COMMUNICATION NODE AND TOKEN ISSUING METHOD AND TOKEN RING COMMUNICATION METHOD IN RING-SHAPED COMMUNICATION SYSTEM

摘要

To obtain a communication node for performing a token communication by a ring topology built by the Ethernet ring. At the same time issuing a token start Volume frame obtained containing the specific information, other when the communication receives the token start Volume frame obtained from the node, by using the unique information of unique information of the another communication node and the party communication node priority in accordance with a predetermined reference determining a rank, and character communication node other communication nodes than the first case priority is high, the token begins Issues issued at a predetermined time interval to obtain frame and character when the communication node is priority is lower ranking than the other communication node, the token start Volume stopping the issue of acquisition frames, and the other communicating with the nodes of the token begins authority token start volume acquisition processing unit 21 to transmit the acquired frame, it receives the to traverse the ring-on, a token start Volume frame acquisition issued by the authority token start acquisition processing When provided with a token start processing unit 22 to supply a token frame to the ring.