Research On Key Technologies Of Dtv Front-End Network Management

With the comprehensive digitalization of broadcasting and television systems, the scale of the digital television networks has been expanding. DTV front-end system which is the core part of the DTV network is responsible for the digital television signal’s processing and handshaking, which has focused a lot of critical devices. Due to the large amount of these devices, which are produced by different manufacturers, using discrepant technology, an effective management of these devices is urgently necessary for the network construction. An independent network management system was implemented on each device in the early stage of the network construction, but with the increasing number of devices, there causes a lot of redundancy in this way, therefore, the development of integrated network management is very necessary.Integrated network management that is SNMP-based (Simple Network Management Protocol) establishes the unified management mechanism for all the devices in the network through a network management process on the server. This provides distributed services for network administrators, maximizing the utilization of network resources.However, DTV front-end network management faces many problems. First, because the network includes digital television equipment, routers, gateways, server and many other elements, the maintenance of the DTV equipment network topology and the monitoring of the equipment status become key constraints of network management. Second, devices in the network are produced by different manufacturers, although most of them support the SNMP protocol, but there are large differences in the MIB object definition and the design of the PDUs, which become key constraints of the network management’s compatibility and scalability.The entry point in this paper is the background of development of DTV front-end system and its network management. First, introduce the related technologies used in the research. Next, do research on the DTV front-end network management model, carry out the system demand analysis based on the characteristics of the system and discuss the key issues including topology maintenance and compatible management for devices in the network management as well as offer MIB tree generation algorithms and solutions for device topology polling. Then, present modular design of the network management station software which is designed for six modules including server management, equipment alarm management, third-party device support, equipment parser, database and front-end display. What’s more, make detailed discussions on the design ideas for these modules, and develop the network management station software combined with solutions of the key issues and the software design. Finally, some comprehensive summary and outlook are given.At this stage, both research and development work for this subject has been completed, and finished functional testing in existing DTV front-end system, and gains significant achievements in improving the efficiency of network management.