公开(公告)号：US20210349171A1

公开(公告)日：2021-11-11

申请号：US16867410

申请日：2020-05-05

Applicant: Cisco Technology, Inc.

Inventor： Zhigang GAO ,  Matthew A. SILVERMAN ,  Fred J. ANDERSON ,  Huaiyi WANG

IPC: G01S3/14 ,  G01S5/02 ,  G01S3/74

Abstract: Techniques for determining a location of a client device using recursive phase vector subspace estimation are described. One technique includes receiving a plurality of angle-of-arrival (AoA) measurements from a plurality of access points (APs). Each AoA measurement includes a plurality of entries for phase values measured from a signal received from a client device at the plurality of APs. At least one AoA measurement of the plurality of AoA measurements that includes at least one of: (i) one or more entries with missing phase values and (ii) one or more entries with erroneous phase values is identified, based on a recursive phase estimation. The plurality of AoA measurements are updated based on the identified at least one AoA measurement. The location of the client device is determined, based on the updated plurality of AoA measurements.

公开(公告)号：US20190238368A1

公开(公告)日：2019-08-01

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 ,  H04L25/03 ,  H04B7/0413

CPC classification number: H04L25/0246 ,  H04B7/0413 ,  H04L25/0204 ,  H04L25/0244 ,  H04L25/03159 ,  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：US20180310191A1

公开(公告)日：2018-10-25

申请号：US15495503

申请日：2017-04-24

Applicant: Cisco Technology, Inc.

Inventor： David S. KLOPER ,  Matthew A. SILVERMAN ,  Paul J. STAGER

IPC: H04W24/08 ,  H04W48/16

CPC classification number: H04W24/08 ,  H04W48/14 ,  H04W48/20 ,  H04W88/085

Abstract: The present disclosure discloses a central controller controlling multiple radio heads (RHs) in a network. The central controller generates network information for the radio heads based on a probe request transmitted from a network device and received by one or more of the radio heads. The central controller calculates a respective metric value for each of the radio heads based on the network information. The metric value indicates a capability of a radio head to serve the network device. The central controller selects a subset of radio heads from the multiple radio heads to send a probe response to the network device based on the metric values.

公开(公告)号：US20180234141A1

公开(公告)日：2018-08-16

申请号：US15431539

申请日：2017-02-13

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. SILVERMAN ,  Paul J. STAGER ,  David S. KLOPER ,  Brian D. HART ,  Qing ZHAO

IPC: H04B7/0452 ,  H04L12/26

CPC classification number: H04B7/0452 ,  H04L41/0893 ,  H04L43/0894

Abstract: Embodiments herein describe a network device (e.g., an access point) that dynamically arranges multi-user (MU) multiple input multiple output (MIMO) compatible client devices into MU-MIMO groups. That is, the network device uses network metrics and historical data to change the assignment of client devices in the MU-MIMO groups which may improve MU-MIMO efficiency by reducing the amount of power that leaks between the clients devices in the group. In one embodiment, the AP identifies a MU-MIMO group based on a performance evaluation such as evaluating network metric or determining if the group is underutilized. The AP can replace the identified MU-MIMO group with a substitute MU-MIMO group where the substitute MU-MIMO group is selected based on historical data corresponding to the client devices assigned to the substitute MU-MIMO group.

公开(公告)号：US20240298210A1

公开(公告)日：2024-09-05

申请号：US18661409

申请日：2024-05-10

Applicant: Cisco Technology, Inc.

Inventor： Vinay SAINI ,  Robert E. BARTON ,  Jerome HENRY ,  Vishal S. DESAI ,  Matthew A. SILVERMAN ,  John M. SWARTZ ,  Joshua D. SUHR

IPC: H04W28/02 ,  H04L41/147 ,  H04W28/06

CPC classification number: H04W28/0289 ,  H04L41/147 ,  H04W28/0284 ,  H04W28/06

Abstract: Techniques for wireless network management are provided. A first set of characteristics data for a plurality of wireless networks in a common physical space is collected. A use timeline for at least a first wireless network of the plurality of wireless networks is generated based at least in part on the first set of characteristics data, where the first use timeline indicates, for a plurality of time windows, typical expected network characteristics of the first wireless network. A set of radio frequency (RF) parameter modifications is generated based on the first use timeline, and one or more of the plurality of wireless networks are instructed to implement the set of RF parameter modifications.

公开(公告)号：US20240260077A1

公开(公告)日：2024-08-01

申请号：US18295190

申请日：2023-04-03

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. SILVERMAN ,  Brian D. HART ,  Malcolm M. SMITH

IPC: H04W72/566 ,  H04L5/14 ,  H04W28/26

CPC classification number: H04W72/569 ,  H04L5/14 ,  H04W28/26 ,  H04W84/12

Abstract: The present disclosure describes preemption techniques in wireless fidelity (WiFi) networks using full duplex. An apparatus includes a first radio, a second radio, a third radio, a memory, and a processor communicatively coupled to the memory. The processor, while transmitting first messages using the first radio, receives a first frame from a device using the second radio and in response to receiving the first frame, preemptively terminates transmitting the first messages using the first radio. The processor, after terminating transmitting the first messages using the first radio, receives second messages from the device using the third radio.

公开(公告)号：US20240187930A1

公开(公告)日：2024-06-06

申请号：US18060843

申请日：2022-12-01

Applicant: Cisco Technology, Inc.

Inventor： John M. SWARTZ ,  Robert E. BARTON ,  Jerome HENRY ,  Matthew A. SILVERMAN ,  Fred J. ANDERSON

IPC: H04W28/08 ,  H04W48/20 ,  H04W72/12

CPC classification number: H04W28/0942 ,  H04W28/0808 ,  H04W48/20 ,  H04W72/1257

Abstract: A method includes monitoring an upstream traffic demand at a first access point and based at least in part on the upstream traffic demand on the first access point, communicating a message that causes a mobile device to transmit upstream messages to the first access point and to receive downstream messages from a second access point. The first access point is physically closer to the mobile device than the second access point.

公开(公告)号：US20240187115A1

公开(公告)日：2024-06-06

申请号：US18062322

申请日：2022-12-06

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. SILVERMAN ,  Michael B. DELONG ,  Ashish Pasha SHEIKH

IPC: H04B17/345

CPC classification number: H04B17/345

Abstract: Techniques for identifying ultra-wideband interferers in a wireless communication network are disclosed. These techniques include scanning a plurality of channels relating to a wireless communication network and generating one or more spectrograms based on the scanning. The techniques further include identifying an ultra-wideband interferer for the wireless communication network, using the one or more spectrograms, including: analyzing, using the one or more spectrograms, at least one of: (i) power variations relating one or more channels, (ii) power slopes between one or more pairs of channels, (iii) a power level for one or more channels, (iv) carrier leakage, or (v) a period of pulse transmissions.

公开(公告)号：US20240163939A1

公开(公告)日：2024-05-16

申请号：US18193472

申请日：2023-03-30

Applicant: Cisco Technology, Inc.

Inventor： John M. SWARTZ ,  Malcolm M. SMITH ,  Robert E. BARTON ,  Matthew A. SILVERMAN

IPC: H04W76/14 ,  H04W74/04

CPC classification number: H04W76/14 ,  H04W74/04

Abstract: Techniques for improved peer-to-peer grouping in multi-link operations are provided. An indication of radio frequency (RF) capabilities of a peer-to-peer device is transmitted, and the peer-to-peer device receives a group ID assigned by a wireless access point (AP) based on the RF capabilities, where the group ID is associated with a set of links that can be used for peer-to-peer communications between peer-to-peer devices in a first group of peer-to-peer devices. The peer-to-peer device can request that the AP schedule a transmission opportunity for a first peer-to-peer communication using the group ID. In response to receiving a trigger frame comprising the group ID, the first peer-to-peer device performs the first peer-to-peer communication using the transmission opportunity.

公开(公告)号：US20240163703A1

公开(公告)日：2024-05-16

申请号：US18192395

申请日：2023-03-29

Applicant: Cisco Technology, Inc.

Inventor： Matthew A. SILVERMAN ,  John M. SWARTZ ,  Robert E. BARTON ,  Jerome HENRY ,  Malcolm M. SMITH

IPC: H04W24/10 ,  H04B17/336

CPC classification number: H04W24/10 ,  H04B17/336

Abstract: Embodiments herein describe assigning RUs to P2P stations to perform P2P communication. An AP can assign trigger frames to assign RUs to STAs to use when transmitting data to the AP. In one embodiment, the AP polls the P2P STAs associated with it to receive interference data. This data can indicate the affect other peer STAs have on the P2P STAs when transmitting data. Using the interference data, the AP can determine whether another P2P pair or a non-P2P station can be assigned RUs to transmit at the same time, and at what data rates.