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    • 82. 发明申请
    • MU-MIMO TRANSMISSION METHOD IN WIRELESS LAN SYSTEM
    • 无线局域网系统中的MU-MIMO传输方法
    • US20120230443A1
    • 2012-09-13
    • US13509277
    • 2010-11-12
    • Yong Ho SeokBong Hoe KimDae Won Lee
    • Yong Ho SeokBong Hoe KimDae Won Lee
    • H04L27/28
    • H04B7/0452H04B7/0456H04B7/0617H04B7/0632H04B7/0663H04L25/0224H04W84/12
    • A Multi-User-Multiple Input Multiple Output (MU-MIMO) transmission method performed by an AP in a Wireless Local Area Network (WLAN) system is provided. The method includes transmitting an MU-MIMO initiation message to a destination STA which is a target of a MU-MIMO transmission, the MU-MIMO initiation message informing that MU-MIMO transmission will be initiated, receiving a sounding frame transmitted by the destination STA as a response to the MU-MIMO initiation message and performing MU-MIMO transmission on data by beamforming based on channel information obtained from the sounding frame. The sounding frame includes precoded and virtualized channel information Hvirtual between the AP and the STA. A dimension of the Hvirtual is lower than a dimension of channel information H between the AP and the STA.
    • 提供了一种由无线局域网(WLAN)系统中的AP执行的多用户多输入多输出(MU-MIMO)传输方法。 该方法包括向作为MU-MIMO传输的目标的目的地STA发送MU-MIMO发起消息,通知MU-MIMO传输将被发起的MU-MIMO发起消息,接收目的STA发送的探测帧 作为对MU-MIMO发起消息的响应,并且基于从发现帧获得的信道信息,通过波束成形对数据执行MU-MIMO传输。 探测帧包括在AP和STA之间的虚拟的预编码和虚拟化信道信息。 Hvirtual的维度低于AP和STA之间的信道信息H的维度。
    • 83. 发明申请
    • METHOD FOR CHANNEL SOUNDING IN WIRELESS LOCAL AREA NETWORK AND APPARATUS FOR THE SAME
    • 无线本地区网络中的信道声音方法及其设备
    • US20120140753A1
    • 2012-06-07
    • US13307774
    • 2011-11-30
    • Dae Won LEEIll Soo SohnYong Ho Seok
    • Dae Won LEEIll Soo SohnYong Ho Seok
    • H04W92/00
    • H04L5/0053H04B7/0452H04B7/0636H04L1/1812H04L5/0023H04W16/28H04W84/12
    • A channel sounding method in a wireless local area network (WLAN) system is provided. The method, performed by a transmitter, includes transmitting a null data packet announcement (NDPA) frame to a receiver to initiate a channel sounding procedure; transmitting a null data packet (NDP) to the receiver and receiving a feedback frame. The feedback frame includes a plurality of segment frames and a channel feedback report. The channel feedback report is split into a plurality of feedback segments. Each of the plurality of feedback segments is respectively included in each of the plurality of segment frames. The each of the plurality of segment frames includes a first-segment subfield indicating whether the each of the plurality of feedback segment included is a first segment and a remaining-segment subfield indicating the number of remaining feedback segments.
    • 提供了一种无线局域网(WLAN)系统中的信道探测方法。 由发射机执行的方法包括向接收机发送空数据分组公告(NDPA)帧以发起信道探测过程; 向接收机发送空数据分组(NDP)并接收反馈帧。 反馈帧包括多个分段帧和信道反馈报告。 信道反馈报告被分成多个反馈段。 多个反馈段中的每一个分别包括在多个段帧中的每一个中。 多个段帧中的每一个包括指示所包括的多个反馈段中的每一个是否为第一段的第一段子字段和指示剩余反馈段的数目的剩余段子字段。
    • 84. 发明申请
    • METHOD AND APPARATUS OF TRANSMITTING A SPATIAL STREAM FOR MU - MIMO IN A WIRELESS LOCAL AREA NETWORK SYSTEM
    • 在无线局域网系统中传输MU-MIMO的空间流的方法和装置
    • US20110188598A1
    • 2011-08-04
    • US13016900
    • 2011-01-28
    • Dae Won LEEYong Ho Seok
    • Dae Won LEEYong Ho Seok
    • H04L27/00H04B7/02H04L1/02
    • H04W4/08H04B7/0452H04W72/042H04W72/046H04W72/1278H04W84/12
    • A method of transmitting a spatial stream for multi user (MU)-multiple input multiple output (MIMO) in a wireless local area network system, performed by a transmitter is provided. the method includes transmitting, to a receiver, a management frame including group information to assign or change a position of a plurality of spatial streams corresponding to each of a plurality of groups, and transmitting, to the receiver, a frame including at least one spatial stream, wherein the group information includes a plurality of group indicators and a plurality of spatial stream (SS) indicators, each of the plurality of group indicators indicating whether or not the receiver is a member of each of the plurality of groups, each of the plurality of SS indicators indicating a position of the plurality of spatial streams corresponding to each of the plurality of groups.
    • 提供了一种在无线局域网系统中由发射机发送用于多用户(MU)多输入多输出(MIMO)的空间流的方法。 该方法包括向接收机发送包括组信息的管理帧以分配或改变与多个组中的每个组相对应的多个空间流的位置,以及向接收机发送包括至少一个空间 流,其中所述组信息包括多个组指示符和多个空间流(SS)指示符,所述多个组指示符中的每一个指示所述接收者是否是所述多个组中的每一个的成员, 多个SS指示符指示与多个组中的每个组对应的多个空间流的位置。