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51.发明申请公开(公告)号：US20160157201A1
公开(公告)日：2016-06-02
申请号：US14558205
申请日：2014-12-02
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , Brian D. Hart
IPC: H04W64/00
CPC classification number: H04W64/00 , G01S5/0226 , G01S5/0273 , G01S5/04 , H04W84/12
Abstract: Techniques are presented herein for improving location determination of a wireless device in environments where there can be multipath issues. A wireless device having a plurality of antennas receives a wireless transmission from a target device whose location is to be determined. Channel state information data is generated based on reception of the transmission at the plurality of antenna. The channel state information data is separated or partitioned into subcarrier group specific data for each of a plurality of groups of subcarriers within a bandwidth of the received transmission. Location probability data is computed for each of the plurality of groups of subcarriers from the subcarrier group specific data for respective ones of the plurality of groups of subcarriers. The location probability data for the plurality of groups of subcarriers is combined to produce aggregate location probability data, from which a location of the target device is determined.
Abstract translation: 本文介绍了在可能存在多路径问题的环境中改进无线设备的位置确定的技术。 具有多个天线的无线设备从要确定其位置的目标设备接收无线传输。 基于在多个天线处的发送的接收来生成信道状态信息数据。 信道状态信息数据被分离或分割为在接收的传输的带宽内的多个子载波组中的每一个的子载波组专用数据。 针对多个子载波组中的各个子载波组特定数据，针对多个子载波组中的每一个计算位置概率数据。 组合多个子载波组的位置概率数据以产生聚合位置概率数据，确定目标设备的位置。
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公开(公告)号：US09112555B2
公开(公告)日：2015-08-18
申请号：US13678849
申请日：2012-11-16
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , James C. Nicholson
CPC classification number: H04B7/0426 , H04B7/0602 , H04L5/0023 , H04W52/42
Abstract: Techniques are presented herein to achieve reduced array gain associated with a transmission made from multiple antennas of a wireless communication device. In accordance with one technique, a wireless communication device is provided having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas. Subcarriers of at least one transmit signal to be weighted across the plurality of transmitters are allocated power so that for each subcarrier, only one transmitter is allocated a maximum power.
Abstract translation: 这里呈现技术以实现与由无线通信设备的多个天线制成的传输相关联的减少的阵列增益。 根据一种技术，提供了具有多个发射机的无线通信设备，每个发射机被配置为经由多个天线中的对应的一个发射。 在多个发射机之间要加权的至少一个发射信号的子载波被分配功率，使得对于每个子载波，只有一个发射机被分配最大功率。
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53.发明申请公开(公告)号：US20150133172A1
公开(公告)日：2015-05-14
申请号：US14078824
申请日：2013-11-13
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager
IPC: H04W4/02
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。
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公开(公告)号：US20140140438A1
公开(公告)日：2014-05-22
申请号：US13678849
申请日：2012-11-16
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Matthew A. Silverman , Paul J. Stager , James C. Nicholson
IPC: H04B7/04
CPC classification number: H04B7/0426 , H04B7/0602 , H04L5/0023 , H04W52/42
Abstract: Techniques are presented herein to achieve reduced array gain associated with a transmission made from multiple antennas of a wireless communication device. In accordance with one technique, a wireless communication device is provided having a plurality of transmitters each configured to transmit via a corresponding one of a plurality of antennas. Subcarriers of at least one transmit signal to be weighted across the plurality of transmitters are allocated power so that for each subcarrier, only one transmitter is allocated a maximum power.
Abstract translation: 这里呈现技术以实现与由无线通信设备的多个天线制成的传输相关联的减少的阵列增益。 根据一种技术，提供了具有多个发射机的无线通信设备，每个发射机被配置为经由多个天线中的对应的一个发射。 在多个发射机之间要加权的至少一个发射信号的子载波被分配功率，使得对于每个子载波，只有一个发射机被分配最大功率。
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公开(公告)号：US20250081236A1
公开(公告)日：2025-03-06
申请号：US18458735
申请日：2023-08-30
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Sivadeep Reddy Kalavakuru , Ardalan Alizadeh
IPC: H04W74/08
Abstract: Backscatter Device (BKD) scheduling and, specifically, narrowband BKD excitation for multiple BKD scheduling may be provided. An AP may determine to transmit an excitation transmission to a plurality of BKDs. The AP may determine a trigger frequency for each of the plurality of BKDs, and the AP may transmit an excitation transmission comprising a plurality of excitation signals. Each excitation signal may have a frequency corresponding to one of the trigger frequencies for the plurality of BKDs. The plurality of excitation signals may be ordered for the plurality of BKDs to perform backscattering (i) concurrently; (ii) staggered in a single Transmit Opportunity; or (iii) a combination of (i) and (ii).
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Patent Agency Ranking
公开(公告)号：US12160819B2
公开(公告)日：2024-12-03
申请号：US18329285
申请日：2023-06-05
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Mahesh Daisy , Jerome Henry , Vishal S. Desai
Abstract: Various embodiments herein disclose coordinating frequencies for an access point (AP). A corresponding method comprises evaluating a performance profile for the AP, the performance profile comprising a first part related to a first network generated by a first radio of the AP and a second part related to a second network generated by a second radio of the AP. The method also comprises selecting first channels on which the AP generates the first network based on the performance profile and spectral regrowth profiles for transmission power levels of the first radio. The method additionally comprises selecting second channels on which the AP generates the second network based at least in part on the performance profile and the spectral regrowth profiles. Furthermore, the method comprises enabling communications between a first set of devices on the first channels and enabling communications between a second set of devices on the second channels.
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公开(公告)号：US20240380538A1
公开(公告)日：2024-11-14
申请号：US18459585
申请日：2023-09-01
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Malcolm M. Smith , Indermeet S. Gandhi , Brian D. Hart
IPC: H04L5/00
Abstract: Sounding for Multi-Access Point (AP) coordination and, specifically, hybrid staggered and concurrent sounding for multi-AP coordination may be provided. Performing hybrid staggered and concurrent sounding may include coordinating a plurality of APs to perform a hybrid sounding signal process, including determining a sounding frame transmission time and an order for the plurality of APs to stagger sounding signals, and performing the hybrid sounding signal process. An announcement signal may be sent to clients before performing the hybrid sounding signal process. Additionally, channel information may be received from the clients, and AP operation can be determined based on the channel information.
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公开(公告)号：US20240380459A1
公开(公告)日：2024-11-14
申请号：US18459564
申请日：2023-09-01
Applicant: Cisco Technology, Inc.
Inventor： Ardalan Alizadeh , Navid Reyhanian , Sivadeep R. Kalavakuru , Matthew A. Silverman , Peiman Amini
IPC: H04B7/06 , H04B7/0456
Abstract: Enhancing Multi-Access Point (AP) Coordination (MAPC) null-steering may be provided. Enhancing null-steering may include sending a coordination request for MAPC. A coordination response may be received from one or more APs. A Channel State Information (CSI) request may then be sent. CSI of one or more clients associated with the one or more APs may be received. Next, one or more precoder and decoder matrices may be determined based on the CSI of the one or more clients. The one or more precoder matrices may be sent to the one or more APs, and the one or more decoder matrices may be sent to the one or more clients. A transmission may be sent to a first client using null-steering and interference alignment based on the one or more precoder matrices, wherein the transmitting is synchronized with transmissions by the one or more APs to the one or more clients.
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公开(公告)号：US20240380445A1
公开(公告)日：2024-11-14
申请号：US18457558
申请日：2023-08-29
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Robert E. Barton , Ashish Sheikh
IPC: H04B7/0452 , H04B7/22
Abstract: Staggered Multi-User (MU) uplink in an Ambient Power (AMP) Backscatter Device (BKD) group may be provided. A transmitter AP may determine to receive uplink data from an AMP BKD group and then transmit a session initialization message to a receiver AP instructing the receiver AP to receive the uplink data from the AMP BKD group. The transmitter AP may receive an initialization response from the receiver AP indicating the receiver AP will receive the uplink data. The transmitter may transmit an AMP BKD initialization signal to the AMP BKD group indicating to the AMP BKD group to perform scattering without collisions. The transmitter AP may then transmit an excitation transmission for the AMP BKD group to perform scattering.
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公开(公告)号：US11923937B2
公开(公告)日：2024-03-05
申请号：US17332670
申请日：2021-05-27
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Robert E. Barton , Matthew A. Silverman , Pooya Monajemi
CPC classification number: H04B7/0617 , H04W36/08 , H04W52/30
Abstract: Spurious beamforming in high density environments can be reduced via transmitting a first signal from a first Access Point (AP) to a first endpoint associated with the first AP via a first beamforming arrangement; in response to identifying that the first beamforming arrangement is pollutive to a second endpoint associated with a second AP: deprecating the first beamforming arrangement; and transmitting a second signal from the first AP to the first endpoint via a second beamforming arrangement, different from the first beamforming arrangement.
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