公开(公告)号：US10218416B2

公开(公告)日：2019-02-26

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: H04B7/04 ,  H04B7/0452 ,  H04L12/26 ,  H04L12/24

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.

公开(公告)号：US09999034B2

公开(公告)日：2018-06-12

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: H04B7/02 ,  H04B7/04 ,  H04L5/00 ,  H04W72/04 ,  H04B7/0452 ,  H04B7/06 ,  H04W84/12

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.

公开(公告)号：US09668149B1

公开(公告)日：2017-05-30

申请号：US15163915

申请日：2016-05-25

Applicant: Cisco Technology, Inc.

Inventor： Paul J. Stager ,  Matthew A. Silverman ,  Brian D. Hart ,  David Kloper

IPC: H04B7/10 ,  H04W24/02 ,  H04W74/08 ,  H04L12/26 ,  H04L25/03 ,  H04B7/0452

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.

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

IPC: H04W72/04 ,  H04W64/00 ,  H04W4/02

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.

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

IPC: H04L9/32 ,  H04W12/08 ,  H04W64/00

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。

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

CPC classification number: H04W16/28 ,  H04B7/024

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。

公开(公告)号：US20250142615A1

公开(公告)日：2025-05-01

申请号：US18494822

申请日：2023-10-26

Applicant: Cisco Technology, Inc.

Inventor： Malcolm M. Smith ,  Brian D. Hart ,  Sanjay Katabathuni

IPC: H04W74/04 ,  H04W28/26 ,  H04W72/1263 ,  H04W72/27 ,  H04W74/00

Abstract: Basic Service Set (BSS) resource reservation may be provided. BSS resource reservation may include determining a time window for a to accommodate a transmission of a target Station (STA) in a BSS, wherein the BSS further comprises one or more other STAs. An AP may then transmit a reservation scheduling frame, to claim access of a channel, inform the target STA of the time window, and reserve the channel for a duration defined by the time window.

公开(公告)号：US20240381233A1

公开(公告)日：2024-11-14

申请号：US18541052

申请日：2023-12-15

Applicant: Cisco Technology, Inc.

Inventor： Indermeet S. Gandhi ,  Brian D. Hart ,  Jerome Henry ,  Shailender Potharaju

IPC: H04W48/16 ,  H04W28/02

Abstract: Improving network throughput and, specifically, improving network throughput for networks comprising sub-7.25 GHz and millimeter wave links may be provided. Improving network throughput may include determining device information of a Station (STA). The STA may be enabled to communicate on a 60 (GHz) band in addition to sub 7.25 GHz bands based on the device information.

公开(公告)号：US12120153B2

公开(公告)日：2024-10-15

申请号：US18361779

申请日：2023-07-28

Applicant: Cisco Technology, Inc.

Inventor： Malcolm M. Smith ,  Jerome Henry ,  Pooya Monajemi ,  Brian D. Hart ,  David S. Kloper

IPC: H04L9/40 ,  H04W12/08

CPC classification number: H04L63/20 ,  H04W12/08

Abstract: A device includes a memory and a hardware processor communicatively coupled to the memory. The hardware processor determines that a computing device communicatively coupled to an access point performed an action with respect to the access point and in response to determining that the action causes a deviation from a multi-user uplink policy of the access point, transmits a disciplinary message to the computing device.

公开(公告)号：US20240298178A1

公开(公告)日：2024-09-05

申请号：US18495441

申请日：2023-10-26

Applicant: Cisco Technology, Inc.

Inventor： Jerome Henry ,  Brian D. Hart ,  Peiman Amini ,  Stephen M. Orr ,  Sudhir K. Jain

IPC: H04W12/069 ,  H04L9/32 ,  H04W12/63

CPC classification number: H04W12/069 ,  H04L9/3242 ,  H04W12/63

Abstract: Fine Time Measurement (FTM) Location Configuration Information (LCI) protection and, specifically, FTM LCI protection with authentication and selective client enablement may be provided. To perform FTM LCI protection, a controller may first obtain a key-pair including a public key and a private key from a Certificate Authority (CA). The controller my determine a venue location where an Access Point (AP) is located. The controller may send a Certificate Signing Request (CSR) with the venue location to the CA. In response to sending the CSR, the controller may receive a public key certificate from the CA, wherein the public key certificate includes the venue location. The AP may receive a request for Location Configuration Information (LCI) from a Station (STA), wherein the LCI includes an AP location. The AP creates a hash of LCI of the AP using the private key and sends the LCI and the hash to the STA.