Fault restoration control method and it's apparatus in a communication network

摘要

A method for restoration from a fault in a communication network formed by interconnecting a plurality of nodes (N1, N2, N3) including at least one set of node equipment each including a line terminal equipment (LTE1) and an optical cross-connect equipment (OXC1), via a plurality of transmission lines using optical fibers (OF12, OF13, OF23). According to this method for restoration from a fault, if a line terminal equipment (LTE1) of at least one set of node equipment has detected a fault in an optical fiber (OF12) under communication, it gives (301) a command functioning as trigger for optical fiber change-over to an optical cross-connect equipment (OXC1) included in the node equipment (N1). Upon receiving this command functioning as the trigger, the optical cross-connect equipment (OXC1) exchanges (302, 303, 304, 305) change-over control information indicating optical switch setting situation between it and an optical cross-connect equipment included in another node equipment, and forms (309, 310, 311) a restoration route.