The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1999
Filed:
Nov. 24, 1997
Hwan-Woo Kwon, Incheon, KR;
Daewoo Telecom, Ltd., Incheon, KR;
Abstract
An active/stand-by determination method for use in a duplicated system, wherein two elements, one given a priority and the other not given a priority, in the duplicated system operate in an active mode and a stand-by mode alternatively by using an X.sub.-- ACTIVE signal, a S.sub.-- ACTIVE signal, a STATUS signal for each element and a SIDE signal, the method comprising the steps of: a) setting both the elements in the stand-by mode upon power-on; b) checking the X.sub.-- ACTIVE signal and the STATUS signal at both the elements; c) entering into the active mode if it is determined at the step b) that both the X.sub.-- ACTIVE signal and the STATUS signal are 'high'; d) remaining in the stand-by mode if it is determined at the step b) that at least one of the X.sub.-- ACTIVE signal and the STATUS signal is 'low'; e) checking if both the elements are in the active mode; f) checking the SIDE signal if it is determined that both the elements are in the active mode at the step e); and g) moving an element given a priority into the stand-by mode if the SIDE signal is determined to be 'low' at the step f).