Patent ID: 8971172
Filing Date: 2015-03-03
Classification: H04L

Abstract:
1. A ring network of a multicast label switch path scheme, the ring network comprising: a transmitting node and a plurality of receiving nodes connected to form a ring, wherein a signal input to the transmitting node is branched to be transmitted in first and second different directions to a first one and a second one of the receiving nodes through a first working path and a second working path, respectively, in the ring network, the first one and the second one of the receiving nodes defining terminal points of the first working path and the second working path, respectively, from the transmitting node, wherein a first backup path is set from the first one of the receiving nodes to the transmitting node, and a second backup path is set from the second one of the receiving nodes to the transmitting node, wherein the first backup path is in an opposite direction to the first working path and the second backup path is in an opposite direction to the second working path, and wherein the transmitting node includes a controller configured to periodically insert and transmit a first monitor/control packet in the first and the second working paths to monitor connections, and upon receiving a second monitor/control packet reporting a fault from the first or the second backup path, insert and transmit a third monitor/control packet in the first or the second working path, the third monitor/control packet instructing the first one or the second one of the receiving nodes defining the terminal point of the first or the second working path in an opposite direction to the first or the second backup path, respectively, to connect the first or the second working path to the first or the second backup path.