| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent cluster synchronization from being polarized, and to select a node that becomes a suitable synchronization reference. <P>SOLUTION: In a communication system where a plurality of nodes that operate with different clocks communicate according to a time trigger scheme, one selected synchronization node is used as a synchronization master node to transmit a synchronization frame that becomes a cluster synchronization reference, clusters are synchronized on the basis of the synchronizing frame, and a monitor node judges whether or not a correction amount of a present node for the synchronization frame from the synchronization master node is settled within a set threshold range. On the basis of a result of the judgement, a next synchronization master node is enabled to judge whether to implement a change of the synchronization master node. Thus, the cluster is prevented from being polarized and a suitable synchronization node can be selected as a synchronization master node. <P>COPYRIGHT: (C)2009,JPO&INPIT |
