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Data transferring method and object tracking system using the same

  • US 8,880,584 B2
  • Filed: 12/07/2007
  • Issued: 11/04/2014
  • Est. Priority Date: 12/07/2007
  • Status: Active Grant
First Claim
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1. An object tracking system for monitoring a plurality of objects, comprising:

  • a plurality of RFID tags each physically coupled with a corresponding object, that send out wireless signals indicating the locations of the objects;

    at least one RFID reader that receives the wireless signals generated by the RFID tags and converts the signals into object-tracked data indicating the locations of the objects; and

    a data transferring system including;

    a server that accesses the object-tracked data generated by the RFID reader and that generates messages based on a comparison of currently obtained object-tracked data and previously obtained object-tracked data;

    a plurality of clients that receive the messages generated by the server, the server configured to monitor the locations of each of the objects in real time based on the messages where each of the plurality of objects and the server must send location information to each client of the plurality of clients within a time interval defined by a refresh time of the system; and

    a microcontroller having data transferring software for transferring the data from the server to the clients, wherein the microcontroller has data transferring software that generates a plurality of event trigger thread instances, each of the instances being in communication with a corresponding one of the clients, and sends the messages from the server to the clients through remote events by using the corresponding event trigger thread instance to control the communication between the server and the client but only for those objects whose location has changed.

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