Line protection reverse method in high-speed parallel optical transmission system

Abstract

The invention discloses the rearranging method for protecting line used in the high-speed parallel optical transmission system. The sync word in SDH frame of the synchronous digital system is assigned to use as the channel number requested to the protection rearrangement and the signaling code of the indicator to show the completion of protection rearrangement at each channel. If the receiving end has detected that the errors are appeared in 2 channels among 12 optical fiber channels. Then, the signaling for requesting the rearrangement is sent back to the sending end through the reversal link. With the signaling being received by the sending end, at the time of starting next SDH frame, the channel is rearranged to the last channel. The method makes the network resources use adequately, lowers the failure rate.

Description

technical field [0001] The invention relates to a high-speed parallel optical transmission system based on a synchronous digital hierarchy (SDH), in particular to a line protection switching method in a very short distance (VSR) high-speed parallel transmission system. Background technique [0002] The method currently used for the VSR optical interface of the SDH adopts the standard protocol OIF-VSR4-01.0 of the Optical Internet Forum (Optical Internet Forum). This interface uses 12 parallel optical fiber ribbons to transmit data at 9.95238 Gbits per second at a line rate of 1.24416 Gbits per second per fiber. [0003] The method of VSR interface to transmit SDH data is to put the first synchronization byte A1 in the STM-64 (synchronous transmission module) frame structure into the first channel, put the second A1 byte into the second channel, and so on By analogy, until it is placed in the ninth and tenth channels, and then the eleventh A1 byte of the data STM-64 frame is...

AI Technical Summary

Problems solved by technology

[0005] 1. Only 9.95238G valid data is transmitted in all 1.24416G×12 line bits, and the transmission efficiency is low

[0006] 2. The OIF-VSR4-01.0 standard only provides protection against errors in one optical fiber, but in fact all data can be completely transmitted with only ten optical fibers, so the existing method does not make full use of twelve optical fibers

[0007] 3. In protection switching, there is no signaling between the sending and receiving ends, which not only wastes abundant redundant bit resources on the line, but also is not conducive to network management

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