Time delay measurement method and device

Abstract

The invention relates to the field of network communication and in particular to a time delay measurement method and device for solving the great limitation of a conventional method for measuring time delay. According to the embodiment of the present invention, a master device stores at least one virtual time and periodically updates respective virtual time. The method comprises steps that the master device sends a measurement packet to a slave device, and determines a first time point according to the virtual time corresponding to the slave device when the measurement packet is sent; the master device receives a measurement response message returned from the slave device and determines a fourth time point according to the virtual time corresponding to the slave device when the measurement response message is received; the master device determines, according to the first time point, the second time point, the third time point and the fourth time, an offset between the virtual time corresponding to the slave device and the real time of the slave device; if the offset is not greater than a first threshold, the master device determines that the virtual time corresponding to the slave device is synchronized with the real time; and the master determines the one-way time delay between the master and slave devices.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a delay measurement method and device. Background technique [0002] Service-Level Agreement (Service-Level Agreement, SLA) is a real-time network performance detection and statistics technology based on the application scenarios defined by Connectivity Fault Management (CFM). Detect and monitor network traffic to generate reports based on detection results. The key performance indicators (Key Performance Indicators, KPI) of SLA mainly include delay and packet loss rate, etc., corresponding to the delay / jitter test (Delay Measurements, DM) and packet loss rate test (Loss Measurements, LM) of SLA. [0003] In some deployment scenarios, both the master device and the slave device can initiate SLA measurements, such as measuring delay. A common delay measurement protocol in a layer 2 network is a DMM (Delay measurement message, delay measurement message) / DMR (Delay m...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a time delay measurement method and device to solve the problem that the time delay measurement method in the prior art has great limitations

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