智能控制在网络重构中的应用实现

网络重构已经成为各大运营商战略转型的重点,本文首先分析了网络重构的价值,对网络重构的关键技术进行介绍,提出面向网络重构的云化架构体系,对云化体系架构下智能模块SDN编排器和SDN控制器实现功能进行说明,进而提出网络重构环境下智能控制的应用实现场景。     

广东联通传送网SDN管理架构创新实践及业务应用

广东联通基于集团CPE-OTN自研控制平台能力,结合本省传送网络现状,首次提出以自主研发提升网络SDN能力为中心,推进网络架构扁平化、控制面智能化、业务编排定制化的SDN三层网络架构演进的总体目标,从管理架构创新、业务流程重构、产品开发联合交付模式3个维度重构广东联通传送网SDN网络管理架构体系,快速突破单厂家单域SD...     

基于SDN的卫星LTE融合网络及其性能仿真

软件定义网络技术SDN将网络控制功能与转发功能分离,使网络架构变得简明清晰。在简述传统卫星网络和地面LTE网络优势的基础上,概述卫星LTE星地融合网络,将SDN技术的核心思想引入卫星网络,提出基于SDN的卫星LTE融合网络架构,使用NS-3网络仿真软件实现对所提融合网络模型的仿真平台搭建,通过对不同场景下仿真数据的分析,评估所构建网络的性能,给出SDN卫星LTE融合网络的优势。     

一种基于SDN的开放SaaS平台网络安全体系设计

为解决开放软件即服务（SaaS）平台下的网络安全问题,将软件定义网络（SDN）与开放SaaS平台建设相结合,提出了一种基于SDN的开放SaaS平台网络安全体系设计思路。在对系统物理模型、功能模型与协同模型进行分析的基础上,设计了系统体系结构,分析了体系构成关键要素,给出了系统典型应用示例。基于SDN开展SaaS平台网络安全系统建设,对提高系统的安全性与开放性、构建满足用户个性化需求的网络安全体系具有重要意义。     

基于安全基片的可重构网络安全管控机制

对下一代互联网安全体系架构进行了分析探讨,重点研究了已有网络体系架构的特点及面临的安全挑战,界定了可重构网络体系的安全目标,并提出了基于安全基片的可重构网络安全管控机制。同时,给出了安全基片定义以及基于安全基片的可重构网络安全模型,并对多级安全等级的安全服务构造、基于安全基片动态构建安全服务等可重构网络安全管控的关键环节进行了深入阐述。     

基于元能力的SDN功能组合机制

软件定义网络（SDN, software-defined network）促进了控制逻辑的快速创新,使控制逻辑模块化和模块组合机制成为SDN的热点研究方向之一。为了在功能模块统一定义和规范划分的基础上实现网络功能组合,首先,从可重构网络引入“元能力”作为SDN控制功能模块划分的原子要素,提出一种基于元能力建模的统一资源描述方法;其次,针对网络功能灵活组合问题,提出了一种基于二级映射的元能力组合模型并给出其启发式算法;最后,为实现元能力组合,设计了作为SDN应用层扩展结构的元能力编排层,并给出基于NetFPGA-10G平台的原型实现。仿真实验与结果表明所提功能组合机制提高了组合效率及节点资源利用率。     

基于SDN/NFV的未来网络实验平台

依据SDN/NFV集中管控、动态、灵活、高效、可编排等特点,提出了基于SDN/NFV技术的未来网络实验平台的构建方案.该平台主要采用OpenStack和OpenDaylight的开源架构,同时研发设计SDN跨域虚拟网络通信、虚拟网元管理以及网络服务编排三大关键技术,实现了底层异构资源的实时动态管理与开放共享.同时,根据实验用户对网络资源的需求,灵活按需编排各种网络资源与SFC服务,为用户提供端到端的网络实验验证服务.     

基于SDN架构的数据中心网络路由算法需求分析

随着SDN技术的发展,采用基于SDN架构的数据中心网络将越来越广泛.围绕SDN技术在数据中心网络中的应用问题,分析了现代数据中心网络及SDN的技术特征,设计了SDN在现代数据中心网络中的应用架构,并以路由为视角分析总结了基于SDN的数据中心网络路由性能需求,提出了相应的解决方案,以期对我国未来数据中心网络建设路由设计提供必要的参考.     

基于SDN的IPRAN目标架构与组网模型探讨

在新型业务需求和新技术涌现的双重驱动下,软件定义网络(SDN)成为互联网应用提供商、运营商、IT系统和网络设备提供商共同关注的新型网络架构和技术。这种网络控制与转发能力分离的架构,可以支持更灵活的网络控制和业务能力提供。从SDN的概念和总体架构出发,分析IP RAN对SDN的需求,提出了在IP RAN中引入SDN技术的目标网络结构和网络模型,并对基于SDN的IP RAN应用策略进行了探讨。     

SDN/NFV助力宽带接入网成网络重构关键突破口

面对市场竞争和技术发展的新形势,运营商网络转型与重构已成为全球性趋势.以中国电信为例,2016年7月,中围电信便提出“CTNet2025”网络重构战略,计划用10年左右时间,基于SDN、NFV、云计算等新技术,构建简洁、敏捷、集约、开放的网络架构,并使网络重构成为企业战略转型的重要支柱. 编排器成SDN大规模部署关键 推进网络重构需要研究解决SDN、NFV方面的一系列关键技术问题.在SDN网络架构方面,基于ONF定义的架构,SDN编排器(SDN-O)对于大规模网络的部署是十分必要的.     

A novel energy‐aware routing mechanism for SDN‐enabled WSAN

Energy consumption is one of the most important design constraints when building a wireless sensor and actuator network since each device in the network has a limited battery capacity, and prolonging the lifetime of the network depends on saving energy. Overcoming this challenge requires a smart and reconfigurable network energy management strategy. The Software‐Defined Networking (SDN) paradigm aims at building a flexible and dynamic network structure, especially in wireless sensor networks. In this study, we propose an SDN‐enabled wireless sensor and actuator network architecture that has a new routing discovery mechanism. To build a flexible and energy‐efficient network structure, a new routing decision approach that uses a fuzzy‐based Dijkstra's algorithm is developed in the study. The proposed architecture can change the existing path during data transmission, which is the key property of our model and is achieved through the adoption of the SDN approach. All the components and algorithms of the proposed system are modeled and simulated using the Riverbed Modeler software for more realistic performance evaluation. The results indicate that the proposed SDN‐enabled structure with fuzzy‐based Dijkstra's algorithm outperforms the one using the regular Dijkstra's and the ZigBee‐based counterpart, in terms of the energy consumption ratio, and the proposed architecture can provide an effective cluster routing while prolonging the network lifetime.     

层次化跨区域SDN验证示范系统的设计与建设

软件定义网络（SDN）架构给网络带来了卓越的灵活性和可管理性。为了给新型SDN技术与应用提供大规模可行性验证试验床与试点部署平台,提出了依托于CERNET的层次化跨区域SDN 异地验证示范网络试验系统的总体架构,建设了9个城市、13个节点的SDN验证示范核心网与包含3个数据中心的接入网,并对基于SDN的vCPE智能专线业务、IPv4/IPv6过渡技术、流量监控调度应用和数据中心应用进行验证与示范。     

Efficient distributed traffic offloading algorithm based on SDN architecture

For addressing the problem of mobile data traffic offloading,network service cost minimization problem model was proposed,which considered the cost of base stations and the consumption of access points under the SDN architecture.Due to the defects of convergence speed and privacy security in the traffic offloading algorithm based on dual decomposition,the traffic offloading algorithm based on proximal Jacobian ADMM was proposed and an implementation scheme to ensure the privacy and security was designed.Meanwhile,the simulation results show that the algorithm based on the proximal Jacobian ADMM is superior to the dual decomposition algorithm in terms of convergence speed.     

Adaptive routing and wavelength assignment method based on SDN

Routing and wavelength assignment is an important resource allocation method of all-optical network.Aiming at the problem of traditional method combined with the new architecture,an adaptive multi-objective routing and wavelength assignment method based on SDN was proposed,which could realize the allocation of link resources of all-optical network through self-regulation.Based on the SDN service function chain model,service scheduling time and link service quality were taken as the scheduling objective,routing and wavelength assignment problem was constructed as the 0-1 integer programming problem,meanwhile,binary hybrid topology particle swarm optimization algorithm was used to optimize the network resources for optimal scheduling.The simulation results show that the proposed method is superior to the traditional classical algorithms in the test of recovery time,blocking rate and resource utilization.     

基于SDN/NFV的核心网演进关键技术研究

在NFV和SDN的基础上研究核心网架构的演进及应用领域;通过将NFV和SDN技术引入核心网,在核心网虚拟化,分组域网关控制转发分离及基于Service Chaining的即插即用的增值业务及复杂流处理平台进行研究,建议了基于SDN/NFV的核心网长期演进架构。     

SDN‐based wireless body area network routing algorithm for healthcare architecture

The use of wireless body area networks (WBANs) in healthcare applications has made it convenient to monitor both health personnel and patient status continuously in real time through wearable wireless sensor nodes. However, the heterogeneous and complex network structure of WBANs has some disadvantages in terms of control and management. The software‐defined network (SDN) approach is a promising technology that defines a new design and management approach for network communications. In order to create more flexible and dynamic network structures in WBANs, this study uses the SDN approach. For this, a WBAN architecture based on the SDN approach with a new energy‐aware routing algorithm for healthcare architecture is proposed. To develop a more flexible architecture, a controller that manages all HUBs is designed. The proposed architecture is modeled using the Riverbed Modeler software for performance analysis. The simulation results show that the SDN‐based structure meets the service quality requirements and shows superior performance in terms of energy consumption, throughput, successful transmission rate, and delay parameters according to the traditional routing approach.     

基于语义网的供需网知识协同研究

为满足应用程序基于知识的互操作,支持供需网协同工作,针对现有供需网协同缺乏语义支持的问题,提出了一个基于语义网的供需网知识协同框架和层次体系结构,设计了一个供需网本体转换模型,并对模型中本体实例生成算法的局部本体映射和多种相似度度量方法计算语义相似度、小波网络修正权值的全局本体映射进行了重点讨论.     

Orchestration mechanism for VNF hardware acceleration resources in SDN/NFV architecture

The hardware acceleration mechanism for VNF (virtual network function) is recently a hot research topic in SDN/NFV architecture because of the low processing performance of VNF.Once hardware acceleration resources have been plugged into the network,how to optimally mange and orchestrate these resources under service requirements remains a question to be solved.Firstly,a unified management architecture based on separated control for hardware acceleration resources was proposed.Then,traditional network topology together with hardware acceleration resources were modeled into a unified network model and then the hardware acceleration resource orchestration problem was transferred into a multi-objective linear programming problem.Finally,a hardware-accelerator-card-prior’ heuristic algorithm was designed.Experimental results show that compared with existing methods,the proposed orchestration mechanism can efficiently manage hardware acceleration resources and reduce the processing latency by 30%.     

云数据中心的SDN解决方案

SDN的设计理念是对网络资源进行池化管理,自动化实现网络资源的按需申请和调用,加速数据中心业务的上线周期。首先介绍了数据中心SDN的核心思想和SDN开放架构全景图,然后介绍了SDN网络模型和SDN业务部署方案,最后阐述了华为CloudFabric云数据中心网解决方案。