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|1. (WO2017155001) OPTICAL CROSS-CONNECT DEVICE|
|Applicants:||NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY
|Title:||OPTICAL CROSS-CONNECT DEVICE|
An OXC device of route-and-select architecture in the prior art requires 120 1×9 WSSs in the entire device when the number of ports is 20. An OXC device of route-and-select type exceeding 20 ports requires a large quantity of expensive WSSs and lacks feasibility in terms of cost. Expansion matched to the extent of increase in traffic of a node is impossible, there is a lack of flexible scalability, and reasonable network operation including economy is difficult. An OXC device of the present disclosure uses smaller-scale WSSs than in prior art and internally connects the WSSs from a different viewpoint than in prior art, irrespective of the number of input ports and the number of output ports of the device, thereby making it possible to greatly reduce the cost of the device. Furthermore, this OXC device can be expanded flexibly, economically, stepwise only as necessary, and without limits in accordance with the initial state of traffic and subsequent increases thereto.