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    • 5. 发明申请
    • Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless communications
    • 多用户空数据分组(MU-NDP)在多用户,多路访问和/或MIMO无线通信中发声
    • US20150326409A1
    • 2015-11-12
    • US14722957
    • 2015-05-27
    • BROADCOM CORPORATION
    • Joonsuk KimMatthew James FischerPeiman AminiVinko Erceg
    • H04L25/02H04L5/00H04B7/06H04L1/06H04B7/04H04L27/26
    • H04B7/0452H04B7/0417H04B7/0643H04L1/0065H04L1/0068H04L1/0631H04L5/0023H04L25/0204H04L25/0226
    • Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless communications. Within communication systems including multiple wireless communication devices (e.g., one or more APs, STAs, etc.), channel sounding of the selected communication links between the various wireless communication devices is performed. A MU-NDP announcement frame is transmitted to and received by various wireless communication devices indicating which of those wireless communication devices (e.g., one, some, or all) are being sounded. Then, respective NDP sounding frames are transmitted via the communication links corresponding to those wireless communication devices (e.g., one, some, or all) are being sounded, and sounding feedback signals are subsequently sent back to the original transmitting wireless communication device. In some instances, after transmission of the MU-NDP announcement frame, a clear to send (CTS) is sent from at least one of the wireless communication devices thereby precipitating the transmission of the NDP sounding frames.
    • 多用户空数据分组(MU-NDP)在多用户,多路访问和/或MIMO无线通信中发声。 在包括多个无线通信设备(例如,一个或多个AP,STA等)的通信系统中,执行各种无线通信设备之间所选择的通信链路的信道探测。 MU-NDP通知帧被发送到各种无线通信设备并由各种无线通信设备接收,指示哪些无线通信设备(例如,一个,一个或全部)正在发声。 然后,通过与正在发声的那些无线通信设备(例如,一个或全部)相对应的通信链路发送各个NDP探测帧,随后将发声反馈信号发送回原始的发送无线通信设备。 在一些情况下,在发送MU-NDP通知帧之后,从无线通信设备中的至少一个发送清除发送(CTS),从而使得NDP探测帧的发送成为可能。
    • 9. 发明申请
    • Beamforming feedback frame formats within multiple user, multiple access, and/or MIMO wireless communications
    • 在多用户,多路访问和/或MIMO无线通信范围内成像反馈帧格式
    • US20140050211A1
    • 2014-02-20
    • US14067009
    • 2013-10-30
    • BROADCOM CORPORATION
    • Joonsuk KimJoseph Paul LauerVinko ErcegPeiman AminiMatthew James Fischer
    • H04B7/06
    • H04B7/063H04B7/0456H04B7/0617H04B7/0619H04B7/0626H04B7/0634H04B7/0645H04B7/0669H04L1/0687H04W4/00
    • Beamforming feedback frame formats within multiple user, multiple access, and/or MIMO wireless communications. A transmitting wireless communication device (TX) transmits a sounding frame to one or more receiving wireless communication devices (RXs) using one or more antennae and one or more clusters. Any antenna/cluster combination may be employed in communications between TXs and RXs. The one or more RXs receive/process the sounding frame to determine a type of beamforming feedback frame to be provided to the TX. Any one of a variety of beamforming feedback frame types and a types of information may be contained within a respective beamforming feedback frame including various characteristics of the respective communication channel between the TX and each of the various RXs. A common beamforming feedback frame format may be supported and employed by all such wireless communication devices (e.g., TX and RXs) when performing MU-MIMO operation such as in accordance with IEEE 802.11ac/VHT.
    • 在多用户,多路访问和/或MIMO无线通信范围内成像反馈帧格式。 发射无线通信设备(TX)使用一个或多个天线和一个或多个簇向一个或多个接收无线通信设备(RX)发送探测帧。 在TX和RX之间的通信中可以采用任何天线/群集组合。 一个或多个RX接收/处理探测帧以确定要提供给TX的波束形成反馈帧的类型。 各种波束形成反馈帧类型和信息类型中的任何一种可以包含在相应的波束形成反馈帧内,包括TX与各个RX之间的各个通信信道的各种特性。 当执行诸如根据IEEE 802.11ac / VHT的MU-MIMO操作时,所有这样的无线通信设备(例如,TX和RX)可以支持和采用公共波束形成反馈帧格式。
    • 10. 发明申请
    • SCHEDULED CLEAR TO SEND (CTS) FOR MULTIPLE USER, MULTIPLE ACCESS, AND/OR MIMO WIRELESS COMMUNICATIONS
    • 针对多用户,多路访问和/或MIMO无线通信的时间表清除(CTS)
    • US20140029543A1
    • 2014-01-30
    • US14039712
    • 2013-09-27
    • BROADCOM CORPORATION
    • Matthew James FischerPeiman AminiVinko ErcegJoseph Paul LauerJoonsuk Kim
    • H04L5/00
    • H04L5/0058H04L5/0023H04L5/0037H04L5/006H04L5/0064H04L25/0224H04L25/03343H04L2025/03802H04W74/04
    • Scheduled clear to send (CTS) for multiple user, multiple access, and/or MIMO wireless communications. Before sending transmissions, a request to send (RTS)/clear to send (CTS) exchange takes place between a transmitting wireless communication device and multiple receiving wireless communication devices may take place therein. The transmitting wireless communication device (e.g., an AP) may generate and transmit a multi-user request to send (mRTS) frame to a number of receiving wireless communication devices (e.g., STAs). The mRTS frame can include information and instructions therein to direct the manner by which all or a subset of the receiving wireless communication devices are to provide CTS responses back to the transmitting wireless communication device. The mRTS frame may be an OFDMA frame, a MU-MIMO frame, or a combination thereof. The CTS responses may be received in accordance with any one or combination of OFDM signaling, OFDMA signaling, and MU-MIMO signaling.
    • 为多个用户,多路访问和/或MIMO无线通信计划明确发送(CTS)。 在发送传输之前,可以在发送无线通信设备和多个接收无线通信设备之间进行发送(RTS)/清除发送(CTS)交换的请求。 发射无线通信设备(例如,AP)可以生成并向多个接收无线通信设备(例如,STA)发送(mRTS)帧的多用户请求。 mRTS帧可以包括其中的信息和指令,以指导接收无线通信设备的全部或一部分子集将CTS响应提供给发送无线通信设备的方式。 mRTS帧可以是OFDMA帧,MU-MIMO帧或其组合。 可以根据OFDM信令,OFDMA信令和MU-MIMO信令的任何一个或组合来接收CTS响应。