Recently, integrating Softwaredefined networking(SDN) and network functions virtualization(NFV) are proposed to address the issue that difficulty and cost of hardwarebased and proprietary middleboxes management. Howev...Recently, integrating Softwaredefined networking(SDN) and network functions virtualization(NFV) are proposed to address the issue that difficulty and cost of hardwarebased and proprietary middleboxes management. However, it lacks of a framework that orchestrates network functions to service chain in the network cooperatively. In this paper, we propose a function combination framework that can dynamically adapt the network based on the integration NFV and SDN. There are two main contributions in this paper. First, the function combination framework based on the integration of SDN and NFV is proposed to address the function combination issue, including the architecture of Service Deliver Network, the port types representing traffic directions and the explanation of terms. Second, we formulate the issue of load balance of function combination as the model minimizing the standard deviations of all servers' loads and satisfying the demand of performance and limit of resource. The least busy placement algorithm is introduced to approach optimal solution of the problem. Finally, experimental results demonstrate that the proposed method can combine functions in an efficient and scalable way and ensure the load balance of the network.展开更多
针对列车通信网络制式单一、地理环境差、数据安全可靠传输难以得到保证的现状,调研铁路系统各业务的通信需求,提出一种基于软件定义网络(SDN,software defined network)和网络功能虚拟化(NFV,network functions virtualization)的铁路...针对列车通信网络制式单一、地理环境差、数据安全可靠传输难以得到保证的现状,调研铁路系统各业务的通信需求,提出一种基于软件定义网络(SDN,software defined network)和网络功能虚拟化(NFV,network functions virtualization)的铁路系统空天地融合网络体系架构。通过集中控制器管理底层铁路系统的物理设施,实现应用程序与物理基础设施的解耦,讨论了体系架构的设计细节,并对架构的协议需求、功能需求以及信息流等展开综述,给出空天地融合网络与其他单一制式网络覆盖的性能对比分析,并简要讨论了目前待解决的问题及解决方向。展开更多
基金supported by the Foundation for Innovative Research Groups of the National Science Foundation of China (Grant No.61521003)The National Basic Research Program of China(973)(Grant No.2012CB315901,2013CB329104)+1 种基金The National Natural Science Foundation of China(Grant No.61372121,61309019,61309020)The National High Technology Research and Development Program of China(863)(Grant No.2015AA016102,2013AA013505)
文摘Recently, integrating Softwaredefined networking(SDN) and network functions virtualization(NFV) are proposed to address the issue that difficulty and cost of hardwarebased and proprietary middleboxes management. However, it lacks of a framework that orchestrates network functions to service chain in the network cooperatively. In this paper, we propose a function combination framework that can dynamically adapt the network based on the integration NFV and SDN. There are two main contributions in this paper. First, the function combination framework based on the integration of SDN and NFV is proposed to address the function combination issue, including the architecture of Service Deliver Network, the port types representing traffic directions and the explanation of terms. Second, we formulate the issue of load balance of function combination as the model minimizing the standard deviations of all servers' loads and satisfying the demand of performance and limit of resource. The least busy placement algorithm is introduced to approach optimal solution of the problem. Finally, experimental results demonstrate that the proposed method can combine functions in an efficient and scalable way and ensure the load balance of the network.
文摘计算机与网络技术的发展,使得大部分行业已经进入深度的网络融合应用阶段。计算机网络的高性能和高效率在为人类社会带来福利的同时,也因网络安全问题给社会运转带来威胁。特别是随着诸如网络功能虚拟化(Network Functions Virtualization,NFV)、软件定义网络(Software Defined Network,SDN)等技术得以实施和应用的今天,迥异于传统物理网络结构的虚拟化网络,使得人们在应对网络安全问题时面临新的挑战,特别是在网络安全态势预测方面。基于此,针对NFV与SDN高度融合环境下的网络安全态势预测方案进行研究和探讨,构建编码网络模型,对该环境下的网络安全态势要素进行提取,并利用基于注意力机制的循环门控单元预测方法,建立网络模型,以实现网络安全态势预测。该方案弥补了传统网络安全态势预测方案在准确度、适应性等方面的不足,期望能够为网络安全态势预测的相关研究与应用提供帮助。
文摘针对列车通信网络制式单一、地理环境差、数据安全可靠传输难以得到保证的现状,调研铁路系统各业务的通信需求,提出一种基于软件定义网络(SDN,software defined network)和网络功能虚拟化(NFV,network functions virtualization)的铁路系统空天地融合网络体系架构。通过集中控制器管理底层铁路系统的物理设施,实现应用程序与物理基础设施的解耦,讨论了体系架构的设计细节,并对架构的协议需求、功能需求以及信息流等展开综述,给出空天地融合网络与其他单一制式网络覆盖的性能对比分析,并简要讨论了目前待解决的问题及解决方向。
