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11.发明授权公开(公告)号：US10601475B2
公开(公告)日：2020-03-24
申请号：US16383915
申请日：2019-04-15
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.
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12.发明授权公开(公告)号：US10306675B2
公开(公告)日：2019-05-28
申请号：US15585400
申请日：2017-05-03
Applicant: Cisco Technology, Inc.
Inventor： David Kloper , Brian D. Hart , Matthew A. Silverman , Paul J. Stager
Abstract: A central processor subsystem controls multiple transceivers. Each transceiver transmits protocol data units from antennas of that transceiver and produces receive waveforms from wirelessly received signals at the one or more antennas. A transmit waveform, including a frame addressed to one or more wireless client devices, is sent through a first transceiver to be transmitted wirelessly by the first transceiver on a frequency channel. A receive waveform, representative of the transmission by the first transceiver and wirelessly received at a second transceiver, is received from the second transceiver. While the transmit waveform is being sent to the first transceiver: a level of collision between the receive waveform and another transmission on the frequency channel is detected; and if the level of collision exceeds a threshold prior to an end of the receive waveform, the transmit waveform being sent to the first transceiver is modified to reduce the collision.
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13.发明申请公开(公告)号：US20190137596A1
公开(公告)日：2019-05-09
申请号：US15808105
申请日：2017-11-09
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Oscar Bejarano Chavez , Paul J. Stager , David Kloper
CPC classification number: G01S5/06 , H04B7/0802 , H04B7/0871 , H04L25/0224
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.
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公开(公告)号：US09823330B2
公开(公告)日：2017-11-21
申请号：US13886533
申请日：2013-05-03
Applicant: CISCO TECHNOLOGY, INC.
Inventor： Brian Donald Hart , Paul J. Stager , Santosh Pandey , David Kloper , Dan Lyons , Matthew A. Silverman
CPC classification number: G01S3/38 , G01S1/68 , G01S3/48 , H04W64/006
Abstract: In one embodiment, an apparatus includes a plurality of antennas, a receiver in communication with said plurality of antennas for receiving one or more packets in a block based modulation environment, a switch interposed between a portion of the antennas and the receiver for switching between the antennas, and a processor for calculating angle of arrival for use in identifying a location of a mobile device transmitting the one or more packets.
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15.发明申请Concurrent On-Channel Servicing of Wireless Client Traffic and Off-Channel Pre-Scanning for Radar in a Wireless Access Point 有权无线接入点无线客户端流量和雷达无线通道预扫描的并发通道服务公开(公告)号：US20160073403A1
公开(公告)日：2016-03-10
申请号：US14479521
申请日：2014-09-08
Applicant: Cisco Technology, Inc.
Inventor： David Kloper , Raghuram Rangarajan , Greg Corsetto
Abstract: An access point (AP) includes a transceiver to service wireless client traffic on wireless channels within a channel bandwidth. The AP services wireless client traffic in a first channel bandwidth and sets a receiver bandwidth to include the first channel bandwidth and a second channel bandwidth initially not available for servicing wireless client traffic. Concurrent with servicing the wireless client traffic in the first channel bandwidth, the AP searches the second channel bandwidth for any interference signal. If no interference signal is found in the second channel bandwidth, the AP declares the second channel bandwidth free of interference.
Abstract translation: 接入点（AP）包括收发信机以在信道带宽内的无线信道上服务无线客户端业务。 AP服务无线客户端在第一信道带宽中的业务，并且设置接收机带宽以包括第一信道带宽和最初不可用于服务无线客户端业务的第二信道带宽。 与第一通道带宽中的无线客户端业务服务同时，AP在第二信道带宽上搜索任何干扰信号。 如果在第二信道带宽中没有发现干扰信号，则AP声明第二信道带宽没有干扰。
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Patent Agency Ranking
公开(公告)号：US09219986B2
公开(公告)日：2015-12-22
申请号：US14258104
申请日：2014-04-22
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Brian D. Hart , Shaunak Joshi , David Kloper , Donald R. Peoples
CPC classification number: H04W4/023 , H04W48/16 , H04W56/001 , H04W64/003
Abstract: A wireless receiver (e.g., access point (AP)) is a member of a group of a plurality of receivers in a wireless local area network and time synchronized with other receivers in the group. A channel scan list is generated from a plurality of wireless channels available in one or more frequency bands. A channel is selected for the receiver to monitor from the channel scan list based on a current time at the receiver such that each of the plurality of receivers in the group are scanning the same channel at the same time. The selected channel is scanned and signal characteristic information (e.g., received signal strength (RSS)) is generated for the signals received during a given scan duration.
Abstract translation: 无线接收器（例如，接入点（AP））是无线局域网中的多个接收机的组的成员，并且与该组中的其他接收机同步的时间。 从一个或多个频带中可用的多个无线信道生成频道扫描列表。 基于接收机当前的时间，从频道扫描列表中选择频道以使接收机监视，使得组中的多个接收机中的每一个同时扫描相同的频道。 扫描所选择的信道，并且在给定的扫描持续时间内为接收到的信号生成信号特征信息（例如，接收信号强度（RSS））。
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公开(公告)号：US11838862B2
公开(公告)日：2023-12-05
申请号：US17522774
申请日：2021-11-09
Applicant: Cisco Technology, Inc.
Inventor： Pooya Monajemi , Gautam Bhanage , David Kloper , Young Il Choi , Vishal Satyendra Desai , Santosh Bahaji Kulkarni
CPC classification number: H04W52/0216 , H04W72/20 , H04W84/12 , H04W92/20
Abstract: In one embodiment, a first wireless access point (AP) of a first basic service set (BSS) receives, from a second wireless AP of a second BSS, data indicative of an 802.11-based target wake time (TWT) schedule of a client of the second BSS. The first wireless AP identifies, from the receive data, a scheduled communication time of the client of the second BSS in the TWT schedule. The first wireless AP generates an 802.11-based TWT schedule for a client of the first BSS that avoids the scheduled communication time of the client of the second BSS. The first wireless AP sends the generated 802.11-based TWT schedule to the client of the first BSS, wherein the sent TWT schedule causes the client of the first BSS to wake from sleep at a scheduled wake time.
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公开(公告)号：US11184849B2
公开(公告)日：2021-11-23
申请号：US16572689
申请日：2019-09-17
Applicant: Cisco Technology, Inc.
Inventor： David Kloper
Abstract: Presented herein are methodologies for handling multicast traffic that is transmitted to mobile devices in a given basic service set (BSS). The methodology includes detecting membership of clients in an Internet Protocol (IP) multicast group in a basic service set of a wireless network; determining whether the IP multicast group and its associated multicast traffic meet predetermined criteria; when the IP multicast group and its associated multicast traffic meet the predetermined criteria, negotiating with each client in the IP multicast group to have a target wake time (TWT) that includes, at least, a coincident overlap window of sufficient duration to transmit the multicast traffic associated with the IP multicast group; and transmitting the multicast traffic associated with the IP multicast group during the coincident overlap window, wherein the coincident overlap window is different from a delivery traffic indication message (DTIM) service period.
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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
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.
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公开(公告)号：US20210084588A1
公开(公告)日：2021-03-18
申请号：US16572689
申请日：2019-09-17
Applicant: Cisco Technology, Inc.
Inventor： David Kloper
IPC: H04W52/02
Abstract: Presented herein are methodologies for handling multicast traffic that is transmitted to mobile devices in a given basic service set (BSS). The methodology includes detecting membership of clients in an Internet Protocol (IP) multicast group in a basic service set of a wireless network; determining whether the IP multicast group and its associated multicast traffic meet predetermined criteria; when the IP multicast group and its associated multicast traffic meet the predetermined criteria, negotiating with each client in the IP multicast group to have a target wake time (TWT) that includes, at least, a coincident overlap window of sufficient duration to transmit the multicast traffic associated with the IP multicast group; and transmitting the multicast traffic associated with the IP multicast group during the coincident overlap window, wherein the coincident overlap window is different from a delivery traffic indication message (DTIM) service period.
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