软件定义网络(software-defined networking,SDN)和网络功能虚拟化(network function virtualization,NFV)为电力物联网业务编排提供了实现方法。针对电力物联网时延敏感业务编排问题,首先,提出基于SDN/NFV的电力物联网业务编排架构,满...软件定义网络(software-defined networking,SDN)和网络功能虚拟化(network function virtualization,NFV)为电力物联网业务编排提供了实现方法。针对电力物联网时延敏感业务编排问题,首先,提出基于SDN/NFV的电力物联网业务编排架构,满足定制化需求。然后,考虑多虚拟网络功能(virtual network function,VNF)嵌入、服务功能链(service function chain,SFC)有序性、以及电磁干扰影响,提出基于升价匹配的多阶段多对一VNF嵌入(pricing matching-based multi-phase many to one VNF embedding,PMVE)算法,在每个阶段实现不同SFC链上排序相同的VNF集合与物理节点集合间的匹配,从而最小化业务服务总时延。最后,通过算例验证了方法的可行性和有效性,仿真结果表明,相较于传统的双边匹配算法,所提算法可降低业务服务总时延29.9%、降低平均等待时延36.1%,保障电力物联网时延敏感业务需求。展开更多
Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principle...Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principles of the model were presented to guarantee the correctness and efficiency for process transformation.As a case study,the EPEM descriptions of Web Services Business Process Execution Language(WS-BPEL) were represented and a Process Virtual Machine(PVM)-OncePVM was implemented in compliance with the EPEM.展开更多
在电力系统和能源互联网的深度融合大背景下,电力通信网融合第五代移动通信技术(fifth generation mobile communication technology,5G)成为一种必然趋势,5G电力通信网业务编排成为支撑电力业务服务质量需求的关键手段。针对电网中现...在电力系统和能源互联网的深度融合大背景下,电力通信网融合第五代移动通信技术(fifth generation mobile communication technology,5G)成为一种必然趋势,5G电力通信网业务编排成为支撑电力业务服务质量需求的关键手段。针对电网中现有业务编排优化存在的不足,提出了一种基于软件定义网络(software defined network,SDN)的5G电力通信网业务编排自主决策方法,利用Sarsa(state action reward state action)算法,通过不断与环境交互,在信息不确定的情况下实现接入网信道选择与核心网路由选择的联合优化,从而最小化电力通信终端数据包传输总时延,为电力业务超低时延需求提供保障。仿真结果表明,所提算法能够在传输环境突变的情况下,保持较低传输总时延,并降低波动,有效地提高了电力业务的传输质量。展开更多
Service orchestration plays a vital role in assembling services into business processes in a Service Oriented Architecture.In current practices,the orchestrating logic is usually described by a process language,which ...Service orchestration plays a vital role in assembling services into business processes in a Service Oriented Architecture.In current practices,the orchestrating logic is usually described by a process language,which is therefore separated from the services in the system implemented by certain programming language.It introduces two issues:1)It cost additional efforts for developers to be proficient with a new process language/script,and its running environment.2)It causes development performance degradation due to transformation efforts for process language and programming language,such as transforms Java services into web services.To overcome these issues,this paper proposes a novel alternative system which takes advantage of the annotation construct of Java programming language to represent business processes.Through the experiments,we found that developers can efficiently develop business processes based on their current proficient programming language skill using the proposed system to achieve the service orchestration.展开更多
文摘软件定义网络(software-defined networking,SDN)和网络功能虚拟化(network function virtualization,NFV)为电力物联网业务编排提供了实现方法。针对电力物联网时延敏感业务编排问题,首先,提出基于SDN/NFV的电力物联网业务编排架构,满足定制化需求。然后,考虑多虚拟网络功能(virtual network function,VNF)嵌入、服务功能链(service function chain,SFC)有序性、以及电磁干扰影响,提出基于升价匹配的多阶段多对一VNF嵌入(pricing matching-based multi-phase many to one VNF embedding,PMVE)算法,在每个阶段实现不同SFC链上排序相同的VNF集合与物理节点集合间的匹配,从而最小化业务服务总时延。最后,通过算例验证了方法的可行性和有效性,仿真结果表明,相较于传统的双边匹配算法,所提算法可降低业务服务总时延29.9%、降低平均等待时延36.1%,保障电力物联网时延敏感业务需求。
文摘Current orchestration and choreography process engines only serve with dedicate process languages.To solve these problems,an Event-driven Process Execution Model(EPEM) was developed.Formalization and mapping principles of the model were presented to guarantee the correctness and efficiency for process transformation.As a case study,the EPEM descriptions of Web Services Business Process Execution Language(WS-BPEL) were represented and a Process Virtual Machine(PVM)-OncePVM was implemented in compliance with the EPEM.
文摘在电力系统和能源互联网的深度融合大背景下,电力通信网融合第五代移动通信技术(fifth generation mobile communication technology,5G)成为一种必然趋势,5G电力通信网业务编排成为支撑电力业务服务质量需求的关键手段。针对电网中现有业务编排优化存在的不足,提出了一种基于软件定义网络(software defined network,SDN)的5G电力通信网业务编排自主决策方法,利用Sarsa(state action reward state action)算法,通过不断与环境交互,在信息不确定的情况下实现接入网信道选择与核心网路由选择的联合优化,从而最小化电力通信终端数据包传输总时延,为电力业务超低时延需求提供保障。仿真结果表明,所提算法能够在传输环境突变的情况下,保持较低传输总时延,并降低波动,有效地提高了电力业务的传输质量。
文摘Service orchestration plays a vital role in assembling services into business processes in a Service Oriented Architecture.In current practices,the orchestrating logic is usually described by a process language,which is therefore separated from the services in the system implemented by certain programming language.It introduces two issues:1)It cost additional efforts for developers to be proficient with a new process language/script,and its running environment.2)It causes development performance degradation due to transformation efforts for process language and programming language,such as transforms Java services into web services.To overcome these issues,this paper proposes a novel alternative system which takes advantage of the annotation construct of Java programming language to represent business processes.Through the experiments,we found that developers can efficiently develop business processes based on their current proficient programming language skill using the proposed system to achieve the service orchestration.
