| 摘要 |
<P>PROBLEM TO BE SOLVED: To make it possible to identify an activation frame for its own node without increasing consumption power of a node in a sleep mode in a communication system in which a node in the sleep mode can be woken up individually. <P>SOLUTION: In an ECU 10 in a sleep mode, if a standby state detection circuit 21 detects that a communication path LN has changed from a standby state to a non-standby state, a frame length detection circuit 22 determines whether or not a period length until the LN will return to the standby state again is less than an activation length, and a feature length amount detection circuit 23 determines whether or not a feature amount extracted from a bit pattern set in a specified pattern area of a frame corresponds to an activation amount pre-assigned to its own ECU 10. A wakeup determination circuit 24, if the period length is less than the activation length, changes an indiscriminate wakeup signal WA to an active level, and in addition, if the feature amount corresponds to the activation amount, changes an individual wakeup signal WU to the active level. <P>COPYRIGHT: (C)2012,JPO&INPIT |
