共查询到19条相似文献,搜索用时 52 毫秒
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钟机灵 《信息技术与信息化》2021,(7):197-200
针对传统校园网哑终端设备管理混乱、子网边界模糊、信息点分散、网络运维难度大等问题,提出运用SDN(software defined network,软件定义网络)技术构建新一代校园网的方法,研究分析了 SDN关键技术包括Openflow协议、NETCONF协议、SDN控制器和数据转发等工作原理和过程,并结合校园网实际情... 相似文献
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为规范工业互联网平台内部及平台间信息交换、数据指令上传下达等异构协议兼容适配场景,解决各类生产设备、信息系统之间接口不统一等问题,中国电子技术标准化研究院牵头编制了《工业互联网平台异构协议兼容适配要求》国家标准。通过对标准要点进行解读,详细阐述工业互联网平台异构协议兼容适配框架和相关要求,介绍了工业互联网平台异构协议接入关键技术要求,并对该标准的推广应用进行分析,为工业互联网平台开展协议适配的技术、方法改进提供相关依据。 相似文献
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在SDN当中,控制器是重要的核心,对于底层转发设备,能够更好的进行控制和管理,将网络资源调用提供给上层应用。在SDN系统的运行当中,重要的基础和前提就是可扩展性、高效性、可靠性。在运营商网络当中,具有协议复杂、相对封闭、信息海量、规模庞大等特点,同时对网络的稳定性、可靠性等,都有着很高的要求。但是,传统的SDN控制器在实际应用中,难以很好的满足运营商网络的可靠性、高效性等要求,因此,需要对基于OpenFlow的SDN控制器关键技术进行研究。 相似文献
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冯新波 《卫星电视与宽带多媒体》2020,(1):9-11
随着通信技术的不断发展,SDN体系结构给互联网领域带来了的新变革。本文对SDN体系结构的特性和关键技术进行研究,由于其集中管理与接口开放,导致SDN体系结构的安全问题成为关注的焦点。鉴于此,本文基于SDN体系结构的特性,探讨SDN体系结构的关键技术以及安全防护问题,试图为之提供行之有效的可行性建议。 相似文献
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为弥补现有研究在软件定义网络(Software-Defined Networking,SDN)控制平面未知漏洞防御方面的空白,本文提出了一种基于多维异构特征与反馈感知调度的内生安全控制平面的设计方案.该方案以"冗余、异构和动态"为切入点,通过组合执行体冗余集构建策略、多维异构元素着色策略和动态反馈感知调度策略,有效增加SDN控制平面对攻击者所呈现的执行体时空不确定性(逆转攻防不对称性).相关仿真结果表明该方案可以收敛全局执行体数目、增加执行体之间的多维异构度并降低系统全局失效率. 相似文献
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为弥补现有研究在软件定义网络(Software-Defined Networking,SDN)控制平面未知漏洞防御方面的空白,本文提出了一种基于多维异构特征与反馈感知调度的内生安全控制平面的设计方案.该方案以冗余、异构和动态为切入点,通过组合执行体冗余集构建策略、多维异构元素着色策略和动态反馈感知调度策略,有效增加SDN控制平面对攻击者所呈现的执行体时空不确定性(逆转攻防不对称性).相关仿真结果表明该方案可以收敛全局执行体数目、增加执行体之间的多维异构度并降低系统全局失效率. 相似文献
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作为未来网络领域的关键技术,SDN/NFV在工业互联网、5G切片、云化电信网络等应用场景先后成熟。2019年,SDN/NFV技术正式进入v2.0发展阶段。梳理了SDN/NFV技术的演进历程,归纳了其v2.0阶段的整体架构和关键技术,给出了我国产业界发展的建议。 相似文献
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Gabriele Castellano Ivano Cerrato Molka Gharbaoui Silvia Fichera Barbara Martini Fulvio Risso Piero Castoldi 《International Journal of Communication Systems》2019,32(17)
Modern controllers for software‐defined networks (SDN) enable the execution of arbitrary SDN applications (eg, Network Address Translation (NAT), traffic monitors) that may be exploited by an overarching set of services (eg, application‐layer orchestrators) to build even richer services. To this purpose, the above overarching services require a mechanism that allows reading the run‐time state and writing the configuration of arbitrary SDN applications, possibly through a uniform API. Unfortunately, most SDN applications are not designed/implemented by taking into account the possibility to be used as part of higher level service workflows (eg, a complex intrusion prevention system that leverages multiple elementary services as individual components), hence they may not provide an adequate interface that would allow overarching services to exploit their features. This paper addresses this problem by proposing an approach to represent the run‐time state of arbitrary applications, where data are exported according to high‐level model‐based structures. Furthermore, the mapping from the high‐level data model to the actual data representation within the SDN application is enabled by a suite of algorithms that are generic enough to operate independently of the actual source code of the application, thus avoiding undesired and invasive modifications to existing applications. The paper also presents a software framework and a prototype implementing the proposed approach, characterizes the resulting performance, and discusses pros and cons of the proposed approach. 相似文献
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The next generation wireless networks will be the coexistence of heterogeneous wireless technologies. Balancing the traffic load among different networks can effectively utilize the overall radio resources in the system. In this paper, we propose an efficient load balancing scheme for the heterogeneous overlay systems, which is applied in the call admission control process. If the available network(s) cannot provide enough resource for the request call without degrading the quality‐of‐service (QoS) obtained by the ongoing calls, the system will perform load balancing operations first by initiating vertical handoffs among networks in order to create more rooms for the request call. The load balancing algorithm is to minimize the variance between the network utilizations of the entire system, which can be formulated as a quadratic binary programming problem. Simulation results show that the proposed scheme can admit more calls into the system compared with the other three reference schemes and then improve the overall throughput. Meanwhile, the scheme can keep the networks working in effective states and provide a better QoS support for users. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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Abd‐Elhamid M. Taha Hossam S. Hassanein Hussein T. Mouftah 《Wireless Communications and Mobile Computing》2014,14(12):1176-1188
Common Radio Resource Management techniques have shown great promise in both enhancing network operation and user satisfication. Such gains are achieved through the joint management of the individual access technologies in a Heterogeneous Wireless Network. The objective of this work is to expand on the existing body of work to accommodate heterogeneity not just at the traditional access‐network level but to other connectivity modes such as dynamic spectrum access. Such modes affect operator profitability in both the long and short terms. Specifically, we explore the design of a cost‐management model that adapts to the short‐term variability in connectivity costs. We also display the operational aspects and effectiveness of this functionality through both simulation and an analytical model. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献