Clock synchronization method, equipment and system

Abstract

The invention provides a clock synchronization method, clock synchronization equipment and a clock synchronization system. The method comprises the following steps of: in a first transmission mode, generating a first receiving timestamp by using a first link and acquiring a first transmitting timestamp of master clock equipment; in a second transmission mode, generating a second transmitting timestamp by using the first link and acquiring a second receiving timestamp of the master clock equipment; and according to the first receiving timestamp, the first transmitting timestamp, the second transmitting timestamp and the second receiving timestamp, acquiring a time deviation with the master clock equipment; and realizing clock synchronization with the master clock equipment through the time deviation. The embodiment of the invention provides slave clock equipment and the master clock equipment. The embodiment of the invention also provides the clock synchronization system. The method, the equipment and the system realize the uniformity of message round trip links between the master clock equipment and the slave clock equipment, and ensure the symmetry of uplink delay and downlink delay.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to a clock synchronization method, device, and system. Background technique [0002] With the continuous development of communication technology, the transmission technology of the telecommunication network has gradually evolved from the circuit switching mode based on Time Division Multiplexing (TDM for short) to the packet switching mode based on IP. In the traditional TDM networking scheme, the downlink node of the link can recover the synchronization signal of the uplink node from the TDM E1 / T1 link, but in the IP networking scheme, due to the asynchronous transmission characteristics of the IP network, it cannot Supports the transmission of synchronization information at the physical layer. Therefore, in the evolution process of the telecommunication network from the circuit switching mode to the packet switching mode, how to ensure the sy...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a clock synchronization method, device, and system, which are used to solve the application problem of the network synchronization scheme in the prior art in the asymmetrical uplink and downlink physical link scenarios, and realize the synchronization between the master clock device and the slave clock device. The round-trip link of the message is unified, ensuring the symmetry of the uplink and downlink delays, and improving the recovery accuracy of synchronization information

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