Method for selecting master clock based on PTP (Picture Transfer Protocol) and link quality, slave clock and system

Abstract

The present invention discloses a method for selecting a master clock node based on a precision time protocol (PTP) and link quality. The method includes the following steps: configuring a link quality selection policy according to a link quality index, wherein the link quality index comprises link packet loss ratio, and / or time delay jitter and / or link time delay; selecting a target master clock node according to the configured link quality selection policy. The present invention also discloses a slave clock node and system for selecting a master clock node based on a PTP and link quality. The present invention not only satisfies the actual selection requirement of a user, but also improves the multi-selectivity and flexibility of obtaining the master clock node, and solves the problem that in traditional private telephonic network (PTN) a master clock node can not be selected when the master clock node does not send a notification message.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method, a slave clock and a system for selecting a master clock based on PTP and link quality in clock synchronization technology in a PTN network. Background technique [0002] In the field of mobile network technology, there is a strict requirement for high-precision clock synchronization. The purpose of clock synchronization is to synchronize the clocks of each node in the network to the same reference. For example: wireless systems based on FDD (Frequency Division Duplex, frequency division duplex) such as UMTS require clock frequency synchronization between nodes, while wireless systems based on TDD (Time Division Duplexing, time division duplex) such as TD-SCDMA / CDMA2000, etc. Synchronization of clock frequency and phase is required. [0003] At present, GPS (Navigation Satellite Timing And Ranging Global Position System, Global Positioning System for Navigation Satel...

AI Technical Summary

Problems solved by technology

[0012] The main purpose of the present invention is to provide a method, a slave clock and a system for selecting a master clock based on PTP and link quality, aiming to select a destination master clock according to the quality of the link, so as to solve the problem that the master clock does not send notifications in traditional PTN. The problem that the main clock cannot be selected when sending a message

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