目前互联网发展迅速，网络及网络应用覆盖广泛，网络服务与网络请求数量不断增多。如何有效地利用有限 的计算机资源，提供最大的网络服务是一个值得思考的问题。对等网络作为解决这个问题的一种手段，在开发和使用上存在 一定的局限性。主要表现在平台相对独立，平台数据无法直接共享；移动节点的移动性导致网络的连通不稳定。本文在前人 基础上，提出一种轻量级的P2P 协议框架，通过JXTA 协议将不同的平台联系起来，同时对JXTA 框架进行简化，使它成为一个 能处理移动节点随机移动的轻量级框架。

With rapid development of the Internet , network and network applications cover widely. Besides, network services and network requests increase constantly, so how to effectively use the limited computer resources, providing the largest network service is a problem worth exploring.Peer to peer networks can be used as a means to solve this problem,but there are some limitations in the development and use of P2P network .The peer to peer platform is relatively independent and data can not be shared directly. In addition,the mobility of the mobile nodes leads to the instability of the network.On the basis of previous study,the paper proposes a lightweight P2P protocol framework ,which is connected with different platforms through JXTA protocol . At the same time ,the JXTA framework is simplified,making it a lightweight framework for dealing with mobile node .