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1. (WO1999013606) HITLESS RECONFIGURATION OF A WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION NETWORK

Pub. No.:    WO/1999/013606    International Application No.:    PCT/US1997/023798
Publication Date: Mar 18, 1999 International Filing Date: Dec 23, 1997
IPC: H04J 14/02
H04Q 11/00
Applicants: TELCORDIA TECHNOLOGIES, INC.
Inventors: BALA, Krishna
CHANG, Gee-Kung
ELLINAS, Georgios, N.
POST, Michael
SHEN, Chien-Chung
WEI, John, Yee-Keung
Title: HITLESS RECONFIGURATION OF A WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION NETWORK
Abstract:
A method of reconfiguring a multi-wavelength communication network (Fig. 6). The transition includes determining the union of the old and new topologies. During at least the start of the transition, the network supports the union topology. New connections are connected according to the new topology, and the old topology, as its connections expire, is gradually removed. In allocating wavelengths to a new topology, two algorithms are developed which assign wavelengths which do not color clash with the wavelength assignments of the old topology.