Clock Data Recovery Method and Device for Branch Signal in SDH

摘要

Disclosed are a method and a device for recovering clock data of a tributary signal in SDH, wherein the method includes that: it is to extract valid data of the signal from a time slot of each tributary in a synchronous digital hierarchy SDH frame, and store into a storage space corresponding to a time slot of each tributary in a cache; it is to recover a clock signal and a readout signal for the time slot of each tributary by means of time division multiplexing; when the readout signal for the time slot of any tributary is valid, it is to read out contents of the data from the storage space corresponding to the time slot of the tributary in the cache, and latch into a latch corresponding to the time slot; the device includes: a data extracting module, a clock recovery circuit and a data recovery module.

主权项

1. A method for recovering clock data of a tributary signal in synchronous digital hierarchy (SDH), comprising:
extracting valid data of a signal from a time slot of each tributary in a synchronous digital hierarchy (SDH) frame structure, and storing into a storage space corresponding to a time slot of each tributary in caches; recovering a clock signal and a readout signal for a time slot of each tributary by means of time division multiplexing; and when a readout signal for a time slot of any tributary is valid, reading out contents of data from the storage space corresponding to the time slot of the tributary in the caches, and latching into a latch corresponding to the time slot.