Patent ID: 7711270
Filing Date: 2010-05-04
Classification: H04B,H04J

Abstract:
1. An optical node that is connected to a first network and a second network, the first network including a first transmission path and a second transmission path, the first transmission path and the second transmission path propagates light with reverse directions, the second network including a third transmission path and a fourth transmission path, the third transmission path and the fourth transmission path propagates light with reverse directions, comprising: a switching unit configured to selectively switch a plurality of optical signals propagating in the first transmission path and a plurality of optical signals propagating in the second transmission path to the third transmission path and the fourth transmission path, and to selectively switch a plurality of optical signals propagating in the third transmission path and a plurality of optical signals propagating in the fourth transmission path to the first transmission path and the second transmission path; a failure detector that detects a failure in the first network; and a control unit that controls the switching unit, wherein, when the failure detector detects the failure in the first network and a connection failure occurs between a first node in the first network and a second node in the second network utilizing the second transmission path and the fourth transmission path, the control unit controls the switching unit so that the first node and the second node are connected utilizing the first transmission path and the fourth transmission path.