Method and system for detecting packet loss rate in packet transport network

Abstract

The invention discloses a method for detecting the packet loss rate in a packet transport network. The method is capable of effectively detecting the real-time packet loss rate of the data flow of a service variable in priorities, and includes the steps: invoking an LM (loss measurement) message capable of detecting the priority service for each priority of the service so as to measure the frame loss; summarizing frame loss results of each priority of the service, and computing the total packet loss rate of the service; and transmitting the computed total packet loss rate of the service to a graphical interface so as to be presented to a customer or transmitting to an equipment protection mechanism for SD (signal degrade) switching. The invention correspondingly discloses a system for detecting the packet loss rate in the packet transport network, and the system comprises a frame loss measuring module, a total packet loss rate computing module and a packet loss rate transmitting module.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a packet loss rate detection method and system in a packet transmission network. Background technique [0002] Frame Loss Measurement (LM) refers to, in order to ensure the normal and effective operation of the service quality, a statistical method adopted by the device counter to count the difference in the number of service frames sent and received between the ingress and the egress of the point-to-point packet transport network, so as to calculate the network Service packet loss rate, and then report the packet loss rate of real-time traffic or notify SD (signal degradation) protection switching. [0003] Frame loss measurement is mainly realized by sending and receiving LM frames between a pair of maintenance domain nodes (MEP) and combining the maintenance of two local calculators, including local transmitted data (TxFCI) and local received data (RxFCI). T...

AI Technical Summary

Problems solved by technology

According to various LM standard definitions, each counter can only read the number of service packets in the priority scheduling bucket corresponding to LM.

Then, if the service priority sent by the base station contains multiple types, that is to say, the service priority is not unique but variable, then the counter in the LM frame can only read one of the service priorities The value of LM packet loss rate calculation will become inaccurate

[0005] In the original LM standard definition, a MEG (Maintenance Domain Association Group) can only send LM messages of a certain priority, and can only monitor and count a certain priority service of the MEG monitoring object, and the priority of the service is variable In the case of business congestion, high priority services do not lose packets, and low priority services lose too many packets. At this time, LM packets can only be measured individually, and the calculation of packet loss rate is not credible.

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