C-type optical link protection switching optimization method of GPON (Gigabit Passive Optical Network)

Abstract

A C-type optical link protection switching optimization method of GPON (Gigabit Passive Optical Network) includes that all OLTs (Optical Line Terminals) in the C-type optical link protection switching GPON are connected onto an SDN (Software Defined Network) controller to form a C-type optical link protection switching GPON based on the SDN framework, wherein when a main optical link between the OLTs and an ONU (Optical Network Unit) is built, the SDN controller conducts optical link building optimization control to make the main optical link in the GPON to meet the load balancing requirements of the optical links, and after main optical link protection switching between the OLTs and the ONU is achieved, the SDN controller conducts optimal control on optical link protection switching in the GPON to make the main optical link in the GPON to meet the optical link load balancing requirements. According to the C-type optical link protection switching optimization method, optical link protection switching is achieved through automatic calculation of the SDN controller, so network maintenance work is simplified, reliability of the optical network is ensured, and the ONU service can be balanced onto main PON interfaces and standby PON interfaces of the OLTs.

Description

technical field [0001] The present invention relates to a GPON (gigabit passive optical network, gigabit passive optical network) network C class optical link protection switching optimization method, in particular to a GPON network C based on SDN (Self-Defending Network, Self-Defending Network) An optimization method for protection switching of similar optical links. Background technique [0002] In order to improve the reliability and robustness of the optical network, an optical link protection switching mechanism can be used in a PON (Passive Optical Network) system. There are four main types of optical link protection. Such as figure 1 As shown, it is Class C optical link protection, which has the following characteristics: [0003] 1. OLT (Optical Line Terminal, Optical Line Terminal) has dual PON interfaces, and the main and backup PON interfaces are both in working state (hot backup). The OLT should ensure that the service information of the active PON interface ...

AI Technical Summary

Problems solved by technology

[0008] 1. Loss of input optical signal (LOS);

[0009] 2. Input channel channel degradation:

[0010] 2.1. The input optical signal power is too high or too low;

[0011] 2.2. The bit error rate exceeds the limit;

[0012] 3. Equipment hardware failure:

[0013] 3.1. The optical module is faulty;

[0014] 3.2. PON MAC chip failure (applicable to protection between different PON MAC chips);

[0015] 3.3. Board failure (applicable to PON inter-board protection);

For a large-scale network, this work is obviously not easy, and it is very error-prone

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