Patent ID: 9549231
Date: 2017-01-17
CPC Classifications: H04J,H04L,H04Q

Claim:
1. An optical transmission device, comprising: a serializer and deserializer configured to convert an input client signal into parallel data at a sampling rate of k times (k is a power of 2) a rate of the input client signal and output the parallel data; a frame generation circuit configured to generate an optical channel payload unit (OPU) frame from the client signal; and a stuff control circuit including a stuff operation circuit and a consecutive-bit judgment circuit, the consecutive-bit judgment circuit being connected to an output of the parallel data, the stuff operation circuit being configured to perform, in units of 1/k bits, a stuff operation to map the client signal into the OPU frame and thereby calculate a Cn(n=1/k) value which is a theoretical value of the stuff operation, the consecutive-bit judgment circuit being configured to detect a data change point from the parallel data, calculate an additional value to be added to the Cn(n=1/k) value based on the change point, and feed the additional value to the stuff operation circuit to be added to the Cn(n=1/k) value.