Patents by Inventor Chongning Na

Chongning Na 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).

  • METHOD OF TRANSMITTING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS), BASE STATION, AND USER EQUIPMENT
    Publication number: 20200304193
    Abstract: A method of transmitting Channel State Information (CSI)-Reference Signals (RSs) in a wireless communication system that includes a base station (BS) and a user equipment (UE) includes transmitting, from the BS to the UE, first multiple CSI-RSs in a CSI-RS resource set that consists of CSI-RS resources. The first multiple CSI-RSs are transmitted using the CSI-RS resources, respectively. The CSI-RS resource set is repeated in a time domain or a frequency domain. The transmitting transmits second multiple CSI-RSs in the repeated CSI-RS resource set.
    Type: Application
    Filed: September 28, 2018
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Min Liu, Satoshi Nagata
  • REFERENCE SIGNAL TRANSMISSION METHOD, CHANNEL STATE INFORMATION FEEDBACK METHOD, BASE STATION AND MOBILE STATION
    Publication number: 20200304190
    Abstract: An embodiment of the present invention provides a CSI-RS transmission method, a CSI feedback method, a base station and a mobile station. The transmission method for a base station transmitting a channel state information reference signal (CSI-RS), includes transmitting a first CSI-RS relating to a first antenna port of the base station to a mobile station, forming a second antenna port that is beamformed based on a first CSI feedback received from the mobile station, transmitting a second CSI-RS relating to the second antenna port to the mobile station, and selecting a beam for data transmission to the mobile station, based on a second CSI feedback received from the mobile station.
    Type: Application
    Filed: March 30, 2017
    Publication date: September 24, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Chongning Na, Huiling Jiang, Yuichi Kakishima, Satoshi Nagata
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20200295905
    Abstract: To appropriately control UL transmission such as a CSI reporting when communication is performed by applying a different configuration from those of legacy LTE systems, one aspect of a user terminal according to the present invention includes: a transmitting section that transmits first Channel State Information (CSI) and second CSI of different information types to be reported, by using an uplink control channel and/or an uplink shared channel based on timings respectively configured by a base station; and a control section that, when transmission timings of the first CSI and the second CSI overlap, performs control to transmit both or one of the first CSI and the second CSI.
    Type: Application
    Filed: September 29, 2017
    Publication date: September 17, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Yuichi Kakishima, Huiling Li, Chongning Na, Lihui Wang, Xin Wang
  • USER EQUIPMENT AND TRANSMISSION AND RECEPTION POINT
    Publication number: 20200287677
    Abstract: A user equipment (UE) is disclosed including a receiver that receives at least a reference signal (RS) transmitted using a first beam from a transmission and reception point (TRP), using at least a second beam, and a processor that determines the first beam paired with the second beam based on reception quality of the RSs. The UE further includes a transmitter that transmits feedback information indicating the determined first beam. The second beam is an omni-directional beam. The receiver receives, from the TRP, reception (Rx) beam designation information indicating an Rx beam to receive the RSs, and the second beam is the Rx beam.
    Type: Application
    Filed: March 22, 2018
    Publication date: September 10, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Satoshi Nagata, Kazuaki Takeda
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20200288334
    Abstract: The present disclosure is designed to properly control RLM when beam recovery procedures are expected to be executed. In accordance with one aspect of the present invention, a user terminal has a receiving section that receives information about a hypothetical downlink control channel, and a control section that controls, based on the information, monitoring of radio link quality of a downlink signal in a first set, which is assumed to be quasi-co-located (in QCL) with a demodulation reference signal for a downlink control channel, and/or radio link quality of a downlink signal in a second set, which is configured by a radio base station.
    Type: Application
    Filed: September 11, 2017
    Publication date: September 10, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Chongning Na, Min Liu
  • METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION AND MOBILE STATION
    Publication number: 20200281013
    Abstract: A method is presented for transmitting uplink control information and a mobile station. The method for transmitting the uplink control information includes: adding padding bits to initial control information to generate uplink control information, where the initial control information includes first information having a same number of bits for RANKs of different channel matrices and second information having a same or different number of bits for RANKs of different channel matrices; and transmitting the uplink control information.
    Type: Application
    Filed: July 4, 2018
    Publication date: September 3, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Huiling LI, Xin WANG, Chongning NA, Runxin WANG, Yuichi KAKISHIMA, Satoshi NAGATA
  • Beam information feedback method and user apparatus
    Patent number: 10763938
    Abstract: Provided is a beam information feedback method performed by a user equipment, comprising: determining a first beam and a plurality of second beams according to a beam selection result; transmitting beam indexes of the plurality of second beams to a base station according to the beam power of the plurality of second beams; transmitting wideband beam information correspondingly to the beam indexes of the plurality of second beams; and transmitting subband beam information correspondingly to the beam indexes of the plurality of second beams.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: September 1, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Huiling Li, Chongning Na, Yuichi Kakishima, Satoshi Nagata
  • USER EQUIPMENT PERFORMING BEAM REPORTING
    Publication number: 20200267804
    Abstract: A user equipment (UE) includes a receiver that receives, from a base station (B S), multiple reference signals transmitted using first beams, a processor, and a transmitter. The first beams comprise at least one second beam used for Physical Downlink Control Channel (PDCCH) transmission between the BS and the UE and third beams that are not used for the PDCCH transmission. The processor measures quality of the first beams. The transmitter reports, to the BS, the quality of the at least one second beam and part of the third beams.
    Type: Application
    Filed: September 28, 2018
    Publication date: August 20, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Min Liu, Chongning Na, Satoshi Nagata
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20200266866
    Abstract: A user terminal according to one aspect of the present disclosure includes a transmitting section that transmits channel state information by use of a semi-persistently specified resource, and a control section that controls, in a case of transmitting data during a time duration in which the semi-persistently specified resource is included, transmission of the channel state information and the data. According to one aspect of the present disclosure, SP-CSI reporting can be appropriately controlled.
    Type: Application
    Filed: November 10, 2017
    Publication date: August 20, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Satoshi Nagata, Lihui Wang, Huiling Li, Xiaolin Hou, Chongning Na
  • METHOD FOR WIRELESS COMMUNICATION
    Publication number: 20200259608
    Abstract: A method for wireless communication includes transmitting, from a base station (BS) to a user equipment (UE), multiple Channel State Information Reference Signals (CSI-RSs) multiplexed on different subbands, selecting, with the UE, a predetermined subband of the different subbands based on reception quality of the multiple CSI-RSs, and transmitting, form the UE to the BS, information indicating the predetermined subband. The method further includes transmitting, from the BS to the UE, a CSI-RS multiplexed on the predetermined subband and transmitting, from the UE to the BS, CSI feedback based on the CSI-RS multiplexed on the predetermined subband.
    Type: Application
    Filed: August 8, 2018
    Publication date: August 13, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Satoshi Nagata
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20200244413
    Abstract: The present invention is designed to enable quick beam recovery. A user terminal according to the present invention has a receiving section that receives a downlink (DL) signal, and a control section that controls a beam that is used to transmit and/or receive the DL signal, and the control section controls transmission of an uplink (UL) signal that requests switching of the beam, based on the received power and/or the received quality of a plurality of mobility measurement signals that are respectively associated with a plurality of beams.
    Type: Application
    Filed: February 2, 2018
    Publication date: July 30, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Kazuaki Takeda, Satoshi Nagata, Chongning Na, Yuichi Kakishima
  • USER TERMINAL AND RADIO COMMUNICATION METHOD
    Publication number: 20200229014
    Abstract: A user terminal is disclosed including a receiving section that receives configuration information, which indicates allocation of an interference measurement resource in a unit resource; and a control section that controls measurement of a downlink signal based on the configuration information. In other aspects, a radio communication method is also disclosed.
    Type: Application
    Filed: September 18, 2018
    Publication date: July 16, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Satoshi Nagata, Yuichi Kakishima, Chongning Na, Xin Wang
  • REFERENCE SIGNAL TRANSMISSION AND RECEPTION METHOD AND APPARATUS FOR BEAM MANAGEMENT
    Publication number: 20200220678
    Abstract: A reference signal transmission and reception method is presented. The transmission method includes: transmitting a plurality of first reference signals; and transmitting a plurality of groups of second reference signals, where each first reference signal corresponds to one of the plurality of groups of second reference signal, and the group of second reference signals includes a plurality of second reference signals, where a part of reference signals in the group of second reference signals include quasi co-located information, and the quasi co-located information indicates a correlation between resources for the group of second reference signals including the quasi co-located information and resources for the first reference signal corresponding to the group of second reference signals.
    Type: Application
    Filed: August 9, 2018
    Publication date: July 9, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Min LIU, Chongning NA, Xin WANG, Jing WANG, Yuichi KAKISHIMA, Satoshi NAGATA
  • BEAM SELECTION METHOD, BASE STATION, AND USER EQUIPMENT
    Publication number: 20200213993
    Abstract: A beam selection method, a base station, and a user equipment are presented. The beam selection method performed by the base station includes: receiving transmission beam group information on the base station and information on receiving capability of a receiving set of a user equipment corresponding to each transmission beam group fed back by the user equipment, where the information on receiving capability of the receiving set is the number of reception beams that the user equipment can simultaneously form in the receiving set; and selecting transmission beams corresponding to the receiving set and used for transmitting information to the user equipment based at least in part on the transmission beam group information and the information on receiving capability of each receiving set.
    Type: Application
    Filed: August 9, 2018
    Publication date: July 2, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Min LIU, Chongning NA, Xin WANG, Yuichi KAKISHIMA
  • Base station, user equipment, and method of CSI-RS transmission
    Patent number: 10693616
    Abstract: A method of Channel State Information Reference Signal (CSI-RS) transmission from a base station (BS) to a user equipment (UE) includes reserving, with the BS, a CSI-RS resource used for aperiodic CSI-RS transmission in subframes transmitted from the BS, transmitting, from the BS to the UE, reservation information indicating the CSI-RS resource via higher layer signaling, and transmitting, from the BS to the UE, the aperiodic CSI-RS using the CSI-RS resource.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: June 23, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Satoshi Nagata, Chongning Na, Xiaolin Hou, Huiling Jiang
  • BEAM SELECTION METHOD, MOBILE STATION, AND BASE STATION
    Publication number: 20200195333
    Abstract: Embodiments of the present application provide a beam selection method, a mobile station, and a base station. The beam selection method according to the embodiments of the application including: selecting one leading beam from a plurality of beams; selecting one combined beam from the plurality of beams according to the selected leading beam, where the leading beam and the combined beam are both located in one beam group, and beams in the beam group are orthogonal and adjacent to each other; determining a corresponding reference beam according to the beam group, wherein the reference beam is used to indicate a range of the beam group and is different from the leading beam.
    Type: Application
    Filed: January 4, 2018
    Publication date: June 18, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Huiling LI, Chongning NA, Huiling JIANG, Yuichi KAKISHIMA, Satoshi NAGATA
  • HYBRID CHANNEL QUALITY MEASUREMENT METHOD AND USER EQUIPMENT
    Publication number: 20200196174
    Abstract: A hybrid channel quality measurement method is presented. The method includes: performing a first channel measurement according to Channel State Information Reference Signals (CSI-RSs), and transmitting a first channel measurement feedback to a base station according to a first channel measurement result; determining whether to perform a second channel measurement feedback based on Demodulation Reference Signals (DMRSs) after the first channel measurement feedback is performed; and performing a second channel measurement according to the DMRSs when determining to perform the second channel measurement feedback, and transmitting the second channel measurement feedback to the base station according to a second channel measurement result.
    Type: Application
    Filed: May 3, 2018
    Publication date: June 18, 2020
    Applicant: NTT DoCoMo, Inc.
    Inventors: Min LIU, Xin WANG, Chongning NA, Yuichi KAKISHIMA, Satoshi NAGATA
  • METHOD OF PERFORMING BEAM REPORTING AND USER EQUIPMENT
    Publication number: 20200195332
    Abstract: A method of performing beam reporting in a wireless communication system is disclosed including receiving, with a user equipment (UE), multiple Transmission (Tx) beams used for transmission of reference signals (RSs) from a base station (BS), and performing, with the UE, first beam reporting to the BS. The first beam reporting indicates the Tx beams divided into groups based on a first predetermined grouping type. When the receiving simultaneously receives first Tx beams of the multiple Tx beams, the first Tx beams are divided into a same group based on the first predetermined grouping type. When the receiving simultaneously receives first Tx beams of the multiple Tx beams, the first Tx beams are divided into different groups based on the first predetermined grouping type.
    Type: Application
    Filed: April 4, 2018
    Publication date: June 18, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Min Liu, Satoshi Nagata
  • TRANSMISSION AND RECEPTION POINT (TRP) AND METHOD OF CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) TRANSMISSION
    Publication number: 20200169365
    Abstract: A transmission and reception point (TRP) includes a processor that multiplexes multiple Channel State Information-Reference Signals (CSI-RSs) and at least one Cyclic Prefix (CP) within an Orthogonal Frequency-Division Multiplexing (OFDM) symbol. The TRP further includes a transmitter that transmits the multiple CSI-RSs and the at least one CP to a user equipment (UE). The at least one CP has a predetermined length.
    Type: Application
    Filed: May 3, 2018
    Publication date: May 28, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Satoshi Nagata
  • USER EQUIPMENT AND METHOD OF CHANNEL STATE INFORMATION (CSI) ACQUISITION
    Publication number: 20200162134
    Abstract: A user equipment (UE) includes a receiver that receives, from a Transmission and Reception Point (TRP), multiple Demodulation Reference Signals (DMRSs) in adjacent resource blocks (RBs) of which a number is greater than a first predetermined value, a processor that measures Channel State Information (CSI) using the received DMRSs, and a transmitter that performs CSI reporting based on the CSI.
    Type: Application
    Filed: May 4, 2018
    Publication date: May 21, 2020
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Chongning Na, Min Liu, Xin Wang, Satoshi Nagata