公开(公告)号：US20240380646A1

公开(公告)日：2024-11-14

申请号：US18499862

申请日：2023-11-01

Applicant: Cisco Technology, Inc.

Inventor： Robert E. Barton ,  Matthew A. Silverman ,  Jerome Henry ,  Pascal Thubert

IPC: H04L27/26

Abstract: Granular guard interval tuning may be provided. A delay profile for a plurality of sub-bands in a serving channel may be created. Then delay spread information from at least one calibration helper device for the plurality of sub-bands in the serving channel may be received. Next, a delay spread matrix based on the delay profile, the delay spread information, and a location of the calibration helper devices may be created. The delay spread matrix may then be used to determine optimal Guard Intervals (GIs).

公开(公告)号：US11864104B2

公开(公告)日：2024-01-02

申请号：US17447175

申请日：2021-09-08

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. Silverman ,  Mahesh Daisy ,  Jerome Henry ,  Vishal S. Desai

IPC: H04W48/20 ,  H04W76/15 ,  H04W84/12

CPC classification number: H04W48/20 ,  H04W76/15 ,  H04W84/12

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.

公开(公告)号：US11832174B2

公开(公告)日：2023-11-28

申请号：US16752219

申请日：2020-01-24

Applicant: Cisco Technology, Inc.

Inventor： Vishal S. Desai ,  Jerome Henry ,  Matthew A. Silverman ,  Robert E. Barton

IPC: H04W48/20 ,  H04W24/02 ,  H04W28/02 ,  H04W48/16 ,  H04W48/12 ,  H04W74/00 ,  H04W84/12 ,  H04W74/08

CPC classification number: H04W48/20 ,  H04W24/02 ,  H04W28/0268 ,  H04W48/16

Abstract: Embodiments herein describe techniques for conveying performance parameters to client devices using BSS coloring. IEEE 802.11ax introduced BSS color to help with interference between BSSs operating in the same channel or partially overlapping channels in a frequency band. The BSS colors are typically assigned at random. However, in the embodiments herein, the BSS colors can still be relied to help with co-channel interference as intended by IEEE 802.11ax but also can convey performance parameters to the client devices. The AP can leverage the BSS color to convey (or encode) a performance parameter such as radio frequency (RF) conditions, quality of service (QoS) conditions, or a policy of the network in response to expected (or future) conditions to receiving client devices.

公开(公告)号：US11695380B2

公开(公告)日：2023-07-04

申请号：US17654717

申请日：2022-03-14

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. Silverman ,  Evgeny Yankevich ,  John M. Swartz

IPC: H03G3/30 ,  H03G3/00 ,  H04W28/02 ,  H04B1/10

CPC classification number: H03G3/3042 ,  H03G3/001 ,  H04B1/109 ,  H04W28/0268

Abstract: Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.

公开(公告)号：US11622355B2

公开(公告)日：2023-04-04

申请号：US17301176

申请日：2021-03-29

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Gautam D. Bhanage ,  Khashayar Mirfakhraei ,  Matthew A. Silverman ,  Sivadeep R. Kalavakuru

IPC: H04W84/12 ,  H04W72/044 ,  H04W72/0453

Abstract: A method includes instructing, by a WiFi access node, a first device to communicate using an uplink frequency band with a first uplink power. The method also includes instructing, by the WiFi access node, a second device to communicate using the uplink frequency band with a second uplink power different from the first uplink power.

公开(公告)号：US20210349170A1

公开(公告)日：2021-11-11

申请号：US16871967

申请日：2020-05-11

Applicant: Cisco Technology, Inc.

Inventor： Danielle N. Bane ,  Jonathan M. Cyphert ,  Sivadeep R. Kalavakuru ,  Ashish Pasha Sheikh ,  Matthew A. Silverman

IPC: G01S3/04 ,  H01Q7/00 ,  H01Q9/30 ,  H01Q5/307 ,  H01Q21/20

Abstract: The present disclosure provides a dual mode antenna, comprising: a first conductive piece; and a second conductive piece, configured to electromagnetically couple with the first conductive piece through a dielectric at a second frequency to operate as a loop antenna with the first conductive piece and configured to operate independently of the first conductive piece at a first frequency to operate as a monopole antenna. The dual mode antenna can be included in an antenna array as one of a plurality of dual mode antennas coupled to a routing substrate or a reference dual mode antenna coupled to the routing substrate along with a plurality of single mode antennas coupled to the routing substrate; wherein each antenna of the plurality of dual mode antennas, the reference dual mode antenna, and the plurality of single mode antennas is arranged evenly relative to a first neighboring antenna and a second neighboring antenna.

公开(公告)号：US11089503B2

公开(公告)日：2021-08-10

申请号：US16737824

申请日：2020-01-08

Applicant: Cisco Technology, Inc.

Inventor： John M. Swartz ,  Joshua D. Suhr ,  Matthew A. Silverman ,  Vishal S. Desai

IPC: H04L12/26 ,  H04W24/02 ,  H04W28/02 ,  H04W48/12 ,  H04W12/06 ,  H04W24/08 ,  H04W84/18

Abstract: Techniques for automated network adjustment are provided. A first data rate currently supported by a first access point is determined, and a second data rate is identified to be evaluated. A first sensor device of a plurality of sensor devices is identified, where a signal strength between the first sensor device and the first access point exceeds a predefined threshold. A first packet error rate is determined for communications between the first sensor device and the first access point using the first data rate, and a second packet error rate is determined for communications between the first sensor device and the first access point using the second data rate. Upon determining that the second packet error rate is lower than the first packet error rate, the first access point is automatically reconfigured to use the second data rate.

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.

公开(公告)号：US20200314641A1

公开(公告)日：2020-10-01

申请号：US16363268

申请日：2019-03-25

Applicant: Cisco Technology, Inc.

Inventor： Claudius Samuel Tewari ,  Jagdish Girimaji ,  Matthew A. Silverman ,  Jie C. Jiang ,  Hugo M. Latapie ,  Enzo Fenoglio

IPC: H04W12/00 ,  G06N3/08 ,  G06N3/04 ,  G06F16/22

Abstract: In one embodiment, a device obtains radio frequency (RF) characteristic data for a wireless client. The device inputs the RF characteristic data for the wireless client to a deep learning-based encoder. The device learns a latent space representation of the RF characteristic data from the encoder. The device uses the learned latent space representation as a unique signature to identify the wireless client in a wireless network.

公开(公告)号：US10677885B2

公开(公告)日：2020-06-09

申请号：US16390566

申请日：2019-04-22

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. Silverman ,  Oscar Bejarano Chavez ,  Paul J. Stager ,  David Kloper

IPC: G01S5/06 ,  H04L25/02 ,  H04B7/08

Abstract: Techniques are presented herein for computing angle-of-arrival estimates while switching antenna states during a packet unit for the general Orthogonal Frequency Division Multiple Access (OFMDA) case (including a single user). A wireless device computes channel estimates throughout the entire frame and not only during the training symbols. Consequently, the wireless device computes channel estimates for all antennas in its array within a single frame instead of having to wait for multiple frames.