EP 1354439 A2 20031022 - OPTICAL COMMUNICATIONS NETWORK AND NODE FOR FORMING SUCH A NETWORK
Title (en)
OPTICAL COMMUNICATIONS NETWORK AND NODE FOR FORMING SUCH A NETWORK
Title (de)
OPTISCHES ÜBERTRAGUNGSNETZWERK UND KNOTEN ZUR HERSTELLUNG EINES DERARTIGEN NETZWERKS
Title (fr)
RESEAU DE COMMUNICATION OPTIQUE ET NOEUD POUR FORMER UN TEL RESEAU
Publication
Application
Priority
- GB 0104601 W 20011012
- US 69606700 A 20001025
Abstract (en)
[origin: WO0235749A2] An optical network has adjacent pairs of nodes in a ring connected by a working optical fiber or fibers and by a protection optical fiber or fibers of lower bandwidth. Each node comprises an optical switching arrangement for switching signals from at least one external input to the node onto a protection fiber, each node further comprising a detector for detecting signal failure or degradation on the or each incoming working fiber. The optical switching is controlled in dependence on the detected signal failure or degradation. An optically switched protected ring configuration is thereby provided with shared protection allocation, for example 1:n protection. The sharing of protection bandwidth between greater bandwidth working fibers improves the fiber efficiency. This requires the signals on the working fibers to be allocated a level of service, so that premium channels are protected against cable failure because they have the lower protection bandwidth allocated to them.
IPC 1-7
IPC 8 full level
H04J 14/02 (2006.01); H04Q 11/00 (2006.01)
CPC (source: EP)
H04J 14/0227 (2013.01); H04J 14/0241 (2013.01); H04J 14/0283 (2013.01); H04J 14/0284 (2013.01); H04J 14/0295 (2013.01); H04Q 11/0005 (2013.01); H04Q 11/0062 (2013.01); H04Q 2011/0011 (2013.01); H04Q 2011/0016 (2013.01); H04Q 2011/0024 (2013.01); H04Q 2011/0039 (2013.01); H04Q 2011/0052 (2013.01); H04Q 2011/0081 (2013.01); H04Q 2011/0092 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0235749 A2 20020502; WO 0235749 A3 20030828; AU 9572901 A 20020506; CA 2426857 A1 20020502; EP 1354439 A2 20031022
DOCDB simple family (application)
GB 0104601 W 20011012; AU 9572901 A 20011012; CA 2426857 A 20011012; EP 01976459 A 20011012