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Research on Real-Time Collaboration Mechanism in National Key Discipline Grid

Author: QianFeng
Tutor: WuSong
School: Huazhong University of Science and Technology
Course: Computer System Architecture
Keywords: Grid Joint Web 2.0 Difference Synchronous
CLC: TP311.52
Type: Master's thesis
Year: 2007
Downloads: 38
Quote: 1
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Abstract


For one key disciplines, different colleges and universities or research institutions have certain personnel in the research, personnel exchanges between universities undoubtedly of great significance to reduce duplication of research, to promote the development of disciplines. However, subject to geographical and funding, personnel exchanges between the same discipline is not enough. The traditional video conferencing implementation difficulties due to the deployment, costly and inconvenient to use reason and can not be a good solution to the above problem. In order to solve the above problems, the key disciplines grid based on Web 2.0 real-time collaboration system NKDCollab (National Key Discipline Grid Collaboration System) in the Internet environment, discipline researchers collaborate in real time in the form of a service exchange mechanism and use user-generated data, to better serve researchers and disciplines construction. Using a collaborative model To achieve collaborative system scalability, work together to give the elements as well as collaborative activities between the different stages of the control and data flow. Based on the characteristics of the dynamic changes in continuity of the screen, a screen based on the difference between the acquisition algorithm is used to optimize the meeting presenter screen picture, the transmission so as to enhance the user experience shared desktop and applications. In order to better achieve synchronization, synchronization and understanding of the various different needs to achieve future scalability of the system, a multimedia synchronization method based on three multimedia synchronization model; using an audio and video system synchronization algorithms to solve synchronization problems between the media. Browser to use the system to both user-friendly, but also complex collaborative services to achieve a combination of Flash, Ajax and ActiveX technology, and server-side data exchange using lightweight JSON for media files on a media server through automatic migration of data to the user-friendly online on-demand. By providing meeting information and resource information XML services mashup, and given to the developers call the Flash player client. NKDCollab system testing and analysis. Functional testing of the main function of the system provides test results prove that the system under the premise of ensuring the availability of the various functions relatively better ease of use Access Grid. Main test system in the real meeting scenario server-side data, focusing on analysis of network traffic data between the tested server demand for bandwidth and the number of participants from the two aspects of performance test system, a system platform performance testing relationship. Get algorithms for testing the difference screen when the screen changes cycle 1s, the amount of data transferred, only 9.65% of the entire screen to obtain processing, the processing time of only 55.47% of the progressive difference algorithm.

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