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    RSSI LOCATION TRACKING VIA RADIO SCANNING FOR TRIGGERED OFDMA UPLINK
    2.
    发明公开
    RSSI LOCATION TRACKING VIA RADIO SCANNING FOR TRIGGERED OFDMA UPLINK 审中-公开

    公开(公告)号：US20230199432A1

    公开(公告)日：2023-06-22

    申请号：US17555598

    申请日：2021-12-20

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Matthew Aaron Silverman ,  John Matthew Swartz ,  Ardalan Alizadeh ,  Jerome Henry

    IPC: H04W4/029 ,  H04B17/318

    CPC classification number: H04W4/029 ,  H04B17/318 ,  H04W84/12

    Abstract: This technology allows for determining the location of client devices via radio scanning for triggered orthogonal frequency-division multiple access (“OFDMA”) uplinks. Access points (“APs”) are configured for OFDMA transmissions. A first AP transmits a trigger frame on particular channel to stations in the wireless network. Neighboring APs scan channels for trigger frames (“TF”). Upon detection of a TF, neighboring APs associate a station identifier with a frequency allocation, or resource unit, in the TF. The neighboring APs receive an OFDMA uplink from the stations, determine a received signal strength indicator (“RSSI”) value for each frequency allocation in the OFDMA uplink, and transmit the RSSI values with the associated station identifier to the first AP. The first AP determines the location of each station by mapping a distance value to the RSSI values.

    Probe response suppression using angle-of-arrival in a high density environment
    6.
    发明授权
    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：US09357519B2

    公开(公告)日：2016-05-31

    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

    IPC: H04W48/02 ,  H04W64/00 ,  H04W48/14 ,  H04W48/06

    CPC classification number: H04W64/00 ,  H04W8/005 ,  H04W48/06 ,  H04W48/14

    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。

    RSSI location tracking via radio scanning for triggered OFDMA uplink
    7.
    发明授权
    RSSI location tracking via radio scanning for triggered OFDMA uplink 有权

    公开(公告)号：US12231987B2

    公开(公告)日：2025-02-18

    申请号：US17555598

    申请日：2021-12-20

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Matthew Aaron Silverman ,  John Matthew Swartz ,  Ardalan Alizadeh ,  Jerome Henry

    IPC: H04W4/029 ,  H04B17/318 ,  H04W84/12

    Abstract: This technology allows for determining the location of client devices via radio scanning for triggered orthogonal frequency-division multiple access (“OFDMA”) uplinks. Access points (“APs”) are configured for OFDMA transmissions. A first AP transmits a trigger frame on particular channel to stations in the wireless network. Neighboring APs scan channels for trigger frames (“TF”). Upon detection of a TF, neighboring APs associate a station identifier with a frequency allocation, or resource unit, in the TF. The neighboring APs receive an OFDMA uplink from the stations, determine a received signal strength indicator (“RSSI”) value for each frequency allocation in the OFDMA uplink, and transmit the RSSI values with the associated station identifier to the first AP. The first AP determines the location of each station by mapping a distance value to the RSSI values.

    PHASE LOCK LOOP PHASE AMBIGUITY MITIGATION FOR MULTI-LINK OPERATION EXTRAPOLATED SOUNDING
    8.
    发明申请
    PHASE LOCK LOOP PHASE AMBIGUITY MITIGATION FOR MULTI-LINK OPERATION EXTRAPOLATED SOUNDING 有权

    公开(公告)号：US20240380640A1

    公开(公告)日：2024-11-14

    申请号：US18356550

    申请日：2023-07-21

    Applicant: Cisco Technology, Inc.

    Inventor： Matthew Aaron Silverman ,  Malcolm Muir Smith ,  Brian Donald Hart ,  Indermeet Singh Gandhi ,  John Matthew Swartz

    IPC: H04L25/02 ,  H04W88/08

    Abstract: The present disclosure is directed to simultaneous channel sounding on multiple MLO channels followed by determining phase and amplitude corrections based on channel impulse responses obtained on each MLO channel. The corrections are then used in subsequent extrapolation of channel sounding on one channel to another. In one aspect, a method includes transmitting, on each radio interface of a first multi-link device, a corresponding sounding probe to a second multi-link device; determining, by each radio interface of the first multi-link device, a corresponding channel impulse response based on the corresponding sound probe to yield a plurality of channel impulse responses; determining an offset between the plurality of channel impulse responses; and using the offset during a subsequent extrapolation of a sounding probe on one radio interface to a second radio interface of the first multi-link device.

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