Patent ID: 9584161
Date: 2017-02-28
CPC Classifications: H03M,H04B,H04J,H04L

Claim:
1. A transmission device transmitting a polarization-multiplexed optical signal, the transmission device comprising: a frame encoder configured to encode an electric signal in accordance with a predetermined frame format; an error correction encoder configured to provide encoded signal data as a result of the encoding by the frame encoder with a predetermined error correction code; and a transmission loss information acquiring part configured to acquire transmission loss information based on a loss that the encoded signal data provided with the error correction code incurs when the encoded signal data is transmitted, from a receiving device as a transmission destination, wherein the error correction encoder is configured to adjust a redundancy of the error correction code given to the encoded signal data, based on the transmission loss information acquired by the transmission loss information acquiring part; the transmission loss information acquiring part is configured to acquire polarization dependent loss information based on a polarization dependent loss incurred by a first-direction polarized wave and polarization dependent loss information based on a polarization dependent loss incurred by a second-direction polarized wave, as the transmission loss information, respectively; and the error correction encoder is configured to adjust the redundancy of the error correction code given to the encoded signal data transmitted as the first-direction polarized wave and the redundancy of the error correction code given to the encoded signal data transmitted as the second-direction polarized wave, in accordance with the polarization dependent loss information, respectively.