High-precision clock synchronization method by considering round-trip time delay asymmetry

Abstract

The invention designs a high-precision distributed clock synchronization method. The method comprises the steps of: establishing a computer clock mathematical model according to the hardware principleof a quartz crystal oscillator; and different from an existing clock synchronization method, setting the assumption of round-trip time delay symmetry, providing the clock synchronization method applicable to asymmetric round trip time delay, establishing a new clock synchronization time service model, correcting frequency deviation on the basis of a derived relative frequency deviation formula between clocks, and dynamically adjusting the clock synchronization period in different clock synchronization stages. According to the invention, the precision of clock synchronization is improved, theperiod of clock synchronization is prolonged, and the communication overhead of clock synchronization is further reduced.

Description

technical field [0001] The invention relates to a high-precision clock synchronization method considering the asymmetry of the round-trip time delay, especially for the problem that the round-trip time delay is assumed to be symmetrical in many existing clock synchronization methods, and belongs to the technical field of distributed clock synchronization methods. Background technique [0002] With the rapid development of computer networks, information software technology has also been more and more widely used. A large number of application fields related to people's livelihood require computer systems to provide highly reliable and high-precision clocks to precisely control key tasks and work, such as Internet financial transactions, each node in the wireless sensor network coordinates with each other to complete the detection and perception of the responsible task, defines the sequence of events in the distributed network, and so on. For many applications, a small clock e...

AI Technical Summary

Problems solved by technology

In 2017, Google designed and implemented the TrueTime API to achieve global clock synchronization. Unfortunately, Google gave the function interface design of the TrueTime API, but did not give a specific hardware design

[0005] In the field of wireless sensor networks, the clock synchronization model has the same place as the distributed field, but the wireless hardware equipment is relatively small and has limited computing power, so a more concise transmission method and method must be used to achieve clock synchronization

Images