| US 7,587,634 B2 | ||
| Network fault diagnostic device, network fault diagnostic method, and computer product | ||
| Satoshi Imai, Kawasaki (Japan); Akira Chugo, Kawasaki (Japan); Hitoshi Ueno, Kawasaki (Japan); Akiko Yamada, Kawasaki (Japan); and Hitoshi Yamada, Tokyo (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Feb. 23, 2006, as Appl. No. 11/360,945. | ||
| Claims priority of application No. 2005-283976 (JP), filed on Sep. 29, 2005. | ||
| Prior Publication US 2007/0074076 A1, Mar. 29, 2007 | ||
| Int. Cl. G06F 11/00 (2006.01) | ||
| U.S. Cl. 714—26 | 10 Claims |
| 1. A network fault diagnostic device that identifies a fault based on a causal relation between a fault occurring on a network
and an event indicating a sign of the fault, comprising:
a storage unit to store therein a plurality of probabilities indicating the causal relation by which each of a plurality of
faults occurs subsequent to each of a plurality of events;
an event acquiring unit to select a minimum event required for identifying an occurring fault based on differences between
two of the plurality of probabilities that respectively correspond to two different faults for an identical event and to acquire
selected event from each device connected to the network; and
a fault determining unit to identify the occurring fault by extracting a set of first fault candidates having the causal relation
with the event acquired by the event acquiring unit and obtaining a set common to the first fault candidates and second fault
candidates corresponding to the event previously acquired by the event acquiring unit.
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