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

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

CLC Number: 

• TP393.09