A method, device and system for time synchronization

Abstract

A time synchronization method, device and system, and a storage medium. The method may comprise: a network entry node records a first time value at which a Precision Time Protocol (PTP) data packet enters the network entry node; the network entry node updates a correction value of a correction field in the PTP data packet according to the first time value, so as to obtain a first updated PTP data packet; and the network entry node sends the first updated PTP data packet to a network, so that the network sends the first updated PTP data packet to a network exit node.

Description

technical field [0001] The present invention relates to network communication technology, in particular to a method, device and system for time synchronization. Background technique [0002] In the current mobile communication network, accurate time synchronization must be maintained between base stations to ensure that users will not experience disconnection and other failures during the mobile process. In existing communication equipment, the precision clock synchronization protocol standard for network measurement and control systems proposed by the Institute of Electrical and Electronics Engineers (IEEE, Institute of Electrical and Electronics Engineers) in 2002 and revised in 2007 is widely used. Also known as the IEEE1588 protocol. [0003] In this protocol, each transmission node device is regarded as a transparent clock, and the precision time protocol (PTP, Precision Time Protocol) data packet is processed at each node, and the residence time of the node is calcula...

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Problems solved by technology

[0005] First of all, multiple transmission node devices in the network calculate their own residence time separately, which will increase the overhead of network resources;

[0006] Secondly, the cascading mode of multiple transmission node devices in the network will accumulate the error of each transmission node device due to asymmetric transmission path delay or network jitter, reducing the dwell time accuracy of the entire network;

[0007] In addition, it is necessary to compensate for the asymmetry of the two-way transmission path delay of the transmission medium between each pair of transmission node devices in the network, which increases the workload of the network.

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