Optical network unit (ONU) device of EPON (Ethernet Passive Optical Network) system and protection switching method for same

Abstract

The invention provides an optical network unit (ONU) device, a method for realizing data synchronization of the device, a method for switching a main PONMAC (Passive Optical Network Media Access Control) with a standby PONMAC as well as a method for switching the optical network unit device with a local optical line terminal. The ONU device comprises optical transceiver modules which are mutually backed up; the optical transceiver modules are respectively and electrically connected with the PONMAC modules which are mutually backed up and respectively correspond to the optical transceiver modules and a core exchange module; and the ONU device further comprises a logic control module. Under the condition that the first and second PONMAC modules are respectively and electrically connected with the core exchange module, the first and second PONMAC modules are also respectively and electrically connected with the logic control module. According to the invention, the cost of the ONU device is reduced and the synchronous and protection switch process is free from hand in hand, is more optimized in time and higher in reliability.

Description

technical field [0001] The invention relates to network equipment, in particular to the network equipment used in the Ethernet-based passive optical network system and the protection switching method thereof. Background technique [0002] The protection switching modes of the existing Ethernet-based Ethernet Passive Optical Network system, referred to as the EPON system, include the following three types: [0003] Full protection type 1, such as image 3 As shown, the EPON system includes an optical line terminal OLT 200 with dual PON ports, two 1:N optical splitters 300, N optical network unit ONU devices 100', and a backbone optical fiber. The PON is the English abbreviation of Passive Optical Network; the OLT is the English abbreviation of Optical Line Terminal; the ONU is the English abbreviation of Optical Network Unit. The optical line terminal OLT 200 is usually provided with a main control board (a total of 2 main / standby boards), a PON service board (multiple p...

AI Technical Summary

Problems solved by technology

[0007] 1. The two PON MACs need to synchronize the data, and there are two ways to solve this at this stage: one method is to first configure on one PON MAC, and then use the command to dump the configuration, so as to ensure that the data of the two PON MACs are consistent. The implementation process is complicated and the synchronization is slow; another way is to automatically synchronize through two PON MACs at the same time, so that the configurations on both sides are consistent, but the synchronization is slow due to the large amount of synchronization data;

[0008] 2. The method to check whether the data of the two PON MACs are consistent is very simple. It is to issue commands on both sides separately. The data on both sides should be completely consistent except for the address. If any inconsistency is found, modify the inconsistent place until the data on both sides is completely consistent , the implementation process is complicated;

[0009] 3. Switching time problem: The switching time of dual MAC ONU has nothing to do with the topology. It mainly depends on the internal alternative scheme and control logic of the ONU. The switching time of a typical system is about 50 milliseconds

[0010] 4. In the current method, the biggest problem is the re-handshake problem for the network interface User Network Interface, that is, the UNI interface, which is caused by the alternative solution and control logic inside the ONU device, involving clock signals ( 125MHz) synchronization, Ethernet adaptive Auto-Negotiation and other processes, time-consuming and low reliability, the UNI is the Gigabit interface between the PON MAC and the core switching module Ethernet Switch

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