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公开(公告)号：US20130177110A1
公开(公告)日：2013-07-11
申请号：US13781822
申请日：2013-03-01
Applicant: Cisco Technology, Inc.
Inventor： Raghuram Rangarajan , Brian Donald Hart , Paul J. Stager
IPC: H04L29/06
CPC classification number: H04L69/22 , H04L1/08 , H04L7/08 , H04L27/2607 , H04L27/2647 , H04L27/2656 , H04L27/2671 , H04L27/2679
Abstract: A mid-packet detection technique is provided that detects a packet with periodic repetitions of a fixed duration at a point in time of the packet other than a start-of-packet pattern, e.g., a preamble, associated with the packet. The process performs packet detection without detecting a preamble and does not require carrier frequency recovery, timing recovery (synchronization) or channel estimation. In one embodiment, a doubly differential matched filter autocorrelation of the received signal is computed and used as a metric for packet detection when the preamble is not observed or to complement preamble detection. The metric is compared to a threshold to indicate detection of a packet.
Abstract translation: 提供了一种中间包检测技术，其检测分组的周期性重复，该分组在分组的时间点不同于与分组相关联的分组开始模式（例如，前导码）。 该过程执行分组检测而不检测前导码，并且不需要载波频率恢复，定时恢复（同步）或信道估计。 在一个实施例中，计算接收信号的双差分匹配滤波器自相关，并将其用作当没有观察到前同步码时的分组检测的度量或用于对前导码检测进行补码。 将度量与阈值进行比较以指示分组的检测。
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公开(公告)号：US20250031277A1
公开(公告)日：2025-01-23
申请号：US18513013
申请日：2023-11-17
Applicant: Cisco Technology, Inc.
Inventor： Sri Gundavelli , Mark Grayson , Brian Donald Hart , Matthew Stephen MacPherson , Pradeep Kumar Kathail
IPC: H04W76/50 , H04W72/50 , H04W72/563
Abstract: In one aspect, a method for enabling EPCS in a network includes receiving a request from a network device to establish a connection to the network, wherein the request indicates an emergency event and at least one user equipment associated with the emergency event; prioritizing, for the network device, access to the network based on the request in accordance with a resource allocation policy comprising a plurality of access levels associated with a plurality of EPCS groups; allocating network resources in accordance with the resource allocation policy to the network device, wherein the one or more network resources are configured to modify a set of attributes of the network device to grant the network device an increased priority related to the emergency event; and transmitting a message to the network device to indicate authorization for the network device to establish a connection with the network according to the increased priority.
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13.发明申请公开(公告)号：US20240380640A1
公开(公告)日：2024-11-14
申请号：US18356550
申请日：2023-07-21
Applicant: Cisco Technology, Inc.
Inventor： Matthew Aaron Silverman , Malcolm Muir Smith , Brian Donald Hart , Indermeet Singh Gandhi , John Matthew Swartz
Abstract: The present disclosure is directed to simultaneous channel sounding on multiple MLO channels followed by determining phase and amplitude corrections based on channel impulse responses obtained on each MLO channel. The corrections are then used in subsequent extrapolation of channel sounding on one channel to another. In one aspect, a method includes transmitting, on each radio interface of a first multi-link device, a corresponding sounding probe to a second multi-link device; determining, by each radio interface of the first multi-link device, a corresponding channel impulse response based on the corresponding sound probe to yield a plurality of channel impulse responses; determining an offset between the plurality of channel impulse responses; and using the offset during a subsequent extrapolation of a sounding probe on one radio interface to a second radio interface of the first multi-link device.
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公开(公告)号：US20240298216A1
公开(公告)日：2024-09-05
申请号：US18394102
申请日：2023-12-22
Applicant: Cisco Technology, Inc.
Inventor： Brian Donald Hart , Malcolm Muir Smith
Abstract: Disclosed herein are systems, methods, and computer-readable media for minimizing pre-roaming resource reservations. In one aspect, it is determined that a client device connected to a first Access Point (AP) will roam, based on the determination, generating a list of APs that are roam candidates supportive of one or more resources needed by the client device, issuing a reservation request to the roam candidates, where the reservation request includes a timeout feature that persists the reservation at each AP on the list of APs for a set period of time, determining that a second AP within the list of APs will honor the reservation request, and automatically withdrawing the reservation request when the timeout feature has expired and the client device has not connected to the second AP, where the withdrawal of the reservation request frees up the one or more resources associated with the reservation request at each AP on the list of APs.
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公开(公告)号：US09572026B2
公开(公告)日：2017-02-14
申请号：US13652594
申请日：2012-10-16
Applicant: Cisco Technology, Inc.
Inventor： Brian Donald Hart , Santosh Pandey , Kayshav Dattatri
Abstract: In an example embodiment, a wireless device is operable to advertise a policy on the inclusion of the wireless device in a radio frequency map. For example, the wireless device may transmit a signal comprising a field in an extended capabilities information that indicates whether mapping of the wireless device is permissible. As another example, the wireless device may perform certain actions, such as changing media access control address, changing transmit power, and/or vary response times to prevent accurate mapping of the location of the wireless device.
Abstract translation: 在示例实施例中，无线设备可操作以在无线电频率映射中公布关于将无线设备包括在内的策略。 例如，无线设备可以在指示是否允许无线设备的映射的扩展能力信息中发送包括字段的信号。 作为另一示例，无线设备可以执行某些动作，例如改变媒体访问控制地址，改变发射功率和/或改变响应时间，以防止无线设备的位置的精确映射。
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Patent Agency Ranking
公开(公告)号：US20250039774A1
公开(公告)日：2025-01-30
申请号：US18359711
申请日：2023-07-26
Applicant: Cisco Technology Inc.
Inventor： Al W. Dumdei , Malcolm Smith , Brian Donald Hart
IPC: H04W48/16 , H04W28/02 , H04W28/24 , H04W72/566
Abstract: The present disclosure is directed to detecting, by a first wireless endpoint device associated with a first basic service set (BSS) neighboring a neighboring overlapping BSS (OBSS), a received data packet from a second wireless endpoint device associated with the OBSS, upon determining the received data packet satisfies a first OBSS threshold and a high-priority data packet is in queue for transmission by the first wireless endpoint device, determining whether the received data packet satisfies a second OBSS threshold, maintaining the high-priority data packet in queue if the received data packet satisfies a second OBSS threshold, and transmitting the high-priority data packet by the first wireless endpoint device if the received data packet does not satisfy the second OBSS threshold.
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公开(公告)号：US20240381124A1
公开(公告)日：2024-11-14
申请号：US18362264
申请日：2023-07-31
Applicant: Cisco Technology, Inc.
Inventor： Indermeet Singh Gandhi , Malcolm Smith , Brian Donald Hart
Abstract: A system and method for stateful access point link disablement mechanisms for improving network efficiency. In one embodiment, a method includes receiving a management frame that indicates a data transfer from a station, where the management frame comprises information identifying one or more characteristics of the data transfer, selecting a communication link based at least in part on the management frame, and communicating information associated with the communication link to one or more other stations.
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公开(公告)号：US10820284B2
公开(公告)日：2020-10-27
申请号：US16120124
申请日：2018-08-31
Applicant: Cisco Technology, Inc.
Inventor： Pooya Monajemi , Amir Hosein Kamalizad , Vishal Satyendra Desai , Brian Donald Hart
Abstract: In one embodiment, a method is performed. A first wireless access point (AP) device may generate a timing synchronization frame. The timing synchronization frame may include a target beacon transmission time (TBTT) associated with the first wireless AP device. The first wireless AP device may transmit the timing synchronization frame to a second wireless AP device. The first and second wireless AP devices may be synchronized using the timing synchronization frame.
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公开(公告)号：US10149093B2
公开(公告)日：2018-12-04
申请号：US15662111
申请日：2017-07-27
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Rong Peng , Brian Donald Hart
IPC: H04W4/02 , H04B17/318 , H04B17/21 , H04B17/27 , G01C21/20 , H04B17/391
Abstract: Determining a location of a user device comprises a wireless system supported by wireless access points receiving signals from a user device. The wireless system estimates a location of the user device based on a coarse calculation based on an angle of arrival of the received signal and determines if the user device is in an area under a access point. If so, the wireless system performs a fine location calculation. The wireless system identifies received signal strength indicator values for the user device and uses the values and the calculated location of the user device to improve calibration of a received signal strength location model. If the system determines that the user is not in the area under the access point, the wireless system combines the coarse calculation location and a received signal strength determined location and estimates a location based on the combined calculations.
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公开(公告)号：US09749786B1
公开(公告)日：2017-08-29
申请号：US15077883
申请日：2016-03-22
Applicant: Cisco Technology, Inc.
Inventor： Santosh Pandey , Rong Peng , Brian Donald Hart
IPC: H04W4/02 , H04B17/318 , G01C21/26
CPC classification number: H04W4/02 , G01C21/20 , H04B17/21 , H04B17/27 , H04B17/318 , H04B17/3913
Abstract: Determining a location of a user device comprises a wireless system supported by wireless access points receiving signals from a user device. The wireless system estimates a location of the user device based on a coarse calculation based on an angle of arrival of the received signal and determines if the user device is in an area under a access point. If so, the wireless system performs a fine location calculation. The wireless system identifies received signal strength indicator values for the user device and uses the values and the calculated location of the user device to improve calibration of a received signal strength location model. If the system determines that the user is not in the area under the access point, the wireless system combines the coarse calculation location and a received signal strength determined location and estimates a location based on the combined calculations.
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