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11.发明公开公开(公告)号：US20240349234A1
公开(公告)日：2024-10-17
申请号：US18300696
申请日：2023-04-14
Applicant: Cisco Technology, Inc.
Inventor： Matthew Aaron SILVERMAN , Brian D. HART , Jonathan Matthew SWARTZ
IPC: H04W64/00 , G01S11/06 , H04B17/318
CPC classification number: H04W64/003 , G01S11/06 , H04B17/318 , H04W84/12
Abstract: Transmission (Tx) power variation mitigation for Received Strength of Signal Indicator (RSSI) location may be provided. RSSI data for a station may be received from a plurality of Access Points (APs). The RSSI data may include a RSSI value determined from a Block Acknowledgement (BA) packet and a Starting Sequence Number (SSN) and a bitmap of the BA packet. The plurality of APs may be clustered into one or more clusters based on a combination of the SSN and the bitmap. One or more APs having a same combination of the SSN and the bitmap are clustered into one cluster. A probable location of the station may be determined in each of the one or more clusters based on RSSI values received from the one or more APs of each of the one or more clusters. A final location of the station may be determined based on merging probable locations from the one or more clusters.
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公开(公告)号：US20240015789A1
公开(公告)日：2024-01-11
申请号：US18188263
申请日：2023-03-22
Applicant: Cisco Technology, Inc.
Inventor： Brian D. HART , Pooya MONAJEMI
IPC: H04W74/08
CPC classification number: H04W74/0816 , H04W74/0891
Abstract: Described herein are systems and methods for reducing collisions in a wireless network with overlapping basic service sets by synchronizing contention slots among stations (access points or non-access point clients), some of which are out of range, competing for the use of the wireless medium. In some embodiments, the contention slots of competing stations are synchronized by controlling the time of transmission and the time of the spacing between frames to be an integer multiple of the time of a contention slot. In some embodiments, slot boundaries are enforced by controlling guard intervals or by trigger-based uplink communications. In other embodiments, a central network controller, such as a network controller, synchronizes slots when an access point or station joins the wireless network or uses a neighbor discovery protocol among access points. The contention slots are synchronous in all cases throughout the overlapping basic service sets.
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公开(公告)号：US20240015668A1
公开(公告)日：2024-01-11
申请号：US18054884
申请日：2022-11-11
Applicant: Cisco Technology, Inc.
Inventor： Vishal S. DESAI , Brian D. HART
CPC classification number: H04W52/367 , H04W52/243 , H04W52/42
Abstract: A method includes grouping a plurality of access points based on a proximity of the plurality of access points to each other and determining, based on AFC reports for each of the plurality of access points, a first frequency band in which a threshold number of the plurality of access points are prevented from operating or are limited to operating at a first power that is lower than a maximum allowed standard power. The method also includes determining whether power cutoff in the first frequency band should be static or dynamic and if the power cutoff should be static, instructing the plurality of access points to use a portion of the first frequency band. The method further includes, if the power cutoff should be dynamic, instructing a first subset of the plurality of access points to operate at the first power in the first frequency band.
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公开(公告)号：US20240014866A1
公开(公告)日：2024-01-11
申请号：US18162554
申请日：2023-01-31
Applicant: Cisco Technology, Inc.
Inventor： Ardalan ALIZADEH , Matthew A. SILVERMAN , Sivadeep R. KALAVAKURU , Peiman AMINI , Brian D. HART
IPC: H04B7/0456 , H04L67/104
CPC classification number: H04B7/0456 , H04L67/104 , H04B7/0626
Abstract: Techniques for peer-to-peer (P2P) transmission using interference alignment are disclosed. These techniques include calculating one or more precoder matrices and one more decoder matrices relating to interference alignment for data transmission between a plurality of wireless stations (STAs). The techniques further include initiating P2P transmission between the plurality of STAs using the one or more precoder matrices and the one or more decoder matrices, the P2P transmission including: simultaneously transmitting data between at least two pairs of STAs, of the plurality of STAs, using the one or more precoder matrices and the one or more decoder matrices for interference alignment of the simultaneous transmissions.
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公开(公告)号：US20230388350A1
公开(公告)日：2023-11-30
申请号：US18361779
申请日：2023-07-28
Applicant: Cisco Technology, Inc.
Inventor： Malcolm M. SMITH , Jerome HENRY , Pooya MONAJEMI , Brian D. HART , David S. KLOPER
Abstract: A device includes a memory and a hardware processor communicatively coupled to the memory. The hardware processor determines that a computing device communicatively coupled to an access point performed an action with respect to the access point and in response to determining that the action causes a deviation from a multi-user uplink policy of the access point, transmits a disciplinary message to the computing device.
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Patent Agency Ranking
公开(公告)号：US20220225200A1
公开(公告)日：2022-07-14
申请号：US17144931
申请日：2021-01-08
Applicant: Cisco Technology, Inc.
Inventor： Malcolm Muir SMITH , Brian D. HART , Pooya MONAJEMI , Santosh Babaji KULKARNI , Vishal Satyendra DESAI
Abstract: Seamless client roaming for Multi-Link Device (MLD) clients may be provided. First, a Traffic Identifier (TID)-to-link map may be established by an Upper Service Access Point (U-SAP) of a multi-AP MLD entity that assigns subsets of TIDs to at least two links of the entity. For example, a client device logically associates with the U-SAP, while the client device physically connects to a first and second AP of the entity on a respective first and second link, where the first and second AP include first and second Lower Service Access Points (L-SAPs) and are non-collocated. Next, using the map, data received at the U-SAP is directed over one of the two links for transmission to the client device. Further, frame aggregation and block acknowledgment functions may be performed by one of the first or second L-SAP based on whether data transmission is over the first or second link.
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17.发明申请公开(公告)号：US20190173691A1
公开(公告)日：2019-06-06
申请号：US16262444
申请日：2019-01-30
Applicant: Cisco Technology, Inc.
Inventor： David S. KLOPER , Brian D. HART , Dipankar B. ACHARYA
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.
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18.发明申请公开(公告)号：US20190036737A1
公开(公告)日：2019-01-31
申请号：US15660905
申请日：2017-07-26
Applicant: Cisco Technology, Inc.
Inventor： David S. KLOPER , Brian D. HART , Dipankar B. ACHARYA
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.
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19.发明申请公开(公告)号：US20180317188A1
公开(公告)日：2018-11-01
申请号：US15582024
申请日：2017-04-28
Applicant: Cisco Technology, Inc.
Inventor： Paul J. STAGER , David S. KLOPER , Brian D. HART , Matthew A. SILVERMAN
IPC: H04W56/00
CPC classification number: H04W56/0015
Abstract: Techniques are disclosed to synchronize wireless signal transmission by endpoints controlled by a central controller. For example, an example method of wireless communication includes receiving, at a first device, over a wired medium between the first device and a second device, a plurality of packets from the second device. Each of the plurality of packets comprises data representative of a portion of a signal corresponding to a wireless medium. The method further includes receiving, at the first device, from the second device over the wired medium a synchronization signal based on a common master clock at the second device. The method further includes synchronizing, at the first device, a local clock of the first device to the common master clock based on the synchronization signal. The method further includes reconstructing the signal corresponding to the wireless medium based on the plurality of packets and the synchronized local clock.
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公开(公告)号：US20250081273A1
公开(公告)日：2025-03-06
申请号：US18819604
申请日：2024-08-29
Applicant: Cisco Technology, Inc.
Inventor： Binita GUPTA , Brian D. HART
Abstract: The present disclosure provides techniques for reducing signaling overhead in multi-link reconfiguration. A first MLD generates a first profile for a first link, where the first profile comprises a plurality of parameter sets, each parameter set being allocated an element identifier and comprising a first value set relevant to an operation of the first link. The first MLD generates a second profile for a second link, where one or more parameter sets that have a same value set as in the first profile are omitted, and, for each parameter set that has a different value set from the first profile, the element identifier and a second value set are incorporated into the second profile. The first MLD generates a link reconfiguration frame including the first and second profiles, and sends the frame to a second MLD.
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