| 摘要 |
<p>The invention provides an information transmission method using a satellite for transmitting information on an object comprising an RFID tag to at least one portable device, said method comprising: - said satellite at time intervals sending a scan signal and waiting for a response signal from said RFID tag, said response signal comprising an RFID identifier; - said satellite retrieving said RFID identifier from said response signal, and - said satellite, in response to said response signal, during a subsequent time interval periodically wirelessly broadcasts one or more beacon signals, each beacon signal comprising data selected from information regarding objects coupled to said RFID tags from which a response signal is received, said RFID identifier of said response signal, properties of said RFID tags of said response signal, an indication of a distance of said RFID tags of said response signal from said satellite, and a combination thereof.</p> |
