Optical access network system based on software definition and realization method thereof

Abstract

The invention discloses an optical access network system based on software definition and a realization method thereof. The method includes that an SDN controller is additionally arranged in the uplink direction of the optical line terminal of a GPON to monitor and adjust the bandwidth distribution and ONU access registration in real time, the control of the GPON transmission convergence layer is moved up to the SDN controller, so that the flexible control of the bandwidth allocation of the GPON network and the ONU access registration can be realized, a southbound protocol agent is added to the optical line terminal, so that the communication of the SDN controller and the optical line terminal is realized via the southbound protocol. The bandwidth allocated by different ONUs is adjusted according to the flow condition in the GPON in real time, and an appropriate scheme of automatically finding windows is determined according to the actual online number of the ONUs, so that the system delay is effectively reduced, and the utilization rate of network bandwidth is improved.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a software-defined optical access network system and an implementation method thereof. Background technique [0002] With the acceleration of the triple play process and the rapid development of emerging services in the Internet, the services in the access network are diversified and complicated. An increasing number of home and business users hope to obtain greater access bandwidth on the one hand, and hope to be able to flexibly and finely control their own service bandwidth on the other hand. Therefore, people have put forward higher requirements for optical access networks. In addition to further To upgrade traditional 1G PON (passive optical network, passive optical network) to 10G PON, it is hoped that it can have the characteristics of intelligence, openness and flexible management and control, while the traditional access network system adopts pre-configured...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is on the basis of fully considering the functions such as bandwidth allocation and user access registration of the media access layer as the core of the PON, aiming at the inflexible defects of the existing PON system bandwidth allocation and automatic discovery process. The problem of SDNization of optical access network

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