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1. 发明授权

US11758508B2 Access Point (AP) placement using Fine Time Measurement (FTM) 有权
公开(公告)号：US11758508B2
公开(公告)日：2023-09-12
申请号：US17833824
申请日：2022-06-06
申请人： Cisco Technology, Inc.
发明人： Matthew Aaron Silverman , Xu Zhang , Santosh Ghanshyam Pandey , Jerome Henry , Paul J. Stager
IPC分类号： H04W64/00 , H04W16/28 , G01S13/76
CPC分类号： H04W64/003 , G01S13/762 , H04W16/28
摘要： Access Point (AP) placement using Fine Time Measurement (FTM) may be provided. First, a plurality of Time-of-Flight (ToF) values between a first service end point and a second service end point may be determined. Each one of the plurality of ToF values may be derived from packets transmitted via different beamforming vector patterns at the first service end point and the second service end point. Then a minimum ToF value of the plurality of ToF values may be determined. Next, a distance between the first service end point and the second service end point may be determined based on the minimum ToF value.

2. 发明申请

US20220231903A1 THRESHOLD SELECTION FOR KPI CANDIDACY IN ROOT CAUSE ANALYSIS OF NETWORK ISSUES 有权
公开(公告)号：US20220231903A1
公开(公告)日：2022-07-21
申请号：US17716913
申请日：2022-04-08
申请人： Cisco Technology, Inc.
发明人： Sajjit Thampy , Santosh Ghanshyam Pandey , Jean-Philippe Vasseur
IPC分类号： H04L41/0631 , H04L43/067 , H04L43/04 , H04W24/04 , H04B17/309 , H04L43/0823
摘要： In one embodiment, a network assurance service that monitors a network maps time series of values of key performance indicator (KPIs) measured from the network to lists of unique values from the time series. The service sets a target alarm rate for anomaly detection alarms raised by the network assurance service. The service uses an optimization function to identify a set of thresholds for the KPIs. The optimization function is based on: a comparison between the target alarm rate and a fraction of network issues flagged by the service as outliers, KPI thresholds selected based on the lists of unique values from the time series, and a number of thresholds that the KPIs must cross for the service to raise an alarm. The service raises an anomaly detection alarm for the monitored network based on the identified set of thresholds for the KPIs.

3. 发明授权

US11074710B2 Image-based framework for improving location estimate accuracy in indoor positioning systems 有权
公开(公告)号：US11074710B2
公开(公告)日：2021-07-27
申请号：US16724751
申请日：2019-12-23
申请人： Cisco Technology, Inc.
发明人： Huy Phuong Tran , Xu Zhang , Santosh Ghanshyam Pandey , Hugo Latapie , Abhishek Mukherji , Enzo Fenoglio
IPC分类号： G06T7/70 , G06K9/46 , G01S5/02 , H04W4/33
摘要： In one embodiment, a service obtains spatial information regarding a physical area. The service estimates locations of a device within the physical area over time, based on wireless signals sent by the device. The service generates a set of images based on the spatial information regarding the physical area and on the estimated locations of the device within the physical area over time. The service updates an estimated location of the device by inputting the generated set of images to a machine learning model trained to minimize a location estimation error.

4. 发明授权

US10863379B2 BSS color assignment in infrastructure WLANS 有权
公开(公告)号：US10863379B2
公开(公告)日：2020-12-08
申请号：US16505105
申请日：2019-07-08
申请人： Cisco Technology, Inc.
发明人： Santosh Ghanshyam Pandey , Pooya Monajemi , Vishal Desai
IPC分类号： H04L12/26 , H04W28/02 , H04W24/02 , H04W84/12
摘要： In one embodiment, a basic service set (BSS) color assignment apparatus includes a processor, and a memory to store data used by the processor, wherein the processor is operative to calculate, for each one BSS color of a plurality of BSS colors, a BSS color assignment metric at least based on use of the one BSS color in at least one neighboring BSS neighboring a BSS of an access point in an infrastructure wireless local area network (WLAN), yielding a plurality of BSS color assignment metrics for the BSS of the access point, select one of the plurality of BSS color assignment metrics associated with an optimal choice BSS color of the plurality of BSS colors for the BSS of the access point and assign the optimal choice BSS color to the BSS of the access point.

5. 发明授权

US10542517B1 Characterizing movement behaviors of wireless nodes in a network 有权
公开(公告)号：US10542517B1
公开(公告)日：2020-01-21
申请号：US16539359
申请日：2019-08-13
申请人： Cisco Technology, Inc.
发明人： Abhishek Mukherji , Santosh Ghanshyam Pandey , Abhishek Bhattacharyya , Vinay Raghuram , Balaji Gurumurthy , Prasad Walawalkar
IPC分类号： H04W24/00 , H04W64/00 , H04L12/24 , H04W4/33 , H04W4/029
摘要： In one embodiment, a device receives location estimates for a wireless node in a network, each location estimate having an associated timestamp. The device applies hierarchical clustering to the received location estimates and their associated timestamps, to identify locations and points in time in which the wireless node was stationary. The device performs sequence modeling on the identified locations and points in time in which the wireless node was stationary, to form a sequence of locations and associated time periods in which the wireless node was stationary. The device associates the wireless node with a behavioral profile based on the sequence of locations and associated time periods in which the wireless node. The device generates, based in part on the behavioral profile for the wireless node, a predictive model that predicts a location of the wireless node at a particular point in time.

6. 发明授权

US10524272B2 Resource allocation for OFDMA with preservation of wireless location accuracy 有权
公开(公告)号：US10524272B2
公开(公告)日：2019-12-31
申请号：US15865877
申请日：2018-01-09
申请人： Cisco Technology, Inc.
发明人： Matt Silverman , Zhigang Gao , Oscar Bejarano Chavez , John Matthew Swartz , Santosh Ghanshyam Pandey
IPC分类号： H04W24/10 , H04W72/08 , H04W48/00 , H04B7/06
摘要： In one embodiment, a control device associated with a wireless network of a given location determines a reference quality of location readings between access points and client devices based on using substantially all of an available wireless communication bandwidth. The control device may then determine channel state information (CSI) between the client devices and access points for each orthogonal frequency-division multiple access (OFDMA) resource unit (RU), and selects a subset of RUs for allocation to each respective client device, based on the subset of RUs allocated to each respective client device i) surpassing a determined threshold of certain parameters of the CSI, while also ii) providing a minimum quality of a location reading based on using only the subset of RUs as compared to the reference quality of location readings. The control device may then allocate the selected subset of RUs to each respective client device for location-preserving OFDMA-signaling-based communication.

7. 发明申请

US20190238421A1 DETECTING TRANSIENT VS. PERPETUAL NETWORK BEHAVIORAL PATTERNS USING MACHINE LEARNING 审中-公开
公开(公告)号：US20190238421A1
公开(公告)日：2019-08-01
申请号：US15880600
申请日：2018-01-26
申请人： Cisco Technology, Inc.
发明人： Vinay Kumar Kolar , Jean-Philippe Vasseur , Vikram Kumaran , Santosh Ghanshyam Pandey
IPC分类号： H04L12/24 , H04L12/26 , G06N99/00
摘要： In one embodiment, a network assurance service that monitors a network detects a pattern of network measurements from the network that are associated with a particular network problem. The network assurance service tracks characteristics of the detected pattern over time. The network assurance service uses the tracked characteristics of the detected pattern over time as input to a machine learning-based pattern analyzer. The pattern analyzer is configured to determine whether the detected pattern is a perpetual or transient pattern in the network, and the pattern analyzer is further configured to detect anomalies in the characteristics of the pattern. The network assurance service initiates a change to the network based on an output of the machine learning-based pattern analyzer.

8. 发明申请

US20150126215A1 DETECTING INCORRECTLY PLACED ACCESS POINTS 有权
标题翻译：检测不正确的接入点
公开(公告)号：US20150126215A1
公开(公告)日：2015-05-07
申请号：US14072851
申请日：2013-11-06
申请人： Cisco Technology, Inc.
发明人： Santosh Ghanshyam Pandey
IPC分类号： G01S5/02 , H04W64/00
CPC分类号： G01S5/0252 , G01S5/021 , G01S5/0242 , H04W64/003
摘要： Embodiments provide techniques for detecting access points on a position map, particularly incorrectly placed access points. For each access point in a plurality of access points, a subset of the plurality of access points that neighbor the access point are identified. Embodiments estimate a location of the access point, based on a respective indication of signal strength from each neighboring access point in the subset of access points and a respective position of each of the neighboring access points in position map. A difference between a recorded position of the access point in the position map and the estimated location of the access point is calculated. Embodiments then determine that the position within the position map for a first one of the plurality of access points is incorrect, based on the determined difference for the first access point.
摘要翻译：实施例提供了用于检测位置图上的接入点的技术，特别是不正确放置的接入点。对于多个接入点中的每个接入点，识别与接入点相邻的多个接入点的子集。实施例基于来自接入点子集中的每个相邻接入点的信号强度的相应指示和位置图中的每个相邻接入点的相应位置估计接入点的位置。计算位置图中的接入点的记录位置与接入点的估计位置之间的差异。然后，实施例基于所确定的第一接入点的差异，确定位置图中位于多个接入点中的第一接入点的位置是不正确的。

9. 发明申请

US20220377699A1 ACCESS POINT (AP) PLACEMENT USING FINE TIME MEASUREMENT (FTM) 有权
公开(公告)号：US20220377699A1
公开(公告)日：2022-11-24
申请号：US17833824
申请日：2022-06-06
申请人： Cisco Technology, Inc.
发明人： Matthew Aaron Silverman , Xu Zhang , Santosh Ghanshyam Pandey , Jerome Henry , Paul J. Stager
IPC分类号： H04W64/00 , G01S13/76 , H04W16/28
摘要： Access Point (AP) placement using Fine Time Measurement (FTM) may be provided. First, a plurality of Time-of-Flight (ToF) values between a first service end point and a second service end point may be determined. Each one of the plurality of ToF values may be derived from packets transmitted via different beamforming vector patterns at the first service end point and the second service end point. Then a minimum ToF value of the plurality of ToF values may be determined. Next, a distance between the first service end point and the second service end point may be determined based on the minimum ToF value.

10. 发明授权

US11412476B2 Offloading location computation from cloud to access point (AP) with projection on base phase vectors 有权
公开(公告)号：US11412476B2
公开(公告)日：2022-08-09
申请号：US16938551
申请日：2020-07-24
申请人： Cisco Technology, Inc.
发明人： Xu Zhang , Paul J. Stager , Santosh Ghanshyam Pandey , Matthew Aaron Silverman , Abhishek Mukherji
IPC分类号： H04W64/00 , H04W8/02 , H04W4/33 , H04B17/382 , H04W4/02 , H04B17/327
摘要： Offloading of location computation from a location server to an access point through the use of projections on base phase vectors may be provided. First, an Access Point (AP) may receive a set of two or more base phase vectors from a location server. Next, the AP may measure a measured phase vector for a first signal from a user device. Then, the AP can determine projection values based on a comparison of the measured phase vector to each base phase vector. From these comparisons, the AP can determine a subset of base phase vectors with the highest projection values. The AP can then send the projection values and the subset of base phase vectors to the location server, wherein the location server determines the device location from these projection values and subset of base phase vectors.

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