Title:
稼働/待機切換方法、稼働/待機決定方法
Document Type and Number:
Japanese Patent JP4569024
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method that can conduct switchover from a standby system to an active system and determination of active system/standby system stably and swiftly, with a simpler program. SOLUTION: In addition to a state definition representing active system/ standby system, a state of 'active operation preparation token waiting' 35 and a state of 'active operation preparation token holding' 36, which represent a non-stationary state (intermediate state), are defined. For example, if a standby system at a certain node detects that an active system does not transmit a token due to a failure, etc., and the next node reissues the token, the standby system transits to the 'active operation preparation token waiting' 35 state first, then it transits to the 'active operation preparation token holding' 36 state. The standby system transits to the active system (a state of 'active system token waiting') 31 state, if the active system does not transmit a token before the time is up (even after a prescribed time is passed).
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Inventors:
Munakata Masaro
Application Number:
JP2001093278A
Publication Date:
October 27, 2010
Filing Date:
March 28, 2001
Export Citation:
Assignee:
Fuji Electric Systems Co., Ltd.
International Classes:
G06F11/20; H04L12/28; G05B9/03; H04L12/40
Domestic Patent References:
| JP3169139A | ||||
| JP7023079A | ||||
| JP2309839A | ||||
| JP8008975A | ||||
| JP8172449A |
Attorney, Agent or Firm:
Yoshiyuki Osuga
Masaharu Shinobe
Masaharu Shinobe