One-to-one bidirectional optical circuit protection switching method based on control command bytes

Abstract

The invention discloses a one-to-one bidirectional optical circuit protection switching method based on control command bytes. The method comprises the following steps: judging the statuses of work and a protective circuit by a first single disk according to optical power detected by a PIN tube; reporting an optical power loss alarm when the optical power detected by the PIN tube is lower than an optical loss threshold; configuring a status byte K2 according to the optical power loss alarm, and configuring a byte K1 to describe the protection switching action to be simultaneously taken by the first single disk and a second single disk; transmitting the bytes K1 and K2 to the second single disk; carrying out the corresponding protection switching action by the second single disk according to the bytes K1 and K2 which are received, so that at the end, the opposite end is informed when protection switching action is carried out in the receiving direction of the first single disk, and protection switching action is simultaneously carried out in the transmitting direction of the second single disk, thus receiving and transmitting actions are unified, and unblocked optical signals in operation are ensured all the time.

Description

technical field [0001] The invention relates to the technical field of optical communication transmission, in particular to a one-to-one bidirectional optical line protection switching method based on control command bytes. Background technique [0002] In the existing WDM / OTN system, the 1+1 mode is generally adopted for optical line protection. In the 1+1 protection mode, the service optical signal is split at a 50:50 ratio at the transmitting end, and a service optical signal with better performance is selected at the receiving end for processing. The advantage of this concurrent selective receiving method is that the control method is simple and the protection device is simple. The disadvantage is that the light power of the service light (1550nm band) passing through the protection device is reduced by at least 4-5dB, which seriously affects the performance and transmission distance of the entire system. [0003] The 1:1 protection method can effectively reduce the los...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to notify the sending direction of the opposite end to perform the protection switching action at the same time when the receiving direction of the local end performs the protection switching action, so that the sending and receiving actions are unified and the service optical signal is always unblocked.

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