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    • 3. 发明申请
    • MAPPING LOCATIONS BASED ON RECEIVED SIGNAL STRENGTHS
    • 基于接收信号强度的映射位置
    • US20110260922A1
    • 2011-10-27
    • US12764476
    • 2010-04-21
    • Chuntao ZhangThomas S. BabinTimothy J. CollinsJulius S. GyorfiTom MathewSwee M. Mok
    • Chuntao ZhangThomas S. BabinTimothy J. CollinsJulius S. GyorfiTom MathewSwee M. Mok
    • G01S3/02
    • G01S5/0252G01S11/06H04W64/00
    • Disclosed is a system for updating an RSSI-based map. A scanning devices notes which tags are seen during a scan and measures a “proxy distance” from the scanning device to each tag. When the scan is initiated, the scanning device measures the RSSIs from the local WAPs. The current location of the scanning device is determined by triangulating from the proxy distances of the scanned tags. That location is then correlated with the contemporaneously measured RSSIs. The correlation is used to update the RSSI-based map. In some embodiments, it is not the scanning device that measures the RSSIs. Instead, the WAPs measure the RSSIs from the scanning device whenever the scanning device transmits the results of a scan. In some embodiments, the operator of the mapped environment places scannable tags at fixed locations. Scans of these fixed-location tags are especially useful when determining the current location of the scanning device.
    • 公开了一种用于更新基于RSSI的地图的系统。 扫描设备注意到扫描期间看到哪些标签,并测量从扫描设备到每个标签的“代理距离”。 当扫描开始时,扫描设备测量来自本地WAP的RSSI。 扫描装置的当前位置通过从扫描标签的代理距离三角测量来确定。 然后该位置与同时测量的RSSI相关。 相关性用于更新基于RSSI的地图。 在一些实施例中,不是测量RSSI的扫描设备。 相反,每当扫描设备发送扫描结果时,WAP就会从扫描设备测量RSSI。 在一些实施例中,映射环境的操作者将可扫描标签放置在固定位置。 当确定扫描设备的当前位置时,这些固定位置标签的扫描特别有用。