Method and device for sending and receiving mapping cost
An overhead and quantity technology, applied in the field of optical transmission network, can solve the problem of slow adjustment process and achieve the effect of flexible adjustment
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Embodiment 1
[0045] Such as Figure 5 As shown, the method of sending mapping overhead includes:
[0046] 501. Acquire a change value of the number of client data bytes received in the current transmission frame period relative to a reference value. Steps include:
[0047] 5011. Obtain the number of client data bytes received in the current transmission frame period and the last transmission frame period, and use the number of client data bytes received in the last transmission frame period as a reference value.
[0048] In the OTN frame, the client signal is placed in the payload area of the frame. At the sending end, by counting the client clock in one OTN frame period, the number of bytes Cn of the client data in one OTN frame period can be obtained. Obtain the number of client data bytes received in the current transmission frame period and the last transmission frame period, and use the number of client data bytes received in the last transmission frame period as a reference value...
Embodiment 2
[0114] Such as Figure 10 As shown, the method of sending mapping overhead includes:
[0115] 1001. Acquire a change value of the number of client data bytes received in the current transmission frame period relative to a reference value. Steps include:
[0116] 10011. Acquire the number of bytes of client data in the current OTN frame period, obtain the minimum value of the number of bytes of client data received in the transmission frame period according to the client clock and the local clock, and use the minimum value as a reference value.
[0117] In an OTN frame, client signals are placed in the payload area of the frame.
[0118] At the sending end, according to the input client signal, the client clock is recovered from the client signal through a phase-locked loop, and the client data is stored in the FIFO. The Cn value acquisition unit calculates the minimum value Cn(min) of Cn according to the client signal clock and the local system clock, and transmits Cn(min...
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