公开(公告)号：US20060077041A1

公开(公告)日：2006-04-13

申请号：US11219357

申请日：2005-09-02

申请人： Joseph Chan ,  Nikola Cargonja ,  James Eagleson ,  Arthur Anderson ,  Timothy Brand ,  Ravindra Rajapakse

发明人： Joseph Chan ,  Nikola Cargonja ,  James Eagleson ,  Arthur Anderson ,  Timothy Brand ,  Ravindra Rajapakse

IPC分类号： H04Q5/22 ,  G08B1/08

CPC分类号： G06K17/0022 ,  G01S5/0009 ,  G01S5/02 ,  G01S2205/002 ,  G06F19/00 ,  G06K2017/0045

摘要： An apparatus (10, 240, 300) includes a signpost (11, 241-256, 322, 612, 623, 626-628, 652, 661, 682, 686, 703) which transmits signpost signals (24) that are received by a tag (12, 271-275, 301-316, 395-397, 616-618, 641-643, 653, 656-657, 662-664, 679, 708, 711). The tag in turn transmits radio frequency beacon signals (72) which are received by a reader (13, 261, 319, 521-530). The tag can vary the duration of the beacon signals, for example in dependence on whether it is currently receiving a signpost signal. Further, the tag can dynamically vary the transmission rate and/or transmission power of the beacon signals, for example following receipt of a signpost signal. Varying these parameters can facilitate compliance with governmental regulations.

摘要翻译： 一种装置（10,240,300）包括一个路标（11,241-256,362,612,623,626,628,652,661,682,686,703），该路标传送路标信号（24），路标信号（24）由 标签（12,271-275,301,316,345-397,616-618,641-63，653,656-657,662-664,679,708,711）。 标签又传送由读取器（13,261,319,521-530）接收的射频信标信号（72）。 标签可以改变信标信号的持续时间，例如根据其是否正在接收路标信号。 此外，标签可以动态地改变信标信号的传输速率和/或传输功率，例如在接收到路标信号之后。 改变这些参数可以促进遵守政府法规。