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
中图分类号:
白翔宇;叶新铭;蒋 海;李 军.
分布式远程教育资源网的设计及通信机制
[J]. 计算机工程, 2008, 34(4): 280-282.
BAI Xiang-yu; YE Xin-ming; JIANG Hai; ; LI Jun. Distributed Resource Network Design and Communication Mechanism in Distant Education[J]. Computer Engineering, 2008, 34(4): 280-282.