专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20210075523A1 Determining a Propagation Condition of a Wireless Channel 有权
公开(公告)号：US20210075523A1
公开(公告)日：2021-03-11
申请号：US16564984
申请日：2019-09-09
申请人： Cisco Technology, Inc.
发明人： Huaiyi Wang , Zhigang Gao
IPC分类号： H04B17/12 , H04L5/00 , H04W64/00
摘要： In some embodiments, a method obtains raw data from one or more packets received over a wireless channel via an antenna. The raw data comprises raw amplitude values and raw phase values. Each raw amplitude value and raw phase value corresponds to a respective OFDM symbol and subcarrier of a respective packet. The method further comprises processing the raw data according to an interference mitigation process and using the resulting calibrated amplitude values and calibrated phase values to determine weighted phase values. Each weighted phase value corresponds to a respective subcarrier. The method determines a phase variance for the antenna based on comparing the plurality of weighted phase values across the plurality of subcarriers. The method determines whether the wireless channel experiences line-of-sight propagation or non-line-of-sight propagation based at least in part on the phase variance.

2. 发明申请

US20150131593A1 High Density Deployment Using Transmit or Transmit-Receive Interference Suppression with Selective Channel Dimension Reduction/Attenuation and Other Parameters 审中-公开
标题翻译：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
申请人： Cisco Technology, Inc
发明人： Paul J. Stager , Matthew A. Silverman , Zhigang Gao , John Blosco , Raghuram Rangarajan
IPC分类号： H04W72/08 , H04L5/00 , H04W72/04
CPC分类号： H04W72/082 , H04L5/0073 , H04W24/02 , H04W72/0426 , H04W72/046 , H04W84/12 , H04W88/08
摘要： 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.
摘要翻译：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。

3. 发明授权

US11368236B2 Detection and decoding of wireless synchronization signals 有权
公开(公告)号：US11368236B2
公开(公告)日：2022-06-21
申请号：US16562598
申请日：2019-09-06
申请人： Cisco Technology Inc.
发明人： Huaiyi Wang , Matthew Aaron Silverman , Zhigang Gao , Evgeny Yankevich
IPC分类号： H04W48/16 , H04J11/00 , H04L5/00 , H04L25/03 , H04W56/00
摘要： A wireless node in a wireless communication network. The wireless node includes one or more interfaces configured to receive wireless transmissions, a memory comprising instructions, and a hardware processor. The wireless node samples a received wireless transmission into a plurality of time-based subdivisions for each subdivision of the wireless transmission the wireless node determines a cross-correlation between the subdivision and a local syncword. The local syncword is constructed to correlate to any primary synchronization signal, PSS, of a plurality of PSSs defined for synchronization in the wireless network. The wireless node, based on the cross-correlation, determines whether one PSS of the plurality of PSSs is present in the subdivision of the wireless transmission.

4. 发明授权

US10794983B1 Enhancing the accuracy of angle-of-arrival device locating through machine learning 有权
公开(公告)号：US10794983B1
公开(公告)日：2020-10-06
申请号：US16521860
申请日：2019-07-25
申请人： Cisco Technology, Inc.
发明人： Mukul Chandail , Khashayar Mirfakhraei , Matthew Aaron Silverman , Xu Zhang , Zhigang Gao , Paul Jeffrey Stager
IPC分类号： H04W24/02 , G01S3/32 , G01S11/04 , G01S11/06 , H04W4/029 , H04W64/00 , G06N20/00 , G01S5/02
摘要： In one embodiment, a device obtains a machine learning model indicative of how to focus on particular location information from a plurality of radio frequency (RF) elements to provide an accurate location estimate of a wireless client based at least in part on angle-of-arrival information of the wireless client. When the device then obtains location information regarding the wireless client from the plurality of RF elements, it may apply the machine learning model to the location information regarding the wireless client to focus on particular location information of the location information from the plurality of RF elements. The device may then estimate a physical location of the wireless client based on focusing on the particular location information during a locationing computation.

5. 发明授权

US11057121B2 Determining a propagation condition of a wireless channel 有权
公开(公告)号：US11057121B2
公开(公告)日：2021-07-06
申请号：US16564984
申请日：2019-09-09
申请人： Cisco Technology, Inc.
发明人： Huaiyi Wang , Zhigang Gao
IPC分类号： H04B17/12 , H04W64/00 , H04L5/00 , H04W24/02 , H04B17/391
摘要： In some embodiments, a method obtains raw data from one or more packets received over a wireless channel via an antenna. The raw data comprises raw amplitude values and raw phase values. Each raw amplitude value and raw phase value corresponds to a respective OFDM symbol and subcarrier of a respective packet. The method further comprises processing the raw data according to an interference mitigation process and using the resulting calibrated amplitude values and calibrated phase values to determine weighted phase values. Each weighted phase value corresponds to a respective subcarrier. The method determines a phase variance for the antenna based on comparing the plurality of weighted phase values across the plurality of subcarriers. The method determines whether the wireless channel experiences line-of-sight propagation or non-line-of-sight propagation based at least in part on the phase variance.

6. 发明授权

US10362538B2 WUR packets generation with legacy WiFi transmitter 有权
公开(公告)号：US10362538B2
公开(公告)日：2019-07-23
申请号：US15663467
申请日：2017-07-28
申请人： Cisco Technology, Inc.
发明人： Zhigang Gao , Paul J. Stager , Fred J. Anderson
IPC分类号： H04W52/02 , H04L27/26 , H04W72/04 , H04W16/14 , H04L5/00 , H04W76/28
摘要： Techniques are disclosed for generating 802.11 packets that simulate an 802.11ba Wake-Up Radio (WUR) packet by wireless access points (APs) that implement pre-802.11ba standards. According to one embodiment disclosed herein, a predefined bit stream including a plurality of data bits is evaluated. A data bit of the plurality is mapped to one of a plurality of subcarriers. A symbol is encoded in a data payload of a network packet based on the mapping of the data bit to the subcarrier. The symbol simulates an on-off key (OOK)-modulated symbol in a WUR sequence. The network packet is transmitted to a client device.

7. 发明授权

US09332557B2 High density deployment using transmit or transmit-receive interference suppression with selective channel dimension reduction/attenuation and other parameters 有权
标题翻译：使用发射或发射接收干扰抑制的高密度部署，具有选择性的信道尺寸减小/衰减和其他参数
公开(公告)号：US09332557B2
公开(公告)日：2016-05-03
申请号：US14600300
申请日：2015-01-20
申请人： Cisco Technology, Inc.
发明人： Paul J. Stager , Matthew A. Silverman , Zhigang Gao , John Blosco , Raghuram Rangarajan
IPC分类号： H04W4/00 , H04W72/08 , H04W24/02 , H04L5/00 , H04W72/04 , H04W84/12 , H04W88/08
CPC分类号： H04W72/082 , H04L5/0073 , H04W24/02 , H04W72/0426 , H04W72/046 , H04W84/12 , H04W88/08
摘要： 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.
摘要翻译：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。

8. 发明申请

US20150085958A1 DC Correction for Accurate Detection of Pulses 有权
标题翻译：直流校正用于精确检测脉冲
公开(公告)号：US20150085958A1
公开(公告)日：2015-03-26
申请号：US14037807
申请日：2013-09-26
申请人： Cisco Technology, Inc.
发明人： Zhigang Gao , Raghuram Rangarajan , David Kloper
IPC分类号： H04L25/06
CPC分类号： H04L25/063
摘要： Techniques are presented herein for distinguishing between the DC component of a real signal and DC energy of a received signal due to the radio receiver circuitry. Samples are obtained of a received signal derived from output of a receiver of a communication device. A mean of the samples is computed over a sample window comprising a predetermined number of samples. First and second thresholds are provided, the first threshold being greater than the second threshold. An absolute value of the mean is compared with respect to the first threshold and the second threshold as samples are obtained in the sample window. A selection is made between the first threshold and the second threshold for purposes of comparison with the absolute value of the mean to determine whether energy at DC is a true/real DC component of the received signal or is due to circuitry of the receiver.
摘要翻译：这里给出了用于区分由无线电接收器电路引起的实际信号的DC分量和接收信号的DC能量之间的技术。获得从通信设备的接收机的输出得到的接收信号的样本。在包含预定数量的样本的样本窗口上计算样本的平均值。提供第一和第二阈值，第一阈值大于第二阈值。将平均值的绝对值相对于第一阈值和第二阈值进行比较，因为样本窗口中获取样本。在第一阈值和第二阈值之间进行选择，以便与平均值的绝对值进行比较，以确定DC处的能量是否是接收信号的真实/真实DC分量，或者是由于接收机的电路。

9. 发明授权

US08976761B2 High density deployment using transmit or transmit-receive interference suppression with selective channel dimension reduction/attenuation and other parameters 有权
标题翻译：使用发射或发射接收干扰抑制的高密度部署，具有选择性的信道尺寸减小/衰减和其他参数
公开(公告)号：US08976761B2
公开(公告)日：2015-03-10
申请号：US13645565
申请日：2012-10-05
申请人： Cisco Technology, Inc.
发明人： Paul J. Stager , Matthew A. Silverman , Zhigang Gao , John Blosco , Raghuram Rangarajan
IPC分类号： H04W4/00
CPC分类号： H04W72/082 , H04L5/0073 , H04W24/02 , H04W72/0426 , H04W72/046 , H04W84/12 , H04W88/08
摘要： In a wireless local are 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.
摘要翻译：在无线本地是网络中，以高密度部署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。

10. 发明授权

US11621798B2 Signaling of preamble puncturing configuration in a non-high throughput RTS/CTS exchange 有权
公开(公告)号：US11621798B2
公开(公告)日：2023-04-04
申请号：US17389824
申请日：2021-07-30
申请人： Cisco Technology, Inc.
发明人： Brian Hart , Zhigang Gao
IPC分类号： H04L1/00
摘要： Preamble puncturing configuration information is encoded in a pad field, and alternatively or additionally, in a Service Field, depending on a transmission bandwidth of a Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU). Some implementations also encode one or more parity bits in the pad field or Service field. The PPDU including the preamble puncturing configuration information encodes, in various embodiments, a request to send frame, a clear to send frame, a power save poll frame, or a contention free end frame.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式