软件定义网络(Software Defined Network,SDN)技术通过控制平面与数据平面解耦,为通信网络优化提供了新思路。分析SDN关键技术特征,探讨传统通信网络在性能、安全和标准化等方面面临的挑战。从架构、技术及安全3个层面提出优化策略,通...软件定义网络(Software Defined Network,SDN)技术通过控制平面与数据平面解耦,为通信网络优化提供了新思路。分析SDN关键技术特征,探讨传统通信网络在性能、安全和标准化等方面面临的挑战。从架构、技术及安全3个层面提出优化策略,通过设计扁平化网络架构提高资源利用效率,提出基于OpenFlow的高效转发机制和软件定义的多队列优先级调度算法,构建纵深信任域安全架构。实验结果表明,该优化方案在高负载条件下的端到端时延降低约59.5%,网络吞吐量提升约33.0%,分布式拒绝服务(Distributed Denial of Service,DDoS)攻击检测时延降低75.9%,显著提升了网络性能。展开更多
Present mobile communication system suffers from the exponentially increased mobile traffic and research on the fifth generation(5G) mobile network architectures is ongoing to solve this problem. We investigate the fe...Present mobile communication system suffers from the exponentially increased mobile traffic and research on the fifth generation(5G) mobile network architectures is ongoing to solve this problem. We investigate the feasibility of the proposals used for the network architecture evolution from 4G to 5G and first propose a compatible network architecture, which decouples the management plane, the control plane and the user plane based on NO Stack framework proposed in our previous study. We mainly design detail procedures including UE attachment, service request and dedicated bearer activation/deactivation for our proposal network architecture. Finally, we establish a clear analytical mode of the application and system states to evaluate the signaling loads of new architecture. Simulation results show that our proposal network architecture with elaborated signaling procedures has much impact on the total signaling loads of system and could obviously decrease the signaling overhead compared with LTE.展开更多
文摘软件定义网络(Software Defined Network,SDN)技术通过控制平面与数据平面解耦,为通信网络优化提供了新思路。分析SDN关键技术特征,探讨传统通信网络在性能、安全和标准化等方面面临的挑战。从架构、技术及安全3个层面提出优化策略,通过设计扁平化网络架构提高资源利用效率,提出基于OpenFlow的高效转发机制和软件定义的多队列优先级调度算法,构建纵深信任域安全架构。实验结果表明,该优化方案在高负载条件下的端到端时延降低约59.5%,网络吞吐量提升约33.0%,分布式拒绝服务(Distributed Denial of Service,DDoS)攻击检测时延降低75.9%,显著提升了网络性能。
基金supported by the Chinas 863 Project (No.2015AA01A706)the National Science and Technology Major Project (No. 2016ZX03001017)+1 种基金the Science and Technology Program of Beijing (No. D161100001016002)the Science and Technology Cooperation Projects (No. 2015DFT10160B)
文摘Present mobile communication system suffers from the exponentially increased mobile traffic and research on the fifth generation(5G) mobile network architectures is ongoing to solve this problem. We investigate the feasibility of the proposals used for the network architecture evolution from 4G to 5G and first propose a compatible network architecture, which decouples the management plane, the control plane and the user plane based on NO Stack framework proposed in our previous study. We mainly design detail procedures including UE attachment, service request and dedicated bearer activation/deactivation for our proposal network architecture. Finally, we establish a clear analytical mode of the application and system states to evaluate the signaling loads of new architecture. Simulation results show that our proposal network architecture with elaborated signaling procedures has much impact on the total signaling loads of system and could obviously decrease the signaling overhead compared with LTE.
