| 摘要 |
A ring network protection method for an optical transmission network relates to digital information transmission, and includes using the overhead byte APS/PCC in the ODUk to transmit the protection information of the APS. The method adds fields in the APS/PCC and further includes: (a) the network element in which the protection switching takes place in the OTN sends the protection switching information to other network elements through the fields set in the APS/PCC of the ODUk; and the network element which received the ODUk performs corresponding processing according to the fields carried by the APS/PCC in the ODUk and implements the protection switching for the OTN ring network.
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