LAN SWITCHOVER METHOD TO COPE WITH INTERMITTENT FAILURE

LAN SWITCHOVER METHOD TO COPE WITH INTERMITTENT FAILURE

PROBLEM TO BE SOLVED: To prevent system supervision interruption due to incapability of power system status data transmission from a server to a client that arises owing to the use of a faulty LAN when an intermittent failure occurs on one of the duplicated LAN in a power system supervision system o...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: OCHI TSUTOMU, KIKUCHI SATOSHI
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To prevent system supervision interruption due to incapability of power system status data transmission from a server to a client that arises owing to the use of a faulty LAN when an intermittent failure occurs on one of the duplicated LAN in a power system supervision system of a server/client form. SOLUTION: In a server 1, normality is decided by receiving a periodic message in the duplicated LAN within a timeout time T1. In case both LANs are normal, the LAN continuing the reception of the periodic messages for more than a time Ts set longer than the above timeout time T1 is used preferentially. COPYRIGHT: (C)2008,JPO&INPIT