Implementation and Evaluation of JXTA-Overlay P2P System inHeterogeneous Environments

在通信技术方面，有两种方式：一种是客户机-服务器系统，另一种是P2P系统。近年来，P2P系统的应用越来越多，为P2P系统的研究开辟了一个新的领域。在P2P的研究中，有很多工作是基于JXTA框架的。JXTA平台支持许多P2P服务和应用，用户可以透明地使用它们。我们的平台JXTA-Overlay致力于使用JXTA技术在JXTA之上构建一个覆盖层，提供一组基于JXTA的应用程序中最常用的基本功能。在本研究中，我们提出并实现了许多新的JXTA-Overlay功能，如：对等组功能，对等控制功能，对等组和任务功能，IC-Tag功能，用户存在功能和安全功能。同时，基于智能算法，我们提出并实现了新的功能，资源分配和节点的可靠性。作为应用，我们考虑了Leraning P2P系统，机器人交互系统，车载网络和移动的Ad-Hoc网络。

As communication technologies, there are two approaches: one is Client-Server system and the other one P2P systems. Recently, there are many applications related with P2P systems and they have opened a new field of research. In P2P research, there are many works which are based on JXTA framework. The JXTA platform support many P2P services and applications and the users can use them in a transparent way. Our platform JXTA-Overlayis an effort to use JXTA technology for building an overlay on top of JXTA offering a set of basic functionalities that are most commonly needed in JXTA-based applications. In this research, we proposed and implemented many new functions for JXTA-Overlay such as: Peer-Group function, Peer control function, Peer-Group and Task functions, IC-Tag function, user presence function and security functions. Also, based on Intelligent Algorithms, we proposed and implemented new functions for resource allocation and Peer Reliability. As applications, we considered -Leraning P2P system, Robots interaction system, Vehicular Networks and Mobile Ad-Hoc Networks.