A delay detection method and device for an end-to-end network

Abstract

The invention discloses a delay detection method and device for an end-to-end network. The method comprises the following steps: receiving data packets transmitted by a source node in a statistic window i; computing the transmission delay of each data packet and the average transmission delay of all data packets received from the statistic window i to the reception of each data packet respectively, and further computing a first differential value between the transmission delay of each data packet and the average transmission delay of all data packets received in a statistic window i-1 respectively; and judging whether the first differential value between the transmission delay of each data packet and the average transmission delay of all data packets received in the statistic window i-1 satisfies a preset first judgment condition or not, and pre-judging that network delay changes when the first difference value of at least one data packet satisfies the first judgment condition. By adopting the method, accurate detection of the transmission delay is realized, an additional external clock synchronizing system does not need to be built, and an excellent detection effect is achieved in a scene where the transmission delay changes slowly.

Description

technical field [0001] The invention relates to the technical field of communication network transmission, in particular to a method and device for detecting time delay of an end-to-end network. Background technique [0002] In recent years, due to advantages such as flexible networking, low investment, and convenient deployment of an IP-based voice transmission (Voice over IP, VoIP) network, the VoIP service has developed rapidly. In the VoIP network, voice packets are transmitted in real time, but due to the instability of the IP network itself, such as delay, packet loss, and jitter caused by network congestion and different routes, it will affect the perception of end users. In particular, network congestion will not only increase network delay and seriously affect the perception of real-time services, but also increase network jitter, making voice intermittent and blurred. [0003] However, network congestion does not occur regularly, and network conditions are affecte...

AI Technical Summary

Problems solved by technology

This method needs to ensure that the source node and the destination node have strict clock synchronization. Therefore, an external clock system (such as GPS) is generally used to synchronize the local clock. However, setting up an external clock is complicated and cumbersome, and in some scenarios there are certain limitation factor

[0005] In addition, there are related existing technologies that estimate the change of delay based on the delay jitter, and believe that when the delay jitter increases, the network delay changes accordingly

This method has better detection performance in scenarios where the network delay varies greatly instantaneously; but when the network delay changes slowly, such as the delay jitter is not obvious and is still within the acceptable range or the delay increases slowly. , this method cannot detect the change of delay

Moreover, in practical applications, the network delay often increases or decreases slowly, so this technology also has certain limitations.

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