Dispersion compensation adjustment method, device and system thereof

Abstract

The embodiment of the invention provides a dispersion compensation adjustment method, a device and a system thereof. The dispersion compensation adjustment method comprises the following steps: determining the dispersion compensation dosage of an optical network unit (ONU) by up-link transmission delay; acquiring DBA distribution results, wherein, the DBA distribution results comprise bandwidth distribution results of the ONU of next frame; and finally carrying out dispersion compensation in accordance with the DBA distribution results and the dispersion compensation dosage. The method, the device and the system of the embodiment of the invention can optimize the dispersion compensation or the dispersion pre-compensation effect of an OLT end or an ONU end and improve the up-link or down-link receiving performance.

Description

technical field [0001] The present invention relates to optical fiber communication, in particular to a dispersion compensation adjustment method, device and system. Background technique [0002] Usually, the passive optical network (PON, Passive Optical Network) technology refers to a point-to-multipoint (P2MP, Point To Multi Point) optical fiber access technology, which consists of an OLT (Optical Line Terminal, optical Line Terminal), ONU (Optical Network Unit, Optical Network Unit) or ONT (Optical Network Terminal, Optical Network Terminal) on the user side, and ODN (Optical Distribution Network, Optical Distribution Network). The passive optical network system mainly adopts a tree topology, such as figure 1 shown. [0003] Wherein, the OLT provides a network side interface for the PON system, and connects to one or more ODNs. ODN is a passive optical splitting device, which is used to connect OLT equipment and ONU / ONT equipment, and is used to distribute or multiplex...

AI Technical Summary

Problems solved by technology

[0006] The adjustable dispersion compensator can be controlled by a feedback signal to improve the dispersion compensation effect, wherein the feedback signal can be the bit error rate of the received data (generated by the FEC (Forward Error Correction, forward error correction) function), this method only Suitable for systems with FEC functions, it is difficult to realize the statistics of bit error rate, etc., and the response speed is slow

Another kind of dispersion compensator calculates the quality of dispersion based on the waveform of the preamble electrical signal. The disadvantage of this method is that the algorithm is complex, difficult to implement, and has large errors.

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