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    METHODS AND APPARATUSES FOR TRANSMITTING CODING INDICATION INFORMATION AND DETERMINING PRECODING MATRIX
    31.
    发明申请
    METHODS AND APPARATUSES FOR TRANSMITTING CODING INDICATION INFORMATION AND DETERMINING PRECODING MATRIX 审中-公开

    公开(公告)号：US20180241445A1

    公开(公告)日：2018-08-23

    申请号：US15755090

    申请日：2016-07-19

    Applicant: China Academy of Telecommunications Technology

    Inventor： Hui LI ,  Shanzhi CHEN ,  Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Tamrakar RAKESH

    IPC: H04B7/0456 ,  H04B7/06

    Abstract: Methods and apparatuses for transmitting coding indication information and determining a precoding matrix, for use in resolving the problem that the resolution of code words in a codebook generated by using a combination of a beam vector subgroup and column selection cannot be flexibly adjusted. The method comprises: determining first precoding indication information and second precoding indication information, the first precoding indication information corresponding to a first-stage precoding matrix, the second precoding indication information corresponding to a direction weighting vector and a phase adjustment factor, the direction weighting vector being used for performing interpolation processing on parts representing angles corresponding to beam vectors in the all beam vectors in each polarization direction in the first-stage precoding matrix, the phase adjusting factor being used for performing phase adjustment on different polarization directions of the first-stage precoding matrix, and the first-stage precoding matrix, the direction weighting vector, and the phase adjustment factor being used for generating a precoding matrix. The resolution of a precoding matrix is flexibly adjusted by using a direction weighting vector.

    CHANNEL STATE INFORMATION FEEDBACK AND CONTROL METHOD AND DEVICE THEREFOR
    32.
    发明申请
    CHANNEL STATE INFORMATION FEEDBACK AND CONTROL METHOD AND DEVICE THEREFOR 审中-公开

    公开(公告)号：US20180167124A1

    公开(公告)日：2018-06-14

    申请号：US15579122

    申请日：2016-05-23

    Applicant: China Academy of Telecommunications Technology

    Inventor： Runhua CHEN ,  Qiubin GAO ,  Tamrakar RAKESH

    IPC: H04B7/06

    CPC classification number: H04B7/0626 ,  H04B7/0632 ,  H04B7/0639 ,  H04W24/10 ,  H04W72/0413 ,  H04W88/02

    Abstract: Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale CSI feedback under an antenna system, wherein a UE may only need to feedback some pieces of PMI information, so that the complexity of the UE feeding back CSI is reduced, and the flexibility for a network side to control the UE to feed back the CSI is better. The channel state information (CSI) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (UE) to feed back CSI, the CSI at least comprising a first precoding matrix indicator (PMI) and a second PMI, the first PMI and the second PMI corresponding to the same precoding matrix; and the base station sending trigger signaling of CSI feedback to the UE, wherein indication information used for instructing whether the UE feeds back the first PMI and/or the second PMI is comprised.

    CELL MEASUREMENT METHOD AND TERMINAL
    33.
    发明申请
    CELL MEASUREMENT METHOD AND TERMINAL 审中-公开

    公开(公告)号：US20170373772A1

    公开(公告)日：2017-12-28

    申请号：US15539981

    申请日：2015-12-09

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Hui LI ,  Rakesh TAMRAKAR

    IPC: H04B17/318 ,  H04L25/02 ,  H04B7/0452

    Abstract: The present disclosure provides a cell measurement method and a terminal. The cell measurement method includes steps of: measuring a pilot signal from a to-be-measured cell, so as to acquire an channel estimation of N pilot signal transmission ports of the to-be-measured cell, N≧1; determining an equivalent received power corresponding to each precoding matrix in accordance with each precoding matrix in a set of precoding matrices and the channel estimation of the N pilot signal transmission ports of the to-be-measured cell; and determining an equivalent received power of the to-be-measured cell in accordance with the equivalent received power corresponding to each precoding matrix.

    D2D COMMUNICATION METHOD AND DEVICE
    35.
    发明申请
    D2D COMMUNICATION METHOD AND DEVICE 审中-公开

    公开(公告)号：US20170223729A1

    公开(公告)日：2017-08-03

    申请号：US15309646

    申请日：2015-05-07

    Applicant: China Academy of Telecommunications Technology

    Inventor： Rui ZHAO ,  Qiubin GAO ,  Wenhong CHEN ,  Ying PENG

    IPC: H04W74/00 ,  H04W76/02 ,  H04W74/08

    CPC classification number: H04W74/002 ,  H04W74/0816 ,  H04W76/14 ,  H04W84/042

    Abstract: Disclosed are a D2D communication method and device. The method comprises: sending a. preamble on a sub-channel set of a competition region, and monitoring the preamble on the sub-channel set of the competition region; and if the preamble is not monitored on the sub-channel set of the competition region, sending data on a sub-channel set of a data region corresponding to the sub-channel set of the competition region, different sub-channel sets of the competition region corresponding to different sub-channel sets of the data region. The technical solution provided in the embodiments of the present invention can effectively avoid the resource conflict of a D2D UE. In addition, since a preamble occupies fewer resources, competing for sub-channel resources of a data region by sending a preamble could effectively reduce the overhead of resource competition.

    METHOD AND DEVICE FOR TRANSMITTING PILOT SIGNAL
    37.
    发明申请
    METHOD AND DEVICE FOR TRANSMITTING PILOT SIGNAL 有权
    用于发射导频信号的方法和装置

    公开(公告)号：US20160072712A1

    公开(公告)日：2016-03-10

    申请号：US14786440

    申请日：2014-04-22

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Qiubin GAO ,  Wenhong CHEN ,  Rui ZHAO ,  Ying PENG

    IPC: H04L12/801 ,  H04L5/00 ,  H04L5/14

    CPC classification number: H04L47/12 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0062 ,  H04L5/0089 ,  H04L5/14 ,  H04L25/0226 ,  H04L27/2613

    Abstract: Disclosed are a method and device for transmitting a pilot signal. The method therefor comprises: conducting OFDM modulation on a pilot signal; and sending the modulated pilot signal on the first and/or the last OFDM symbol of a subframe which transmits the pilot signal. In the technical solution provided in the embodiments of the present application, the pilot signal is transmitted on the first and/or the last OFDM symbol of the subframe, thereby not occupying an OFDM symbol for transmitting a data signal, so as to reduce the resource overhead of the pilot signal.

    Abstract translation: 公开了一种用于发送导频信号的方法和装置。 其方法包括：对导频信号进行OFDM调制; 以及在发送导频信号的子帧的第一和/或最后的OFDM符号上发送调制的导频信号。 在本申请的实施例提供的技术方案中，在子帧的第一和/或最后的OFDM符号上发送导频信号，从而不占用用于发送数据信号的OFDM符号，以便减少资源 导频信号的开销。

    D2D SWITCHOVER METHOD, SYSTEM, AND DEVICE
    38.
    发明申请
    D2D SWITCHOVER METHOD, SYSTEM, AND DEVICE 有权
    D2D开关方法，系统和装置

    公开(公告)号：US20160029429A1

    公开(公告)日：2016-01-28

    申请号：US14773383

    申请日：2014-03-17

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Ying PENG ,  Qiubin GAO ,  Wenhong CHEN ,  Rui ZHAO

    IPC: H04W76/04 ,  H04W36/26 ,  H04W24/10 ,  H04W24/02

    CPC classification number: H04W76/043 ,  H04W24/02 ,  H04W24/10 ,  H04W36/00 ,  H04W36/26 ,  H04W76/23 ,  H04W84/12 ,  H04W88/06

    Abstract: Embodiments of the present application relate to the technical field of wireless communication, in particular a D2D switchover method, system, and device, for solving the problem in prior art of the lack of mechanism for D2D switchover for D2D user devices under appropriate conditions so as to ensure the short-distance transmission quality in the situation where an LTE system has too high a load and interference is too strong. Embodiments of the present invention comprise: a network device determines, according to resource management information and/or channel status information whether a D2D user device needs to perform a D2D switchover; when the D2D user device is determined to need to perform a D2D switchover, the D2D user device is triggered to switch to a heterogeneous system and conduct end-to-end communication, or to conduct end-to-end communication via the network device, or to conduct in the current system end-to-end communication not controlled by the network device. The method in the embodiments of the present invention ensures that D2D devices can perform D2D switchover under appropriate conditions even when an LED system has too high a load and interference is too strong, thereby enhancing the end-to-end communication performance.

    Abstract translation: 本申请的实施例涉及无线通信的技术领域，特别是D2D切换方法，系统和设备，用于解决现有技术中在适当条件下D2D用户设备缺乏D2D切换机制的问题，以便 在LTE系统负载过大，干扰过强的情况下，确保短距离传输质量。 本发明的实施例包括：网络设备根据资源管理信息和/或信道状态信息确定D2D用户设备是否需要执行D2D切换; 当D2D用户设备确定需要进行D2D切换时，D2D用户设备被触发切换到异构系统并进行端到端通信，或通过网络设备进行端到端通信， 或者在当前系统中进行端到端通信，而不是由网络设备控制的。 本发明实施例中的方法，即使在LED系统的负载过高，干扰过强的情况下，D2D设备也可以在适当的条件下进行D2D切换，从而提高端对端的通信性能。

    BEAM TRAINING METHOD AND DEVICE
    40.
    发明申请
    BEAM TRAINING METHOD AND DEVICE 有权

    公开(公告)号：US20210083754A1

    公开(公告)日：2021-03-18

    申请号：US16324902

    申请日：2017-06-07

    Applicant: China Academy of Telecommunications Technology

    Inventor： Yang SONG ,  Qiubin GAO ,  Runhua CHEN ,  Tamrakar RAKESH ,  Xin SU ,  Chuanjun LI ,  Mengjun WANG ,  Yu YANG ,  Hui LI ,  Qiuping HUANG

    IPC: H04B7/08 ,  H04B7/0417 ,  H04B7/06

    Abstract: The present invention relates to the technical field of wireless communications, and in particular, to a beam training method and device, for use in resolving the problems in the prior art of excessive time-consuming of a beam training process, large overhead of training signals, and relatively low efficiency. According to embodiments of the present invention, a transmit device sends beam training signals in two times. The first sending of a transmit beam training signal is for a receive device to select a transmit beam using a selected receive beam and report the transmit beam. The second sending is that the transmit device sends a receive beam training signal according to the transmit beam information report of the receive device, so as to train the received beam of the receive device. According to the embodiments of the present invention, an interactive beam training method is used to gradually search for the best transmit beam and receive beam, thereby avoiding completing beam training all at once, reducing beam training time and overhead, and improving efficiency.

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