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Method and system for providing an energy efficient exchange of information in wireless networks

  • US 7,536,194 B2
  • Filed: 09/30/2005
  • Issued: 05/19/2009
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A method of synchronizing a first device and a second device, comprising:

  • generating a first tone by the first device, the first tone one of (a) including an identity of the second device and (b) generated at a predefined time;

    receiving the first tone by the second device;

    setting a clock of the second device based on the received first tone;

    sending an acknowledgment by the second device to the first device;

    (i) waiting for a predefined period of time by the second device for an indication of acknowledged receipt of the acknowledgement;

    (ii) waking up in a subsequent supervision time slot to receive the indication of acknowledged receipt of the acknowledgement if the indication is not received within the predefined period of time;

    repeating steps (i) and (ii) for a predefined number of times; and

    transmitting a poll by the second device to the first device if the indication of acknowledged receipt is not received.

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