Patent ID: 9048966
Filing Date: 2015-06-02
Classification: H04J

Abstract:
1. An optical transmission apparatus in a network for making a one-to-multi communication by establishing paths from one point to multi points, the optical transmission apparatus comprising: a reception side high-order layer data unit processing circuit configured to demultiplex a first aggregated data unit of a plurality of data units of a low-order layer from other data units of a low-order layer, the plurality of data units of the low-order layer being transmitted by using a plurality of paths sharing a section within the network and aggregated into the first aggregated data unit as one aggregation, when data is transmitted in the section shared by the plurality of paths in a process for extracting data units of a low-order layer from a data unit of a high-order layer of an input optical signal; a reception side low-order layer data unit processing circuit configured to perform clock extraction in a unit of the first aggregated data unit, and to execute an alarm process in the unit of the first aggregated data unit; a switching circuit configured to perform switching by disassembling an output of the reception side low-order layer data unit processing circuit into internal frames for switching, and to generate data units of a low-order layer from the internal frames for switching after the switching is performed; a transmission side low-order layer data unit processing circuit configured to aggregate the plurality of data units of the low-order layer transmitted by using the plurality of paths sharing the section among the data units of the low-order layer formed after the switching is performed into a second aggregated data unit of a low-order layer as one aggregation, and to insert alarm information, obtained by the reception side low-order layer data unit processing circuit, in the second aggregated data unit; and a transmission side high-order layer data unit processing circuit configured to assemble the second aggregated data unit from the transmission side low-order layer data unit processing circuit into a data unit of a high-order layer, and to transmit the assembled data unit.