公开(公告)号：US20220225217A1

公开(公告)日：2022-07-14

申请号：US17145252

申请日：2021-01-08

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Ardalan Alizadeh ,  Khashayar Mirfakhraei ,  Gautam D. Bhanage

IPC: H04W48/16 ,  H04W48/20 ,  H04W72/04

Abstract: Optimal determination of a Wireless Local Area Network (WLAN) sounding method and system may be provided. An Access Point (AP) selects a subchannel for the partial sounding. The AP then sounds the selected subchannel. A client station responds with Channel State Information (CSI). The AP can receive the CSI, from the client station, in response to the sounding. Based on the CSI from the selected subchannel, the AP extrapolates the CSI to determine predicted CSI for a wider bandwidth channel.

公开(公告)号：US20220070612A1

公开(公告)日：2022-03-03

申请号：US17125144

申请日：2020-12-17

Applicant: Cisco Technology, Inc.

Inventor： Jerome Henry ,  Robert Edgar Barton ,  Matthew Aaron Silverman

IPC: H04W4/02 ,  H04B1/7163 ,  H04W74/08

Abstract: Presented herein are techniques for assigning Ultra-Wideband (UWB) anchors for client ranging. A control device can monitor UWB ranging between a mobile device and a primary anchor. In response to determining that a signal strength between the mobile device and the primary anchor is below a threshold, the control device can identify anchors for which the mobile device has had a signal strength above the threshold during a period of time, and select one of the anchors as a new primary anchor for the mobile device. For example, the control device can select the new primary anchor based on a relative collision tolerance mapping for the new primary anchor and at least one other anchor within a UWB range of the new primary anchor. The control device can send a command causing UWB ranging to be performed between the mobile device and the new primary anchor.

公开(公告)号：US11184265B2

公开(公告)日：2021-11-23

申请号：US16655065

申请日：2019-10-16

Applicant: Cisco Technology, Inc.

Inventor： Ardalan Alizadeh ,  Gautam Dilip Bhanage ,  Benjamin Jacob Cizdziel ,  Khashayar Mirfakhraei ,  Matthew Aaron Silverman

IPC: H04L12/26 ,  H04W72/08 ,  H04W52/24 ,  H04L29/14 ,  H04W84/12

Abstract: Inter-protocol interference reduction for hidden nodes may be provided. A first service end point may determine that an inter-protocol interference is present on a channel. Next, an initial packet failure count value on the channel may be determined. A transmit (Tx) power for selected packets may then be increased until a subsequent packet failure count value on the channel is less than the initial packet failure count value.

公开(公告)号：US11153760B2

公开(公告)日：2021-10-19

申请号：US16293218

申请日：2019-03-05

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Daniel Joseph Lyons ,  Pooya Monajemi ,  John Matthew Swartz

IPC: H04W16/10 ,  H04W74/08 ,  H04L1/00 ,  H04W72/04 ,  H04B17/336 ,  H04W72/08 ,  H04W80/08 ,  H04W72/12 ,  H04W16/14 ,  H04B7/0452 ,  H04W84/12

Abstract: In one illustrative example, a device configured for use in a wireless local area network (WLAN) may cause a spatial reuse (SR) adjustment to be performed based on data received from a multi-user receiver procedure for the blind detection and demodulation of colliding packets from multiple stations. This procedure may be performed by one or more access points (APs) and/or distributed sensor nodes, each having such a multi-user receiver. The procedure may involve receiving and decoding, over a channel, a first spatial stream from a first device of a first base service set (BSS) color; simultaneously receiving and decoding, over the channel, a second spatial stream from a second device of a second BSS color (i.e. an overlapping BSS or “OBSS”); and calculating a signal-to-interference ratio (SIR) based on signal levels associated with the streams. The SR adjustment may involve adjusting an OBSS Packet Detect (PD) (OBSS-PD) threshold.

公开(公告)号：US11143738B1

公开(公告)日：2021-10-12

申请号：US16989204

申请日：2020-08-10

Applicant: Cisco Technology, Inc.

Inventor： Sivadeep R. Kalavakuru ,  Matthew Aaron Silverman ,  Xiaohua Fang ,  Rahul Dasgupta ,  Huy Phuong Tran ,  Abhishek Bhattacharyya

IPC: G01S5/10 ,  H04W4/029 ,  H04B17/318

Abstract: An access point includes first and second radios that operate in accordance with first and second wireless protocols, respectively. The access point performs a method including receiving a first protocol packet of the first wireless protocol and a second protocol packet of the second wireless protocol transmitted by a wireless device over a communication channel, and measuring a first received power of the first protocol packet and a second received power of the second protocol packet at the access point. The method further includes determining whether reception times of the first protocol packet and the second protocol packet are within a coherence time for the communication channel and, when the reception times are within the coherence time, combining the first received power and the second received power into a multiprotocol received power. The method also includes determining a location of the wireless device based on the multiprotocol received power.

公开(公告)号：US20210266137A1

公开(公告)日：2021-08-26

申请号：US16801944

申请日：2020-02-26

Applicant: Cisco Technology, Inc.

Inventor： Pooya Monajemi ,  Brian Hart ,  Matthew Aaron Silverman ,  Gautam D. Bhanage

IPC: H04L5/14 ,  H04W52/28 ,  H04W74/08

Abstract: A wireless access point device is full-duplex capable and serves wireless communication for at least first and second wireless client devices. The wireless access point device sends to the first wireless client device a trigger frame that causes the first wireless client device to send an uplink transmission to the wireless access point after a first time interval. The wireless access point device waits a second time interval after the first wireless client is expected to begin sending the uplink transmission. The wireless access point device receives the uplink transmission from the first wireless client device. After the second time interval, and while receiving the uplink transmission from the first wireless client device, the wireless access point device sends to the second wireless client device a downlink transmission that overlaps at least partially in frequency and time with the uplink transmission from the first wireless client device.

公开(公告)号：US11063675B2

公开(公告)日：2021-07-13

申请号：US16292962

申请日：2019-03-05

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Pooya Monajemi ,  Vishal Satyendra Desai ,  John Martin Blosco

IPC: H04B15/00 ,  H04B17/318 ,  H04B1/38

Abstract: An access point allocates resource units within a first channel to mitigate interference from an adjacent second channel. The access point obtains a measure of signal strength corresponding to each wireless device attached to an access point, and assigns, for each wireless device, resource units with a first frequency band of the first channel to mitigate interference with a second frequency band of a second channel adjacent to the first channel. An assignment between a set of resource units and a particular wireless device is based on the measure of signal strength corresponding to the particular wireless device. The access point communicates with the wireless devices on the resource units.

公开(公告)号：US20210083927A1

公开(公告)日：2021-03-18

申请号：US16571360

申请日：2019-09-16

Applicant: Cisco Technology Inc.

Inventor： Gautam Bhanage ,  Matthew Aaron Silverman ,  Pooya Monajemi ,  Brian Hart

IPC: H04L12/24 ,  H04L5/00 ,  H04W72/08 ,  H04L12/26

Abstract: A method is provided in wireless access point in a wireless communications network. The method includes assigning a first resource unit for a first transmission between the wireless access point and a wireless terminal. The method further includes determining that the first transmission using the first resource unit failed. The method further includes selecting a candidate resource unit for a retry transmission. The candidate resource unit is selected based on at least an average previous success rate of available resource units at a width of the first resource unit and a correlation between the candidate resource unit and the first resource unit. The method further includes assigning the candidate resource unit for the retry transmission if a success rate of the candidate resource unit is above a predetermined threshold.

公开(公告)号：US20210067210A1

公开(公告)日：2021-03-04

申请号：US16559356

申请日：2019-09-03

Applicant: Cisco Technology, Inc.

Inventor： Matthew Aaron Silverman ,  Fred J. Anderson ,  Ardalan Alizadeh ,  Huaiyi Wang

IPC: H04B7/0417 ,  H04B7/06 ,  H04L5/00

Abstract: In one embodiment, a method includes identifying a number of configured proactive repetitions in downlink transmissions from the base station, selecting k antenna states for receiving repetitive downlink transmissions among the number of antenna states, where k equals the number of configured proactive repetitions, and where each of the k antenna states corresponds to each of the repetitive downlink transmissions, transmitting a CSI report for each of the k antenna states to the base station, where a CSI report for an antenna state is used by the base station to adjust configurations for the corresponding downlink transmission, receiving signals for each of the k repetitive downlink transmissions from the base station using each of the k antenna states, and decoding the downlink transmission based on k sets of received signals, each of the k sets being received using each of the k selected antenna states.

公开(公告)号：US10938629B1

公开(公告)日：2021-03-02

申请号：US16571360

申请日：2019-09-16

Applicant: Cisco Technology Inc.

Inventor： Gautam Bhanage ,  Matthew Aaron Silverman ,  Pooya Monajemi ,  Brian Hart

IPC: H04L5/00 ,  H04L12/24 ,  H04L12/26 ,  H04W72/08 ,  H04W88/08 ,  H04W84/12

Abstract: A method is provided in wireless access point in a wireless communications network. The method includes assigning a first resource unit for a first transmission between the wireless access point and a wireless terminal. The method further includes determining that the first transmission using the first resource unit failed. The method further includes selecting a candidate resource unit for a retry transmission. The candidate resource unit is selected based on at least an average previous success rate of available resource units at a width of the first resource unit and a correlation between the candidate resource unit and the first resource unit. The method further includes assigning the candidate resource unit for the retry transmission if a success rate of the candidate resource unit is above a predetermined threshold.