Time synchronization method and related equipment and system

Abstract

The embodiment of the invention discloses a time synchronization method and related equipment and system. The time synchronization method comprises the steps as follows: master clock equipment sends a first time synchronization message to slave clock equipment and acquires a time T1 sent by the first time synchronization message through radio frequency; a second time synchronization message is sent to the slave clock equipment and the timestamp of the T1 is carried in the second time synchronization message; a third time synchronization message from the slave clock equipment is received, and a time T4 of the third time synchronization message received by an empty port physical layer is acquired; and a fourth time synchronization message is sent to the slave clock equipment and the timestamp of the T4 is carried in the fourth time synchronization message, so as to calculate out the clock skew amount between the master clock equipment and the slave clock equipment by the slave clock equipment according to the T1 and the T4, and correct the local clock of the slave clock equipment according to the obtained clock skew amount. The scheme provided by the embodiment of the invention is favorable for improving the time synchronization precision of the master clock equipment and the slave clock equipment.

Description

technical field [0001] The present invention relates to the communication field, in particular to a time synchronization method and related equipment and system. Background technique [0002] At present, with the gradual completion of Internet Protocol (IP, Internet Protocol) transformation of the core network of the communication network, the IP transformation of the wireless access network will become the key to the evolution of the entire mobile network to an all-IP (ALL-IP) network. In the process of realizing the IP-based wireless access network, the time synchronization problem is a problem that needs to be studied and solved. Time synchronization means that the absolute time between different systems is the same. For example, in a communication system, each system has an internal time, that is, a local clock, which is managed by the clock device of the system. Because each system's local Clocks run independently, so the local clocks of each system are not necessarily...

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Problems solved by technology

[0004] Practice has found that when the time synchronization mechanism of the master-slave clock device in the existing wired network is applied to the wireless network, the time synchronization accuracy between the master-slave clock device is usually low

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