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    Wireless-based localization using a zonal framework
    3.
    发明授权
    Wireless-based localization using a zonal framework 有权

    公开(公告)号：US09674656B2

    公开(公告)日：2017-06-06

    申请号：US14185768

    申请日：2014-02-20

    申请人： Microsoft Technology Licensing, LLC

    发明人： Liqun Li ,  Guobin Shen ,  Chunshui Zhao ,  Feng Zhao

    IPC分类号： H04W24/00 ,  H04W4/02 ,  H04W64/00

    CPC分类号： H04W4/021 ,  H04W4/029 ,  H04W64/00 ,  H04W84/02

    摘要： Disclosed herein are techniques and systems for performing wireless-based localization using a zonal framework. An area (i.e., surface or space) may be partitioned into multiple zones, and one or more signal propagation models for one or more wireless access points (APs) may be generated for each zone. The result is a set of zonal signal propagation models that allow for improved model fitness on a per-zone basis. A process includes receiving a location query associated with a wireless communication device, selecting a target zone among multiple available zones of an area, and estimating a location of the wireless communication device based at least in part on one of a signal propagation model associated with the target zone or a fingerprint-based localization. The signal propagation model associated with the target zone may be generated based on training samples observed exclusively within the target zone.

    Indoor location-finding using magnetic field anomalies
    5.
    发明授权
    Indoor location-finding using magnetic field anomalies 有权
    使用磁场异常进行室内定位

    公开(公告)号：US09326103B2

    公开(公告)日：2016-04-26

    申请号：US13941002

    申请日：2013-07-12

    申请人： Microsoft Technology Licensing, LLC

    发明人： Guobin (Jacky) Shen ,  Chunshui Zhao ,  Feng Zhao

    IPC分类号： H04W4/04 ,  G01C21/00 ,  G01C21/08 ,  G01C21/20

    CPC分类号： H04W4/04 ,  G01C21/005 ,  G01C21/08 ,  G01C21/206

    摘要： Techniques for indoor location-finding are described herein. Inside buildings, anomalies in the Earth's magnetic field may be caused by the buildings' structures. These anomalies tend to be location specific and temporally stable. Accordingly, a database or map may be constructed of field strength measurements, and made available to clients, either online (e.g., through cloud services) or offline. As a user carrying a portable device walks within a building, magnetic field measurements may be made. The measurements may be configured in as vectors and compared to the database. A specific location may be indicated by anomaly information seen in both the vector(s) and database. Optionally, techniques may be combined with a particle filter that may be operated step-by-step as the user moves within the building. In another option, fusion with Wi-Fi signals may be performed, such as with a two-pass bidirectional particle filtering.

    摘要翻译： 本文描述了用于室内定位的技术。 在建筑物内，地球磁场的异常可能是建筑物的结构造成的。 这些异常倾向于位置特定和时间上的稳定。 因此，数据库或地图可以由场强测量构成，并且可以在线（例如，通过云服务）或离线使得客户端可用。 当携带便携式设备的用户在建筑物内行进时，可以进行磁场测量。 测量可以配置为向量并与数据库进行比较。 特定位置可以由向量和数据库中的异常信息指示。 可选地，技术可以与粒子滤波器组合，粒子滤波器可随着用户在建筑物内移动而逐步运行。 在另一选择中，可以执行与Wi-Fi信号的融合，例如通过双向双向粒子滤波。