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    COMMUNICATION METHOD AND APPARATUS USING CODEBOOK IN MIMO SYSTEM
    62.
    发明申请
    COMMUNICATION METHOD AND APPARATUS USING CODEBOOK IN MIMO SYSTEM 有权
    在MIMO系统中使用CODEBOOK的通信方法和设备

    公开(公告)号：US20130142277A1

    公开(公告)日：2013-06-06

    申请号：US13738434

    申请日：2013-01-10

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Myung Hoon Yeon ,  Joon Young Cho ,  Ju Ho Lee

    IPC: H04B7/04

    CPC classification number: H04B7/0465 ,  H04B7/0447 ,  H04B7/0617 ,  H04B7/0619 ,  H04L5/0023 ,  H04L27/2614

    Abstract: A method and apparatus for transmitting and receiving signals using a codebook which maps each codeword to at least two different antennas is provided for a MIMO system. A transmission method includes mapping multiple codewords to multiple layers; mapping the multiple layers to multiple antennas using a precoding matrix selected from a rank-3 codebook which is designed to map the codewords to different antennas; and transmitting the codewords through paths formed by mapping the layers and the antennas. The precoding matrix of the rank-3 codebook is designed to equalize transmit power ratios between the antennas. The communication method and apparatus is advantageous to solve the problem of transmit power imbalance among the layers and the problem of performance degradation at the high SNR region in the conventional system using the rank-3 precoding matrices.

    Abstract translation: 为MIMO系统提供使用将每个码字映射到至少两个不同天线的码本发送和接收信号的方法和装置。 传输方法包括将多个码字映射到多个层; 使用从被设计为将码字映射到不同天线的等级3码本中选择的预编码矩阵将多层映射到多个天线; 以及通过映射层和天线形成的路径来发送码字。 第3级码本的预编码矩阵被设计为使天线之间的发射功率比相等。 该通信方法和装置有利于解决传统系统中使用秩3预编码矩阵的层间发射功率不平衡问题和高SNR区域性能退化问题。

    Method and device for monitoring frequency domain-based wireless link in wireless communication system
    65.
    发明授权
    Method and device for monitoring frequency domain-based wireless link in wireless communication system 有权

    公开(公告)号：US10448400B2

    公开(公告)日：2019-10-15

    申请号：US15619952

    申请日：2017-06-12

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Sang Min Ro ,  Young Bum Kim ,  Joon Young Cho ,  Hyoung Ju Ji ,  Seung Hoon Choi

    IPC: H04J1/16 ,  H04W72/04 ,  H04W24/08 ,  H04L5/00 ,  H04L1/16 ,  H04L1/00

    Abstract: The present disclosure relates to a technique for radio link monitoring in a wireless communication system, and to operation procedures of the base station and user equipment and a method for radio link quality evaluation on the basis of the technique. In the method, the user equipment divides the downlink channel bandwidth into multiple frequency ranges, measures channel states for each frequency range, and evaluates the radio link quality based on channel state measurement results. Thereafter, the user equipment sends frequency range quality information to the base station, which may then utilize the same for downlink resource allocation. Hence, it is possible to solve the problem of the existing scheme wherein the user equipment enters the physical layer problem detection state or the radio link failure state although a frequency range usable for service provisioning is present within the downlink channel bandwidth.

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