摘要
现有的服务组合方法多是获取候选服务节点的信息,在集中式组合引擎上搜索路径。这种集中式方法不仅具有单点失效、可扩展性差等缺点,而且候选服务的QoS没有保证,服务搜索空间过大,组合效率较低。文章提出了一种分布式的服务组合方法(BDDSC),将分散在网络中性能有保证的服务节点构建成服务覆盖网络,使各个节点协作执行进行动态服务组合,可以进行保证QoS的服务组合,生成满足用户QoS要求的路径。实验表明,本文提出的方法有效且具有较高的服务组合成功率。
Most of current service composition methods search paths on a centralized composition engine using the information of the candidate service node.These centralized methods have the shortages of single point failure,poor expandability,the quality of candidate services unable to be assured,excessive search space,and lower composition efficiency.In this paper a distributed composition method（BDDSC） is proposed,which makes up Service Overlay Network with service nodes that are scattered in the network and have guaranteed QoS,collaborates nodes to carry out dynamical service composition,so that carry out service composition that can guarantee QoS,and generates paths satisfying users＇ QoS needs.Experiment shows the proposed BDDSC algorithm is effective and has high composition success rate.
出处
《电子技术（上海）》
2011年第8期7-9,3,共4页
Electronic Technology
基金
国家863计划信息技术领域"新一代业务运行管控协同支撑环境的开发(2008AA01A317)"
关键词
对等网络
服务覆盖网
服务组合
服务质量
peer to peer network
service overlay network
service composition
QoS
