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公开(公告)号：US20160094954A1
公开(公告)日：2016-03-31
申请号：US14502746
申请日：2014-09-30
Applicant: Apple Inc.
Inventor： David Benjamin Millman , Johan Olav Bergerengen , Robert Mayor , Brian Stephen Smith
CPC classification number: H04W64/00 , G01S5/02 , G01S5/0252 , G01S5/0263 , H04L67/12 , H04W4/027 , H04W4/80 , H04W24/10 , H04W64/006
Abstract: Methods, program products, and systems for using multiple sensors to determine a location fingerprint are described. A sampling device can measure RF signals detected at a train station of a transit system or a route of the transit system. The sampling device, or a location server receiving the measurements, can filter RF signal measurements using one or more readings from sensors coupled to the sampling device and that are different from RF receivers. The readings can be taken concurrently with the RF signal measurements. These readings, designated as motion cues, can include motion sensor readings, barometer readings, or magnetometer readings. Using the motion cues, the sampling device or location server can distinguish different platforms of a station of the transit system and different levels of the station, or filter out RF signal measurements that may have been inaccurate, e.g., as caused by disturbances from a train entering or leaving a station.
Abstract translation: 描述了使用多个传感器来确定位置指纹的方法，程序产品和系统。 采样设备可以测量在交通系统的火车站或者交通系统的路线上检测到的RF信号。 采样设备或接收测量的位置服务器可以使用耦合到采样设备并且与RF接收器不同的传感器的一个或多个读数来过滤RF信号测量。 读数可以与RF信号测量同时进行。 指定为运动线索的这些读数可以包括运动传感器读数，气压计读数或磁力计读数。 使用运动提示，采样设备或定位服务器可以区分交通系统的车站的不同平台和车站的不同等级，或者过滤出可能不准确的RF信号测量，例如由于列车的干扰引起的 进出车站。
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公开(公告)号：US20160091593A1
公开(公告)日：2016-03-31
申请号：US14502653
申请日：2014-09-30
Applicant: Apple Inc.
Inventor： David Benjamin Millman , Johan Olav Bergerengen , Robert Mayor , Brian Stephen Smith
CPC classification number: B61L25/025 , B61L15/0027 , B61L27/0005 , G01C21/20 , G01S5/0252 , H04W4/02 , H04W4/046 , H04W64/00
Abstract: Methods, program products, and systems for building a location fingerprint database for a transit system are described. The transit system can be a subway system including underground train stations and routes where location determination using GPS signals is difficult or impossible. A sampling device can measure signals, e.g., radio frequency (RF) signals detected at the stations or on the routes. A location server can construct a location fingerprint for each of the stations and the routes. Each location fingerprint can represent expected signal measurements by a user device if the user device is located at the respective station or route. The location server can provide the location fingerprint to a user device for the user device to determine a location of the user device within the station or on the route.
Abstract translation: 描述了用于构建运输系统的位置指纹数据库的方法，程序产品和系统。 交通系统可以是包括地下火车站和使用GPS信号的位置确定困难或不可能的路线的地铁系统。 采样设备可以测量信号，例如在站点或路线上检测到的射频（RF）信号。 位置服务器可以为每个站点和路线构建位置指纹。 如果用户设备位于相应的站或路线，则每个位置指纹可以表示用户设备的预期信号测量。 位置服务器可以向用户设备提供位置指纹，以便用户设备确定站内或路线上的用户设备的位置。
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公开(公告)号：US11582576B2
公开(公告)日：2023-02-14
申请号：US16147484
申请日：2018-09-28
Applicant: Apple Inc.
Inventor： Jahshan Bhatti , Brian Stephen Smith , Wei Kong
Abstract: Embodiments are disclosed for a feature-based simultaneous localization and mapping (SLAM) system and method that generates radio maps for environments that are not accessible for surveying. More accurate radio maps are generated for an unsurveyed environment by determining a best estimate of a mobile device state from harvested traced data that maximizes a posterior probability of the mobile device state given measurements, landmarks and loop constraints.
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Patent Agency Ranking
公开(公告)号：US20210044986A1
公开(公告)日：2021-02-11
申请号：US17071492
申请日：2020-10-15
Applicant: Apple Inc.
Inventor： Margaret Tam , David Benjamin Millman , Brian Stephen Smith , Benjamin A. Detwiler
Abstract: An example method includes obtaining a plurality of data items. Each data item includes an indication of a particular location, an indication that a wireless signal from a first access point was observed at that location, and an indication of a time at which the wireless signal from the first access point was observed at that location. The method also includes determining a locational stability of the first access point based on the data items. Determining the locational stability of the first access point includes clustering the plurality of data items into one or more clusters based on the locations indicated in the plurality of data items, determining whether the N most recent data items are associated with a common cluster, and determining whether a time span between the N most recent data items exceeds a threshold period of time.
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公开(公告)号：US10757671B2
公开(公告)日：2020-08-25
申请号：US14502746
申请日：2014-09-30
Applicant: Apple Inc.
Inventor： David Benjamin Millman , Johan Olav Bergerengen , Robert Mayor , Brian Stephen Smith
Abstract: Methods, program products, and systems for using multiple sensors to determine a location fingerprint are described. A sampling device can measure RF signals detected at a train station of a transit system or a route of the transit system. The sampling device, or a location server receiving the measurements, can filter RF signal measurements using one or more readings from sensors coupled to the sampling device and that are different from RF receivers. The readings can be taken concurrently with the RF signal measurements. These readings, designated as motion cues, can include motion sensor readings, barometer readings, or magnetometer readings. Using the motion cues, the sampling device or location server can distinguish different platforms of a station of the transit system and different levels of the station, or filter out RF signal measurements that may have been inaccurate, e.g., as caused by disturbances from a train entering or leaving a station.
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公开(公告)号：US10698073B2
公开(公告)日：2020-06-30
申请号：US14292631
申请日：2014-05-30
Applicant: Apple Inc.
Inventor： Brian Stephen Smith , Robert Mayor , Ronald K. Huang , Lukas M. Marti
IPC: G01S5/02
Abstract: Collocated access point (AP) harvest data is combined with accurate location-tagged harvest data to improve access point location estimates and to estimate the location of access points that could not be previously estimated.
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公开(公告)号：US20180348333A1
公开(公告)日：2018-12-06
申请号：US15710515
申请日：2017-09-20
Applicant: Apple Inc.
Inventor： Jahshan Bhatti , David Benjamin Millman , Brian Stephen Smith , Jasvinder Singh
Abstract: A method comprising: receiving a radio map of an indoor venue using survey data collected by a survey device positioned throughout the venue, the radio map including a boundary; receiving harvest data from a mobile device, wherein at least some of the harvest data are obtained by the mobile device while the mobile device is positioned at locations that are outside of the boundary; determining, based on the harvest data, a trajectory of the mobile device, wherein at least some of the trajectory resides outside of the boundary; identifying one or more locations on or proximate to the trajectory; and extending the radio map using the survey data and the one or more identified locations, wherein the extended radio map is defined at least in part by an extension of the boundary to encompass the one or more identified locations.
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公开(公告)号：US20160094950A1
公开(公告)日：2016-03-31
申请号：US14502982
申请日：2014-09-30
Applicant: Apple Inc.
Inventor： David Benjamin Millman , Johan Olav Bergerengen , Robert Mayor , Brian Stephen Smith
CPC classification number: H04W4/026 , B61L25/025 , B61L2205/04 , G01S5/0252 , G01S5/0278 , G06N7/005 , H04W4/027 , H04W4/029
Abstract: Methods, program products, and systems for using a location fingerprint database to determine a location of a mobile device are described. A mobile device can use location fingerprint data received from a server to determine a location of the mobile device at the venue. The mobile device can obtain, from a sensor of the mobile device, a vector of sensor readings, each sensor reading can measure an environment variable, e.g., a signal received by the sensor from a signal source. The mobile device can perform a statistical match between the vector and the location fingerprint data. The mobile device can then estimate a current location of the mobile device based on the statistical match.
Abstract translation: 描述了使用位置指纹数据库来确定移动设备的位置的方法，程序产品和系统。 移动设备可以使用从服务器接收的位置指纹数据来确定移动设备在场地的位置。 移动设备可以从移动设备的传感器获得传感器读数的向量，每个传感器读数可以测量环境变量，例如传感器从信号源接收到的信号。 移动设备可以执行向量和位置指纹数据之间的统计匹配。 然后，移动设备可以基于统计匹配来估计移动设备的当前位置。
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