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Power-saving method for wireless sensor network

  • US 7,647,078 B2
  • Filed: 03/07/2006
  • Issued: 01/12/2010
  • Est. Priority Date: 03/07/2006
  • Status: Active Grant
First Claim
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1. A method of saving battery power in a wireless communication, the method comprising:

  • initializing a sleep probability upon the device initially being deployed, such that the sleep probability is calculated based on a number of neighboring wireless communication devices and a sleep counter which is updated during each of an active event, an overhearing event, and a periodic inactive event;

    operating an active mode to perform the communication;

    starting an active mode timer;

    operating a sleep mode when there is no packet to transmit or receive before the active mode timer expires;

    overhearing packets addressed to the neighboring wireless communication devices during the sleep mode;

    updating the sleep probability depending on a number of the overheard packets addressed to the neighboring wireless communication devices; and

    determining an exit from the sleep mode on the basis of the updated sleep probability.

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