Clock message tunnel transmission method, network node and communication system

Abstract

The invention discloses a clock message tunnel transmission method, a network node and a communication system, relating to the field of communication. The method comprises the following steps of: at an entrance of a tunnel, carrying out package handling to a received tunnel entrance clock message in a package mode corresponding to the tunnel, and carrying out clock correction handling to the clock message subjected to the package handling; and sending the clock message subjected to the clock correction handling to an exit of the tunnel. The network node for handling the clock message comprises a package module and a sending module. The communication system comprises the network node for handling the clock message, a network node in the tunnel and a tunnel exist network node. The clock message which is packaged again passes through the tunnel. As the nodes themselves are used as clock reference points to carry out passthrough handling in follow-up handling, each network node needs not to reach absolute time synchronization, the problem of clock synchronization of clock message tunnel transmission is solved, and the clock synchronization in the tunnel passthrough is more accurate.

Description

technical field [0001] The invention relates to the communication field, in particular to a clock message tunnel transmission method, a network node and a communication system. Background technique [0002] With the transformation of telecommunication networks into IP (Internet Protocol, Internet Protocol), it is generally necessary for telecommunication equipment to support IP transmission. However, many telecommunication devices have high requirements for clock synchronization (for example, TD-CDMA requires the absolute time accuracy of NodeB devices to be no less than ±1.5μs). However, the traditional IP network is based on packet switching. Since the requirements for synchronization are not high, it cannot meet the high IP transmission requirements for clock synchronization. Moreover, since the IP network has no special requirements on the physical layer and the data link layer, an operational network may consist of multiple different types of physical networks. Among ...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a clock message tunnel transmission method, network node and communication system to solve the problem of clock synchronization in tunnel traversal

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