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公开(公告)号：US20240380535A1
公开(公告)日：2024-11-14
申请号：US18459544
申请日：2023-09-01
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Sivadeep Reddy Kalavakuru , Ardalan Alizadeh
IPC: H04L5/00
Abstract: Physical Layer Protocol Data Units (PPDUs) with an extension and specifically PPDUs with an extension for Ambient Power (AMP) Backscatter Device (BKD) excitation may be provided. A PPDU with an AMP BKD excitation extension can include an AMP BKD excitation extension field indicating the version and duration of the AMP BKD excitation extension. A method for providing the PPDU with the AMP BKD excitation extension includes generating the PPDU with the AMP BKD excitation extension and the AMP BKD excitation extension field and transmitting the PPDU with the AMP BKD excitation extension.
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公开(公告)号：US20240380249A1
公开(公告)日：2024-11-14
申请号：US18487056
申请日：2023-10-14
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Sivadeep Reddy Kalavakuru , Jerome Henry , Ardalan Alizadeh
Abstract: Coordinated customization of harvesting conditions to ambient power devices may be provided. receive Radio Frequency (RF) characteristics associated with a backscatter communication device may be received. Based on the RF characteristics and a Received Signal Strength Indicator (RSSI) from the backscatter communication device, it may be determined that the computing device has an ability to charge the backscatter communication device to at least meet a predetermined energy need of the backscatter communication device. Next, in response to determining that the computing device has the ability to charge the backscatter communication device, charging of the backscatter communication device to at least meet the predetermined energy need of the backscatter communication device may be scheduled.
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公开(公告)号：US11855914B2
公开(公告)日：2023-12-26
申请号：US16698573
申请日：2019-11-27
Applicant: Cisco Technology, Inc.
Inventor： Santosh B. Kulkarni , Vishal S. Desai , Pooya Monajemi , Young Il Choi , Matthew A. Silverman
IPC: H04L49/9005 , G06F12/084 , G06F12/0864 , H04L43/067 , H04L49/9047 , H04L9/40
CPC classification number: H04L49/9005 , G06F12/084 , G06F12/0864 , H04L43/067 , H04L49/9047 , H04L63/20
Abstract: Embodiments herein describe a group of APs that uses a shared radar cache to select a new channel after vacating a current channel when performing dynamic frequency selection (DFS). The group of APs can set aside memory to store status information about the DFS channels in the frequency band. For example, when one AP detects a radar event (and has to vacate a DFS channel), the AP updates an entry for that channel in the shared radar cache. The APs can also query the cache to determine a new channel after vacating its current channel. That is, the shared radar cache may store the most recent radar events occurring in a channel. In this manner, the APs can select a new channel that has little or no recent radar events, which reduces the likelihood the AP will have to vacate the new channel.
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公开(公告)号：US11835636B2
公开(公告)日：2023-12-05
申请号：US16871967
申请日：2020-05-11
Applicant: Cisco Technology, Inc.
Inventor： Danielle N. Bane , Jonathan M. Cyphert , Sivadeep R. Kalavakuru , Ashish Pasha Sheikh , Matthew A. Silverman
Abstract: The present disclosure provides a dual mode antenna, comprising: a first conductive piece; and a second conductive piece, configured to electromagnetically couple with the first conductive piece through a dielectric at a second frequency to operate as a loop antenna with the first conductive piece and configured to operate independently of the first conductive piece at a first frequency to operate as a monopole antenna. The dual mode antenna can be included in an antenna array as one of a plurality of dual mode antennas coupled to a routing substrate or a reference dual mode antenna coupled to the routing substrate along with a plurality of single mode antennas coupled to the routing substrate; wherein each antenna of the plurality of dual mode antennas, the reference dual mode antenna, and the plurality of single mode antennas is arranged evenly relative to a first neighboring antenna and a second neighboring antenna.
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公开(公告)号：US11737048B2
公开(公告)日：2023-08-22
申请号：US17368676
申请日：2021-07-06
Applicant: Cisco Technology, Inc.
Inventor： Akram I. Sheriff , Jerome Henry , Robert E. Barton , Matthew A. Silverman
CPC classification number: H04W64/003 , G01S11/06 , H04W4/023 , H04W24/10
Abstract: A method includes estimating distances between a user device and an access point based on a series of FTM ranging bursts exchanged between the user device and the access point. The method also includes calculating a variance of the estimated distances and in response to determining that the variance exceeds a threshold, instructing the user device to perform an action that reduces the variance. Other embodiments include a device that performs this method.
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Patent Agency Ranking
公开(公告)号：US11641635B2
公开(公告)日：2023-05-02
申请号：US17445060
申请日：2021-08-13
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Matthew A. Silverman , John M. Swartz , Vishal S. Desai , Robert E. Barton
Abstract: Coordinated radio fine time measurement is provided via sending, from a client device, a ranging request to a first radio; receiving a first response sent at a first time from the first radio over a first channel; receiving a second response sent at the first time from a second radio over a second channel; and calculating, based on times of flight for the first response and the second response, a location of the client device relative to the first radio and to the second radio. Coordinated radio fine time measurement is also proved via in response to receiving, at an Access Point (AP), a ranging request from a client device and determining to respond using multiple channels: sending, both at a first time, a first response from a first radio over a first channel a second response from a second radio over a different channel.
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7.发明申请公开(公告)号：US20190265367A1
公开(公告)日：2019-08-29
申请号：US15904928
申请日：2018-02-26
Applicant: Cisco Technology, Inc.
Inventor： Matthew A. Silverman , Paul J. Stager , Santosh G. Pandey
Abstract: A method for adjusting an installation orientation of an access point within a predefined area with an associated orientation is disclosed. The method includes obtaining, at a computing apparatus, angle of arrival estimates from each access point based on a wireless transmission from a wireless mobile device. The computing device generates an estimated location of the wireless mobile device based on the angle of arrival estimates. Next, the computing device determines an orientation error for each wireless access point based on the angle of arrival estimate of the wireless mobile device and the estimated location of the wireless mobile device. The computing device generates an adjusted orientation of one or more of the access points based on the orientation error of the access point, thereby aligning the adjusted orientation with the orientation of the predefined area.
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公开(公告)号：US10330770B2
公开(公告)日：2019-06-25
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
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：US20190068289A1
公开(公告)日：2019-02-28
申请号：US15722083
申请日：2017-10-02
Applicant: Cisco Technology, Inc.
Inventor： Fred J. Anderson , Oscar Bejarano Chavez , Matthew A. Silverman , Paul J. Stager
IPC: H04B10/564 , H04B10/079 , H04B7/024 , H04W52/02
Abstract: Presented herein are techniques to ensure power emitted by APs during a cooperative MIMO transmission is within certain limits. For a transmission to be made from two or more wireless access points using cooperative multiple-input multiple-output (MIMO) techniques, a measure of separation is determined between the two or more access points. Precoding of signals to be transmitted by the two or more access points is adjusted so as to derate the signals to be transmitted or disable the cooperative nature of the transmission from the two or more access point depending on the measure of separation so that a combined output power from the two or more access points is within a limit.
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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
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.
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