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    Distributed-input OFDM angle-of-arrival scheme for location determination
    32.
    发明授权
    Distributed-input OFDM angle-of-arrival scheme for location determination 有权
    用于位置确定的分布式输入OFDM到达角度方案

    公开(公告)号：US09521520B2

    公开(公告)日：2016-12-13

    申请号：US14078824

    申请日：2013-11-13

    Applicant: Cisco Technology, Inc.

    Inventor： Matthew A. Silverman ,  Paul J. Stager

    IPC: G01S19/00 ,  H04B17/00 ,  H04W24/00 ,  H04W4/02 ,  H04W64/00 ,  H04B7/08 ,  G01S5/00 ,  G01S13/87 ,  H04B7/04

    CPC classification number: H04W4/023 ,  G01S5/0036 ,  G01S13/878 ,  H04B7/0404 ,  H04B7/086 ,  H04W24/00 ,  H04W64/00

    Abstract: A particular first wireless device having a plurality of antennas and that is part of a group of a plurality of first wireless devices, transmits to a second wireless device (whose location is to be determined) a packet across the plurality of antennas of the particular first wireless device simultaneously with a plurality of packets transmitted by a corresponding one of other first wireless devices in the group. The packet transmitted by the particular first wireless device uses a subset of a set of subcarriers available for use in the packet such that substantially the entire set of subcarriers are used in the aggregate across the plurality of packets simultaneously transmitted by the plurality of first wireless devices in the group to the second wireless device. The simultaneous reception of the plurality of packets at the second wireless device enables the second wireless device to determine its location.

    Abstract translation: 具有多个天线并且是多个第一无线设备的组的一部分的特定的第一无线设备向特定第一无线设备的多个天线中的分组传送到第二无线设备（其位置将被确定） 无线设备与由组中的其他第一无线设备中的相应一个发送的多个分组同时进行。 由特定第一无线设备发送的分组使用可用于分组中的一组子载波的子集，使得基本上整个子载波集合在由多个第一无线设备同时发送的多个分组之间的集合中使用 在组中到第二个无线设备。 在第二无线设备处同时接收多个分组使得第二无线设备能够确定其位置。

    High Density Deployment Using Transmit or Transmit-Receive Interference Suppression with Selective Channel Dimension Reduction/Attenuation and Other Parameters
    34.
    发明申请
    High Density Deployment Using Transmit or Transmit-Receive Interference Suppression with Selective Channel Dimension Reduction/Attenuation and Other Parameters 审中-公开
    使用发射或发射接收干扰抑制与选择性信道尺寸减小/衰减和其他参数的高密度部署

    公开(公告)号：US20150131593A1

    公开(公告)日：2015-05-14

    申请号：US14600300

    申请日：2015-01-20

    Applicant: Cisco Technology, Inc

    Inventor： Paul J. Stager ,  Matthew A. Silverman ,  Zhigang Gao ,  John Blosco ,  Raghuram Rangarajan

    IPC: H04W72/08 ,  H04L5/00 ,  H04W72/04

    CPC classification number: H04W72/082 ,  H04L5/0073 ,  H04W24/02 ,  H04W72/0426 ,  H04W72/046 ,  H04W84/12 ,  H04W88/08

    Abstract: In a wireless local area network, each of multiple access points, in a high density deployment, are configured to suppress co-channel interference. A first access point having a plurality of antennas beamforms a transmission to a wireless client device within a null-space or with the weakest singular eigenmodes of a wireless channel between the first access point and at least one co-channel second access point. Techniques are presented herein for situations in which any given access point has two or more co-channel access points. In addition, an access point may perform receive side suppression with respect to a transmission (made by a co-channel access point to one of its associated wireless client devices) that is received from that co-channel access point.

    Abstract translation: 在无线局域网中，高密度部署中的多个接入点中的每一个被配置为抑制同信道干扰。 具有多个天线的第一接入点波束在零空间内或在第一接入点与至少一个同频道第二接入点之间的无线信道的最弱奇异本征模式中形成向无线客户端设备的传输。 本文给出了任何给定接入点具有两个或更多个同频道接入点的情况的技术。 此外，接入点可以针对从该同频道接入点接收到的传输（由与其相关联的无线客户端设备之一的同频道接入点进行的）进行接收侧抑制。

    Systems and Methods to Delegate Out-of-Band Management of a Shared Ultra-Wideband Clock
    35.
    发明申请
    Systems and Methods to Delegate Out-of-Band Management of a Shared Ultra-Wideband Clock 有权

    公开(公告)号：US20250062790A1

    公开(公告)日：2025-02-20

    申请号：US18933115

    申请日：2024-10-31

    Applicant: Cisco Technology, Inc.

    Inventor： Matthew A. Silverman ,  Robert C. Badea ,  Jerome Henry ,  Robert E. Barton

    IPC: H04B1/7183 ,  H04W64/00 ,  H04W76/10

    Abstract: A system and a method to delegate out-of-band (OOB) management of a shared ultra-wideband (UWB) clock. The system may comprise a tagged device with a UWB tag and multiple anchors. The tagged device may be configured to establish at least one OOB communication link with at least one anchor, transmit UWB compatibility information to multiple anchors, establish a UWB communication links with the anchors, and exchange OOB synchronization parameters and UWB synchronization parameters with the anchors. Further, the tagged device may be configured to define new instructions for ranging round operations based at least in part upon the OOB synchronization parameters and the UWB synchronization parameters, update existing instructions with the new instructions in the ranging round operations, and perform the ranging round in accordance with the updated instructions.

    Identifying client device locations through group-based access point voting
    39.
    发明授权
    Identifying client device locations through group-based access point voting 有权

    公开(公告)号：US11460534B2

    公开(公告)日：2022-10-04

    申请号：US16748704

    申请日：2020-01-21

    Applicant: Cisco Technology, Inc.

    Inventor： Zhigang Gao ,  Matthew A. Silverman ,  Paul J. Stager ,  Huaiyi Wang

    IPC: G01S3/02 ,  G01S5/02 ,  G01S5/04 ,  H04W84/12

    Abstract: Embodiments herein describe performing AoA resolving to identify a plurality of AoAs corresponding to a multipath signal and then using AP voting to identify a location of the client device. AoA resolving enables an AP to identify the different angles at which a multipath signal reaches the AP. That is, due to reflections, a wireless signal transmitted by a single client device may reach the AP using multiple paths that each has their own AoA. The AP can perform AoA resolving to identify the AoAs for the different paths in a multipath signal. In one embodiment, the AoAs for two APs (or a subset of the APs) can be used to identify cross points or intersection points that represent candidate locations of the client device. A voting module can determine whether those cross points corresponds to AoAs identified by the remaining APs.

    Mapping bit positions using predicted error values
    40.
    发明授权
    Mapping bit positions using predicted error values 有权

    公开(公告)号：US11374704B2

    公开(公告)日：2022-06-28

    申请号：US16869311

    申请日：2020-05-07

    Applicant: Cisco Technology, Inc.

    Inventor： Huaiyi Wang ,  Brian D. Hart ,  Matthew A. Silverman ,  Zhigang Gao

    IPC: H04L1/20 ,  H04L1/00 ,  G16Y40/10

    Abstract: Aspects described herein include a method comprising predicting, based on one or more transmission characteristics, error values for a sequence of bit positions used for modulating data within a packet. The method further comprises generating a bitmap that maps one or more payload bits and one or more padding bits of the packet to respective bit positions of the sequence. The one or more padding bits are preferentially mapped to respective bit positions having relatively greater error values. The method further comprises modulating the sequence according to the bitmap.

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