System and method for online updating of bandwidth of optical network unit in wavelength division multiplexing optical access network

Abstract

The invention relates to a system and a method for achieving the online updating of the bandwidth of an optical network unit in a wavelength division multiplexing optical access network. The system is formed by adopting a mode that one optical line terminal is connected with one remote node which is connected with 40 optical network units, wherein the remote node adopts a mode that a waveguide grating router is combined with a microelectronic mechanical optical switch to achieve the dynamic scheduling with any specified wavelength. Based on the system, the method applies the wavelength dynamic scheduling mode to performing the online updating of the bandwidth of the optical network unit. The system and the method have the characteristics of low cost for network construction and bandwidth updating, no influence on the running of the original static network by the online updating of the bandwidth of the optical network unit, and high utilization rate of the wavelength of the whole network.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a wavelength division multiplexing optical access network system and method based on dynamic wavelength scheduling and spectrum segmentation technology that can realize online upgrade of optical network unit ONU bandwidth. Background technique [0002] The wavelength division multiplexing optical access network combines the technical characteristics of the wavelength division multiplexing technology and the optical access network, and assigns a unique wavelength to each ONU for uplink / downlink data transmission, which has good information security, high transmission bandwidth, The unique advantages of large coverage and easy location of system faults make it the best choice for fiber-to-the-home. Most of the wavelength division multiplexing optical access networks that have been put into operation now need to upgrade the ONU bandwidth without affecting the use of existing use...

AI Technical Summary

Problems solved by technology

In order to achieve the above object, the concept of the present invention is: when the network upgrades and expands, instead of assigning a designated wavelength to each ONU, the mode of wavelength dynamic scheduling is used as the system expansion scheme, and in this way, the number of operating channels in the network upgrade part is reduced. and the number of specific wavelength lasers in reserve, so as to overcome the problems of low wavelength utilization caused by the upgrade and expansion of the existing wavelength division multiplexing optical access network and the realization of the existing dynamic wavelength scheduling scheme is limited by remote nodes.

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