IEEE 1588 time synchronization system and implementation method thereof

Abstract

The invention discloses an IEEE 1588 time synchronization system. By adding a time-stamp processing module, a time-stamp message transceiving sub module, a time-stamp message resolving sub module, a time-stamp message generating sub module, a local time recording register, and an RTC correction / time read-write module in the module are used for combining peripheral components such as a switch module, a PHY and a real-time clock (RTC) module to form a hardware system. When in use, the high precision time synchronization requested by an IEEE 1588v2 protocol can be implemented by using the modes of one-to-one or one-to-many of master-slave synchronization. The invention also discloses a method for implementing the IEEE 1588 time synchronization, which can implement the function of the time synchronization system by processing the time information of master-slave devices in real time. The invention plays an active role in promoting Ethernet construction.

Description

technical field [0001] The invention relates to the time synchronization technology of Institute of Electronics and Electrical Engineers (IEEE) 1588 protocol, in particular to a multi-port IEEE 1588 time synchronization system and its realization method. Background technique [0002] The full name of IEEE 1588 is Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, usually called Precision Time Protocol (PTP, Precision Time Protocol). The purpose of generally using the IEEE 1588 precision time protocol is to maintain time synchronization between different nodes in the Ethernet. There are also numerous applications in factory automation, measurement, and communication that require very precise time synchronization, which is often beyond what can be provided by standard software-based solutions. [0003] The IEEE 1588 standard specifies a protocol for synchronizing independently running clocks to a high degree of precision and accuracy dispe...

AI Technical Summary

Problems solved by technology

IEEE 1588v2 can realize frequency synchronization and time synchronization at the same time, and the time synchronization can achieve sub-microsecond precision. The protocol is well standardized and can support the connection of different manufacturers. Since the time information is transmitted by adding time tags in the message, it is required The two-way delay of the intermediate link must be consistent, and the inconsistent delay will cause phase measurement deviation, which will have a certain impact on the time accuracy. In addition, the time accuracy will also be affected by factors such as packet loss

Moreover, using software to realize the setting of the IEEE 1588 protocol stack will also cause the jitter of the protocol stack processing delay due to the multitasking of the software processing flow and the operating system. Therefore, if the IEEE 1588v2 protocol is implemented by software, it will be difficult to achieve the expected transmission. Requirements for High-Precision Time Synchronization

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