Patent Number: 7,355,979

Title: Communication network, path setting method, network management system and node

Abstract: A hierarchized path setting system in a communication network efficiently contains lower order paths in higher order path. The communication network has a plurality of nodes capable to perform switching process and demultiplexing process not only for lower order paths in a predetermined hierarchical level among hierarchized paths but also for higher order paths in a hierarchical level higher than the predetermined hierarchical level, and a plurality of links connecting these nodes. The system is responsive to a new path setting demand for setting the lower order path, for setting the lower order path in the higher order path when a single higher order path is set from a predetermined transmiter node group, in which a transmiter node of the lower order path belongs, to a predetermined receiver node group including a receiver node.

Inventors: Nishioka; Itaru (Tokyo, JP), Suemura; Yoshihiko (Tokyo, JP)

Assignee: NEC Corporation

International Classification: H04L 12/26 (20060101); H04L 12/28 (20060101)

Expiration Date: 2020-04-08 0:00:00