| US 7,477,575 B2 | ||
| Redundant timer system and method | ||
| John Gallant, Plano, Tex. (US) | ||
| Assigned to Verisign, Inc., Mountain View, Calif. (US) | ||
| Filed on Sep. 23, 2005, as Appl. No. 11/233,058. | ||
| Prior Publication US 2007/0070820 A1, Mar. 29, 2007 | ||
| Int. Cl. G04F 8/00 (2006.01); G06F 1/04 (2006.01) | ||
| U.S. Cl. 368—108 [368/46] | 22 Claims |
| 1. A method of backup timing comprising:
a. defining one or more time increments ei, i an integer from 1 to N;
b. setting a timer CT0 to count a time T0, wherein setting the timer CT0 is in response to an initiation of an application running on a device external to the timer CT0;
c. setting one or more timers CTi, i the integer from 1 to N, to count a time Ti=Ti-1+ei;
d. after the earliest time that a timer CTj completes counting its time, j being an integer from 0 to N,
i. causing an event E that includes causing the application to change an operational state; and
ii. causing an event F with regard to at least one timer in a group of timers CTk, k being an integer from j+1 to N.
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