| 摘要 |
In a communication system wherein a collecting communication unit of a plurality of communication units collects state information from report communication units to manage the state information, each of the report communication units comprises a state information memory for storing the state information of own communication unit, a state monitoring portion for monitoring the state information of own communication unit and then rewriting the stored state information into new state information after change if the state information has been changed, and a transmitting/receiving portion for adding the stored state information and own address to the recovery command and then transmitting the recovery command when respective report communication units receive the recovery command for recovering the state information, whereby the collecting communication unit can receive the recovery command to which changed state information and their own addresses of respective report communication units are added collectively.
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