transmit power can be applied to a mobile station, and the method includes: acquiring a power control pattern, which is information related to a scheme of controlling the transmission power; determining a reference power control parameter for the mobile station according to the power control pattern; and determining the transmission power of the mobile station based on the reference power control parameter. The method for controlling the transmission power according to the embodiments of the present disclosure enables the user equipment to transmit signals to the base station at a proper transmission power, and further enables the base station side to distinguish different user equipments according to differences of received powers of a plurality of users that adopt Non-orthogonal Multiple Access.
    Type: Application
    Filed: August 16, 2017
    Publication date: June 18, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Xiaohang CHEN, Anxin LI, Qin MU, Liu LIU, Huiling JIANG, Satoshi NAGATA