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教育资源网格中资源的描述与组织技术
  • ISSN号:1005-3751
  • 期刊名称:计算机技术与发展
  • 时间:0
  • 页码:59-62
  • 语言:中文
  • 分类:TP393.1[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]
  • 作者机构:[1]山东师范大学信息与工程学院,山东济南250014
  • 相关基金:国家自然科学基金资助项目(90612003)
  • 相关项目:基于因特网的教育资源网格体系结构和服务理论研究
作者: 刘方爱|马艳|
中文摘要:

最近几年来,越来越多的P2P系统应用于传统的网络来实现大规模的文件分享。这些平台大多有如下特点:完全分布式、自组织、自恢复,这使得在移动Ad—hoc网络中也逐渐出现相关的应用。然而,传统的协议栈采用的是分层式结构,由于移动Ad-hoc网络高度动态性等特点影响这些协议的性能,这种结构在该网络中效率低下。文中通过对移动Ad—hoe环境下的Gnutella协议的性能的各方面分析与研究,发现Gnutella协议直接用于该环境并不理想。因此。提出了一种跨层接口的优化机制,实现网络层的TBRPF路由协议与应用层的Gnutella协议实现有效信息的互通。最后,通过模拟实验说明比预想的性能要好,适合自组织及自恢复的Ad—hoc网络。

英文摘要:

In recent years, more and more P2P systems have been applied in traditional network for large-scale file sharing. Most of these platforms had the following characteristics: fully distributed, self-organization, self-recovery. This maked related application also appeared gradually in mobile Ad-hoc network. Hierarchical structure was used in the traditional protocol stack, however, the high dynamic characteristic influenced the performance of the protocols, which was low efficiency in mobile Ad-hoc network. It studied and analyzed the performance from different aspects of Gnutella protocol in mobile Ad-hoc network, found that using Gnutella directly in this environment is unsatisfactory. Therefore,presented an optimization mechanism:the interface used for cross-layer, to ensure TBRPF routing protocol and Gnutella protocol communicated effective information with each other. Finally, the simulation demonstrated that the performance was better than expected and was suitable for the mobile Ad-hoc network.

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