Design And Implementation Of EPON+EOC-based Network Topology Management System

Ethernet Passive Optical Network (EPON) is one of the broadband access means, which integrates passive optical network (PON) and Ethernet. Ethernet over Coax (EOC) is used as one way of user access, which can effectively make full use of existing resources, such as coaxial-cable. Therefore, both uses of EPON and EOC are thought to be the most suitable technology for two-way and digital transformation of radio&television network. With the development of EPON+EOC, the numbers of devices in the network don’t only become more and more, but also the structure of the network becomes more and more complex. In order to effectively manage the network, it is necessary to develop an efficient network management system. In the meantime, topology management is an indispensable part of the network management system, which can provide the network topology graph to show the operation status and organizational structure of the network. However, unified management of EPON and EOC has not been realized at the present. That is to say, they are managed in a relatively independent way. To solve the problem, this paper designs and implements the EPON+EOC integrated network topology management system is designed and implemented in this thesis.Firstly, according to introduction of EPON technology, EOC technology, the function requirement of unified network topology management, database management system and SNMP development kit, the comprehensive network topology management system, the automatic topology discovery module, the topology fault location module, the display module of hierarchical network topology and fault devices and the database management system are designed. The design of automatic topology discovery module can be divided into two parts: the design of EPON devices of automatic topology discovery module and the design of EOC devices of automatic topology discovery module. And in the design of topology fault location module, a new way of topology fault location is proposed, which is based on the way of fault device location based on the history correlation and the way of fault device location based on the event-driven correlation.at last, powerful Oracle10g is selected as the database management system of the network topology management system.Secondly, according to above design scheme, development tools MyEclipse, Web server Tomcat, the topology generated plug-in Twaver and SNMP development kit SNMP4J are used to implement the unified network topology management system under the operating system Windows 7. The implementation of automatic topology discovery module is divided into two parts: topology data acquisition and generation of data source. And the implementation of the topology fault location module can also be divvied into two parts:the realization of way of fault device location based on the history correlation and the realization of the way of fault device location based on the event-driven correlation. The realization of the display module of hierarchical network topology and fault devices includes the implementations of the hierarchical topology display and communicating with the fault location module. The persistence of Oracle is realized by Hibernate.Finally, in order to validate the performance of the unified network topology management system, an experimental network is built by EPON and EOC devices made by the Dongguan JinHoutian company. At first, the function of automatic topology discovery module and hierarchical topology display are test, and then the functions of topology fault location module and topology fault location display are tested. Simulation results demonstrate that the designed unified network topology management system has reached the design goal.