基于Chord协议的混合P2P模型

在结构化点对点(P2P)模型中，节点异构性会引起系统的不稳定。针对该问题，结合混合P2P模型的优点，构造一个基于Chord协议的混合P2P模型，将节点按处理能力分为超节点和普通节点，多个超节点被组织到同一个群组中，由超节点管理普通节点以提高系统稳定性。该模型采用基于拓扑感知的搜索算法，能较好地解决分布式哈希表(DHT)技术的路由绕路问题。实验证明，该模型在一定程度上降低查询延时，可提高查询效率。

Hybrid P2P Model Based on Chord Protocol

Aiming at the system instability of structured P2P model which is caused by the heterogeneity of nodes in model, this paper proposes a Hybrid Structure P2P network based on the Chord(HSChord). The model is combined with the advantages of hybrid P2P model. According to the nodes’ processing power, it divides nodes into super-nodes and ordinary-nodes. In this model, some super-nodes are organized into the same group, and manage the ordinary-nodes to improve system stability. The model proposes search algorithm which is based on topology-aware. The algorithm can solve the routing detour which is caused by DHT technical inquiries better. Experimental results show that the search algorithm can reduce the query delay and improve the efficiency of query.