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Decoupled Delay and Bandwidth Centralized Queue-Based QoS Scheme in openflow Networks

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China Communications 2019年第7期16卷 70-82页

作者： Weihong Wu Jiang Liu Tao Huang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China Beijing Laboratory of Advanced Information Networks Beijing 100876 China Beijing Advanced Innovation Center for Future Internet Technology Beijing 100124 China

There are an increasing of scenarios that require the independent bandwidth and delay demands. For instance, in a data center, the interactive message would not occupy much bandwidth, but it requires the rigorous demands for the delay. However, the existing QoS approaches are mainly bandwidth based, which are inappropriate for these scenarios. Hence, we propose the decoupled scheme in the openflow networks to provide the centralized differential bandwidth and delay control. We leverage the mature HTB to manage the bandwidth. And we design the Queue Delay Management Scheme (QDMS) for queuing delay arrangement, as well as the Comprehensive Parameters based Dijkstra Route algorithm (CPDR) for the propagation delay control. The evaluation results verify the decoupling effectiveness. And the decoupled scheme can reduce the delay for high priority flows.

关键词： software-defined networks openflow quality of service decoupled delay and rate

Minimum Cost Multi-Path Parallel Transmission with Delay Constraint by Extending openflow

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China Communications 2018年第3期15卷 15-26页

作者： Kuangyu Qin Chuanhe Huang N.Ganesan Kewei Liu Xi Chen Computer School of Wuhan University Wuhan 430072 China Collaborative Innovation Center of Geospatial Technology Wuhan 430072 China School of Computer Science and Information Security Guilin University of Electronic Technology Guilin 541004 China Regional Institute of Co-operative Management Banashankari 2nd Stage Bangalore 560070 India

Sometimes user has the requirement to run a high bandwidth application over a low bandwidth network. But its implementation is not easy as the traditional network transmits data with only one path where its bandwidth is lower than the demand. Although the current network technology like SDN has the ability to precisely control the data transmission in the network, but till now the standard openflow protocol does not support splitting one flow to multiple flows. In this paper, a flow splitting algorithm is proposed. The algorithm splits a data flow to multiple sub-flows by extending the openflow protocol. A multiple paths routing algorithm is also proposed to implement the multi-path parallel transmission in the paper. The algorithm selects multiple paths and minimizes the cost of transmission under the constraint of maximum delay and delay variance. The simulations show the algorithms can significantly improve the transmission performance.

关键词： SDN openflow multi-pathtransmission

Energy Efficient Ambience Awake Routing with openflow Approach

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Computers, Materials & Continua 2021年第5期67卷 2049-2059页

作者： Hima Bindu Valiveti SNV Ganesh Budati Anil Kumar Dileep Kumar Yadav Department of ECE GRIETHyderabad500090India Department of EEE Avanthi Institute of Engineering and TechnologyVisakhapatnam535006India Department of CSE Galgotia’s UniversityNoida201310India

A major problem in networking has always been energy *** life is one parameter which could help improve Energy *** research on wireless networking stresses on reducing signaling messages or time required for data transfer for addressing energy consumption *** or Forwarding packets in a network between the network elements like routers,switches,wireless access points,etc.,is complex in conventional *** the advent of Software Defined Networking(SDN)for 5G network architectures,the distributed networking has embarked onto centralized networking,wherein the SDN Controller is responsible for decision *** controller pushes its decision onto the network elements with the help of a control plane protocol termed *** networks have been largely in use because of their ease in physical and logically setting the administrative *** centralized controller deals with the policy funding and the protocols used for routing procedures are designated by the decentralized *** Awake is a location centered routing protocol deployed in the 5G network architecture with openflow *** Ambience Awake mechanism relies on the power consumption of the network elements during the packet transmission for unicast and multicast *** signalling load and the routing overhead witnessed an improvement of 30%during the routing *** proposed routing mechanism run on the top of the decentralized SDN controller proves to be 19.59%more efficient than the existing routing solutions.

关键词： Energy efficiency routing smart networks 5G software defined networking openflow

An openflow-Based Load Balancing Strategy in SDN

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Computers, Materials & Continua 2020年第1期62卷 385-398页

作者： Xiaojun Shi Yangyang Li Haiyong Xie Tengfei Yang Linchao Zhang Panyu Liu Heng Zhang Zhiyao Liang Department of Science and Technology China Electronics Technology Group CorporationBeijingChina National Engineering Laboratory for Public Safety Risk Perception and Control by Big Data China Academy of Electronics and Information TechnologyBeijingChina University of Science and Technology of China HefeiChina National University of Defense Technology ChangshanChina Macao University of Science and Technology Avenida WaiLongTaipaMacao

In today’s datacenter network,the quantity growth and complexity increment of traffic is unprecedented,which brings not only the booming of network development,but also the problem of network performance degradation,such as more chance of network congestion and serious load *** to the dynamically changing traffic patterns,the state-of the-art approaches that do this all require forklift changes to data center networking *** root of problem is lack of distinct strategies for elephant and mice *** this condition,it is essential to enforce accurate elephant flow detection and come up with a novel load balancing solution to alleviate the network congestion and achieve high bandwidth *** paper proposed an openflow-based load balancing strategy for datacenter networks that accurately detect elephant flows and enforce distinct routing schemes with different flow types so as to achieve high usage of network *** prototype implemented in Mininet testbed with POX controller and verify the feasibility of our load-balancing strategy when dealing with flow confliction and network *** results show the proposed strategy can adequately generate flow rules and significantly enhance the performance of the bandwidth usage compared against other solutions from the literature in terms of load balancing.

关键词： Load balancing openflow data center network elephant flow multi-path routing

openflow交换机流表溢出问题的缓解机制

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计算机学报 2018年第9期41卷 2003-2015页

作者：乔思祎胡成臣李昊管晓宏邹建华西安交通大学智能网络与网络安全教育部重点实验室西安710049 通信网络信息传输与分发技术重点实验室石家庄050081

在新兴的软件定义网络(Software Defined Networking,SDN)、openflow交换机中,为满足openflow协议宽匹配域的需求,SDN交换设备需要更大的查找表存储容量.当流表溢出时,将导致控制报文数目爆炸性增长、数据包传输时延增大等危害网络正常... 详细信息

在新兴的软件定义网络(Software Defined Networking,SDN)、openflow交换机中,为满足openflow协议宽匹配域的需求,SDN交换设备需要更大的查找表存储容量.当流表溢出时,将导致控制报文数目爆炸性增长、数据包传输时延增大等危害网络正常运行的后果.然而考虑成本因素,高速查找表容量不可能无限增加.即使单纯地增加流表容量,并不能使溢出的概率降低为零,且极不经济.本文分析了网络流量的特征,提出了一种流表共享方法(Flow Table Sharing,FTS),针对流表溢出现象带来的危害,完善了Table-Miss处理机制,有效遏制了由于流表溢出而引发的危害网络正常运行的情况.相比目前的Table-Miss处理方式,FTS对流表溢出情况下控制消息数量和RTT时间的优化都达到两个数量级.此外,该文针对流表扩散方法设计了简单高效的基于openflow组表的随机路由选择算法,系统结构实施简单,可以方便地降级为现行的通用Table-Miss处理模式.

关键词： openflow 流表溢出 Table-Miss 组表

openflow交换机动态共享限速机制的研究

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计算机学报 2016年第6期39卷 1224-1236页

作者：杨骥许琛龚志敏胡成臣管晓宏西安交通大学智能网络与网络安全教育部重点实验室西安710049

每流限速一直以来都是互联网服务质量保障(QoS)的一大挑战,由于受到硬件资源的限制,很难找到一种快速高效的算法在数据包级对流量进行区分限速.openflow1.3协议对每流限速(Meter)部分,给出了具体定义和描述,该文参照该协议标准,提出了... 详细信息

每流限速一直以来都是互联网服务质量保障(QoS)的一大挑战,由于受到硬件资源的限制,很难找到一种快速高效的算法在数据包级对流量进行区分限速.openflow1.3协议对每流限速(Meter)部分,给出了具体定义和描述,该文参照该协议标准,提出了具体的Meter实现方案,并在ONetSwitch硬件平台上,进行了实验验证和性能测试.本文通过对网络流量的统计分析,发现网络中共存的流数量往往只占总流量的万分之一,因此使多条流分时共享硬件资源,可以有效解决每流限速的难题.参考动态队列共享(DQS)的思想,该文提出动态共享限速(DMS)算法,在多条流之间进行调度,实现多条流分时共享限速通道,在硬件资源受限,限速通道数量一定,同时需要限速的流数量大于限速通道数量时,能够有效地实现对各条流进行限速的功能.实验结果表明,Meter能够为每条流有效分配限速通道,从而在网络中对多条流以不同的速率区分限速.

关键词： openflow 1.3 ONetSwitch QoS 每流限速动态共享限速软件定义网络下一代互联网

openflow中基于精确时间戳的延迟测量方法

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通信学报 2017年第11期38卷 178-187页

作者：邱欣逸李俊周建二李菁菁中国科学院计算机网络信息中心北京100190 中国科学院大学北京100049

目前的openflow延迟测量方法占用较多的网络资源,且测量精度较差。根据SDN集中控制的特性,在openflow网络中设计一种基于准确时间戳的延迟测量方法。使用控制器动态计算出任意2个交换机之间的多条可达路径,只需发送一个探测分组就可以... 详细信息

目前的openflow延迟测量方法占用较多的网络资源,且测量精度较差。根据SDN集中控制的特性,在openflow网络中设计一种基于准确时间戳的延迟测量方法。使用控制器动态计算出任意2个交换机之间的多条可达路径,只需发送一个探测分组就可以测量出多条路径上的延迟,减少了网络资源的消耗。同时,为了提高准确性,将时间戳的获取从控制器转移到openflow交换机中。仿真实验证明,与其他测量方法相比,该方法的测量精度与稳定性都有较大提升。

关键词： openflow 软件定义网络延迟测量时间戳

openflow网络测量分析系统的设计实现

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通信学报 2015年第3期36卷 269-276页

作者：翁溪陈鸣张国敏许博邢长友解放军理工大学指挥信息系统学院江苏南京210007

openflow网络目前缺少支持定量测量分析各种创新应用或机制的有效手段。以升级openflow网络设备为具有本地日志功能的openflow测量实体为基础,设计了一种基于集中式服务器控制测量实体进行分布式测量的机制,制定了其间的通信规程OpenFlo... 详细信息

openflow网络目前缺少支持定量测量分析各种创新应用或机制的有效手段。以升级openflow网络设备为具有本地日志功能的openflow测量实体为基础,设计了一种基于集中式服务器控制测量实体进行分布式测量的机制,制定了其间的通信规程openflow测量控制协议(OMCP),同时基于正则表达式、散列技术和可扩展的统计函数库等方式设计了一种分析测量日志的功能。原型系统的实验表明,OpenTrace服务器能够灵活部署和控制分布式测量任务,OpenTrace系统不仅能够定量地重现数据平面的数据流传输过程而且能够重现控制平面的控制事件交互过程,从而可为量化分析openflow网络应用和新型机制提供广泛的性能数据。

关键词：未来互联网 openflow 分布式测量集中式控制

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openflow下的动态虚拟蜜网系统

北京邮电大学学报 2015年第6期38卷 104-108,119页

作者：胡毅勋郑康锋武斌杨义先北京邮电大学信息安全中心北京100876

提出了一种openflow下的动态虚拟蜜网系统,利用openflow交换机及其控制器的软件定义网络的新型网络架构,解决现有蜜网系统中流量控制困难的问题,替代现有基于重定向网关的半软件半硬件的转发方案.设计了一种虚拟蜜罐系统,可以虚拟运行... 详细信息

提出了一种openflow下的动态虚拟蜜网系统,利用openflow交换机及其控制器的软件定义网络的新型网络架构,解决现有蜜网系统中流量控制困难的问题,替代现有基于重定向网关的半软件半硬件的转发方案.设计了一种虚拟蜜罐系统,可以虚拟运行任意服务的任意主机,能够动态调整蜜罐结构.提出了叠加虚拟蜜网的概念,在一个蜜网物理实体中叠加运行多个不同的虚拟蜜网系统.部署设计的蜜网系统验证了密网系统转发时延低、动态性强的特性和叠加虚拟蜜网系统的有效性.

关键词： openflow 软件定义网络蜜网叠加虚拟蜜网