Method and system for processing 1588 time stamp in distribution mode

Abstract

The invention provides a system and a method for processing a 1588 time stamp in distribution mode. The system comprises a 1588 protocol processor, an exchange unit and an edge time stamp processor, wherein the edge time stamp processor is distributed on the edge of the system, determines whether to add a corresponding time stamp on a message or not according to the type of the message transmitted by an external exchange network, transmits the message to the exchange unit, receives the message transmitted by the exchange unit to determine whether to carry out time delay compensation or not, and transmits the message to the external exchange network of the system; the exchange unit receives the message transmitted by the edge time stamp processor, and determines whether to penetrate the message or forward the message to the 1588 protocol processor; and the 1588 protocol processor calculates system time needing to be compensated according to the time stamp information of the message transmitted by the exchange unit, and synchronizes system time. The method and the system can realize high-efficiency time stamp transfer inside the system when time stamps of messages are processed at high flow capacity.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method and system for distributed processing of 1588 time stamps. Background technique [0002] At present, there are two types of synchronization between devices in a communication network: one is frequency synchronization, that is, the signals at the source end and the destination end maintain a certain relationship in frequency or phase, that is, the frequency of the source end and the destination end Keep the same within a certain precision, the phase difference is constant, frequency synchronization is usually also called clock synchronization, for example, synchronous Ethernet, E1 interface clock synchronization, etc.; another kind of synchronization is time synchronization, that is, not only the same frequency, but also the same phase, And have the same time notation scale. [0003] The above-mentioned frequency synchronization and time synchronization are...

AI Technical Summary

Problems solved by technology

In terms of time stamp processing methods in the PTN system, the current method adopted by various manufacturers is centralized time stamp processing. Each unit sends the messages of each external unit to the central time stamp processor, and then the central processor processes the protocol. This method is difficult to accurately determine the time stamp; corresponding to it is the distributed time stamp processing, which places the time stamp processing in each external unit of the device, and the 1588 protocol is processed in the central processor, which can minimize the internal delay unit of the device The impact on the time stamp, but when the message frequency is high, the timeliness of the central protocol processor for the time stamp processing will be greatly affected, which has high requirements on the performance of the device, otherwise useful time stamps may be discarded

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