公开(公告)号：JPH08237195A

公开(公告)日：1996-09-13

申请号：JP34601895

申请日：1995-12-11

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： ROBERUTO KADETSUDOU ,  RITSUKARUDO KARUBUAANI ,  JIYUZETSUPE FUERARISU ,  ROBERUTO RANO ,  EMIRIO BUETSUTSUOONI

IPC: H04B10/02 ,  H04B10/20 ,  H04B10/213 ,  H04J14/02 ,  H04L12/437

Abstract: PROBLEM TO BE SOLVED: To efficiently use a transmission capacity. SOLUTION: In a ring network communication structure for communication with optical transmission lines 3A and 3B, plural nodes 2A...2E are mutually connected by at least first and second optical transmission lines 3A and 3B like optical fibers. A first wavelength λ1 is used for communication in one direction on the first transmission line 3A out of this pair of optical transmission lines to perform transmission in a ring network based on a WDN structure, and a second wavelength λ2 is used on the other optical transmission line 3B to perform communication in the opposite direction. If one of these connections gets faulty, nodes 2B and 2C adjacent to each other which cannot be connected are reconfigured, and the first wavelength λ1 is used on the second transmission line 3B and the second wavelength λ2 is used on the first transmission line 3A to continue the communication through another route given from the ring network. This structure is suitably applied to an SDH optical fiber ring network.