Method and system for networking radio tags in a radio frequency identification system

  • US 8,232,868 B2
  • Filed: 10/27/2009
  • Issued: 07/31/2012
  • Est. Priority Date: 07/20/1999
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • receiving, by a receiver of a radio tag, a first signal including a data content on a first frequency, the data content identifying, based on an address, a first device that is separate from the radio tag, wherein the first device transmitted the first signal;

    determining if the first signal further includes a wakeup signal signature, wherein the wakeup signal signature is a digital bit stream;

    transitioning when the first signal is determined to include the wakeup signal signature, a processor of the radio tag from a first power operation mode to a second power operation mode to further process the first signal; and

    transmitting, by a transmitter of the radio tag, a second signal on a second frequency to a second device, the second signal being transmitted by the transmitter in response to the receiver receiving the first signal, the second signal including the address identifying the first device.

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