Method and apparatus for determining range information of a node in a wireless system
    1.
    发明授权
    Method and apparatus for determining range information of a node in a wireless system 有权
    用于确定无线系统中的节点的范围信息的方法和装置

    公开(公告)号:US08400305B2

    公开(公告)日:2013-03-19

    申请号:US12577277

    申请日:2009-10-12

    IPC分类号: G08B13/14

    摘要: A method and apparatus for determining a range within a wireless communication system is provided herein. The range information can then be used to locate a node (e.g., an asset tag). During operation, the minimum transmission power of a source transceiver (e.g., an RFID reader) that enables a tag to be detected will be used to indicate distance. Changes in transmit power will be used to indicate relative changes in distance to a particular node. The reader will be configured to always operate at a transmission power that will result in a certain percentage (e.g., 50%) detection rate for a target transceiver (e.g., an RFID asset tag). As the reader moves closer to the tag, the minimum detection power will decrease; as it moves farther from the tag, the minimum detection power will increase. This information is displayed to give a general change in range information between the RFID reader and the asset tag (e.g., increasing range or decreasing range). An individual will be able to easily locate the asset tag by using the displayed information.

    摘要翻译: 本文提供了一种用于确定无线通信系统内的范围的方法和装置。 然后可以使用范围信息来定位节点(例如,资产标签)。 在操作期间,将使用能够检测标签的源收发器(例如,RFID读取器)的最小发送功率来指示距离。 发射功率的变化将用于指示到特定节点的距离的相对变化。 读取器将被配置为总是以将导致目标收发器(例如,RFID资产标签)的一定百分比(例如,50%)检测率的传输功率操作。 当读者移动到标签附近时,最小检测力会降低; 当它从标签上移动得更远时,最小检测功率将会增加。 该信息被显示以给出RFID读取器和资产标签之间的范围信息的一般变化(例如,增加范围或减小的范围)。 个人将能够使用显示的信息轻松找到资产标签。