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    Grant-free transmission method, user equipment and base station
    1.
    发明授权
    Grant-free transmission method, user equipment and base station 有权

    公开(公告)号：US11310839B2

    公开(公告)日：2022-04-19

    申请号：US16495661

    申请日：2018-02-28

    Applicant: NTT DOCOMO, INC.

    Inventor： Neng Ye ,  Xiangming Li ,  Xiaohang Chen ,  Xiaolin Hou ,  Qun Zhao ,  Huiling Jiang

    IPC: H04W74/08 ,  H04W72/04 ,  H04W72/08 ,  H04W74/00

    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.

    User equipment and base station, and method executed by user equipment and base station
    2.
    发明授权
    User equipment and base station, and method executed by user equipment and base station 有权

    公开(公告)号：US12200785B2

    公开(公告)日：2025-01-14

    申请号：US17423792

    申请日：2019-01-18

    Applicant: NTT DOCOMO, INC.

    Inventor： Neng Ye ,  Xiangming Li ,  Wenjia Liu ,  Xiaolin Hou

    IPC: H04W76/11

    Abstract: Embodiments of the present disclosure provide a user equipment and a base station that can be used in a wireless communication system, or a method executed by a user equipment and a base station. The user equipment in the embodiments of the present invention includes: a control unit, configured to acquire a multiple access signature, wherein the multiple access signature is determined, from a multiple access signature pool, according to activation information of the user equipment, and the activation information of the user equipment is related to the activation of the user equipment; and a sending unit, configured to use the multiple access signature to send data.

    Data transmission method, apparatus and storage medium
    3.
    发明授权
    Data transmission method, apparatus and storage medium 有权

    公开(公告)号：US11012101B2

    公开(公告)日：2021-05-18

    申请号：US16627066

    申请日：2018-04-04

    Applicant: NTT DoCoMo, Inc.

    Inventor： Neng Ye ,  Xiangming Li ,  Xiaohang Chen ,  Xiaolin Hou

    IPC: H03M13/00 ,  H03M13/35 ,  G06N20/00 ,  H03M13/37 ,  H03M13/39

    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.

    Uplink data transmission method and apparatus
    4.
    发明授权
    Uplink data transmission method and apparatus 有权

    公开(公告)号：US10764856B2

    公开(公告)日：2020-09-01

    申请号：US16323207

    申请日：2017-07-07

    Applicant: NTT DOCOMO, INC.

    Inventor： Neng Ye ,  Xiangming Li ,  Anxin Li ,  Xiaohang Chen ,  Qun Zhao ,  Huiling Jiang

    IPC: H04W74/08 ,  H04W56/00 ,  H04W76/11 ,  H04L12/733 ,  H04W24/08 ,  H04W52/02

    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. By means of the method in the present application, the time delay and the power consumption can be reduced.

    Method for transmitting signals and corresponding terminals, and base stations
    6.
    发明授权
    Method for transmitting signals and corresponding terminals, and base stations 有权

    公开(公告)号：US11469926B2

    公开(公告)日：2022-10-11

    申请号：US16981842

    申请日：2018-05-11

    Applicant: NTT DOCOMO, INC.

    Inventor： Dongbo Feng ,  Xiangming Li ,  Neng Ye ,  Wenjia Liu ,  Xiaolin Hou ,  Runxin Wang ,  Liu Liu

    IPC: H04L25/02 ,  H04L5/00 ,  H04W24/10

    Abstract: Provided are a method for transmitting signals and corresponding terminals, and base stations, where the method for transmitting signals is performed by a terminal in a communication system. The method includes determining, whether to transmit an additional reference signal to a base station in the communication system according to information on channel conditions of the terminal; transmitting a main reference signal to the base station, where the main reference signal is used for channel estimation between the terminal and the base station; and when determining to transmit an additional reference signal to the base station, transmitting an additional reference signal to the base station according to configuration information of the additional reference signal.

    Constellation rotation method and base station
    8.
    发明授权
    Constellation rotation method and base station 有权

    公开(公告)号：US11362879B2

    公开(公告)日：2022-06-14

    申请号：US16608728

    申请日：2018-03-20

    Applicant: NTT DoCoMo, Inc.

    Inventor： Neng Ye ,  Xiangming Li ,  Xiaohang Chen ,  Xiaolin Hou ,  Qun Zhao ,  Huiling Jiang

    IPC: H04L27/34 ,  H04W24/08

    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.

    TRANSMITTING DEVICE, RECEIVING DEVICE, AND MODULATION METHOD
    10.
    发明申请
    TRANSMITTING DEVICE, RECEIVING DEVICE, AND MODULATION METHOD 有权

    公开(公告)号：US20250047547A1

    公开(公告)日：2025-02-06

    申请号：US18719660

    申请日：2022-01-07

    Applicant: NTT DOCOMO, INC.

    Inventor： Xiaorui Yan ,  Neng Ye ,  Xiangming Li ,  Wenjia Liu ,  Xiaolin Hou ,  Lan Chen ,  Yoshihisa Kishiyama ,  Takahiro Asai

    IPC: H04L27/36

    Abstract: The present disclosure provides a transmitting device, a receiving device and a modulation method. The transmitting device includes: a receiving unit configured to obtain a bit sequence to be transmitted; a control unit configured to perform pseudo-N-order first type of modulation on the bit sequence to be transmitted, according to information about phase noise, wherein 2{circumflex over ( )}N first symbols of the pseudo-N-order first type of modulation correspond to a part of 2{circumflex over ( )}M second symbols of M-order second type of modulation, where M and N are positive integers.

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