中文摘要：

移动P2P网络具有高度动态性,但节点的频繁移动影响整个网络的可达性,降低了网络的服务质量.为了维护节点的可达性需要减少节点移动时的切换时延,为此文中提出了基于超级节点的分层预切换方法HPH.该方法在基于超级节点分层模型的基础上引入移动IPv6的快速切换的思想,对节点的域间移动采用预切换机制,解决网络中因节点频繁移动而带来的负面影响.仿真结果分析表明,较之传统KaZaA切换方法,HPH方法的切换时延降低了20.5％,丢包率降低了10.2％.

英文摘要：

The MP2P network has the character of highly dynamic. However, frequent movement of nodes affects the entire network reachability, and increases the packet loss rate and reduces the quality of network service. In order to maintain the node reachability, it needs to reduce the ban- dover latency of nodes. According to this, Hierarchical Pre-HandOver method based on super node in MP2P-HPH is proposed in this article. Base on the thinking of fast handover for Mobile IPv6, HPH brings in Pre-HandOver mechanism for node＇s inter-domain to solve the negative im- pact of frequent move of network nodes. The simulation result shows that, compared to the tradi- tional method, HPH reduces handover delay by 20.5%, and decreases the packed losses by 10.2%.