Clock signal transfer method in communication network system and the communication network system thereof

Abstract

The embodiments of the present invention provide clock signal transfer methods in a communication network system and the communication network system thereof, wherein one of the methods includes the following steps: a second communication device receives a first channel associated clock signal sent from a first communication device and regards the signal as a reception clock signal of the second communication device (101); the second communication device acquires a transmission clock signal of the second communication device according to the reception clock signal of the second communication device (102); the second communication device transmits the data carrying the transmission clock signal of the second communication device to a third communication device (103). The embodiments of the present invention can ensure that the data transmission of two communication nodes which communicate with each other refers to the same clock source, and thereby solve the problem that the disaffinity of the clock source of each communication device results in the frequency deviation of inner communication devices of a receiver communication node. The transmission rate of the inner communication devices of the receiver communication node can be made to match with each other, the package loss phenomenon is avoided, and thus the transmission reliability is improved.

Description

technical field [0001] Embodiments of the present invention relate to communication technology, and in particular to a clock signal transmission method in a communication network system and a communication network system. Background technique [0002] The communication system may include multiple communication nodes, and the data communicated between them may be transmitted using a serializer / deserializer (SerDes, SDS for short). The SDS has two types of interfaces, one is an interface based on a source synchronization (SS) protocol, and the other is an interface based on a clock data recovery (CDR) protocol. The difference between the two lies in the way of implementing clock control. The former uses the clock signal associated with the clock signal of the transmitted data for clock control, and the latter uses the clock signal recovered from the transmitted data for clock control. [0003] Taking two communication nodes as an example, communication node M and communicatio...

AI Technical Summary

Problems solved by technology

Since the clock sources of each communication device are different, it may cause the frequency deviation of the communication device inside the communication node N, so that the transmission rates of the communication devices inside the communication node N do not match, resulting in packet loss, thereby reducing the transmission reliability

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