中文摘要：

从无线自组织网络特点及其资源发布并发现的特性出发，提出了分布式的覆盖网络资源发现算法PARD.PARD以哈希资源名称作为路由地址，利用覆盖网络技术，使资源信息分布存储在多个节点上，提高了整个网络的负栽均衡能力．通过代理及本地技术，使得时1个附近节点的资源查询尽量不需和远端节点通信，最大程度地避免了全网范围的信息洪泛，有助于网络的扩展和管理．实验结果表明，PARD算法具有良好的稳定性和可扩展性．与Broadcast算法相比，PARD算法能有效的降低网络流量，提高了网络的效用和性能．

英文摘要：

This essay, from the characteristics of the distributing and discovering of the wireless Ad Hoe network resources, further proposes PARD, a resource discovery algorithm based on Overlay Network. Under the Overlay Network technology, PARD distributes and stores information resources in multiple nodes of different domain according to the network conditions and nodes＇ state so that the que- ry of a nearby node could avoid as much communication with a remote one as possible. Using agent and local technology, it not only improves the overall network load balancing, but avoids the flooding of the whole network to the maximum, which is helpful for the network extension and management. The simulation experiment results show that PARD has good stability and scalability. Compared with other algorithms, PARD can reduce network traffic effectively. PARD also improves the network utility and performance.