公开(公告)号：US20240284437A1

公开(公告)日：2024-08-22

申请号：US18172019

申请日：2023-02-21

Applicant: Cisco Technology, Inc.

Inventor： Malcolm Muir Smith ,  Brian D. Hart

IPC: H04W72/121 ,  H04W40/24

CPC classification number: H04W72/121 ,  H04W40/246

Abstract: Scaling by using tiered multi-level scheduling may be provided. Connectivity information associated with a plurality of Access Points (APs) may be received by a computing device. A plurality of Connectivity Groups (CGs) may be determined from the plurality of APs based on the connectivity information. Transmissions may be scheduled for the plurality of CGs such that when any of the plurality of CGs sends a transmission, the transmission is substantially unaffected by interference from any others of the plurality of CGs.

公开(公告)号：US11799912B2

公开(公告)日：2023-10-24

申请号：US17301150

申请日：2021-03-26

Applicant: Cisco Technology, Inc.

Inventor： Malcolm M. Smith ,  Jerome Henry ,  Pooya Monajemi ,  Brian D. Hart ,  David S. Kloper

IPC: H04L9/40 ,  H04W12/08

CPC classification number: H04L63/20 ,  H04W12/08

Abstract: A device includes a memory and a hardware processor communicatively coupled to the memory. The hardware processor determines that a computing device communicatively coupled to an access point performed an action with respect to the access point and in response to determining that the action causes a deviation from a multi-user uplink policy of the access point, transmits a disciplinary message to the computing device.

公开(公告)号：US11374704B2

公开(公告)日：2022-06-28

申请号：US16869311

申请日：2020-05-07

Applicant: Cisco Technology, Inc.

Inventor： Huaiyi Wang ,  Brian D. Hart ,  Matthew A. Silverman ,  Zhigang Gao

IPC: H04L1/20 ,  H04L1/00 ,  G16Y40/10

Abstract: Aspects described herein include a method comprising predicting, based on one or more transmission characteristics, error values for a sequence of bit positions used for modulating data within a packet. The method further comprises generating a bitmap that maps one or more payload bits and one or more padding bits of the packet to respective bit positions of the sequence. The one or more padding bits are preferentially mapped to respective bit positions having relatively greater error values. The method further comprises modulating the sequence according to the bitmap.

公开(公告)号：US11172484B2

公开(公告)日：2021-11-09

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/08

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.

公开(公告)号：US10863465B2

公开(公告)日：2020-12-08

申请号：US16388571

申请日：2019-04-18

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.

公开(公告)号：US10568134B2

公开(公告)日：2020-02-18

申请号：US16037480

申请日：2018-07-17

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  David Kloper ,  Pooya Monajemi ,  Matthew A. Silverman

IPC: H04W74/08 ,  H04L5/00 ,  H04W72/04 ,  H04W52/24 ,  H04W52/36 ,  H04L1/00 ,  H04W52/22 ,  H04W52/46

Abstract: A third device stores a receive signal strength of a received response data unit transmitted by a second device after receiving a first data unit transmitted by a first device. The third device obtains a clear channel access parameter included in a header of a second data unit transmitted by the first device to the second device and detects transmission exchanges in each of a plurality of service sets to use as samples of overlapping service set activity. The third device determines a minimum transmit power to be used by the third device to send a transmission to the fourth device based on transmission exchanges between devices in a particular service set. The third device determines whether to send a transmission to the fourth device based on the clear channel access parameter and minimum transmit power.

公开(公告)号：US20200029361A1

公开(公告)日：2020-01-23

申请号：US16037287

申请日：2018-07-17

Applicant: Cisco Technology, Inc.

Inventor： Vishal S. Desai ,  Brian D. Hart ,  David Kloper ,  Andrew Myles

IPC: H04W74/08 ,  H04W72/04 ,  H04W72/08

Abstract: In a wireless local area network (WLAN) that includes one or more wireless access points capable of serving one or more wireless clients, presence of one or more instances of interference from a particular type of interferer is detected on at least one channel in an unlicensed frequency band. In response to detecting the interference, a radio resource management process is biased to continue operation of at least one of the one or more access points, or individual radios of a multi-radio access point, on the channel to make at least some use of the channel for one or more wireless clients.

公开(公告)号：US10104687B2

公开(公告)日：2018-10-16

申请号：US15428370

申请日：2017-02-09

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart

IPC: H04W74/04 ,  H04B17/318 ,  H04W84/12

Abstract: A pair of Clear Channel Assessment (CCA) rules are presented that protect an initiator's transmission at the responder, and the responder's transmission at the initiator, using additional fields transmitted in a preamble (header) of a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) or in a Media Access Control (MAC) header, if unencrypted and robustly modulated. These techniques enable more parallel/simultaneous transmissions between devices that might otherwise interfere with each other, subject to ensuring an adequate Signal-to-Interface and-Noise Ratio (SINR) for the initiator's transmission at the responder and ensuring an adequate SINR for the responder's transmission at the initiator.

公开(公告)号：US20180176044A1

公开(公告)日：2018-06-21

申请号：US15381630

申请日：2016-12-16

Applicant: Cisco Technology, Inc.

Inventor： Mithat C. Dogan ,  Brian D. Hart ,  Jiunming Huang ,  Matthew Silverman

IPC: H04L25/02 ,  H04B7/0452 ,  H04B7/06

CPC classification number: H04L25/0246 ,  H04B7/0413 ,  H04L25/0204 ,  H04L25/0244 ,  H04L25/03159

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：US09991972B1

公开(公告)日：2018-06-05

申请号：US15497969

申请日：2017-04-26

Applicant: Cisco Technology, Inc.

Inventor： Mithat C. Dogan ,  Matthew A. Silverman ,  Paul J. Stager ,  Brian D. Hart ,  Jiunming Huang

IPC: H04B15/00 ,  H04B17/12 ,  H04L25/02 ,  H04B7/06 ,  H04B7/0413

CPC classification number: H04B17/12 ,  H04B7/022 ,  H04B7/0617 ,  H04L25/0202

Abstract: Embodiments herein describe calibrating a plurality of radio heads having a plurality of wireless antennas. In one embodiment, the plurality of radio heads communicate a calibration signal in a round robin fashion such that each of the radio heads communicates a respective calibration signal to the remaining radio heads. In one embodiment, at least one of the radio heads is isolated from the remaining radio heads. The received calibration signals are then used to calibrate the radio heads. In one embodiment, a controller coupled with the plurality of radio heads calibrates the radio heads. The calibrated radio heads then communicate to one or more client devices.