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    SYNCHRONIZED WIRELESS SIGNAL TRANSMISSION BY ENDPOINTS CONTROLLED BY A CENTRAL CONTROLLER
    1.
    发明申请
    SYNCHRONIZED WIRELESS SIGNAL TRANSMISSION BY ENDPOINTS CONTROLLED BY A CENTRAL CONTROLLER 审中-公开

    公开(公告)号：US20190246368A1

    公开(公告)日：2019-08-08

    申请号：US16388571

    申请日：2019-04-18

    Applicant: Cisco Technology, Inc.

    Inventor： Paul J. STAGER ,  David S. KLOPER ,  Brian D. HART ,  Matthew A. SILVERMAN

    IPC: H04W56/00

    CPC classification number: H04W56/0015

    Abstract: Techniques are disclosed to synchronize wireless signal transmission by endpoints controlled by a central controller. For example, an example method of wireless communication includes receiving, at a first device, over a wired medium between the first device and a second device, a plurality of packets from the second device. Each of the plurality of packets comprises data representative of a portion of a signal corresponding to a wireless medium. The method further includes receiving, at the first device, from the second device over the wired medium a synchronization signal based on a common master clock at the second device. The method further includes synchronizing, at the first device, a local clock of the first device to the common master clock based on the synchronization signal. The method further includes reconstructing the signal corresponding to the wireless medium based on the plurality of packets and the synchronized local clock.

    ROAMING AND PROBE RESPONSES WITH REMOTE RADIO HEADS
    2.
    发明申请
    ROAMING AND PROBE RESPONSES WITH REMOTE RADIO HEADS 审中-公开

    公开(公告)号：US20180310191A1

    公开(公告)日：2018-10-25

    申请号：US15495503

    申请日：2017-04-24

    Applicant: Cisco Technology, Inc.

    Inventor： David S. KLOPER ,  Matthew A. SILVERMAN ,  Paul J. STAGER

    IPC: H04W24/08 ,  H04W48/16

    CPC classification number: H04W24/08 ,  H04W48/14 ,  H04W48/20 ,  H04W88/085

    Abstract: The present disclosure discloses a central controller controlling multiple radio heads (RHs) in a network. The central controller generates network information for the radio heads based on a probe request transmitted from a network device and received by one or more of the radio heads. The central controller calculates a respective metric value for each of the radio heads based on the network information. The metric value indicates a capability of a radio head to serve the network device. The central controller selects a subset of radio heads from the multiple radio heads to send a probe response to the network device based on the metric values.

    MU-MIMO GROUPING SYSTEM
    3.
    发明申请
    MU-MIMO GROUPING SYSTEM 审中-公开

    公开(公告)号：US20180234141A1

    公开(公告)日：2018-08-16

    申请号：US15431539

    申请日：2017-02-13

    Applicant: Cisco Technology, Inc.

    Inventor： Matthew A. SILVERMAN ,  Paul J. STAGER ,  David S. KLOPER ,  Brian D. HART ,  Qing ZHAO

    IPC: H04B7/0452 ,  H04L12/26

    CPC classification number: H04B7/0452 ,  H04L41/0893 ,  H04L43/0894

    Abstract: Embodiments herein describe a network device (e.g., an access point) that dynamically arranges multi-user (MU) multiple input multiple output (MIMO) compatible client devices into MU-MIMO groups. That is, the network device uses network metrics and historical data to change the assignment of client devices in the MU-MIMO groups which may improve MU-MIMO efficiency by reducing the amount of power that leaks between the clients devices in the group. In one embodiment, the AP identifies a MU-MIMO group based on a performance evaluation such as evaluating network metric or determining if the group is underutilized. The AP can replace the identified MU-MIMO group with a substitute MU-MIMO group where the substitute MU-MIMO group is selected based on historical data corresponding to the client devices assigned to the substitute MU-MIMO group.

    DISTRIBUTED OVERLAPPING BASIC SERVICE SET SCHEDULING TECHNIQUES FOR INCREASED SPECTRAL EFFICIENCY
    4.
    发明申请
    DISTRIBUTED OVERLAPPING BASIC SERVICE SET SCHEDULING TECHNIQUES FOR INCREASED SPECTRAL EFFICIENCY 有权

    公开(公告)号：US20210022156A1

    公开(公告)日：2021-01-21

    申请号：US16512251

    申请日：2019-07-15

    Applicant: Cisco Technology, Inc.

    Inventor： Gautam D. BHANAGE ,  Brian D. HART ,  David S. KLOPER

    IPC: H04W72/12 ,  H04W72/04 ,  H04W80/08 ,  H04W88/08

    Abstract: Techniques for triggering multiple basic service sets (BSSs) to share resources for a coordinated transmission are described. One technique includes determining a first amount of data available to send in a first BSS and determining a second amount of data available to send in a second BSS. The first BSS and the second BSS form an overlapping BSS. An amount of resources in the first BSS that is available to share with the second BSS for a coordinated transmission from the first BSS and the second BSS is determined based on the first amount of data and the second amount of data. A frame that includes an indication of the amount of resources is generated and transmitted to at least one of the first BSS and the second BSS.

    INTERMEDIATE DISTRIBUTION FRAME FOR DISTRIBUTED RADIO HEADS
    5.
    发明申请
    INTERMEDIATE DISTRIBUTION FRAME FOR DISTRIBUTED RADIO HEADS 审中-公开

    公开(公告)号：US20180287772A1

    公开(公告)日：2018-10-04

    申请号：US15479077

    申请日：2017-04-04

    Applicant: Cisco Technology, Inc.

    Inventor： David S. KLOPER ,  Brian D. HART ,  Paul J. STAGER

    IPC: H04L7/00 ,  H04L12/10

    CPC classification number: H04L7/0012 ,  H04L12/10

    Abstract: Embodiments herein describe using an intermediate distribution frame (IDF) which is connected between a central controller and a plurality radio heads which each include at least one antenna for wireless communication with a user device. Instead of running separate cables to each of the radio heads, a single cable can be used to connect the IDF to the central controller and then separate cables can be used to connect the IDF to the radio heads. If the IDF is disposed near the radio heads, the amount of cables can be reduced. Moreover, the IDF may recover a clock signal used by the central controller and forward that clock to the plurality of radio head in order to synchronize the radio heads to the central controller.

    UPDATING PRECODING MATRIX FOR MIMO TRANSMISSIONS
    9.
    发明申请
    UPDATING PRECODING MATRIX FOR MIMO TRANSMISSIONS 审中-公开

    公开(公告)号：US20180287674A1

    公开(公告)日：2018-10-04

    申请号：US15477620

    申请日：2017-04-03

    Applicant: Cisco Technology, Inc.

    Inventor： David S. KLOPER ,  Mithat C. DOGAN ,  Matthew A. SILVERMAN ,  Brian D. HART ,  Jiunming HUANG

    IPC: H04B7/0456 ,  H04B7/06

    CPC classification number: H04B7/0452 ,  H04B7/0426

    Abstract: The present disclosure discloses that a device uses precoding to transmit independent data streams to existing users and additional independent data streams to one or more new users simultaneously. During a first transmission of a first one or more data streams that are precoded using a first precoding matrix, the device determines to transmit a second one or more data streams in a second transmission. Before the first transmission is complete, the device calculates a combined precoding matrix for precoding the first one or more data streams and the second one or more data streams. The device transmits the first one or more data streams in the first transmission and the second one or more data streams in the second transmission simultaneously using the combined precoding matrix.

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