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公开(公告)号：US20240023179A1
公开(公告)日：2024-01-18
申请号：US17812739
申请日：2022-07-15
Applicant: Cisco Technology, Inc.
Inventor： Pooya Monajemi , Ardalan Alizadeh , Matthew Aaron Silverman , Brian D. Hart , Vishal Satyendra Desai , Santosh Babaji Kulkarni , Young IL Choi
IPC: H04W76/15
Abstract: An arrangement of three radios maybe provided. The three radios define first and second outer data links and a middle data link. Access to the arrangement of three radios can be biased to the middle data link in one direction upon a data transmission through the first and second outer data links being dominate in an opposite direction. Data transmission with enhanced multi-link single radio (eMLSR) client devices can be prioritized lower than data transmission with simultaneous transmit and receive radio (STR) client devices and non-simultaneous transmit and receive radio (NSTR) client devices. A radio can be configured for data transmission with a client device. The range of the radio is limited when the data traffic through the radio exceeds a determined number of bytes of data in a determined amount of time.
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公开(公告)号：US10979251B2
公开(公告)日：2021-04-13
申请号：US16378411
申请日：2019-04-08
Applicant: Cisco Technology, Inc.
Inventor： Mithat C. Dogan , Brian D. Hart , Jiunming Huang , Matthew A. Silverman
IPC: H04L25/02 , H04B7/0413 , H04L25/03 , H04W84/12 , H04W88/12
Abstract: The embodiments herein use a factorization based technique for determining filter coefficients for a subset of the subcarriers in a wireless frequency band. Once the filter coefficients for the subset of the subcarriers are calculated, the network device uses these filter coefficients to identify the filter coefficients in a neighboring subcarrier. To do so, the network device uses pseudo-inverse iteration to convert the already calculated filter coefficients into filter coefficients for a neighboring subcarrier. The network device can repeat this process for the next set of neighboring subcarriers until all the filter coefficients have been calculated.
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公开(公告)号：US10952156B2
公开(公告)日：2021-03-16
申请号：US16421175
申请日：2019-05-23
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , David Kloper , Pooya Monajemi , Vishal S. Dasai
Abstract: Augmenting a neighbor report with uplink Received Signal Strength Indicators (RSSIs) may be provided. First, a conducted transmit power value of a client device may be determined. A plurality of RSSI uplink values respectively corresponding to a plurality of Access Points (APs) may then be determined. Next, a plurality of RSSI downlink values respectively corresponding to the plurality of APs may be determined based on the respective plurality of RSSI uplink values, a respective plurality of conducted transmit power values corresponding to the plurality of APs, and the conducted transmit power value of the client device. A plurality of quality metrics respectively corresponding to the plurality of APs may then be determined based on the determined plurality of RSSI uplink values and the determined plurality of RSSI downlink values. Then, a neighbor report may be optimized based on the plurality of quality metrics.
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4.发明申请公开(公告)号：US20200015220A1
公开(公告)日：2020-01-09
申请号：US16504972
申请日：2019-07-08
Applicant: Cisco Technology, Inc.
Inventor： Benjamin Jacob Cizdziel , Brian D. Hart , Pooya Monajemi , David Kloper
Abstract: Bypassing radar in wide Dynamic Frequency Selection (DFS) channels utilizing puncturing may be provided. A first client device may be classified as eligible for puncturing and a second client device may be classified as not eligible for puncturing. Next, it may be determined that a subchannel in a bandwidth range should not be used. Then, in response to determining that the subchannel in the bandwidth range should not be used, the first client device may be steered to a first subset of the bandwidth range and the second client device may be steered to a second subset of the bandwidth range. The second subset of the bandwidth range may be smaller than the first subset of the bandwidth range.
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5.发明申请公开(公告)号：US20190245593A1
公开(公告)日：2019-08-08
申请号：US16383915
申请日：2019-04-15
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , Paul J. Stager , David Kloper , Jie Cheng Jiang
IPC: H04B7/0452 , H04B7/024
CPC classification number: H04B7/0452 , H04B7/024 , H04W84/12 , H04W88/08
Abstract: A wireless access point device wirelessly communicates with a plurality of wireless client devices. The wireless access point includes a central processor subsystem and a plurality of transceiver devices each including a plurality of antennas, and a plurality of radio transceivers, each of the plurality of transceiver devices configured for deployment throughout a coverage area, each transceiver device being connected to the central processor subsystem via a respective cable. The central processor subsystem distributes in-phase and quadrature baseband samples across the plurality of transceiver devices associated with traffic to be transmitted and received via the plurality of transceiver devices in one or more frequency bands so as to synthesize a wideband multiple-input multiple-output transmission channel and a wideband multiple-input multiple-output reception channel. The access point transmit and receive functions are “split” or partitioned across the plurality of transceivers devices.
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Patent Agency Ranking
公开(公告)号：US20190158157A1
公开(公告)日：2019-05-23
申请号：US15819254
申请日：2017-11-21
Applicant: Cisco Technology, Inc.
Inventor： Xiaoli Ma , Hongyi Fu , Brian D. Hart , Matthew A. Silverman
IPC: H04B7/0452 , H04L25/02 , H04L27/26
Abstract: A wireless device, such as an wireless access point, receives signals detected by a plurality of antennas of a wireless device to produce a plurality of antenna-specific receive signals potentially representing a wireless transmission received from each of one or a plurality of devices. A signal processing component of the wireless device, such as a modem, performs several operations on the antenna-specific receive signals, including building a first space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a first device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the first device, and building a second space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a second device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the second device.
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7.发明授权公开(公告)号：US10285148B2
公开(公告)日：2019-05-07
申请号：US15582024
申请日：2017-04-28
Applicant: Cisco Technology, Inc.
Inventor： Paul J. Stager , David S. Kloper , Brian D. Hart , Matthew A. Silverman
IPC: H04W56/00
Abstract: Techniques are disclosed to synchronize wireless signal transmission by endpoints controlled by a central controller. For example, an example method of wireless communication includes receiving, at a first device, over a wired medium between the first device and a second device, a plurality of packets from the second device. Each of the plurality of packets comprises data representative of a portion of a signal corresponding to a wireless medium. The method further includes receiving, at the first device, from the second device over the wired medium a synchronization signal based on a common master clock at the second device. The method further includes synchronizing, at the first device, a local clock of the first device to the common master clock based on the synchronization signal. The method further includes reconstructing the signal corresponding to the wireless medium based on the plurality of packets and the synchronized local clock.
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公开(公告)号：US10277384B2
公开(公告)日：2019-04-30
申请号：US15479077
申请日：2017-04-04
Applicant: Cisco Technology, Inc.
Inventor： David S. Kloper , Brian D. Hart , Paul J. Stager
Abstract: Embodiments herein describe using an intermediate distribution frame (IDF) which is connected between a central controller and a plurality radio heads which each include at least one antenna for wireless communication with a user device. Instead of running separate cables to each of the radio heads, a single cable can be used to connect the IDF to the central controller and then separate cables can be used to connect the IDF to the radio heads. If the IDF is disposed near the radio heads, the amount of cables can be reduced. Moreover, the IDF may recover a clock signal used by the central controller and forward that clock to the plurality of radio head in order to synchronize the radio heads to the central controller.
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公开(公告)号：US10277293B1
公开(公告)日：2019-04-30
申请号：US15819254
申请日：2017-11-21
Applicant: Cisco Technology, Inc.
Inventor： Xiaoli Ma , Hongyi Fu , Brian D. Hart , Matthew A. Silverman
IPC: H04B7/0452 , H04L25/02 , H04L27/26
Abstract: A wireless device, such as an wireless access point, receives signals detected by a plurality of antennas of a wireless device to produce a plurality of antenna-specific receive signals potentially representing a wireless transmission received from each of one or a plurality of devices. A signal processing component of the wireless device, such as a modem, performs several operations on the antenna-specific receive signals, including building a first space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a first device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the first device, and building a second space-time equalizer to be applied to the plurality of antenna-specific receive signals to recover a transmission from a second device by both equalizing channel effects and canceling out effects associated with transmissions from devices other than the second device.
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公开(公告)号：US10250415B2
公开(公告)日：2019-04-02
申请号：US15447980
申请日：2017-03-02
Applicant: Cisco Technology, Inc.
Inventor： Brian D. Hart , David S. Kloper , Jiunming Huang , Glendon L. Akins, III
Abstract: Techniques are disclosed to reduce latency of processing for access points using a central controller. For example, an example method of wireless communication includes receiving, at an access point, a signal wirelessly. The method further includes filtering the signal using a first passband filter having a first bandwidth to generate a first filtered signal. The method further includes filtering the signal using a second passband filter having a second bandwidth to generate a second filtered signal, wherein the first bandwidth is less than the second bandwidth. The method further includes determining whether the signal includes a packet based on the first filtered signal and generating a control signal indicative of the determination. The method further includes transmitting the control signal and the second filtered signal to a central controller.
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