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计算机工程 ›› 2008, Vol. 34 ›› Issue (4): 280-282.doi: 10.3969/j.issn.1000-3428.2008.04.100

• 开发研究与设计技术 • 上一篇    下一篇

分布式远程教育资源网的设计及通信机制

白翔宇1,2,3，叶新铭1,2，蒋 海1,3，李 军1   

  1. (1. 中国科学院计算技术研究所，北京 100080；2. 内蒙古大学计算机学院，呼和浩特 010021；3. 中国科学院研究生院，北京 100049)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-02-20 发布日期:2008-02-20

Distributed Resource Network Design and Communication Mechanism in Distant Education

BAI Xiang-yu1,2,3, YE Xin-ming1,2, JIANG Hai1,3 , LI Jun1   

  1. (1. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080; 2. College of Computer, Inner Mongolia University, Hohhot 010021; 3. Graduate College, Chinese Academy of Sciences, Beijing 100049)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-02-20

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摘要： 远程教育是互联网中的重要应用，分布式的资源组织模式与大范围的教育受众覆盖是部署实施的关键。该文通过分布式资源网以实现资源共享，给出资源发布的通信过程和方法，研究了提高资源同步效率的端系统组播机制，设计了兼容IPv4和IPv6的 IPDVB传输系统，用来满足向卫星接收终端用户递送资源的需求。

关键词: 远程教育, 分布式资源网, 端系统组播

Abstract: Distant education is an important and popular application for Internet. Distributed resource management and its communication mechanism for resource distribution are of great significance for wide deployment. A heterogeneous distributed resource network composed of terrestrial links and satellite channels is proposed to achieve resource management and distribution. Procedure of resource release is analyzed and a general model is given. End-system multicast method is presented to enhance the efficiency of resource synchronization. IPv4/IPv6 over DVB transmission system is designed for delivering resource to countryside users.

Key words: distant education, distributed resource network, end-system multicast

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