Patent ID: 9160562
Filing Date: 2015-10-13
Classification: H04L

Abstract:
1. A node forming a ring network, comprising: a first receiver configured to receive ring information attached between nodes from a first adjacent node located at a first side of the node, the ring information being unique information for distinguishing between nodes on the ring network; a second receiver configured to receive the ring information from a second adjacent node located at a second side of the node; a first transmitter configured to transmit, to the second adjacent node, a first ring information which is obtained by adding first local ring information attached between the node and the second adjacent node to the ring information received by the first receiver; a second transmitter configured to transmit, to the first adjacent node, a second ring information which is obtained by adding second local ring information attached between the node and the first adjacent node to the ring information received by the second receiver; a first save list is configured to store the first ring information transmitted in a counterclockwise direction on the ring network; a second save list is configured to store the second information transmitted in a clockwise direction on the ring network; and a processing circuit which determines a duplicated ring information set in the ring network by comparing the first save list and the second save list; wherein each piece of the ring information is transmitted by a different frame, to the frame, a head flag indicating a head of the ring information and a tail flag indicating a tail thereof are attached, and a first reception list storing the ring information received by the first receiver and a second reception list storing the ring information received by the second receiver sequentially store the ring information from the ring information of the frame having the head flag to the ring information of the fame having the tail flag.