Patent ID: 9001823
Filing Date: 2015-04-07
Classification: H04J

Abstract:
1. A method for service clock transparent transmission in an optical transport network (OTN), comprising: an OTN receiving end performing a de-mapping operation to an OTN frame after receiving the OTN frame to recover a service data flow therefrom, and inputting the service data flow to a first buffering unit, the first buffering unit performing a homogenization treatment to the service data flow and then outputting to a second buffering unit, and the second buffering unit outputting the service data flow according to a service clock after receiving the service data flow; wherein, in the step of the first buffering unit performing a homogenization treatment to the service data flow and then outputting to a second buffering unit, the first buffering unit reads the service data flow into the present unit according to an OTN clock, and reads out the service data flow from the present unit according to the OTN clock under control of a reading enabling signal and sends to the second buffering unit; a preset value of a ratio of a number of clock cycles indicating that a reading signal is in an enabling status of the reading enabling signal to a total number of clock cycles of the reading enabling signal equals to a quotient of service clock frequency and OTN clock frequency; the method further comprises: adjusting the number of clock cycles indicating that the reading signal is in the enabling status of the reading enabling signal accordingly through judging whether status of the first buffering unit is empty or full.