| 摘要 |
A method and system for realizing clock passthrough in an asynchronous mapping process, which are applied to an AMP demapping device. The method comprises: performing frequency division on a recovery clock of an OTU2 signal according to a rate relationship between an ODU2 signal and the OTU2 signal to obtain a recovery clock of the ODU2 signal; according to a JC value extracted from the ODU2 signal, determining a rate relationship between an ODU1 and the ODU2, and performing frequency division on a recovery clock of the ODU2 according to the rate relationship to obtain a recovery clock of the ODU1; and according to a JC value extracted from an ODU1 signal, determining a rate relationship between an STMk signal and the ODU1 signal, and performing frequency division on the recovery clock of the ODU1 according to the rate relationship to obtain a recovery clock of the STMk signal. The technical solution of the present invention can enable a demapping end to recover a reference clock frequency of a demapping end recovering client service data to directly follow a clock frequency of original client service data. |
