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电力骨干通信网业务需求分析及业务流量测算是进行通信网规划和优化的重要工作.按照智能电网电力骨干通信网承载业务的情况,按专线业务及IP业务分别提出了电力骨干通信网基础业务模型及业务流量测算方法,形成了电网典型业务节点业务流量测算模型和方法.基于“十三五”电力骨干通信网业务需求,对典型电网生产业务及典型管理信息化业务流量模型进行了研究,形成了每类业务的流向和流量计算模型.形成的各类业务流量测算模型已经应用于国家电网公司“十三五”通信规划中,为电力系统各级骨干通信网规划提供了科学指导与参考. 相似文献
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为了更深入地了解区分服务对网络QoS性能的影响,采用了能够真实反映网络流量特性的自相似业务模型进行分析,选取的模型是重尾ON-OFF叠加模型PowON-PowOFF;研究了自相似业务流在WFQ方案中对QoS参数的影响,并分析了该模型各参数对QoS性能的影响,为下一代网络采取相应机制克服突发业务的不利影响提供了依据。 相似文献
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自相似业务模型—通信网络突发业务建模的新方法 总被引:26,自引:3,他引:23
在研究通信网络的流量控制及网络性能时,业务源模型是一个十分重要的组成部分。传统的业务模型大多基于Poisson模型或其改进形式,假定业务突发长度呈负指数分布。近年来对大量的WAN、LAN、及VBR业务、ISDN中传输的业务等多种业务的测量表明:在这些业务中普遍存在着自相似性(或称为长相关性)。该性质显著影响宽带网的流量控制及排队分析,因而已经受到越来越多的关注。本文综述了近几年在自相似业务模型研究方面所取得的主要成果,包括自相似业务的数学描述、建模方法、排队分析等。 相似文献
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能源互联网的一个本质特征是通过先进的通信网络实现能源供给与消费间的双向互动。以光纤通信为基础的高可靠通信网络优化配置以满足多业务的服务质量(QoS)需求成为亟需解决的关键问题。从电力光纤传输网络的可靠性入手,并考虑电力通信业务的多QoS传输需求,设计一种基于复合量度的电路配置优化方法。有别于传统最短路配置算法,新方法在一次配置过程中同时规划m条可行配置方案,并且通过分析路径集的带宽、时延、丢包率、衰耗和成本等不同量度和光路全程可靠性,最终获得满足可靠性和传输QoS需求的光路配置方案,并给出优先选择序列。多电路优化配置将有效提升电力通信的可靠性,也可为未来多路流量分摊提供电路配置保证。通过某城区35~500 kV电力通信站网实例仿真计算,新配置方法能够一次获取4条同时满足业务多QoS需求的传输电路,实现主备电路保护。对电力光纤传输网络的规划和运行优化,提高电力通信网的资源调配能力和可靠性提供参考。 相似文献
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战术异构网络互联端到端QoS研究 总被引:1,自引:0,他引:1
战术异构通信网络的融合,需要更完善的端到端服务质量(Quality of Service,QoS)体系。在研究和分析战术异构通信网特点后,分析总结出战术异构通信网络端到端QoS研究内容,并参考下一代网络QoS框架结构,提出了基于策略的QoS架构模型。最后阐述了所涉及的关键技术,用于解决在战术异构通信网中不同业务在跨网络传输时端到端QoS保证,合理利用无线网络资源,有效提高数据传输性能等问题。 相似文献
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随着坚强智能电网建设和发展,传统SDH/MSTP通信传输网平台已不能够满足SG-ERP、省-市-县视频会商、输变电设备状态在线监测、应急通信、智能配网等对信息通信业务的IP化和高带宽需求,为此,需寻求一种新通信组网技术,既能满足IP业务承载、IP业务带宽突发性、高带宽等要求,又能实现网络级的OAM、QoS等。根据山东省地市数据承载网设计规划,提出基于PTN MPLS-TP的电力通信传输网第二平面的设计方案,供电力行业从业者参考。 相似文献
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The main objective in telecommunications network engineering is to have as many happy users as possible. In other words, the network engineer has to resolve the trade-off between capacity and QoS requirements. Accurate modeling of the offered traffic load is the first step in optimizing resource allocation algorithms such that provision of services complies with the QoS constraints while maintaining maximum capacity. As broadband multimedia services became popular, they necessitated new traffic models with self-similar characteristics. We present a survey of the self-similarity phenomenon observed in multimedia traffic and its implications on network performance. Our current research aims to fill the gap between this new traffic model and network engineering. An immediate consequence of this study is the demonstration of the limitations or validity of conventional resource allocation methods in the presence of self-similar traffic 相似文献
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Anju Lata Yadav Prakash Vyavahare Prashant Bansod 《International Journal of Electronics》2020,107(4):561-575
ABSTRACTWorldwide Interoperability for Microwave Access (WiMAX), based on IEEE 802.16, provides first-mile wireless access for broadband users and is capable of satisfying the Quality of Service (QoS) requirements of voice, video and data traffic (triple-play services). This paper proposes two WiMAX hybrid schedulers, developed by integration of homogeneous schedulers, for providing QoS to triple-play services. The Markovian model is solved analytically to derive various performance metrics, which are then compared with an existing scheduler. The splitting of FTP traffic, before scheduling, provides improved throughput as compared to the proposed first hybrid scheduler, making this an exclusive component of the proposed second hybrid scheduler. The results show that the second proposed model provides an improvement of mandatory QoS parameters; reduction in voice traffic mean queuing delay by 68.18%, and improvement in FTP traffic throughput by 67.27% as compared to the first designed model. The first considered scheduler gives high inter-class fairness; however, it does not provide satisfactory QoS performance. The proposed hybrid schedulers are better in overall performance than other schedulers proposed recently, as they not only satisfy the QoS demands of different types of services but also improve the fairness among services. 相似文献
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In this paper, we model multi‐dimensional QoS in a unified framework, and study some fundamental constraints from the network and the traffic on realizing multiple QoS goals. Multi‐dimensional QoS requirements are quantitatively represented using a QoS region. Based on the theory of effective bandwidths, the framework connects the throughput, the delay, and the loss rate in a uniform formula. Important traffic and network factors, namely, the burst size and the link speed, are involved. With this framework, it is found that the burst size sets hard limit on the QoS region that can be achieved, and that the matching between the link speed and the node processing power can greatly improve the limit. It is also made clear that while pure load imbalance among links does not affect the QoS region, the heterogeneities of burst size or link speed may severely degrade the QoS performance. Applying the theory to real‐time services in differentiated services architecture, we show it provides a useful tool for QoS prediction and network dimensioning. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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电力应急通信系统为各类突发事件和自然灾害现场实时直播提供重要通道保障。在重点研究5G切片等关键技术及特点的基础上,通过结合电力应急通信业务需求,对5G技术在电力应急通信中的应用展开研究,提出一种基于5G技术的电力应急通信网络架构解决方案,并从架构特点、业务流向、安全等方面阐述了应用架构的优势,该解决方案提升了应急现场在直播多个高清画面时的可靠传输能力,满足复杂多变的应用环境。 相似文献
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随着科技进步,我国在应急通信系统建设上也正高速发展,当前应急通信网络对多媒体业务有着迫切需求,对网络带宽要求更高。而当网络存在多种不同业务时,传统通用的路由协议不再适用,它们大多以最小跳数为路由度量或者是某个单一度量,未能考虑不同业务的服务质量(Quality of Service, QoS)需求,因而无法同时兼顾不同业务流的传输要求。提出了一种应急通信中业务感知的宽带自组网路由策略,对不同类型业务在路由和转发优先级上进行区分。经多次仿真验证,该策略能使网络在满足应急语音业务QoS需求的同时,也能兼顾承载的视频、数据等其他业务的性能。 相似文献
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现有通信技术由于种种缺陷不能完全满足智能风电场场内视频、数据、语音等通信业务接入网络建设的需求,而无源光纤以太网无源光以太网(EPON,Ethernet Passive Optical Network)系统以其高宽带且可动态分配、组网灵活、故障率低、易于安装维护和扩展等特点,十分适合风电场场内多种通信业务接入网络的建设。从组网结构、技术优势、网络系统设计等方面阐述了基于EPON的智能风电场通信解决方案,验证了EPON应用于风电场的可行性。 相似文献
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网络流量建模是网络规划与性能评价的重要基础,传统的业务模型大多基于泊松模型和马尔可夫排队模型,只具有短程相关性,随着网络业务的不断研究发现,实际网络业务流在很长的时间范围内都具有长程相关性,即一种自相似性。本文采用RMD算法和Fourier变换法对网络流量的自相似模型-FBM模型进行了建模及仿真研究,生成了所需的自相似流量序列。然后分别采用R/S法和方差时间图法对其进行自相似参数检测。结果验证了仿真算法所产生的序列存在着自相似性,并同时对RMD算法和Fourier变换法的优缺点进行了分析。 相似文献