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Power management in communication devices

  • US 7,281,144 B2
  • Filed: 02/17/2004
  • Issued: 10/09/2007
  • Est. Priority Date: 02/17/2004
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • determining a communications interface power requirement;

    determining a system power requirement excluding said communications interface;

    finding an expected relative delay ratio between entering a power saving mode and not entering said power saving mode wherein finding the expected relative delay comprises;

    determining an expected network latency, L;

    determining a delay, D; and

    wherein the expected relative delay ratio is of one of the forms, L + D L



    and

    D L
    ;

    determining whether or not to enter said power saving mode based on a comparison between said expected relative delay ratio and a function of said interface power requirement and said system power requirement; and

    determining an expected network latency, L, between sending a request and receiving a response; and

    determining an expected delay, D, introduced by entering said power saving mode.

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