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Wake-up detection method and apparatus embodying the same

  • US 7,199,783 B2
  • Filed: 02/07/2003
  • Issued: 04/03/2007
  • Est. Priority Date: 02/07/2003
  • Status: Active Grant
First Claim
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1. a method of operating an input apparatus adapted to communicate with a computer system, the method comprising:

  • deactivating portions of the input apparatus following a predetermined period of inactivity, thus entering sleep mode;

    monitoring signals from the computer system during the sleep mode, wherein said step of monitoring comprises periodically listening for a query signal from the computer system according to a monitoring cycle interval, wherein the monitoring cycle interval is adaptively changed during the sleep mode by implementation of an exponential back-off technique to vary the monitoring cycle interval over time during the sleep mode, implementing an exponential back-off technique to vary the monitoring cycle interval over time during the sleep mode; and

    activating the input apparatus upon detection of a query from the computer system.

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