Clock calibration method and device

Abstract

A clock calibration method and device, which can solve the problem that the frequency deviation between clock nodes of a terminal device is too large during the clock calibration process, resulting in unstable operation or even collapse of the terminal device. The method includes: the terminal equipment adopts the first timing information, adjusts the second timing information of the terminal equipment according to the reference timing information, and then switches from adopting the first timing information to adopting the second timing information when it is determined that the first condition is met. Wherein, the first timing information is primary timing information, and the second timing information is backup timing information, and the first condition includes: the first timing information is different from the reference timing information, and the second timing information is the same as the reference timing information; or, the first The timing information is different from the second timing information; or, the first timing information is different from the reference timing information.

Description

technical field [0001] The present application relates to the communication field, and in particular to a clock calibration method and device. Background technique [0002] Within the coverage of an external reference timing signal, such as a global position system (global position system, GPS) clock signal, the terminal device will adjust its own time and clock frequency so as to keep the same time and clock frequency as the external reference timing signal. The terminal device can include multi-level branch clock nodes. When the terminal device is outside the coverage of the external reference timing signal, the terminal device can enter an autonomous state, that is, the time and clock frequency of all branch clock nodes inside the terminal device are the same as the main clock node The time and clock frequency are synchronized. [0003] When the terminal device receives the external reference timing signal again, the terminal device first adjusts the time and clock frequ...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a clock calibration method and device, which can solve the problem that during the clock calibration process, the frequency deviation between the clock nodes of the terminal equipment is too large, which causes the terminal equipment to run unstable or even crash

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