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公开(公告)号：US09648615B2
公开(公告)日：2017-05-09
申请号：US14558200
申请日：2014-12-02
Applicant: Cisco Technology, Inc.
Inventor： Shaunak Joshi , Paul J. Stager , Brian D. Hart , Santosh Pandey , Matthew A. Silverman
CPC classification number: H04W72/0446 , H04W4/02 , H04W64/00
Abstract: A plurality of time slots are allocated during which a location procedure is performed for one or more target wireless devices. Select ones of a plurality of wireless access points at different positions are assigned to each time slot such that multiple wireless access points assigned to a given time slot are sufficiently separated. In addition, wireless access points are assigned to a corresponding one of a plurality of groups for each time slot such that wireless access points assigned to a group tune to a channel used by a wireless access point in the group that transmits one or more frames that are intended to provoke one or more response frames from the one or more wireless devices.
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公开(公告)号：US09258713B2
公开(公告)日：2016-02-09
申请号：US14278555
申请日：2014-05-15
Applicant: Cisco Technology, Inc.
Inventor： Raghuram Rangarajan , Brian D. Hart , Sujai Hajela , Santosh Pandey , David Kloper , Greg Corsetto , Allen J. Huotari
CPC classification number: H04W12/08 , H04W4/80 , H04W12/12 , H04W64/003
Abstract: Techniques are presented for detecting rogue wireless beacon devices. Wireless transmissions from beacon devices are received at a plurality of receiver devices. The wireless transmissions of the beacon devices comprise packets that carry information used for location-based services for mobile wireless devices. Content of one or more fields of the packets transmitted by the beacon devices and received by one or more of the receiver devices is obtained. The content of one or more fields of the packets is analyzed to detect an unauthorized beacon device. The analyzing operation may involve comparing the content of the one or more fields of the packets against a list that contains one or more identifiers for authorized beacon devices. In another form, analyzing may involve analyzing the content of the one or more fields of the packets with pattern information related to advertising content or advertising source.
Abstract translation: 提供了用于检测流氓无线信标设备的技术。 在多个接收机设备处接收来自信标设备的无线传输。 信标设备的无线传输包括携带用于移动无线设备的基于位置的服务的信息的分组。 获得由信标设备发送并由一个或多个接收机设备接收的分组的一个或多个字段的内容。 分析分组的一个或多个字段的内容以检测未经授权的信标设备。 分析操作可以包括将分组的一个或多个字段的内容与包含用于授权信标设备的一个或多个标识符的列表进行比较。 在另一种形式中，分析可以包括利用与广告内容或广告源相关联的模式信息来分析分组的一个或多个字段的内容。
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13.发明申请Distributed Processing Distributed-Input Distributed-Output (DIDO) Wireless Communication 有权分布式处理分布式输入分布式输出（DIDO）无线通信公开(公告)号：US20140241240A1
公开(公告)日：2014-08-28
申请号：US13780513
申请日：2013-02-28
Applicant: CISCO TECHNOLOGY, INC.
Inventor： David Kloper , Brian D. Hart , Paul J. Stager , Matthew A. Silverman
IPC: H04W16/28
Abstract: Techniques are presented for distributed processing Distributed-Input Distributed-Output (DIDO) wireless communication. A plurality of base stations (e.g., APs) are provided, each configured to wirelessly serve one or more wireless devices (e.g., clients). At least first and second base stations are configured to transmit simultaneously at an agreed upon time. The first and second base stations are each configured to locally generate steering matrix information used to spatially precode their respective data transmissions in order to steer their respective data transmissions to their one or more wireless devices while nulling to the one or more client devices of the other base station. Moreover, the first and second base stations are each configured to locally generate a transmit waveform by applying the steering matrix information to their respective data transmissions.
Abstract translation: 提出了分布式处理分布式输入分布式输出（DIDO）无线通信的技术。 提供了多个基站（例如，AP），每个基站被配置为无线地服务于一个或多个无线设备（例如，客户端）。 至少第一和第二基站被配置为在商定的时间同时传输。 第一和第二基站各自被配置为本地生成用于对其各自的数据传输进行空间预编码的导向矩阵信息，以便将它们各自的数据传输转向其一个或多个无线设备，同时使另一个或多个无线设备的一个或多个客户端设备归零 基站。 此外，第一和第二基站各自被配置为通过将导引矩阵信息应用于它们各自的数据传输来本地生成发送波形。
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公开(公告)号：US20240023179A1
公开(公告)日：2024-01-18
申请号：US17812739
申请日：2022-07-15
Applicant: Cisco Technology, Inc.
Inventor： Pooya Monajemi , Ardalan Alizadeh , Matthew Aaron Silverman , Brian D. Hart , Vishal Satyendra Desai , Santosh Babaji Kulkarni , Young IL Choi
IPC: H04W76/15
Abstract: An arrangement of three radios maybe provided. The three radios define first and second outer data links and a middle data link. Access to the arrangement of three radios can be biased to the middle data link in one direction upon a data transmission through the first and second outer data links being dominate in an opposite direction. Data transmission with enhanced multi-link single radio (eMLSR) client devices can be prioritized lower than data transmission with simultaneous transmit and receive radio (STR) client devices and non-simultaneous transmit and receive radio (NSTR) client devices. A radio can be configured for data transmission with a client device. The range of the radio is limited when the data traffic through the radio exceeds a determined number of bytes of data in a determined amount of time.
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公开(公告)号：US10979251B2
公开(公告)日：2021-04-13
申请号：US16378411
申请日：2019-04-08
Applicant: Cisco Technology, Inc.
Inventor： Mithat C. Dogan , Brian D. Hart , Jiunming Huang , Matthew A. Silverman
IPC: H04L25/02 , H04B7/0413 , H04L25/03 , H04W84/12 , H04W88/12
Abstract: The embodiments herein use a factorization based technique for determining filter coefficients for a subset of the subcarriers in a wireless frequency band. Once the filter coefficients for the subset of the subcarriers are calculated, the network device uses these filter coefficients to identify the filter coefficients in a neighboring subcarrier. To do so, the network device uses pseudo-inverse iteration to convert the already calculated filter coefficients into filter coefficients for a neighboring subcarrier. The network device can repeat this process for the next set of neighboring subcarriers until all the filter coefficients have been calculated.
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Patent Agency Ranking
16.发明授权公开(公告)号：US10952156B2
公开(公告)日：2021-03-16
申请号：US16421175
申请日：2019-05-23
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , David Kloper , Pooya Monajemi , Vishal S. Dasai
Abstract: Augmenting a neighbor report with uplink Received Signal Strength Indicators (RSSIs) may be provided. First, a conducted transmit power value of a client device may be determined. A plurality of RSSI uplink values respectively corresponding to a plurality of Access Points (APs) may then be determined. Next, a plurality of RSSI downlink values respectively corresponding to the plurality of APs may be determined based on the respective plurality of RSSI uplink values, a respective plurality of conducted transmit power values corresponding to the plurality of APs, and the conducted transmit power value of the client device. A plurality of quality metrics respectively corresponding to the plurality of APs may then be determined based on the determined plurality of RSSI uplink values and the determined plurality of RSSI downlink values. Then, a neighbor report may be optimized based on the plurality of quality metrics.
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17.发明申请公开(公告)号：US20200015220A1
公开(公告)日：2020-01-09
申请号：US16504972
申请日：2019-07-08
Applicant: Cisco Technology, Inc.
Inventor： Benjamin Jacob Cizdziel , Brian D. Hart , Pooya Monajemi , David Kloper
Abstract: Bypassing radar in wide Dynamic Frequency Selection (DFS) channels utilizing puncturing may be provided. A first client device may be classified as eligible for puncturing and a second client device may be classified as not eligible for puncturing. Next, it may be determined that a subchannel in a bandwidth range should not be used. Then, in response to determining that the subchannel in the bandwidth range should not be used, the first client device may be steered to a first subset of the bandwidth range and the second client device may be steered to a second subset of the bandwidth range. The second subset of the bandwidth range may be smaller than the first subset of the bandwidth range.
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18.发明申请公开(公告)号：US20190245593A1
公开(公告)日：2019-08-08
申请号：US16383915
申请日：2019-04-15
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , Paul J. Stager , David Kloper , Jie Cheng Jiang
IPC: H04B7/0452 , H04B7/024
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：US20190158157A1
公开(公告)日：2019-05-23
申请号：US15819254
申请日：2017-11-21
Applicant: Cisco Technology, Inc.
Inventor： Xiaoli Ma , Hongyi Fu , Brian D. Hart , Matthew A. Silverman
IPC: H04B7/0452 , H04L25/02 , H04L27/26
Abstract: A wireless device, such as an wireless access point, receives signals detected by a plurality of antennas of a wireless device to produce a plurality of antenna-specific receive signals potentially representing a wireless transmission received from each of one or a plurality of devices. A signal processing component of the wireless device, such as a modem, performs several operations on the antenna-specific receive signals, including building a first space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a first device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the first device, and building a second space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a second device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the second device.
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20.发明授权公开(公告)号：US10285148B2
公开(公告)日：2019-05-07
申请号：US15582024
申请日：2017-04-28
Applicant: Cisco Technology, Inc.
Inventor： Paul J. Stager , David S. Kloper , Brian D. Hart , Matthew A. Silverman
IPC: H04W56/00
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.
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