The Research And Implementation Of JXTA-based P2P Distance Teaching System

Modern distance education is a new kind of education form that has emerged along with the development of modern information technology, and distance teaching system is an important component part of distance education. At present, all mature design of distance teaching system has been based on C/S (B/S) technique. Today P2P network has got more and more popular, and compared to C/S (B/S) technique, it has many advantages such as good scalability, strong robustness, high resource utilization and less investment.JXTA is an open P2P project by Sun Corp begun at Apr.2001. Its target is to extract the general requirements from all P2P systems, so as to create common underneath protocols, which are used to normalize and standardize all kinds of P2P core, services and applications.This project has made research and discussed on JXTA-based P2P Distance Teaching System (JBDTS). The author's paper work mainly includes:Studying the present situation of distance education in home and abroad, expatiating the features and developing techniques of the present distance teaching system, comparing C/S mode to P2P mode in implementation and analyzing the advantages of P2P-based distance teaching system.Giving out a scheme outline to JBDTS, and making the research and analysis to its new characteristics and applied new technique.Making the analysis to JBDTS prototype system, the system overall design and the function modules design, under the framework of JXTA-based P2P Distance Teaching System.Discussion on detailed implementation schemes to JXTA-based P2P Distance Teaching System JBDTS. We proposed peer group with password membership services, and implementation algorithm of joining in the peer group was put forward. We researched the theory of instant communication between peers, and gave the key algorithm of communication between two peers and many peers. By utilizing Content Management Service (CMS) , we can share, search and download files in a peer group. According to the Computer Supported Cooperative Work (CSCW) technique, the Virtual Classroom Teaching subsystem using electronics whiteboard is completed.Finally, testing and analyzing the test results to JBDTS prototype. Verifying the original designing thoughts, and giving out a conclusion.