公开(公告)号：US20200374810A1

公开(公告)日：2020-11-26

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

IPC: H04W52/24 ,  H04W52/14 ,  H04W24/10 ,  H04W52/34

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.

公开(公告)号：US10433313B2

公开(公告)日：2019-10-01

申请号：US15141922

申请日：2016-04-29

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/12 ,  H04W84/12 ,  H04W88/08 ,  H04L29/06 ,  H04L29/08 ,  H04W24/04

Abstract: Techniques are provided herein to allow a wireless network access point (AP) to more fully use its bandwidth in order to leverage the different bandwidth capabilities of different types of wireless client devices that the AP serves. The AP generates control parameters for usage of a plurality of channels in a bandwidth during a downlink transmission interval. The control parameters comprise information indicating channel assignments that result in multiple downlink transmissions that at least partially overlap in time to different wireless client devices according to their respective bandwidth capabilities. The AP transmits the control parameters in a control frame in advance of the downlink transmission interval on each of the plurality of channels in the bandwidth.

公开(公告)号：US10312979B2

公开(公告)日：2019-06-04

申请号：US15220701

申请日：2016-07-27

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  Paul J. Stager ,  David Kloper ,  Jie Cheng Jiang

IPC: H04W72/04 ,  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.

公开(公告)号：US10218539B2

公开(公告)日：2019-02-26

申请号：US15660905

申请日：2017-07-26

Applicant: Cisco Technology, Inc.

Inventor： David S. Kloper ,  Brian D. Hart ,  Dipankar B. Acharya

IPC: H04L12/64 ,  H04L12/46 ,  H04W16/02 ,  H04W24/02 ,  H04W88/10

Abstract: The present disclosure discloses a distributed system. The distributed system includes a plurality of radio heads and a plurality of controllers disposed in one or more chassis external to the plurality of radio heads. Each of the plurality of controllers includes a baseband unit (BBU), an uplink time-division multiplexing (TDM) switch and a downlink TDM switch. The uplink TDM switch and the downlink TDM switch forward data bits between a radio head and a BBU by using TDM cells which may reduce latency relative to using Ethernet frames.

公开(公告)号：US20180343674A1

公开(公告)日：2018-11-29

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 ,  H04W72/04 ,  H04W52/46 ,  H04L1/00 ,  H04W52/24 ,  H04W52/22 ,  H04L5/00 ,  H04W52/36

CPC classification number: H04W74/08 ,  H04L1/00 ,  H04L5/0055 ,  H04W52/228 ,  H04W52/245 ,  H04W52/367 ,  H04W52/46 ,  H04W72/0473 ,  H04W74/0808

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：US09942020B1

公开(公告)日：2018-04-10

申请号：US15497558

申请日：2017-04-26

Applicant: Cisco Technology, Inc.

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

IPC: H04B1/10 ,  H04L5/00 ,  H04B7/0413 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04L5/0062 ,  H04B7/0413 ,  H04J11/0036 ,  H04L5/0098 ,  H04L25/03

Abstract: Embodiments herein describe recovering data packets received by a plurality of wireless antennas of a radio head. In one embodiment, the signals received by the radio head are filtered using a single filter to recover at least one data packet. In another embodiment, the signals received by the radio head are filtered using a plurality of filters to recover at least one data packet. In one embodiment, a controller coupled with the radio head filters the received signals and recovers the at least one data packet.

公开(公告)号：US20170150522A1

公开(公告)日：2017-05-25

申请号：US15428370

申请日：2017-02-09

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart

IPC: H04W74/04 ,  H04B17/318

CPC classification number: H04B17/318 ,  H04B17/345 ,  H04B17/373 ,  H04W52/223 ,  H04W52/242 ,  H04W74/0808 ,  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：US20170012752A1

公开(公告)日：2017-01-12

申请号：US14796001

申请日：2015-07-10

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  Matthew A. Silverman ,  Paul J. Stager ,  David Kloper

IPC: H04L5/00 ,  H04B7/04 ,  H04W72/04

CPC classification number: H04W72/0413 ,  H04B7/0452 ,  H04B7/0626 ,  H04L1/18 ,  H04L5/0048 ,  H04W72/042 ,  H04W84/12

Abstract: In accordance with an embodiment, a method is provided in which a first wireless access point sends a downlink multi-user multiple-input multiple-output (MIMO) transmission to a plurality of client devices. The downlink multi-user MIMO transmission is configured to solicit acknowledgments from two or more of the plurality of client devices. The acknowledgments are received at a plurality of antennas of the first wireless access point from the two or more of the plurality of client devices. Uplink multi-user MIMO processing of the acknowledgments is performed from the two or more of the plurality of client devices to recover the acknowledgments respectively from each of the two or more of the plurality of client devices.

Abstract translation: 根据实施例，提供了一种方法，其中第一无线接入点向多个客户端设备发送下行链路多用户多输入多输出（MIMO）传输。 下行链路多用户MIMO传输被配置为从多个客户端设备中的两个或多个客户端设备请求确认。 在多个客户端设备中的两个或更多个的第一无线接入点的多个天线处接收确认。 从多个客户端设备中的两个或多个客户机设备执行确认的上行链路多用户MIMO处理，以分别从多个客户端设备中的两个或多个客户机设备中的每一个恢复确认。

公开(公告)号：US20160309537A1

公开(公告)日：2016-10-20

申请号：US14687241

申请日：2015-04-15

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart ,  John Matthew Swartz ,  Joshua Suhr ,  Matthew A. Silverman ,  Tak Ming Pang

IPC: H04W76/02 ,  H04B17/318 ,  H04W24/08

CPC classification number: H04W76/027 ,  H04B17/318 ,  H04W76/18

Abstract: In response to receiving a probe request from a mobile client, an access point determines whether it should suppress a probe response. The access point receives a probe request from a wireless client device, and prepares a probe response to respond to the probe request. The access point determines whether the wireless client device is likely to associate with the wireless access point. Responsive to a determination that the wireless client device is unlikely to associate with the wireless access point, the access point suppresses the transmission of the probe response.

Abstract translation: 响应于从移动客户端接收到探测请求，接入点确定是否应该抑制探测响应。 接入点从无线客户端设备接收探测请求，并准备探测响应以响应探测请求。 接入点确定无线客户端设备是否可能与无线接入点相关联。 响应于无线客户端设备不可能与无线接入点相关联的确定，接入点抑制探测响应的传输。

公开(公告)号：US20160249342A1

公开(公告)日：2016-08-25

申请号：US15141922

申请日：2016-04-29

Applicant: Cisco Technology, Inc.

Inventor： Brian D. Hart

IPC: H04W72/04 ,  H04L29/06 ,  H04L5/00 ,  H04L29/08 ,  H04W72/12 ,  H04W24/04

CPC classification number: H04W72/048 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0037 ,  H04L5/0055 ,  H04L5/0064 ,  H04L5/0087 ,  H04L5/0094 ,  H04L69/22 ,  H04L69/323 ,  H04W24/04 ,  H04W72/0453 ,  H04W72/1289 ,  H04W84/12 ,  H04W88/08

Abstract: Techniques are provided herein to allow a wireless network access point (AP) to more fully use its bandwidth in order to leverage the different bandwidth capabilities of different types of wireless client devices that the AP serves. The AP generates control parameters for usage of a plurality of channels in a bandwidth during a downlink transmission interval. The control parameters comprise information indicating channel assignments that result in multiple downlink transmissions that at least partially overlap in time to different wireless client devices according to their respective bandwidth capabilities. The AP transmits the control parameters in a control frame in advance of the downlink transmission interval on each of the plurality of channels in the bandwidth.

Abstract translation: 本文提供技术以允许无线网络接入点（AP）更充分地使用其带宽，以便利用AP服务的不同类型的无线客户端设备的不同带宽能力。 AP在下行链路传输间隔期间产生用于在带宽中使用多个信道的控制参数。 控制参数包括指示根据各自的带宽能力导致至少部分地与不同无线客户端设备重叠的多个下行链路传输的信道分配的信息。 AP在带宽中的多个信道中的每一个上的下行链路传输间隔之前的控制帧中发送控制参数。