Software defined networking( SDN) offers programmable interface to effectively control their networks by decoupling control and data plane. The network operators utilize a centralized controller to deploy advanced net...Software defined networking( SDN) offers programmable interface to effectively control their networks by decoupling control and data plane. The network operators utilize a centralized controller to deploy advanced network management strategies. An architecture for application-aware routing which can support dynamic quality of service( Qo S) in SDN networks is proposed. The applicationaware routing as a multi-constrained optimal path( MCOP) problem is proposed,where applications are treated as Qo S flow and best-effort flows. With the SDN controller applications,it is able to dynamically lead routing decisions based on application characteristics and requirements,leading to a better overall user experience and higher utilization of network resources. The simulation results show that the improvement of application-aware routing framework on discovering appropriate routes,which can provide Qo S guarantees for a specific application in SDN networks.展开更多
针对异构融合网络中不同网络的Qo S和映射问题,解决分类和映射方法是提出Qo S参数映射模型。在充分研究现有异构网Qo S参数映射方法的基础上,提出了Qo S参数映射三维模型(Three-dimensional Model for Qo S Parameter Mapping,Qo S-TMP...针对异构融合网络中不同网络的Qo S和映射问题,解决分类和映射方法是提出Qo S参数映射模型。在充分研究现有异构网Qo S参数映射方法的基础上,提出了Qo S参数映射三维模型(Three-dimensional Model for Qo S Parameter Mapping,Qo S-TMPM),模型采用颗粒度适中、区分度较大的Qo S分类关键参数进行搭建。同时,基于Qo S参数映射三维模型的Qo S参数映射方法能顺利地完成异构网络间的Qo S参数映射,仿真结果表明Qo S参数模型和参数映射方法能改善Qo S保证服务,从而提高用户的业务体验质量。展开更多
针对认知无线Mesh网络传统的多约束QoS组播路由算法一贯的进行随机初始化种群这一问题,在没有增加智能算法的复杂度的同时,首次将武器-目标分配问题(weapon to target allocation,WTA)应用在群智能算法对初始种群的优化上,基于蚁群算法...针对认知无线Mesh网络传统的多约束QoS组播路由算法一贯的进行随机初始化种群这一问题,在没有增加智能算法的复杂度的同时,首次将武器-目标分配问题(weapon to target allocation,WTA)应用在群智能算法对初始种群的优化上,基于蚁群算法,将集火射击、分火射击和混合射击的思想加入到对初始种群的设计上,提出一种基于WTA的QoS组播路由优化算法。其目标是满足无线组播业务的QoS约束且不增加算法复杂度的同时,结合蚁群的强鲁棒性和并行性等性能优势。经过实验验证,在网络开销和时延等方面的指标具有很好改善。展开更多
The next-generation optical network is a service oriented network,which could be delivered by utilizing the generalized multiprotocol label switching(GMPLS) based control plane to realize lots of intelligent features ...The next-generation optical network is a service oriented network,which could be delivered by utilizing the generalized multiprotocol label switching(GMPLS) based control plane to realize lots of intelligent features such as rapid provisioning,automated protection and restoration(P&R),efficient resource allocation,and support for different quality of service(QoS) requirements.In this paper,we propose a novel stateful PCE-cloud(SPC)based architecture of GMPLS optical networks for cloud services.The cloud computing technologies(e.g.virtualization and parallel computing) are applied to the construction of SPC for improving the reliability and maximizing resource utilization.The functions of SPC and GMPLS based control plane are expanded according to the features of cloud services for different QoS requirements.The architecture and detailed description of the components of SPC are provided.Different potential cooperation relationships between public stateful PCE cloud(PSPC) and region stateful PCE cloud(RSPC) are investigated.Moreover,we present the policy-enabled and constraint-based routing scheme base on the cooperation of PSPC and RSPC.Simulation results for verifying the performance of routing and control plane reliability are analyzed.展开更多
基金Supported by the National Basic Research Program of China(No.2012CB315803)the Around Five Top Priorities of One-Three-Five Strategic Planning,CNIC(No.CNIC PY 1401)Chinese Academy of Sciences,and the Knowledge Innovation Program of the Chinese Academy of Sciences(No.CNIC_QN_1508)
文摘Software defined networking( SDN) offers programmable interface to effectively control their networks by decoupling control and data plane. The network operators utilize a centralized controller to deploy advanced network management strategies. An architecture for application-aware routing which can support dynamic quality of service( Qo S) in SDN networks is proposed. The applicationaware routing as a multi-constrained optimal path( MCOP) problem is proposed,where applications are treated as Qo S flow and best-effort flows. With the SDN controller applications,it is able to dynamically lead routing decisions based on application characteristics and requirements,leading to a better overall user experience and higher utilization of network resources. The simulation results show that the improvement of application-aware routing framework on discovering appropriate routes,which can provide Qo S guarantees for a specific application in SDN networks.
文摘针对认知无线Mesh网络传统的多约束QoS组播路由算法一贯的进行随机初始化种群这一问题,在没有增加智能算法的复杂度的同时,首次将武器-目标分配问题(weapon to target allocation,WTA)应用在群智能算法对初始种群的优化上,基于蚁群算法,将集火射击、分火射击和混合射击的思想加入到对初始种群的设计上,提出一种基于WTA的QoS组播路由优化算法。其目标是满足无线组播业务的QoS约束且不增加算法复杂度的同时,结合蚁群的强鲁棒性和并行性等性能优势。经过实验验证,在网络开销和时延等方面的指标具有很好改善。
基金supported by National Natural Science Foundation of China(No.61571061)Innovative Research Fund of Beijing University of Posts and Telecommunications (2015RC16)
文摘The next-generation optical network is a service oriented network,which could be delivered by utilizing the generalized multiprotocol label switching(GMPLS) based control plane to realize lots of intelligent features such as rapid provisioning,automated protection and restoration(P&R),efficient resource allocation,and support for different quality of service(QoS) requirements.In this paper,we propose a novel stateful PCE-cloud(SPC)based architecture of GMPLS optical networks for cloud services.The cloud computing technologies(e.g.virtualization and parallel computing) are applied to the construction of SPC for improving the reliability and maximizing resource utilization.The functions of SPC and GMPLS based control plane are expanded according to the features of cloud services for different QoS requirements.The architecture and detailed description of the components of SPC are provided.Different potential cooperation relationships between public stateful PCE cloud(PSPC) and region stateful PCE cloud(RSPC) are investigated.Moreover,we present the policy-enabled and constraint-based routing scheme base on the cooperation of PSPC and RSPC.Simulation results for verifying the performance of routing and control plane reliability are analyzed.
