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    Detecting proximity of devices based on transmission of inaudible sound signatures in the speech band
    32.
    发明授权
    Detecting proximity of devices based on transmission of inaudible sound signatures in the speech band 有权
    基于语音频段中听不到声音签名的传输来检测设备的接近度

    公开(公告)号：US09591148B2

    公开(公告)日：2017-03-07

    申请号：US14680354

    申请日：2015-04-07

    Applicant: Cisco Technology, Inc.

    Inventor： Michael P. Dimitroff ,  Michael A. Ramalho

    IPC: H04M19/04 ,  G01S3/80

    CPC classification number: H04M19/041 ,  G01S3/80

    Abstract: A communication device detects sound with a microphone to produce a sound signal representative of the sound and searches the sound signal for unique inaudible sound signatures associated with a group identifier. Each sound signature identifies a respective communication device. Each sound signature is in an audible frequency band but masked to be imperceptible. If any of the sound signatures are determined to be present in the sound signal, the communication device selects one based on predetermined criteria associated with the group identifier.

    Abstract translation: 通信设备用麦克风检测声音以产生表示声音的声音信号，并且搜索声音信号以获得与组标识符相关联的独特的无声声音签名。 每个声音签名识别相应的通信设备。 每个声音签名处于可听见的频段，但是被掩盖为不可察觉的。 如果声音信号中的任何一个被确定为存在于声音信号中，则通信设备基于与组标识符相关联的预定标准来选择一个。

    SETTING DELAY PRECEDENCE ON QUEUES BEFORE A BOTTLENECK LINK BASED ON FLOW CHARACTERISTICS
    33.
    发明申请
    SETTING DELAY PRECEDENCE ON QUEUES BEFORE A BOTTLENECK LINK BASED ON FLOW CHARACTERISTICS 有权
    基于流量特征的BOTTLENECK链接之前设置队列的延迟先验

    公开(公告)号：US20160308769A1

    公开(公告)日：2016-10-20

    申请号：US14686575

    申请日：2015-04-14

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： William C. VerSteeg ,  Michael A. Ramalho

    IPC: H04L12/801 ,  H04L12/873 ,  H04L12/927 ,  H04L12/26

    CPC classification number: H04L47/12 ,  H04L43/0852 ,  H04L43/0894 ,  H04L47/28 ,  H04L47/52 ,  H04L47/522 ,  H04L47/56 ,  H04L47/801

    Abstract: Embodiments include detecting an increase in delay of a flow assigned to a first queue of a network device, where the increase is sufficient to cause the flow rate of the flow to decrease if the flow is delay-sensitive. Embodiments further include determining whether an amount of bandwidth consumed by the flow decreases sufficiently after the increase is detected, and assigning the flow to a second queue based, at least in part, on determining the amount of bandwidth consumed by the flow does not decrease sufficiently. Specific embodiments include evaluating a series of two or more bandwidth measurements of the flow according to a bandwidth reduction measure to determine whether the amount of bandwidth consumed by the flow decreases by sufficiently. More specific embodiments include the first queue being configured to receive delay-sensitive flows and the second queue being configured to receive delay-insensitive nice flows.

    Abstract translation: 实施例包括检测分配给网络设备的第一队列的流量的延迟的增加，其中如果流是延迟敏感的，则增加足以导致流量的流量降低。 实施例还包括：在检测到增加之后，确定流量消耗量是否足够减少，并且至少部分地基于确定流量消耗的带宽量而将流量分配给第二队列不会足够地减少 。 具体实施例包括根据带宽减小度量来评估流的一系列两个或多个带宽测量值，以确定流量消耗量是否足够减少。 更具体的实施例包括：第一队列被配置为接收延迟敏感流，并且第二队列被配置为接收延迟不敏感的良好流。

    Endpoint proximity pairing using acoustic spread spectrum token exchange and ranging information
    37.
    再颁专利
    Endpoint proximity pairing using acoustic spread spectrum token exchange and ranging information 有权

    公开(公告)号：USRE49288E1

    公开(公告)日：2022-11-08

    申请号：US17104845

    申请日：2020-11-25

    Applicant: Cisco Technology, Inc.

    Inventor： Michael A. Ramalho ,  Mihailo Zilovic

    IPC: H04B1/709 ,  H04R1/34 ,  H04N21/422 ,  H04H20/30 ,  H04B1/707 ,  H04J13/10 ,  H04R3/00 ,  H04S7/00

    Abstract: A first endpoint generates an acoustic spread spectrum signal including a pilot sequence and a data sequence representing a token synchronized to the pilot sequence, transmits the acoustic spread spectrum signal, and records a transmit time at which the acoustic spread spectrum signal is transmitted. A receive time at which a second endpoint received the acoustic spread spectrum signal transmitted by the first endpoint is received from the second endpoint along with an indication of a second token as recovered from the received acoustic spread spectrum signal by the second endpoint. A separation distance between the first endpoint and the second endpoint is computed based on a time difference between the transmit time and the receive time. The first endpoint is paired with the second endpoint when the token matches the second token and the computed distance is less than a threshold distance.

    Spread spectrum acoustic communication techniques
    39.
    发明授权
    Spread spectrum acoustic communication techniques 有权

    公开(公告)号：US10530417B2

    公开(公告)日：2020-01-07

    申请号：US15926720

    申请日：2018-03-20

    Applicant: Cisco Technology, Inc.

    Inventor： Michael A. Ramalho ,  Mihailo Zilovic ,  David A. Benham

    IPC: G10L19/02 ,  H04B1/69 ,  G10L19/16 ,  G10L19/022 ,  H04B1/66

    Abstract: In a transmit method, a set of data eigenvectors that are based on a Prometheus Orthonormal Set (PONS) code construction and orthogonal to each other are stored, wherein the data eigenvectors are mapped to unique multi-bit words. A pilot sequence representing a pilot eigenvector that is based on the PONS code construction and orthogonal to each of the data eigenvectors is generated. Input data are grouped into multi-bit words and data eigenvectors among the data eigenvectors are selected based on the multi-bit words. A spread data sequence including the selected data eigenvectors and that is synchronized to the pilot sequence is generated. An acoustic signal including the synchronized pilot sequence and the spread data sequence is generated. The acoustic signal is transmitted.

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