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公开(公告)号：US10361482B2
公开(公告)日：2019-07-23
申请号：US15220711
申请日：2016-07-27
Applicant: Cisco Technology, Inc.
Inventor： Stephen J. McCarthy , Matthew A. Silverman , Paul J. Stager
Abstract: An apparatus comprises an antenna array, a block of switches, a programmable logic device and a memory device. The antenna array comprises a plurality of antenna elements. The block of switches is configured to selectively connect respective ones of a subset of the plurality of antenna elements to corresponding ones of a plurality of transceivers in a host device. The programmable logic device is configured to communicate with the host device and to control the block of switches. The memory device is coupled to the programmable logic device, and is configured to store information allowing the host device to determine how to control connectivity of individual antenna elements to respective ones of the plurality of transceivers of the host device as part of transmit and/or receive operations of the host device.
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公开(公告)号：US09991972B1
公开(公告)日：2018-06-05
申请号：US15497969
申请日：2017-04-26
Applicant: Cisco Technology, Inc.
Inventor： Mithat C. Dogan , Matthew A. Silverman , Paul J. Stager , Brian D. Hart , Jiunming Huang
IPC: H04B15/00 , H04B17/12 , H04L25/02 , H04B7/06 , H04B7/0413
CPC classification number: H04B17/12 , H04B7/022 , H04B7/0617 , H04L25/0202
Abstract: Embodiments herein describe calibrating a plurality of radio heads having a plurality of wireless antennas. In one embodiment, the plurality of radio heads communicate a calibration signal in a round robin fashion such that each of the radio heads communicates a respective calibration signal to the remaining radio heads. In one embodiment, at least one of the radio heads is isolated from the remaining radio heads. The received calibration signals are then used to calibrate the radio heads. In one embodiment, a controller coupled with the plurality of radio heads calibrates the radio heads. The calibrated radio heads then communicate to one or more client devices.
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公开(公告)号：US09929792B2
公开(公告)日：2018-03-27
申请号：US15496056
申请日：2017-04-25
Applicant: Cisco Technology, Inc.
Inventor： Paul J. Stager , Matthew A. Silverman , Brian D. Hart , David Kloper
IPC: H04B1/00 , H04B7/08 , H04W88/08 , H04B7/0452 , H04B1/10
CPC classification number: H04B7/0885 , H04B1/1036 , H04B7/024 , H04B7/0452 , H04L25/03 , H04L43/16 , H04W88/085
Abstract: A system and method are provided for performing stomp-and-restart techniques in distributed MU-MIMO system. A plurality of radio head devices are provided that are configured to be deployed separated from each other in a coverage region of interest of a wireless network. A central processor subsystem is provided that is in communication with the plurality of radio head devices. The central processor subsystem configured to perform several operations based on downconverted samples received from the plurality of radio head devices.
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54.发明申请公开(公告)号：US20180034517A1
公开(公告)日：2018-02-01
申请号：US15220701
申请日：2016-07-27
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , Paul J. Stager , David Kloper , Jie Cheng Jiang
CPC classification number: H04B7/0452 , H04B7/024 , H04W84/12 , H04W88/08
Abstract: A wireless access point device wirelessly communicates with a plurality of wireless client devices. The wireless access point includes a central processor subsystem and a plurality of transceiver devices each including a plurality of antennas, and a plurality of radio transceivers, each of the plurality of transceiver devices configured for deployment throughout a coverage area, each transceiver device being connected to the central processor subsystem via a respective cable. The central processor subsystem distributes in-phase and quadrature baseband samples across the plurality of transceiver devices associated with traffic to be transmitted and received via the plurality of transceiver devices in one or more frequency bands so as to synthesize a wideband multiple-input multiple-output transmission channel and a wideband multiple-input multiple-output reception channel. The access point transmit and receive functions are “split” or partitioned across the plurality of transceivers devices.
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公开(公告)号：US09706514B2
公开(公告)日：2017-07-11
申请号：US14558205
申请日：2014-12-02
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , Brian D. Hart
CPC classification number: H04W64/00 , G01S5/0226 , G01S5/0273 , G01S5/04 , H04W84/12
Abstract: Techniques are presented herein for improving location determination of a wireless device in environments where there can be multipath issues. A wireless device having a plurality of antennas receives a wireless transmission from a target device whose location is to be determined. Channel state information data is generated based on reception of the transmission at the plurality of antenna. The channel state information data is separated or partitioned into subcarrier group specific data for each of a plurality of groups of subcarriers within a bandwidth of the received transmission. Location probability data is computed for each of the plurality of groups of subcarriers from the subcarrier group specific data for respective ones of the plurality of groups of subcarriers. The location probability data for the plurality of groups of subcarriers is combined to produce aggregate location probability data, from which a location of the target device is determined.
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Patent Agency Ranking
公开(公告)号：US20170127407A1
公开(公告)日：2017-05-04
申请号：US15407565
申请日：2017-01-17
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , Matthew A. Silverman , Paul J. Stager , David Kloper
IPC: H04W72/04 , H04B7/06 , H04B7/0452
CPC classification number: H04W72/0413 , H04B7/0452 , H04B7/0626 , H04L1/18 , H04L5/0048 , H04W72/042 , H04W84/12
Abstract: A method is provided in which a first wireless access point selects two or more of a plurality of client devices based on similarity of receive signal strength and carrier frequency offset with respect to the first wireless access point, and sends a downlink multi-user multiple-input multiple-output (MIMO) transmission to the two or more client devices. The downlink multi-user MIMO transmission is configured to solicit acknowledgments from the two or more client devices. The acknowledgments are received at a plurality of antennas of the first wireless access point from the two or more client devices. Uplink multi-user MIMO processing of the acknowledgments is performed from the two or more of the plurality of client devices to recover the acknowledgments respectively from each of the two or more client devices.
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公开(公告)号：US09584278B2
公开(公告)日：2017-02-28
申请号：US14796001
申请日：2015-07-10
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , Matthew A. Silverman , Paul J. Stager , David Kloper
CPC classification number: H04W72/0413 , H04B7/0452 , H04B7/0626 , H04L1/18 , H04L5/0048 , H04W72/042 , H04W84/12
Abstract: In accordance with an embodiment, a method is provided in which a first wireless access point sends a downlink multi-user multiple-input multiple-output (MIMO) transmission to a plurality of client devices. The downlink multi-user MIMO transmission is configured to solicit acknowledgments from two or more of the plurality of client devices. The acknowledgments are received at a plurality of antennas of the first wireless access point from the two or more of the plurality of client devices. Uplink multi-user MIMO processing of the acknowledgments is performed from the two or more of the plurality of client devices to recover the acknowledgments respectively from each of the two or more of the plurality of client devices.
Abstract translation: 根据实施例，提供了一种方法，其中第一无线接入点向多个客户端设备发送下行链路多用户多输入多输出（MIMO）传输。 下行链路多用户MIMO传输被配置为从多个客户端设备中的两个或多个客户端设备请求确认。 在多个客户端设备中的两个或更多个的第一无线接入点的多个天线处接收确认。 从多个客户端设备中的两个或多个客户机设备执行确认的上行链路多用户MIMO处理，以分别从多个客户端设备中的两个或多个客户机设备中的每一个恢复确认。
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58.发明申请公开(公告)号：US20160157201A1
公开(公告)日：2016-06-02
申请号：US14558205
申请日：2014-12-02
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , Brian D. Hart
IPC: H04W64/00
CPC classification number: H04W64/00 , G01S5/0226 , G01S5/0273 , G01S5/04 , H04W84/12
Abstract: Techniques are presented herein for improving location determination of a wireless device in environments where there can be multipath issues. A wireless device having a plurality of antennas receives a wireless transmission from a target device whose location is to be determined. Channel state information data is generated based on reception of the transmission at the plurality of antenna. The channel state information data is separated or partitioned into subcarrier group specific data for each of a plurality of groups of subcarriers within a bandwidth of the received transmission. Location probability data is computed for each of the plurality of groups of subcarriers from the subcarrier group specific data for respective ones of the plurality of groups of subcarriers. The location probability data for the plurality of groups of subcarriers is combined to produce aggregate location probability data, from which a location of the target device is determined.
Abstract translation: 本文介绍了在可能存在多路径问题的环境中改进无线设备的位置确定的技术。 具有多个天线的无线设备从要确定其位置的目标设备接收无线传输。 基于在多个天线处的发送的接收来生成信道状态信息数据。 信道状态信息数据被分离或分割为在接收的传输的带宽内的多个子载波组中的每一个的子载波组专用数据。 针对多个子载波组中的各个子载波组特定数据，针对多个子载波组中的每一个计算位置概率数据。 组合多个子载波组的位置概率数据以产生聚合位置概率数据，确定目标设备的位置。
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59.发明申请Probe Response Suppression Using Angle-Of-Arrival In A High Density Environment 有权使用高密度环境中的到达角度进行探测响应抑制公开(公告)号：US20150257117A1
公开(公告)日：2015-09-10
申请号：US14202654
申请日：2014-03-10
Applicant: Cisco Technology, Inc.
Inventor： Neil R. Diener , John Matthew Swartz , Paul J. Stager , Tak Ming Pang
Abstract: A first wireless device (e.g., an access point) receives a message from a second wireless device (e.g., a client device). The first device determines an angle-of-arrival of the message at a plurality of antennas of the first wireless device. The first device compares the angle-of-arrival with an angle-of-arrival threshold to determine whether to transmit a response message to the second wireless device. In one example, the first wireless device is a wireless access point device operating in a wireless network, the second wireless device is a wireless client device operating in the wireless network, the message is a probe request message and the response message is a probe response message.
Abstract translation: 第一无线设备（例如，接入点）从第二无线设备（例如，客户端设备）接收消息。 第一设备确定消息在第一无线设备的多个天线处的到达角度。 第一设备将到达角与入场角阈值进行比较，以确定是否向第二无线设备发送响应消息。 在一个示例中，第一无线设备是在无线网络中操作的无线接入点设备，第二无线设备是在无线网络中操作的无线客户端设备，该消息是探测请求消息，并且响应消息是探测响应 信息。
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公开(公告)号：US09112555B2
公开(公告)日：2015-08-18
申请号：US13678849
申请日：2012-11-16
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , James C. Nicholson
CPC classification number: H04B7/0426 , H04B7/0602 , H04L5/0023 , H04W52/42
Abstract: Techniques are presented herein to achieve reduced array gain associated with a transmission made from multiple antennas of a wireless communication device. In accordance with one technique, a wireless communication device is provided having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas. Subcarriers of at least one transmit signal to be weighted across the plurality of transmitters are allocated power so that for each subcarrier, only one transmitter is allocated a maximum power.
Abstract translation: 这里呈现技术以实现与由无线通信设备的多个天线制成的传输相关联的减少的阵列增益。 根据一种技术，提供了具有多个发射机的无线通信设备，每个发射机被配置为经由多个天线中的对应的一个发射。 在多个发射机之间要加权的至少一个发射信号的子载波被分配功率，使得对于每个子载波，只有一个发射机被分配最大功率。
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