Abstract: It is difficult to apply the current P2P network service to the business fields without QoS guarantee. This paper introduces QoS attributes into the P2P network and proposes a service composition model, gives a computing method of service composition, proposes an improved genetic algorithm, and provides the solving procedure to satisfy the customer’s service level agreement. A set of experiments show that the proposed model and algorithms can achieve better performance.

Key words: P2P, service composition, QoS, genetic algorithm

摘要： 现有P2P网络服务缺乏服务质量保证，很难应用于商业领域。该文将服务质量属性引入P2P网络服务，提出P2P网络中服务组合模型，并给出一个基于服务质量的P2P服务组合计算方法。然后提出遗传算法，给出满足用户服务水平协议的服务组合求解步骤。通过实验比较得出，提出的遗传算法求解P2P服务组合计算模型有良好的时间性能。

关键词: P2P, 服务组合, 服务质量, 遗传算法

CLC Number: 

• TP311