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    FILTERING BROADCAST PACKETS IN DISTRIBUTED COMMUNICATION SYSTEMS
    71.
    发明申请
    FILTERING BROADCAST PACKETS IN DISTRIBUTED COMMUNICATION SYSTEMS 有权

    公开(公告)号：US20250097157A1

    公开(公告)日：2025-03-20

    申请号：US18677759

    申请日：2024-05-29

    Applicant: Cisco Technology, Inc.

    Inventor： Bart Brinckman ,  Muhammad SHAHZAD

    IPC: H04L47/24 ,  H04L47/32

    Abstract: Devices, systems, methods, and processes for filtering of received broadcast packets at access points (APs) connected to a controller. Typically, the APs forward all the received broadcast packets to the controller for processing. Many of these broadcast packets may not be subscribed by any application and thus are dropped by the controller. Thus, both the APs and the controller resources are being wasted in processing the broadcast packets that may eventually be dropped. The controller, therefore, generates a filtering ruleset to drop one or more broadcast packets from the received broadcast packets based on one or more subscriptions from applications. The controller may install the filtering ruleset on the APs, so that only the broadcast packets subscribed by the applications are received by the controller. Further, the controller may run periodic updates on the filtering ruleset to accommodate any new subscriptions, new allow rule or drop rule from the applications.

    GNSS Driven Dynamic Partitioning of APs
    73.
    发明申请
    GNSS Driven Dynamic Partitioning of APs 有权

    公开(公告)号：US20250093530A1

    公开(公告)日：2025-03-20

    申请号：US18467040

    申请日：2023-09-14

    Applicant: Cisco Technology, Inc.

    Inventor： Ardalan Alizadeh ,  Navid Reyhanian ,  Audrey Yazdanparast ,  Peiman Amini ,  Jerome Henry

    IPC: G01S19/48

    Abstract: Described herein are devices, systems, methods, and processes for managing the computational complexity in geolocating a large number of network devices (e.g., access points (APs)) in indoor environments. A number of network devices may be partitioned into smaller groups or batches based on neighbor knowledge about the network devices. Each batch of network devices can include just devices located on a same floor, or may include devices located across different floors. Every batch may include at least one anchor network device. The geolocation of the network devices can be determined, batch-by-batch, based on fusing global navigation satellite system (GNSS) pseudorange measurements and inter-network device ranging measurements. The geolocation accuracy for each partition can be evaluated utilizing such metrics as the average residual error. If the error for a batch is greater than a threshold, remedial measures may be taken to reduce the error and improve the geolocation accuracy.

    Mobile time-sync distribution
    74.
    发明授权
    Mobile time-sync distribution 有权

    公开(公告)号：US12256355B2

    公开(公告)日：2025-03-18

    申请号：US18200231

    申请日：2023-05-22

    Applicant: Cisco Technology, Inc.

    Inventor： Malcolm Muir Smith ,  Jerome Henry

    IPC: H04W56/00 ,  H04L43/0864

    Abstract: This technology allows time synchronization in wireless networks with mobile stations. A wireless network controller transmits instructions to access points (“APs”) within the wireless network to monitor transmissions for time synchronization. One or more second APs observe fine time measurement (“FTM”) exchanges between a first AP and a mobile station. A particular second AP determines whether to perform a time synchronization with the first AP based on the detection of the FTM exchange or a determination that the station is moving toward the second AP. For time synchronization, the second AP determines the time that the first AP transmitted the FTM exchange and the time of transmission from the first AP to the second AP. The second AP synchronizes a second AP clock to the summation of the time of the transmission of the FTM exchange and the time of transmission from the first AP to the second AP.

    Method to control multiple cameras in a conference room based on audio tracking and head detection data
    75.
    发明授权
    Method to control multiple cameras in a conference room based on audio tracking and head detection data 有权

    公开(公告)号：US12256173B1

    公开(公告)日：2025-03-18

    申请号：US17943433

    申请日：2022-09-13

    Applicant: Cisco Technology, Inc.

    Inventor： Gisle Langen Enstad

    IPC: H04N7/15 ,  G06T7/70 ,  G10L25/06 ,  G10L25/57 ,  G10L25/78 ,  H04L65/403 ,  H04N5/268 ,  H04R1/40 ,  H04R3/00

    Abstract: A method comprises, at a video conference system having cameras and microphone arrays each co-located with a corresponding one of the cameras: detecting a face of a participant, and estimating orientations of the face relative to the cameras, based on video captured by the cameras; receiving, from each of the microphone arrays, at least two microphone signals that represent detected audio from the participant; separately correlating the at least two microphone signals from each of the microphone arrays against each other using a correlation function, to produce correlation peaks for the microphone arrays corresponding to the microphone arrays and the cameras; determining a preferred camera among the cameras based on the correlation peaks and the orientations of the face relative to the cameras; and transmitting the video captured by the preferred camera to a network.

    Leveraging contextual metadata communication to improve DNS security
    76.
    发明授权
    Leveraging contextual metadata communication to improve DNS security 有权

    公开(公告)号：US12255868B2

    公开(公告)日：2025-03-18

    申请号：US17862019

    申请日：2022-07-11

    Applicant: Cisco Technology, Inc.

    Inventor： Barry Qi Yuan ,  Robert Edgar Barton

    IPC: H04L61/4511 ,  H04L9/32 ,  H04L61/2514

    Abstract: Techniques for leveraging efficient metadata communications to improve domain name system (DNS) security are described. The DNS service uses a hash value to uniquely identify a client, and detect any change in metadata in order to keep policies up-to-date for the client. In an example method a first DNS query for a client device is intercepted. A cryptographic hash function is applied to metadata associated with the client device to generate a hash value. The hash value is added to an additional records section of the first DNS query to generate a second DNS query. The second DNS query is transmitted to a DNS service. The metadata associated with the client device is transmitted to the DNS service on an out-of-band encrypted channel. A DNS response, including the hash value, is received from the DNS service and transmitted to the client device.

    METHOD AND SYSTEM FOR CAPABILITY AWARENESS IN STEERING OF ROAMING
    79.
    发明申请
    METHOD AND SYSTEM FOR CAPABILITY AWARENESS IN STEERING OF ROAMING 有权

    公开(公告)号：US20250088952A1

    公开(公告)日：2025-03-13

    申请号：US18463057

    申请日：2023-09-07

    Applicant: Cisco Technology, Inc.

    Inventor： Vimal Srivastava ,  Sri Gundavelli ,  Ravi Kiran Guntupalli

    IPC: H04W48/18 ,  H04W8/22 ,  H04W48/16 ,  H04W60/00

    Abstract: Systems and methods are provide to bring network capability awareness to steering of roaming (SoR). A home network includes a capabilities list of visited networks and their associated with the network capabilities. For SoR, he user equipment (UE) maintains a roaming partners list (RPL). The RPL provides a list of visited networks arranged in order of priority/preference (e.g., the first visited network in the RPL has first priority). The first visited network receives a registration request from the UE and relays a corresponding authentication request to the home network. The visited network in the RPL can be reordered when the UE requires a network capability not supported by the first visited network in the RPL, as indicated by the capabilities list. Depending on the implementation, the UE or the home network can make this decision to reorder the RPL.

    OPTIMIZED AGENT DEPLOYMENT FOR DATACENTER MONITORING
    80.
    发明申请
    OPTIMIZED AGENT DEPLOYMENT FOR DATACENTER MONITORING 有权

    公开(公告)号：US20250088448A1

    公开(公告)日：2025-03-13

    申请号：US18244597

    申请日：2023-09-11

    Applicant: Cisco Technology, Inc.

    Inventor： Raghu Rajendra Arur ,  Indermeet Singh GANDHI

    IPC: H04L43/50 ,  H04L43/065 ,  H04L43/0852

    Abstract: In one implementation, a device determines a plurality of routes from one or more sources in a localized network domain to external addresses via a plurality of border leaf nodes of the localized network domain. The device selects, based on a specific performance test from a particular source of the one or more sources to a particular endpoint with a corresponding external address, a particular border leaf node of the plurality of border leaf nodes that is along a utilized route from the particular source to the particular endpoint based on the corresponding external address and the plurality of routes. The device causes the specific performance test to be executed from a particular testing agent installed on the particular border leaf node to the particular endpoint.

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