Patent ID: 7630649
Filing Date: 2009-12-08
Classification: H04B,H04J,H04L

Abstract:
1. An optical node comprising a switching unit that switches an optical signal, wherein a preset section in which data transmission is possible without 3R (Reshaping, Retiming, and Regeneration) relay is defined as a 3R section, the optical node device comprising: a storing unit which stores 3R section information corresponding to topology information of an optical network to which the optical node device itself belongs; and a determining unit which determines autonomously whether the optical node device itself is an optical node device that implements 3R relay when setting an optical path passing through the optical node device itself, with reference to the 3R section information stored in the storing unit which stores the 3R section information, wherein when an optical node device, being a source of a setting request for an optical path, is the source node, an optical node device at an end point of the optical path is the destination node, and the optical path is bi-directional, an optical path directed away from the source node toward the destination node is defined as a downstream optical path, and an optical path directed away from the destination node toward the source node is defined as an upstream optical path, and when the optical path is a bi-directional optical path, the determining unit is provided with a unit which decides, at the time that a bi-directional path setting is signaled, which optical node device implements 3R relay in both the downstream optical path and the upstream optical path.