Research And Implementation Of EPON Element Management System Based On SNMP

With the rapid development of Internet services, higher and higher requirements of network bandwidth are needed. Since the backbone network has already the adequate ability to sustain the broadband, access network bandwidth becomes the bottleneck of the whole network. As a solution for access network, EPON (Ethernet over Passive Optical Network) is an important technology method which can implement broadband and muti-services access. It combines the advantage of Pon technology and Ethernet technology . With its features of high bandwidth, low cost and being used and updated easily, EPON is the best solution for access network.In order to guarantee EPON to operate steadily and efficiently, it is important to provide a reliable Element Management System (EMS). The thesis develops the EMS on the basis of EPON. Firstly, the thesis studies the structure of EPON referring to IEEE802. 3ah, and introduces Network Management Protocol. Based on the characteristics of EPON system, software structure of the EMS is designed. SNMP cooperates with OAM to realize the management of EPON. In Manager and Agent the "simple and shortcut" SNMP is adopted to develop the application program. In Manager four functions are implemented: the configuration management, performance management, fault management and security management. And the Graphic User Interface is achieved to make the administrator' s operation simple. The function of SNMP Manager is encapsuled into DLL to be provided to GUI and background polling program. Agent runs on the embedded system, so embedded database system BDB, which was developed by Berkeley University, is used to design MIB. The BDB not only saves the storage space, enhance query efficiency, but makes the design of program simple. Finally, the EMS is tested on the development board, aiming at the main functions, such as User Management, Interface Management, Performance Management, Fault Management and Log Managementetc. Testing result is good and the EMS can run normally. The improvement directions of EMS are pointed out at last in the theis.