兴趣域信任相似度敏感的P2P拓扑构建模型

A P2P Topology Construction Model Sensitive to Interest Domain Trust Similarity

为了提高对等(P2P)网络系统中资源定位效率,保证资源下载质量,基于P2P网络中节点偏好的兴趣域划分机制,给出了兴趣域信任相似度的概念和计算方法,并在此基础上设计实现了一种基于兴趣域信任相似度的对等网络拓扑(ITAPT)模型.ITAPT模型通过引入节点间的兴趣域信任相似度,使具有相近兴趣偏好且兴趣域可信度向量相似的节点互为邻居,提高了节点资源查询效率,同时又能激励节点提供更多贡献.仿真结果表明,该模型在拓扑有效性和安全性等方面比现有典型机制均有较大提高.

To improve the resource location efficiency and guarantee resource download quality of peer to peer （P2P） system, a new concept of interest domain trust similarity as well as its computation method is given based on Interest domain partition mechanism using node Interest bias in P2P Networks. Thereupon, a P2P network topology construction model named interest domain trust similarity sensitive P2P topology （ITAPT） is implemented. In ITAPT, by computing interest domain trust similarity of each other, the nodes with similar interest and trust value are connected as neighbors. Thus the ITAPT will improve node resource query efficiency, and provide an incentive mechanism to encourage node to offer more contribution so as to get better service. Simulations show that the ITAPT improves the efficiency and security of P2P topology effectively.