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公开(公告)号：US20250085436A1
公开(公告)日：2025-03-13
申请号：US18466166
申请日：2023-09-13
Applicant: Cisco Technology, Inc.
Inventor： Peiman Amini , Ardalan Alizadeh , Jerome Henry , Rabe Arshad
Abstract: Devices, systems, methods, and processes for hybrid line-of-sight (LOS)/non-line of sight (NLOS) detection are described herein. To facilitate co-existence and co-operation of a fixed network and a wireless network sharing a same frequency band without interference, a device in the wireless network can be configured to perform automatic frequency coordination (AFC). The device can accurately determine a geolocation of the device by utilizing global navigation satellite system (GNSS) data and light detection and ranging (LiDAR) data. The device can also determine whether the fixed station is in the LOS by utilizing the GNSS data and the LiDAR data. The device can further correct the geolocation and improve an accuracy of the LOS/NLOS detection by using both: the GNSS data and the LiDAR data simultaneously. The device can further control an output power when the fixed station is in the LOS, thereby avoiding the interference.
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公开(公告)号：US20240298178A1
公开(公告)日：2024-09-05
申请号：US18495441
申请日：2023-10-26
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Brian D. Hart , Peiman Amini , Stephen M. Orr , Sudhir K. Jain
IPC: H04W12/069 , H04L9/32 , H04W12/63
CPC classification number: H04W12/069 , H04L9/3242 , H04W12/63
Abstract: Fine Time Measurement (FTM) Location Configuration Information (LCI) protection and, specifically, FTM LCI protection with authentication and selective client enablement may be provided. To perform FTM LCI protection, a controller may first obtain a key-pair including a public key and a private key from a Certificate Authority (CA). The controller my determine a venue location where an Access Point (AP) is located. The controller may send a Certificate Signing Request (CSR) with the venue location to the CA. In response to sending the CSR, the controller may receive a public key certificate from the CA, wherein the public key certificate includes the venue location. The AP may receive a request for Location Configuration Information (LCI) from a Station (STA), wherein the LCI includes an AP location. The AP creates a hash of LCI of the AP using the private key and sends the LCI and the hash to the STA.
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公开(公告)号：US20240380459A1
公开(公告)日：2024-11-14
申请号：US18459564
申请日：2023-09-01
Applicant: Cisco Technology, Inc.
Inventor： Ardalan Alizadeh , Navid Reyhanian , Sivadeep R. Kalavakuru , Matthew A. Silverman , Peiman Amini
IPC: H04B7/06 , H04B7/0456
Abstract: Enhancing Multi-Access Point (AP) Coordination (MAPC) null-steering may be provided. Enhancing null-steering may include sending a coordination request for MAPC. A coordination response may be received from one or more APs. A Channel State Information (CSI) request may then be sent. CSI of one or more clients associated with the one or more APs may be received. Next, one or more precoder and decoder matrices may be determined based on the CSI of the one or more clients. The one or more precoder matrices may be sent to the one or more APs, and the one or more decoder matrices may be sent to the one or more clients. A transmission may be sent to a first client using null-steering and interference alignment based on the one or more precoder matrices, wherein the transmitting is synchronized with transmissions by the one or more APs to the one or more clients.
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公开(公告)号：US20250089013A1
公开(公告)日：2025-03-13
申请号：US18465594
申请日：2023-09-12
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Peiman Amini , Ardalan Alizadeh
Abstract: Described herein are devices, systems, methods, and processes for improving the accuracy of access point (AP) location in a Wi-Fi network using client device data and AP ranging measurements. APs may be deployed across a specific area. The APs can range to one another and form a matrix of measurements. Techniques such as semidefinite programming or multidimensional scaling (MDS) can be employed to transform these AP-to-AP ranges into a set of coordinates. Client devices in the area may also range to the APs. The client devices may provide their location measurement report (LMR) feedback and geo-position estimation to the network. The client devices-provided data, along with the AP-to-AP matrices, may be returned to a location server. The location server can use the data to refine the accuracy of the AP-to-AP graph and ascertain the most probable geo-position of the APs.
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5.发明公开公开(公告)号：US20240072828A1
公开(公告)日：2024-02-29
申请号：US17822811
申请日：2022-08-29
Applicant: Cisco Technology, Inc.
Inventor： Sivadeep Reddy Kalavakuru , Ardalan Alizadeh , John Martin Blosco , Peiman Amini , Clark Carty
Abstract: Improved Radio Frequency (RF) performance by optimizing temperature may be provided. A plurality of heatmaps may be created associating a plurality of component heat characteristics, of a plurality of components of a device, with a plurality of pre-defined performance trade-off states. Next, a shortest path through the plurality of pre-defined performance trade-off states may be determined. The device may then be placed in successive ones of the plurality of pre-defined performance trade-off states according to the determined shortest path until a Transmit (TX) performance target is met.
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Patent Agency Ranking
公开(公告)号：US20250106808A1
公开(公告)日：2025-03-27
申请号：US18429229
申请日：2024-01-31
Applicant: Cisco Technology, Inc.
Inventor： David Maluf , Peiman Amini , Jerome Henry , Pradeep K. Kathail , Matthew S. MacPherson , Laurent Alexandre Pierrugues
Abstract: Described herein are devices, systems, methods, and processes for determining the geo-positions of access points (APs) in a wireless network. The techniques involve utilizing geo-positioning data including global navigation satellite system (GNSS) measurements, wireless local area network (WLAN) signal measurements, air pressure measurements, preexisting knowledge, or any combination thereof. The GNSS measurements may include pseudo range measurements. The WLAN signal measurements can include time of arrival (ToA), channel state information (CSI), and/or received signal strength indicator (RSSI) measurements. The geo-position of each AP is calculated by applying Bayes' theorem to all available geo-positioning data and selecting the geo-position hypothesis with the highest probability. The geo-positions of the APs can be updated when a new measurement is obtained. The techniques can handle diverse AP deployments including heterogeneous APs with varying sensor capabilities.
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公开(公告)号：US20250102683A1
公开(公告)日：2025-03-27
申请号：US18475839
申请日：2023-09-27
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Peiman Amini , Ardalan Alizadeh
Abstract: Devices, systems, methods, and processes for calibrating clock signals of network devices are described herein. A device can initiate a ranging procedure with a reference device for synchronizing a clock signal of the device. The ranging procedure may utilize Fine Time Measurement (FTM), Ultra-Wide band (UWB), or similar protocols. The device can also synchronize the clock signal based on detection of ambient interference events. The device may also receive Global Navigation Satellite System (GNSS) data from a satellite and determine a pseudo range for the corresponding satellite based on the synchronized clock signal. The device may further transmit the GNSS data to a location engine. The location engine may aggregate the GNSS data received from a plurality of devices and determine a geolocation of the plurality of devices based on the aggregated GNSS data.
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公开(公告)号：US20250097896A1
公开(公告)日：2025-03-20
申请号：US18469761
申请日：2023-09-19
Applicant: Cisco Technology, Inc.
Inventor： Jerome Henry , Ather Kanak , Ardalan Alizadeh , Joel Aller , Peiman Amini
IPC: H04W64/00 , H04B17/318 , H04W24/08
Abstract: Devices, systems, methods, and processes for detecting anomalous movements within network devices are described herein. Certain movements within networks devices are predictable and negligible. However, other movements may indicate a larger problem with the network, or network devices, especially when the network devices (e.g., access points) are within a stationary deployment. For example, a sudden movement of a network device may indicate that it has fallen, been moved, or is under threat of a physical attack. Many network devices are being deployed with various environmental sensors. These sensors can be utilized to detect movement of the network device. This can be done by evaluating the received signal strength indicator levels as well as the output of the environmental sensor. If an anomalous movement is detected, preventative actions can be taken such as rebooting or limiting access. This can be done on the network device or by a centralized management system.
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公开(公告)号：US20250085441A1
公开(公告)日：2025-03-13
申请号：US18466659
申请日：2023-09-13
Applicant: Cisco Technology, Inc.
Inventor： Peiman Amini , Ardalan Alizadeh , Jerome Henry , Arya Fallahi , Navid Reyhanian
IPC: G01S19/46
Abstract: Described herein are devices, systems, methods, and processes for estimating the geolocation of network devices by jointly utilizing pseudorange measurements from global navigation satellite system (GNSS) satellites and terrestrial-based ranging measurements between network devices. Each network device is equipped with a GNSS receiver that collects pseudorange data from each satellite link at time intervals. Terrestrial-based ranging measurements between network devices can also be collected. The receiver clock error can be accounted for at least in part by over-the-air time synchronization of network devices. To mitigate the impact of multipath and improve accuracy, pseudorange measurements with less than satisfactory quality metrics can be filtered out. In some embodiments, the geolocation of anchor network devices can be estimated with high accuracy first, and then the rest of the non-anchor network devices may be localized in a second-stage localization process.
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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.
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