Network delay measurement method and device and network node

Abstract

The invention discloses a network delay measurement method and device and a network node. The method comprises the steps that a source node generates a delay measurement OAM message and records the sending timestamp of the source node in the OAM message when the source node sends the OAM message; when forwarding nodes receive and forward the OAM message, the forwarding nodes record the receiving timestamp and the sending timestamp of the forwarding nodes in the OAM message; and when a destination node receives the OAM message, the destination node records the receiving timestamp of the destination node in the OAM message and obtains the delay of each link, the delay of each forwarding node and the overall path delay through calculation according to the timestamp information, recorded in the OAM message, of all the nodes. According to the method and device, peer-to-peer delay measurement and end-to-end delay measurement are completed at a time, end-to-end delay measurement abnormities brought by network redundancy protection are avoided, and the error accumulation effect brought by multi-time and multi-segment measurement is avoided, so that the delay measurement precision is improved.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method, device and network node for measuring network time delay. Background technique [0002] Network delay is a very important performance of the network, especially in scenarios with very high real-time requirements, such as aerospace, military industry, automatic control and other scenarios. [0003] To measure the delay between two nodes, a separate OAM (Operation Administration and Maintenance) message is generally used for measurement. Currently, there are two measurement methods: [0004] 1) Point-to-point (P2P, Peer To Peer) measurement: Each link between two nodes is measured separately, and then accumulated segment by segment to obtain the delay between the two nodes [0005] 2) End-to-end (E2E, End To End) measurement: directly measure the delay between two nodes end-to-end. [0006] Such as figure 1 In the network shown, X1-X6 are service endpoints, and S1-S...

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Problems solved by technology

Therefore, when protection occurs, the delay value obtained by end-to-end measurement will change suddenly, resulting in the need for complex correlation processing and filtering processing to distinguish the two situations, which increases the complexity of delay measurement.

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