| 摘要 |
A first communication device determines whether a communication device that is not included in a routing path exists through an exchange of routing information with a plurality of adjacent communication devices. In this case, if a communication device that is not included in a routing path exists, the first communication device notifies a corresponding communication device to operate in a power saving mode, operates to decrease power use that is related to the corresponding communication device, and the communication device, having received the notification operates in a power saving mode.
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