Optical line transmission protection system and method

Abstract

The present invention discloses an optical line transmission protection system and method, wherein the optical line transmission protection system comprises at least one grade optical line protection segment comprising a transmitting end and a receiving end. The transmitting end is provided with an optical power distribution adjustment module, the receiving end is provided with an optical switch, the transmitting end of optical line protection at a home terminal and the receiving end of the optical line protection at an opposite terminal are connected to form a main optical line and a preparative optical line, the optical power distribution adjustment module is used for setting the splitting ratio of the main optical line and the preparative optical line according to the optical fiber state difference of the current working channel and nonworking channel, and the optical power distribution of the transmitting end corresponding to the main optical line and the preparative optical line can be adjusted according to the splitting ratio of the main optical line and the preparative optical line. The embodiments of the present invention enable the handshaking process to be simplified, the switching reliability to be increased and the switching time to be reduced.

Description

technical field

[0001] The embodiments of the present invention relate to the technical field of communications, and in particular to an optical line transmission protection system and method. Background technique

[0002] In 1+1 line protection, in single-span or multi-span scenarios from Optical Terminal Multiplexer (OTM) to OTM, the optical line protector (Optical Line Protector; OLP) sender uses The 50:50 coupler splits the signal light equally and sends it to the main and backup lines, and the receiving end of the OLP uses an optical switch for selective reception. In the application scenario of OTM to OTM single-span or multi-span transmission, since the transmitting end uses a 50:50 coupler, the optical transmission line system introduces an additional loss of about 3dB; if the transmission distance of the optical transmission line exceeds a certain value, the 3dB The loss has a great impact on the performance of the optical transmission line system (optical power bu...

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