公开(公告)号：US20160157225A1

公开(公告)日：2016-06-02

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.

Abstract translation: 分配多个时隙，在该时隙期间为一个或多个目标无线设备执行定位过程。 将选择不同位置的多个无线接入点中的一个分配给每个时隙，使得分配给给定时隙的多个无线接入点被充分分离。 此外，无线接入点被分配给每个时隙的多个组中的相应一个组，使得分配给组乐曲的无线接入点被组中的无线接入点使用的信道发送一个或多个帧， 旨在引起来自一个或多个无线设备的一个或多个响应帧。

公开(公告)号：US20160069978A1

公开(公告)日：2016-03-10

申请号：US14476997

申请日：2014-09-04

Applicant: Cisco Technology, Inc.

Inventor： Raghuram Rangarajan ,  Brian D. Hart

IPC: G01S1/08

CPC classification number: G01S1/08 ,  G01S5/0226 ,  G01S5/0252 ,  H04W4/02 ,  H04W4/80 ,  H04W84/12

Abstract: A computing entity, such as a server, obtains a first, second, and third set of measurements based on wireless transmissions between one or more beacon devices, a wireless client device, and one or more wireless access points in a wireless network. The first set of measurements is associated with wireless transmissions from the beacon device(s) received at the wireless access points. The second set of measurements is associated with wireless transmissions between the wireless client device and the wireless access points. The third set of measurements is associated with wireless transmissions from beacon devices received at the wireless client device. An estimated location of the wireless client device is generated based on the first set of measurement data, the second set of measurement data, and the third set of measurement data.

Abstract translation: 诸如服务器的计算实体基于无线网络中的一个或多个信标设备，无线客户端设备和一个或多个无线接入点之间的无线传输来获得第一，第二和第三测量集合。 第一组测量与来自在无线接入点处接收的信标设备的无线传输相关联。 第二组测量与无线客户端设备和无线接入点之间的无线传输相关联。 第三组测量与在无线客户端设备处接收的信标设备的无线传输相关联。 基于第一组测量数据，第二组测量数据和第三组测量数据来生成无线客户端设备的估计位置。

公开(公告)号：US09241275B2

公开(公告)日：2016-01-19

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 ,  H04B7/02

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：US20150373665A1

公开(公告)日：2015-12-24

申请号：US14837100

申请日：2015-08-27

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart

IPC: H04W64/00 ,  H04W4/06 ,  H04W4/02

CPC classification number: H04W64/003 ,  H04W4/02 ,  H04W4/06 ,  H04W64/00 ,  H04W84/12

Abstract: Techniques are presented herein to coordinate ranging exchanges between base stations in order to enable any number of wireless devices in the vicinity of the base stations to obtain signals associated with ranging exchanges between base stations, time-of-departure report messages transmitted by the base stations to each other and time-of-arrival report messages transmitted by the base stations to each other, for use in computing the location of the wireless devices. Based on the multi-channel time-of-arrivals computed for the wireless device with respect to each base station, the multi-channel time-of-arrivals contained in the time-of-arrival report messages transmitted between base stations and the known locations of the base stations, a physical location is computed for the wireless device.

Abstract translation: 这里介绍了技术来协调基站之间的测距交换，以使得基站附近的任何数量的无线设备能够获得与基站之间的测距交换相关联的信号，由基站发送的发往时间的报告消息 彼此之间以及由基站彼此发送的到达时间报告消息，以用于计算无线设备的位置。 基于针对每个基站为无线设备计算的多信道到达时间，包括在基站和已知位置之间传送的到达时间报告消息中的多信道到达时间 的基站，为无线设备计算物理位置。

公开(公告)号：US20150334676A1

公开(公告)日：2015-11-19

申请号：US14278546

申请日：2014-05-15

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  Raghuram Rangarajan ,  Sujai Hajela ,  Gregory H. Yamanishi ,  Gracia Wang ,  Allen J. Huotari

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

CPC classification number: H04W4/029 ,  H04L69/22 ,  H04W4/02 ,  H04W4/80 ,  H04W64/00 ,  H04W64/003

Abstract: Wireless transmissions from beacon devices are received at a plurality of receiver devices. The wireless transmissions comprise packets that carry information used for location-based services for mobile wireless devices. Content of one or more fields of the beacon packets received by one or more of the plurality of receiver devices is obtained. Measurement data associated with the transmissions received at the plurality of receiver devices is generated. Locations of the respective beacon devices are computed from the measurement data obtained by the plurality of receiver devices. Information identifying detected beacon devices and their locations are stored to maintain a location history of beacon devices over time locations. Changes from information contained in the location history are detected based on the locations computed for respective beacon devices from the measurement data and content of one or more fields of detected beacon packets.

Abstract translation: 在多个接收机设备处接收来自信标设备的无线传输。 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。 获得由多个接收机设备中的一个或多个接收的信标分组的一个或多个字段的内容。 产生与在多个接收机设备处接收的传输相关联的测量数据。 根据由多个接收机设备获得的测量数据计算各个信标设备的位置。 识别检测到的信标设备及其位置的信息被存储以维持随着时间位置的信标设备的位置历史。 基于从测量数据和检测到的信标分组的一个或多个字段的内容中针对各个信标设备计算的位置检测位置历史中包含的信息的变化。

公开(公告)号：US20150334569A1

公开(公告)日：2015-11-19

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: 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：US08971273B2

公开(公告)日：2015-03-03

申请号：US13647517

申请日：2012-10-09

Applicant: Cisco Technology, Inc.

Inventor： Douglas Chan ,  Mansoor Ahmed ,  Ahmadreza Hedayat ,  Brian D. Hart

IPC: H04W4/00

CPC classification number: H04W72/082 ,  H04W72/0453 ,  H04W84/12

Abstract: Dynamic bandwidth selection techniques are provided for a plurality of wireless access point devices that operate in a wireless local area network. Each access point device is capable of serving wireless client devices with a bandwidth from a set of possible bandwidths associated with one or multiple contiguous or non-contiguous radio frequency channels. A bias is generated based on determined type of traffic or client composition for each access point device, the bias favoring a channel assignment that results in a particular bandwidth in the set of bandwidths. The bias is applied to metrics representing severity and degree of interference for each channel to generate adjusted metrics. A bandwidth from the set of possible bandwidths is selected for each access point device based on the adjusted metrics.

Abstract translation: 为在无线局域网中操作的多个无线接入点设备提供动态带宽选择技术。 每个接入点设备能够从与一个或多个连续或不连续射频信道相关联的一组可能带宽中为带宽提供无线客户端设备。 基于针对每个接入点设备的确定的业务类型或客户端组合产生偏差，偏好有利于导致该组带宽中的特定带宽的信道分配。 该偏差被应用于表示每个信道的严重性和干扰程度以产生经调整的度量的度量。 基于经调整的度量，为每个接入点设备选择来自该组可能带宽的带宽。