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: 20200196297
    Abstract: Provided are a resource determination method, a base station and a mobile station. A resource determination method performed by the base station according to embodiments of the present invention includes: determining a resource configuration used for uplink transmission for each mobile station group in a plurality of mobile station groups corresponding to the base station; determining a resource offset set used for the plurality of mobile station groups, wherein the resource offset set includes a plurality of resource candidate offsets such that a mobile station connected to the base station determines uplink transmission resources for the mobile station according to the resource configuration of the mobile station group to which the mobile station belongs and resource candidate offsets in the resource offset set.
    Type: Application
    Filed: August 18, 2017
    Publication date: June 18, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Xiaohang CHEN, Anxin LI, Qin MU, Liu LIU, Huiling JIANG, Satoshi NAGATA
  • Publication number: 20200178304
    Abstract: A method of configuring an uplink grant-free transmission and a device thereof are provided. The method includes: acquiring a transmission location of an uplink grant-free transmission according to a current configuration parameter; acquiring, according to the transmission location, a corresponding subframe time slot, and initiating the uplink grant-free transmission to a network side on the subframe time slot; where the current configuration parameter includes one or more of: a starting location, a subframe internal offset and a transmission period, where the starting location includes a starting location indicated by a system frame number and a subframe number or a starting location indicated by a subframe number.
    Type: Application
    Filed: June 15, 2018
    Publication date: June 4, 2020
    Inventors: Xiaohang CHEN, Xiaodong YANG
  • Publication number: 20200169987
    Abstract: A data transmission method and a device are provided. The data transmission method is applied to a terminal and includes: in the case that both a grant-free resource and a grant-based resource are available for the terminal, choosing, by the terminal, to transmit service data on the grant-free resource preferentially; or choosing, by the terminal, to transmit service data on the grant-based resource preferentially; or choosing dynamically, by the terminal, to transmit service data on the grant-free resource and/or the grant-based resource.
    Type: Application
    Filed: August 6, 2018
    Publication date: May 28, 2020
    Applicant: VIVO MOBILE COMMUNICATION CO.,LTD.
    Inventors: Xiaohang CHEN, Xueming PAN, Wei BAO
  • Publication number: 20200163024
    Abstract: Provided are an information configuration method, a power adjustment method, a base station, and a mobile terminal. The information configuration method comprises: configuring, according to a transmission parameter of an uplink transmission channel, a power adjustment parameter corresponding to the transmission parameter, the power adjustment parameter being used by a mobile terminal to adjust a transmission power of the uplink transmission channel; and transmitting the power adjustment parameter to the mobile terminal.
    Type: Application
    Filed: May 2, 2018
    Publication date: May 21, 2020
    Applicant: VIVO MOBILE COMMUNICATION CO., LTD.
    Inventors: Na LI, Xiaodong Shen, Xiaohang Chen, Dajie JIANG, Kai WU, Xiaodong Sun
  • Publication number: 20200146039
    Abstract: In order to communicate properly when using contention-based UL transmission that adopts repetition transmission, according to one aspect of the present invention, a terminal has a transmission section that transmits UL data without a UL transmission command from a radio base station, and a control section that controls repetition transmission of the UL data by using a transport block (TB), and, when the UL data is transmitted using a plurality of TBs, the control section at least time-division-multiplexes, frequency-division-multiplexes or code-division-multiplexes each TB.
    Type: Application
    Filed: March 23, 2017
    Publication date: May 7, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Xiaohang Chen, Qun Zhao, Xiaolin Hou, Huiling Jiang
  • Publication number: 20200100282
    Abstract: The present disclosure provides a grant-free transmission method, a user equipment, and a base station. The grant-free transmission method at a user equipment side includes: step a, sending a first multiple access signature selected by a user equipment to a base station; step b, receiving an intervention result of the base station for the user equipment; step c, determining, when the intervention result is to adopt the first multiple access signature, to adopt the first multiple access signature for data transmission; and step d, determining, when the intervention result is to adopt a second multiple access signature, to adopt the second multiple access signature for the data transmission. According to the grant-free transmission method, the user equipment, and the base station provided by the present disclosure, the collision during the grant-free transmission is avoided or reduced with less signaling overhead.
    Type: Application
    Filed: February 28, 2018
    Publication date: March 26, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Neng YE, Xiangming LI, Xiaohang CHEN, Xiaolin HOU, Qun ZHAO, Huiling JIANG
  • Publication number: 20200067659
    Abstract: Embodiments of the present invention provide a transmission method used in uplink hybrid automatic repeat request (HARQ) transmission, a base station, and a mobile station. The transmission method used in uplink hybrid automatic repeat request (HARQ) transmission, which is applied to a base station, includes: receiving uplink transmission information sent from one or more terminal devices (UEs), the uplink transmission information sent by each UE comprising identifier information and data information of the UE; detecting the identifier information of the one or more UEs according to the uplink transmission information; and when identifier information that is not properly detected according to the uplink transmission information exists, sending a common failure response signal to multiple UEs connected to the base station.
    Type: Application
    Filed: January 8, 2018
    Publication date: February 27, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Xiaohang CHEN, Anxin LI, Qun ZHAO, Huiling JIANG
  • Publication number: 20200015251
    Abstract: The present invention is designed so that, even when it is allowed to make interrupts with data in a radio communication system, the deterioration of communication quality can be reduced. A receiving section that receives a UL transmission command, and a control section that controls transmission of UL data, after a predetermined timing, in response to the UL transmission command, are provided, and, when information that indicates puncturing of at least part of the UL data is received, the control section applies puncturing to the UL data. The receiving section receives the information that indicates puncturing, after the UL transmission command is received, by a timing a predetermined period before the transmission of the UL data.
    Type: Application
    Filed: February 2, 2018
    Publication date: January 9, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Qun Zhao, Xiaohang Chen, Lihui Wang
  • Publication number: 20200015119
    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: Application
    Filed: March 2, 2017
    Publication date: January 9, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Qun Zhao, Xiaohang Chen, Xiaolin Hou, Huiling Jiang
  • Publication number: 20190357243
    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: Application
    Filed: February 2, 2018
    Publication date: November 21, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Shimpei Yasukawa, Satoshi Nagata, Xiaohang Chen, Qun Zhao
  • Publication number: 20190230630
    Abstract: Disclosed are 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 and base station. The method for notifying a repetition pattern of uplink data includes: selecting one of a plurality of repetition patterns as a repetition pattern of uplink data; and explicitly or implicitly notifying a base station of the selected repetition pattern by the uplink data. The method for determining a repetition pattern of uplink data includes: receiving uplink data; and determining a repetition pattern of the uplink data according to information included in the uplink data or a transmitting manner of the uplink data.
    Type: Application
    Filed: August 17, 2017
    Publication date: July 25, 2019
    Applicant: NTT DOCOMO, INC.
    Inventors: Qin MU, Liu LIU, Xiaohang CHEN, Anxin LI, Huiling JIANG, Satoshi NAGATA
  • Publication number: 20190215792
    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: Application
    Filed: July 7, 2017
    Publication date: July 11, 2019
    Applicant: NTT DoCoMo, Inc.
    Inventors: Neng YE, Xiangming LI, Anxin LI, Xiaohang CHEN, Qun ZHAO, Huiling JIANG
  • Patent number: 10298308
    Abstract: Embodiments of present invention provide a method for optimizing the rank of channel matrix, a wireless base and a mobile station. The method for optimizing the rank of channel matrix according to an embodiment of the present invention is applied to a wireless base to which multiple mobile stations are connected. The method includes: obtaining the historical state data of the multiple mobile stations; determining the optimal rank of channel matrix of a first mobile station of the multiple mobile stations according to the obtained historical state data of the multiple mobile stations; and transmitting to the first mobile station the optimal rank indicator indicating the optimal rank so as to cause the first mobile station to set its rank of channel matrix to be the optimal rank indicated by the optimal rank indicator.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: May 21, 2019
    Assignee: NTT DoCoMo, Inc.
    Inventors: Xiaohang Chen, Anxin Li, Huiling Jiang
  • Patent number: 10212709
    Abstract: Embodiments of the present disclosure provide a radio base station, a mobile station and a method for determining a transmitting power. A radio base station, according to an embodiment of the present disclosure, is connected with a plurality of mobile stations, wherein a first mobile station in the plurality of mobile stations can form at least one mobile station pair with other mobile stations. The radio base station comprises: a processing unit, configured to determine an initial value of a power factor of each mobile station pair according to state data of respective mobile stations in the mobile station pair, and determine an adjustment value of the power factor for the first mobile station according to state data of the first mobile station; and a transmitting unit, configured to transmit the initial value of the at least one mobile station pair and the adjustment value to the first mobile station.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: February 19, 2019
    Assignee: NTT DoCoMo, Inc.
    Inventors: Xiaohang Chen, Anxin Li, Huiling Jiang
  • Patent number: 9967861
    Abstract: The embodiments of the present invention provide an uplink resource scheduling method, a wireless base station and a mobile station. The method comprises: generating group dedicated signaling respectively for mobile station groups managed by the wireless base station, wherein group dedicated signaling of each mobile station group indicates uplink resources allocated to the mobile station group; multiplexing the generated group dedicated signaling into different positions of a first channel and transmitting the multiplexed group dedicated signaling; generating mobile station dedicated signaling for each mobile station in each of the mobile station groups, wherein the mobile station dedicated signaling at least includes group information indicating the mobile station group to which the mobile station belongs; and multiplexing the generated mobile station dedicated signaling into a second channel and transmitting the multiplexed mobile station dedicated signaling.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: May 8, 2018
    Assignee: NTT DoCoMo, Inc.
    Inventors: Xiaohang Chen, Anxin Li, Atsushi Harada
  • Publication number: 20160261324
    Abstract: Embodiments of present invention provide a method for optimizing the rank of channel matrix, a wireless base and a mobile station. The method for optimizing the rank of channel matrix according to an embodiment of the present invention is applied to a wireless base to which multiple mobile stations are connected. The method includes: obtaining the historical state data of the multiple mobile stations; determining the optimal rank of channel matrix of a first mobile station of the multiple mobile stations according to the obtained historical state data of the multiple mobile stations; and transmitting to the first mobile station the optimal rank indicator indicating the optimal rank so as to cause the first mobile station to set its rank of channel matrix to be the optimal rank indicated by the optimal rank indicator.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 8, 2016
    Applicant: NTT DoCoMo, Inc.
    Inventors: Xiaohang Chen, Anxin Li, Huiling Jiang
  • Publication number: 20160262158
    Abstract: Embodiments of the present disclosure provide a radio base station, a mobile station and a method for determining a transmitting power. A radio base station, according to an embodiment of the present disclosure, is connected with a plurality of mobile stations, wherein a first mobile station in the plurality of mobile stations can form at least one mobile station pair with other mobile stations. The radio base station comprises: a processing unit, configured to determine an initial value of a power factor of each mobile station pair according to state data of respective mobile stations in the mobile station pair, and determine an adjustment value of the power factor for the first mobile station according to state data of the first mobile station; and a transmitting unit, configured to transmit the initial value of the at least one mobile station pair and the adjustment value to the first mobile station.
    Type: Application
    Filed: February 29, 2016
    Publication date: September 8, 2016
    Applicant: NTT DoCoMo, Inc.
    Inventors: Xiaohang Chen, Anxin Li, Huiling Jiang
  • Publication number: 20150245320
    Abstract: The embodiments of the present invention provide an uplink resource scheduling method, a wireless base station and a mobile station. The method comprises: generating group dedicated signaling respectively for mobile station groups managed by the wireless base station, wherein group dedicated signaling of each mobile station group indicates uplink resources allocated to the mobile station group; multiplexing the generated group dedicated signaling into different positions of a first channel and transmitting the multiplexed group dedicated signaling; generating mobile station dedicated signaling for each mobile station in each of the mobile station groups, wherein the mobile station dedicated signaling at least includes group information indicating the mobile station group to which the mobile station belongs; and multiplexing the generated mobile station dedicated signaling into a second channel and transmitting the multiplexed mobile station dedicated signaling.
    Type: Application
    Filed: February 18, 2015
    Publication date: August 27, 2015
    Applicant: NTT DoCoMo, Inc.
    Inventors: Xiaohang CHEN, Anxin LI, Atsushi HARADA