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STUDY ON MODELING MOBILE OBJECTS IN DISTRIBUTED COMPUTING ENVIRONMENT

Currently, large quantities of position-aware mobile objects, such as GPS, mobile phone, PDA, various smart vehicles are merging in distributed environment and systems. The real world applications such as Location -Based Services etc. are being developed in an ad hoc fashion. As a result, software technologies that enable the management of positions of distributed mobile objects capable of very large numbers and very frequent changes are in increasingly high demand. We introduce to mobile agent technology for managing mobile objects in a distributed computing environment. The paper firstly presents a framework of management of distributed mobile objects. A Hierarchical Location Schema for the indexing of historic and current positions of distributed mobile objects among nodes is put forward to locate node quickly. Time-stamped E-R model is put forwar d as the basis of data handling to support the schema. Also, mobile agent computing model is proposed for real -time update, load balancing and robust against network troubles. In the model, techniques of naming and addressing are applied and designed. For the purpose of implementation of distributed query processing, two kinds of mobile agents: collaborative agent and information agent are implemented. Taking the examples of real-time tracking simulation and distributed query processing, the proposed method and model are finally applied to demonstrate its effectiveness and robust for the design and development of distributed system.