Discussion on the Web Model in the Broadband Access Network

I like the knowledge of broadband access networks very much. I also like to summarize the discussion about the Web model in broadband access networks. Let's talk about this in detail. In the TMN Network management layer, the client does not need to know the location of the real-time device because of the adopted CORBA architecture. Therefore, the client can call the management method implemented by the Device Manager to complete user operations.

Currently, the development platform of CORBA, such as the Orbix product of INOA, provides comprehensive underlying services. As long as the network administrator manages devices, the development task can be completed. Although TMN adopts an object-oriented modeling technology based on OSI system management, TMN has not studied how to construct a management system and how managers can implement interoperability. At present, CORBA is a mature object-oriented technology, which will be widely used in the rapid construction of services and effective management of resources and services in an open network environment.

To implement integrated network management for broadband access networks, a complete set of architecture standards such as TMN and a development platform and development tool for this architecture are also required. Currently, the TMN Network Management Platform lacks specific TMN Management components and basic components supporting distributed applications. These are the key to constructing large-scale network and business management applications using object-oriented and software reuse technologies. Therefore, taking ORB Object Request proxy of CORBA as the core, combined with the current distributed object architecture and related network and business management technologies, A new generation distributed TMN Network management platform that is more distributed, reusable, highly reliable, and scalable and suitable for the entire TMN layered architecture can be constructed. In CMA-based distributed TMN Network Management Platform, components other than ORB core exist as component blocks, and all components interface externally in the same way, use the IDL language to describe the services it provides.

In short, most of the technologies such as CORBA and TINA are immature and have not yet formed the corresponding industry standards. It takes a long time to replace TMN/Q3, Which is mature and functional. However, the advantages of CORBA are outstanding, especially the powerful functions than CMIP and SNMP, which are not as complex as the latter and especially suitable for distributed processing. Although it is not proposed for network management, but it has gained widespread attention and application in the field of network management, so it will certainly occupy a certain position in future applications.

Web Model

The Web or WWW technology provides a new idea for network management innovation. Web is a distributed, dynamic, and multi-platform interactive hypertext information system technology. XML is called the Second Generation Web technology. cross-platform JAVA programming plays an important role in Web applications and XML parsing processing; based on the Object Web technology combined with JAVA or CORBA and JAVA, cross-platform Web database access can be realized. The platform independence of Web technology can solve the interoperability problem caused by multi-platform structure. Introducing Web technology into network management can provide users with flexible management methods. Management personnel can use Web browsers to access the management system from anywhere and anytime, monitor, configure, and manage their networks. The entire Web system can be divided into three levels based on the completed functions: the terminal user operation layer), the device/network management layer, and the device layer network element ), the last two layers have roughly completed the functions of network element/Network Element Management/Network Management in TMN.

The device/network management layer is the core layer, which is divided into two parts: the Device Manager responsible for device management and the centralized controller responsible for coordination and centralized management. The Device Manager is a management system for various devices. It manages network elements and networks in TMN. They use their respective management interfaces as common SNMP management methods and CORBA methods in computer networks, it can also be a CMIP-based Q3 interface or a network that is directly embedded in the system/device and can manage one or more network elements NE. The centralized controller integrates the management functions of each Device Manager. You can use the centralized controller to perform various management operations. This capability of the centralized Controller ensures centralized operation and comprehensive management of the entire network. The centralized controller is also responsible for internal management of the entire management system, including Web access operation management, user management, network security monitoring, and device targeting.

The information interaction between the centralized controller and the Device Manager adopts the data public interface defined in XML. Both management functions and management operations are defined in XML. The centralized Controller connects to each Device Manager through the Intranet to form a complete integrated management system for access networks. The Device Manager provides the required management information to the centralized controller, on the other hand, the Web server provides unique device management functions. This capability enables synchronization between network management and network construction. In the old management mode, you must wait for the standardization of the Management Information Model before centralized management is implemented, it can greatly shorten the development time. With the development of the Internet and people's awareness of the Internet, the Web-based network management system will be the mainstream of network management technology in the future.

The access network technology is complex and diverse, and the management system of the broadband access network is required to have comprehensive functions and variability. The broadband access network technology must ensure the sustainable construction of the access network and have high adaptability requirements on the network management system. With the rapid development of broadband access, the technologies used by the Network Management System of the broadband access network, the network management system that combines wide and narrow band networks, the network management system of the access network, and the integration of other network management systems in the domestic network will be the focus of the network management system of the broadband access network in the future.