Web服务对等联盟组织演化机制  

Evolving mechanism of peer to peer alliance for Web service

作　　者：李文清[1] 张常有[1,2] 曹元大[1] 赵正旭[2] 

机构地区：[1]北京理工大学计算机学院,北京100081 [2]石家庄铁道大学信息科学技术学院,石家庄050043

出　　处：《东南大学学报（自然科学版）》2011年第3期463-467,共5页Journal of Southeast University：Natural Science Edition

基　　金：河北省自然科学基金资助项目(F2009000929);国家自然科学基金资助项目(60873208)

摘　　要：为提高分布式非结构化对等网络中Web服务发现的效率和稳定性,设计了一种以Web服务提供者的服务内容为评价依据的对等联盟演化机制.根据该机制,服务提供者依据各自提供的Web服务内容之间的相似程度,自发形成联盟.每个提供者维护的同盟表用来保存部分盟友列表,从全局形成服务联盟.服务提供者根据盟友关系将Web服务的描述信息发布给多个盟友,用以提高查询效率,从而构成分布式的Web服务发布体系.针对这种没有超级节点的纯分布式对等联盟,设计了其组织发展演化的动态管理协议.协议参数控制了成员的加入联盟、解除盟约,以及联盟的分裂、合并等自治活动.在大规模动态变化的网络环境下,模拟实验验证了联盟管理协议的有效性和稳定性.In order to improve the efficiency and robustness of the Web service discovery process in the distributed peer-to-peer network,an alliance-based peer-to-peer network management mechanism is designed based on the content similarity among Web service providers.By measuring the similarity among service contents provided by each provider,the similar providers are clustered into the same alliance by autonomy.An alliance-list in each provider is built to contain several（not all） members＇ information in the same alliance,called direct membership.According to the alliance-list,Web service descriptions are published to the alliance members in direct membership.In this way,the distributed Web service discovery mechanism is constructed.And,a dynamic self-management protocol is designed.Parameters of this protocol control the processes of member joining,membership revoking,alliance splitting and alliance merging.The experimental results show that the protocol is efficient and robust in a large system scale.

关 键 词：WEB服务 对等联盟 演化机制 

分 类 号：TP393.104[自动化与计算机技术—计算机应用技术]