Automatic wavelength tuning method and automatic wavelength tuning system based on TWDM-PON (time wavelength division multiplexing-passive optical network)

Abstract

The invention discloses an automatic wavelength tuning method and an automatic wavelength tuning system based on a TWDM-PON (time wavelength division multiplexing-passive optical network). The method includes: adding a multi-wave MAC (media access control) control sublayer on a multipoint MAC control sublayer of an EPON (Ethernet passive optical network) protocol stack to coordinate load balance of multiple wavelength pairs, and the multi-wave MAC control sublayer works in TDM (time division multiplexing) domains of all wavelengths. The multi-wave MAC control sublayer is specifically used for assigning at least one logical link identifier for optical network units when the optical network units are registered, binding one of the logical link identifiers with MAC addresses of the optical network units, and scheduling the registered optical network units on the wavelength pairs with the least number of the optical network units. By the aid of the automatic wavelength tuning method and the automatic wavelength tuning system, mutual coordination among the wavelength pairs can be achieved, the bandwidth of the whole system is fully used, and load balance among the wavelength pairs can be realized.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a TWDM-PON-based automatic wavelength tuning method and system. Background technique [0002] PON (Passive Optical Network) system is composed of three parts: OLT (Optical Line Terminal), ODN (Optical Distribution Network) and ONU (Optical Network Unit). In the downstream direction (from the optical line terminal to the optical network unit), the signal sent by the optical line terminal reaches each optical network unit through the optical distribution network, and in the upstream direction (from the optical network unit to the optical line terminal), the signal sent by the optical network unit It will only reach the optical line terminal, but not other optical network units. The optical distribution network consists of optical fibers and one or more passive optical devices such as passive optical splitters, providing optical channels between optical line terminals...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a wavelength automatic tuning based on TWDM-PON that can make the wavelength pairs cooperate with each other and achieve the load balance between the wavelength pairs in order to solve the defect of unbalanced wavelength pair load in the prior art. method and system

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