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    • 3. 发明授权
    • Carrier sense multiple access (CSMA) for multiple user, multiple access, and/or MIMO wireless communications
    • 用于多用户,多址和/或MIMO无线通信的载波侦听多路访问(CSMA)
    • US08804495B2
    • 2014-08-12
    • US12816352
    • 2010-06-15
    • Peiman AminiMatthew James FischerVinko ErcegJoonsuk KimJoseph Paul Lauer
    • Peiman AminiMatthew James FischerVinko ErcegJoonsuk KimJoseph Paul Lauer
    • H04H20/71H04L12/26
    • H04L41/0893H04H20/61H04H20/72H04H40/27H04L43/024
    • Carrier sense multiple access (CSMA) for multiple user, multiple access, and/or MIMO wireless communications. In wireless communication systems that operate in supporting communications via one or more clusters, appropriate determination of when to begin making such transmissions on one or more clusters is made in accordance with intelligent carrier sense multiple access (CSMA) that may be performed in a number of different ways. In accordance with this, a cluster may be any combination composed of one or more channels among one or more bands. In supporting multi-cluster access, CSMA may be performed in selecting a primary cluster and performing backoff (e.g., countdown) thereon. After backoff is finished for the primary cluster, and the availability of one or more others clusters is checked, transmissions may be made using the available clusters. Alternatively, backoff may be made for each or multiple (a subset of) clusters or even individually for each respective cluster.
    • 用于多用户,多址和/或MIMO无线通信的载波侦听多路访问(CSMA)。 在经由一个或多个集群支持通信的操作的无线通信系统中,根据可以在多个集群中执行的智能载波侦听多路访问(CSMA)来适当地确定何时开始在一个或多个集群上进行这样的传输。 不同的方式。 根据这一点,群集可以是由一个或多个频带中的一个或多个频道组成的任何组合。 在支持多集群访问时,可以在选择主集群并在其上执行退避(例如倒计时)时执行CSMA。 对于主集群的退避完成后,检查一个或多个其他集群的可用性,则可以使用可用集群进行传输。 或者,可以针对每个或多个(子集的)簇进行退避,或者甚至针对每个相应的簇进行退避。
    • 6. 发明申请
    • Explicit feedback format within single user, multiple user, multiple access, and/or MIMO wireless communications
    • 单用户,多用户,多路访问和/或MIMO无线通信中的显式反馈格式
    • US20120033592A1
    • 2012-02-09
    • US13196721
    • 2011-08-02
    • Joonsuk KimRon PoratVinko Erceg
    • Joonsuk KimRon PoratVinko Erceg
    • H04B1/66H04B7/00
    • H04B7/0452H04B7/0413H04B7/0417H04B7/043H04B7/0636H04B7/0689H04B7/0871H04L5/0048H04W88/06
    • Explicit feedback format within single user, multiple user, multiple access, and/or MIMO wireless communications. A beamformer provides a first communication to a beamformee, and based thereon, the beamformee may ascertain certain characteristics associated with the type and format of feedback to be provided to the beamformee via a second communication from the beamformee to the beamformer. For example, the first communication may include indication of a current operational mode, such as whether it is in accordance with single-user multiple input multiple output (SU-MIMO) or multi-user multiple-input-multiple-output (MU-MIMO). Also, the first communication may indicate a requested steering matrix's rank to be employed in accordance with subsequent beamforming by the beamformer. Also, additional information such as that pertaining to per-tone SNR values for each respective space-time stream, per-tone or per-sub-band eigen-values, the particular channel width being employed (e.g., 20, 40, 80, or 160 MHz), etc. may be included within the second communication.
    • 单用户,多用户,多路访问和/或MIMO无线通信中的显式反馈格式。 波束形成器向波束形成器提供第一通信,并且基于此,波束形成器可以确定通过从波束形成器到波束形成器的第二通信来提供给波束形成器的反馈的类型和格式相关联的某些特性。 例如,第一通信可以包括当前操作模式的指示,诸如它是否符合单用户多输入多输出(SU-MIMO)或多用户多输入多输出(MU-MIMO )。 此外,第一通信可以指示要根据波束形成器的后续波束成形采用的所请求的导向矩阵的等级。 此外,附加信息,例如关于每个相应时空流,每音调或每个子带本征值的每个音调SNR值,使用特定信道宽度的附加信息(例如,20,40,80, 或160MHz)等可以包括在第二通信内。
    • 8. 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
    • US20110075607A1
    • 2011-03-31
    • US12950139
    • 2010-11-19
    • Joonsuk KimMatthew James FischerPeiman AminiVinko Erceg
    • Joonsuk KimMatthew James FischerPeiman AminiVinko Erceg
    • H04W4/00
    • 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。