| As the expansion of network scale and the service provided by it becomes more complex, the traditional pattern of network management and information retrieval scheme becomes more and more difficult to meet the needs of network users. Thus, the researches on distributed network management have been outspreaded from different aspects to obtain a network management system that is distributed, scalable, operational and information self-adaptive retrieval. In this background, network management technique based-on CORBA(Common Object Request Broker Architecture) appears, which quickly becomes the hotspot in many fields such as OMG(Object Management Group), telecommunications, network management, and distributed object technology etc.This paper fully studies the different aspects of network management technique based-on CORBA, and its main achievements are as follows:1. As CORBA does not provide the function of scope, filtering and multi objects or attributes to access, which will cause too much traffics and violate such principle as that management traffic can not affect more on network performance, Combined with the advantages of CORBA and OSI management, This article has put forward a MHNM (Multi-Hierarchy Network Management) Architecture in the domain of the management of telecommunications network, using pseudo-Agent distributed management and grouping managed objects to cache. It has assured the performance of network management by providing multi object or attributes quick access.2. As the scheme of information arrangement of CORBA is flat file style, which handles querying, deleting, and inserting information inefficiently compared to OSI. A tree structure of managed objects arrangement like MIB(Management Information Base) has been used to provide efficient operation on managed objects. In addition, arrangement, definition, implementation and finding schemes for CORBA managed objects are also given by the tree structure.3. As there are up to 106 managed objects on element level of TMN (Telecommunications Management Network) in telecommunications network, and the scheme to collect management information affects the performance of network management, A new algorithm-SAA (Self-Adaptive Algorithm) used for retrieving multi objects information has been put forward in this thesis. SAA can adjust the retrieving objects and interval of retrieval self-adaptively by using the schemes of self-adaptivity, fault tolerance, recognition status of object dynamically etc., and thus can use fewer network resources without alteration of SNMP(Simple NetworkManagement Protocol), IIOP(Internet Inter-Operability Protocol) or CMIP(Common Management Information Protocol).4.To decrease the usage of network resources by network management systems even more, combined with the fact that the performance of network management is affected by the scheme to collect management information, A new algorithm-GPA (Group-Prefetching Algorithm) has been put forward used for retrieving management information from the element level in heterogeneous WAN (Wide Area Network). GPA can adjust many little retrieving objects into one prefetching group to access by using the schemes of group prefetching, objects of group changed self-adaptively, fault tolerance etc., and thus can decrease the frequency of retrieval, use fewer network resources and decrease the network overhead without alteration of IIOP, SNMP or CMIP too.5.In the background of the design and implementation of network management system for the local network of China Mobile, we have analyzed and designed detailedly the key technique, approach and software architecture of a practical network management system based on StarBus, which use MHNM architecture, the scheme of managed objects arrangement, SAA, GPA and practical skills achieved when we developed China Post and China Broadcast and TV network management systems.In the end, we summarize the main achievement of this paper and state some further work in the future.
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