Network control method

TL;DR: In this article, the authors proposed a ring switch cancellation scheme to cancel ring switches during the execution of LP-S by outputting a K-byte signal containing various kinds of information to the long path side of the ring switch, and outputting K bytes corresponding to lockout of protection span to the short path side.

Abstract: PURPOSE: To cancel a ring switch during the execution of LP-S by outputting a K-byte signal containing various kinds of information to the long path side of the ring switch, and outputting K bytes corresponding to lock-out of protection span to the short path side. CONSTITUTION: When a node D starts the cancel operation of MS-R, the node D opens a switch and outputs the prescribed K bytes to the side of a node E while keeping the output K bytes on the side of a node C as they are. When the node C receives the K bytes of a long path code by NR outputted from the node D, the node C opens the switch and cancels a bridge. Then, the K bytes of LP-S are outputted to the side of a node B and the output K bytes on the side of the node D are kept as they are. Then, the respective nodes from the node E to the node B are transited from a full path through state to a K byte path through state. Besides, when the node D receives the K bytes of L-PS outputted from the node C, the respective nodes from the node E to the node B are maintained in the K-byte path through state.