| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a network communication method with which power consumption can be further reduced not only at a sensor device node but also at a relay device node. <P>SOLUTION: Such timing control is implemented that a sensor device node performs communication for a time promised beforehand. Thus, a relay device node operated only during the time and is turned into a sleep state other than the time. Furthermore, time information required for communication timing control of the sensor device node and the relay device node is given from the side of the relay device node, thereby synchronizing the communication. <P>COPYRIGHT: (C)2009,JPO&INPIT |
