A method of optical network terminal batch grading in passive optical network system on gigabit Ethernet

Abstract

The invention relates to a method for batch upgrading an optical network terminal (ONT) in a Gigabit Passive Optical Network (GPON) system, including the following steps: A. a optical line terminal (OLT) starts to download a version-upgrading document and sends the upgrading-starting message to the dominated ONT which prepares a storing space according to the length of a version-upgrading document after receiving the upgrading-starting message and returns an answering message to the upgrading-starting message; B. the OLT splits the version-upgrading document into a plurality of segments which are sealed in the message of downloading upgrading data and broadcasted to the dominated ONT through a broadcasting channel; C. after all the segments of the version-upgrading document are delivered, the OLT sends an upgrading-ending message, which carries a length of document and a checksum of the version-upgrading document, to the ONT, the ONT adopts the same algorithm for checksum with OLT for calculating the checksum of the length of document of version-upgrading document carried in the upgrading-ending message, and if the calculated checksum is same as the checksum carried in the upgrading-ending message, the version-upgrading document is wholly received.

Description

technical field [0001] The invention relates to a gigabit passive optical network (GPON), in particular to a method for upgrading optical network terminals (ONTs) in batches in a gigabit passive optical network system. Background technique [0002] GPON (Gigabit Passive Optical Network) is a new generation of gigabit passive broadband optical access technology developed by ITU-T SG15. Optical Network Terminal) and ODN (Optical Distribution Network), usually using a point-to-multipoint network structure. As shown in Figure 1. [0003] The GPON standard system is mainly composed of G.984.1, G.984.2, G.984.3 and G.984.4. The entire standard system defines and regulates the general characteristics of GPON, PMD, transmission and convergence sublayer, ONT management and interface control, etc. systematically. Among them, G.984.4 (GPON OMCI specification) is committed to realizing the interoperability of multi-vendor OLT and ONT equipment. This proposal specifies the ONU managem...

AI Technical Summary

Problems solved by technology

Usually the system does not allocate a large bandwidth for the OMCI network management channel, and the upgrade will take a long time

[0013] Second: does not support batch upgrade

Since the download method is defined as transmission in the OMCI channel, the OMCI channel is established between the OLT and the ONT in a point-to-point manner, so when the OLT upgrades multiple ONTs at the same time, it can only use the point-to-point method for the ONTs one by one through OMCI Message transfer image file, which greatly increases the time to upgrade ONT and makes the process of upgrading ONT very cumbersome

[0014] Third: does not support automatic identification of ONTs from different manufacturers

In practical engineering applications, the OLT may manage ONT devices from multiple manufacturers at the same time, and the software image files of ONUs from different manufacturers cannot be used interchangeably. If the wrong software image file is downloaded, the ONT cannot be started correctly.

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