| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that communication is interrupted for a long time when a state is switched back from an abnormal state to a normal state. SOLUTION: A topology information management frame is classified based on the contents stored in the topology information management frame, and information stored in a database is updated based on the contents stored in the topology information management frame in accordance with a result of classification. COPYRIGHT: (C)2009,JPO&INPIT
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