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Extended efficient usage of emergency services keys

  • US 8,208,605 B2
  • Filed: 11/27/2007
  • Issued: 06/26/2012
  • Est. Priority Date: 05/04/2006
  • Status: Active Grant
First Claim
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1. A method of recyclably using an emergency services key selected from among a limited size pool, comprising:

  • selecting an emergency services key from a limited size pool having an older timestamp associated with said emergency services key from among those in said pool, in an event that no emergency services key in said pool meets a first attempt selecting criteria; and

    resetting a timestamp associated with said selected emergency services key to a current time plus a value of a guard timer;

    wherein selection of said emergency services key is assured to be available when selected.

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