| 摘要 |
<P>PROBLEM TO BE SOLVED: To evade a problem of extendability and a problem accompanying complication of calculation when a network scale becomes big. <P>SOLUTION: In adjacent domains, border nodes Yb1 and Yb2 inside the domain on a termination side calculate quality (OSNR) of all routes that can reach a termination node D1 inside a domain Y on the basis of quality information announced within a present network, select the OSNR of the route of the worst quality, retrieve whether or not there is a wavelength satisfying continuity of the wavelength, calculate the wavelength, and transmit the information to border nodes Xa1 and Xa2 of an X adjacent to the Y. The transmitted information is announced to respective nodes inside the X. When there is a request to set a wavelength path to the termination node D1 in a source node S1, the S1 determines through which inter-domain link a route should be set on the basis of the quality information of the respective domains and wavelength information satisfying the wavelength continuity, and transmits a signaling message clearly describing route information. <P>COPYRIGHT: (C)2013,JPO&INPIT |
