Method and apparatus for downlink transmission based on MIMO precoding in wireless communication system employing distributed antenna systems
    3.
    发明授权
    Method and apparatus for downlink transmission based on MIMO precoding in wireless communication system employing distributed antenna systems 有权
    基于采用分布式天线系统的无线通信系统中基于MIMO预编码的下行链路传输的方法和装置

    公开(公告)号:US08724607B2

    公开(公告)日:2014-05-13

    申请号:US13371935

    申请日:2012-02-13

    IPC分类号: H04B7/216

    摘要: A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.

    摘要翻译: 提供了一种利用基于分布式天线系统(DAS)的多输入多输出(MIMO)预编码的传输方法和装置。 传输方法包括从均匀放置在服务区域中的多个分布式天线端口(DAP)中确定用于具有多个接收天线的用户设备(UE)的有源天线端口; 向所述UE分配多输入多输出(MIMO)模式,并向所述UE通知所述MIMO模式分配; 基于从UE接收的MIMO模式的反馈信息,确定信号预编码矢量; 并使用信号预编码矢量对信号进行预编码,并通过有源天线端口发送预编码信号。

    Method and apparatus for transmitting CSI-RS and data using partial muting of CSI-RS
    5.
    发明授权
    Method and apparatus for transmitting CSI-RS and data using partial muting of CSI-RS 有权
    使用CSI-RS的部分静音发送CSI-RS和数据的方法和装置

    公开(公告)号:US08665972B2

    公开(公告)日:2014-03-04

    申请号:US13156685

    申请日:2011-06-09

    IPC分类号: H04K1/10

    摘要: A method and apparatus for transmitting Channel State Information Reference Symbol (CSI-RS) and data with partial muting of the CSI-RS are proposed. The method includes determining a CSI-RS pattern to be used among CSI-RS pattern candidates, determining a muting pattern for muting some resource elements constituting CSI-RS pattern candidates except for the determined CSI-RS pattern, mapping data symbols and CSI-RS to resource elements in a resource grid with rate patching in consideration of the CSI-RS pattern and muting pattern, and transmitting the data symbols and CSI-RS to a terminal.

    摘要翻译: 提出了一种用于发送信道状态信息参考符号(CSI-RS)的方法和装置以及具有CSI-RS的部分静噪的数据。 该方法包括确定在CSI-RS模式候选中要使用的CSI-RS模式,确定用于使构成除了确定的CSI-RS模式之外的CSI-RS模式候选的一些资源元素静噪的静噪模式,映射数据符号和CSI-RS 考虑到CSI-RS模式和静噪模式,利用速率修补的资源网格中的资源元素,并将数据符号和CSI-RS发送到终端。

    Apparatus and method for sending and receiving channel state information in communication system

    公开(公告)号:US09628218B2

    公开(公告)日:2017-04-18

    申请号:US13582201

    申请日:2011-03-25

    IPC分类号: H04B7/04 H04L1/00

    CPC分类号: H04L1/0026 H04L1/0029

    摘要: The present invention relates to a channel status information transmission/reception method and apparatus in a wireless communication system in which the transmission apparatus generates channel status informations for at least two transmission schemes by combining rank informations corresponding to the transmission schemes into combined rank information through analyzing an uplink channel, and transmits the channel status informations for the respective transmission schemes on uplink channel, the channel status information for one of the transmission schemes containing the combined rank information; the reception apparatus receives the channel status informations corresponding to at least two transmission schemes, the channel status information for one of the transmission schemes including combined rank information for the transmission schemes, schedules downlink channel according to the channel status information, and transmits signals on the downlink channel. According to the present invention, the transmission apparatus combines rank informations of a plurality of transmission schemes and feeds back the combined rank information so as to reduce overhead at a reception apparatus.

    Method and apparatus for transmitting and receiving reference signal in wireless communication system
    7.
    发明授权
    Method and apparatus for transmitting and receiving reference signal in wireless communication system 有权
    用于在无线通信系统中发送和接收参考信号的方法和装置

    公开(公告)号:US08948076B2

    公开(公告)日:2015-02-03

    申请号:US13210078

    申请日:2011-08-15

    IPC分类号: H04B7/14 H04W48/12 H04W28/00

    摘要: Methods and apparatus are provided for transmitting processing reference signals in a mobile communication system. A base station determines a reference signal pattern comprising at least one resource element, generates a bitmap indicator indicating whether zero transmission power is assigned to the at least one resource element of the reference signal pattern, and transmits the reference signal pattern and the bitmap indicator to a terminal. The terminal receives the reference signal pattern and the bitmap indicator, and processes a reference signal extracted according to the reference signal pattern and the bitmap indicator.

    摘要翻译: 提供了用于在移动通信系统中发送处理参考信号的方法和装置。 基站确定包括至少一个资源元素的参考信号模式,生成指示零发送功率是否被分配给参考信号模式的至少一个资源元素的位图指示符,并将参考信号模式和位图指示符发送到 一个终端。 终端接收参考信号模式和位图指示符,并处理根据参考信号模式和位图指示符提取的参考信号。

    Method and apparatus for transmitting/receiving a reference signal in a wireless communication system
    9.
    发明授权
    Method and apparatus for transmitting/receiving a reference signal in a wireless communication system 有权
    用于在无线通信系统中发送/接收参考信号的方法和装置

    公开(公告)号:US08355367B2

    公开(公告)日:2013-01-15

    申请号:US12862389

    申请日:2010-08-24

    IPC分类号: H04Q7/00 H04Q7/24

    摘要: A method and apparatus for transmitting/receiving reference signals in Long Term Evolution (LTE) and LTE-Advanced (LTE-A) systems includes determining whether a dedicated reference signal is detected in a current subframe; estimating, if a dedicated reference signal is detected in the current subframe, a data channel using the dedicated reference signal to receive data; and estimating, if no dedicated reference signal is detected in the current subframe, a data channel using a common reference signal detected in the current subframe to receive data. The transmission scheme uses a DeModulation Reference Signal (DM-RS) for channel response estimation. To secure backward compatibility of the LTE-A system, a Common Reference Signal is transmitted in normal subframes.

    摘要翻译: 一种用于在长期演进(LTE)和LTE高级(LTE-A)系统中发送/接收参考信号的方法和装置,包括确定在当前子帧中是否检测到专用参考信号; 如果在当前子帧中检测到专用参考信号,则估计使用专用参考信号接收数据的数据信道; 以及如果在当前子帧中没有检测到专用参考信号,则估计使用当前子帧中检测到的公共参考信号的数据信道来接收数据。 传输方案使用解调参考信号(DM-RS)进行信道响应估计。 为了确保LTE-A系统的向后兼容性,在普通子帧中传送公共参考信号。