Edge-Core ECS4810-12M Uživatelský manuál stáhnout pdf (Strana 15)

ITU-T Y.1731

Common name: Performance and Throughput Management

• Scope: an end-to-end connection

• Delay measurement can be used to measure frame delay and frame delay variation

between MEPs.

• If a MEP is enabled to generate frames with delay measurement (DM) information, it

periodically sends DM frames to its peer MEP in the same MA, and expects to

receive DM frames back from it.

• Frame delay measurement can be made only for two-way measurements, where the

MEP transmits a frame with DM request information containing timestamps:

Frame Delay = (RxTimeStampb-TxTimeStampf)-(TxTimeStampb-RxTimeStampf)

• The MEP can also make two-way frame delay variation measurements based on its

ability to calculate the difference between two subsequent two-way frame delay

measurements.

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Edge-Core ECS4810-12M Uživatelský manuál Strana 15