基于Petri网的网络服务自动组合方法研究

Study on a Petri Net-Based Network Service Automatic Composition Method

针对网络服务的自动组合问题,提出了一种考虑端系统输入/输出请求的自动组合方法。将网络服务功能转化为Petri网中的变迁,输入请求与输出期望转化为库所;构建3种网络服务组合模型,通过对这些基础组合模型的再组合及分析,可以实现更复杂、功能更优的网络服务组合。通过T向量技术可判定是否存在满足用户需求的网络服务组合。

A Petri Net-based network service automatic composition method is proposed to composite the network service. Network service function is translated into the transition of Petri Net, which serves as the in- put place and out place of the corresponding input request and output expectation. Three types of network serv- ice composited models are presented, from which complexity network service composition can be realized through further combination and analysis. The T--vector can be used to determine whether there is a combina- tion which satisfy the user＇s input/output requirements.