共查询到18条相似文献,搜索用时 125 毫秒
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ITU-TSG年月会议中国专家组 《电信网技术》2001,(1):57-62
一、会议概况 ITU-T SG13于2000年11月20~25日在日内瓦召开了1997~2000年研究期至新研究期的过渡性会议。 根据WTSA-2000会议的决议,ITU-TSG13被命名为多协议和IP网络及其互通研究组,负责网络体系架构和长期网络演进的研究,主要包括IP网络框架,传统电信网络综合基于IP的网络向用户提供综合业务的研究。SG13将主导IP网络体系架构、网络能力、传送能 相似文献
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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。 相似文献
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介绍了目前在IP网络上实现QoS的主要架构,并着重阐述了DiffServ这种主流架构的原理,以及以Alcatel 7750 SR业务路由器为代表的新一代面向业务设计的网络设备对于QoS的支持能力。: 相似文献
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IP技术作为互联网的技术基础,在今后5~10年如何发展是通信行业面临的关键问题。分析了传统IP网络架构的成功与不足,提出未来IP网络既要继承传统IP技术的设计原则,比如端到端原则和分层解耦原则,又要解决现有IP网络中业务和网络过于割裂的问题。从网络演进和未来业务需求的角度出发,认为未来IP网络的核心问题是要加强业务和网络的协同,提出了改进后的IP网络设计原则“横向:服务化网络赋能的端到端架构,纵向:智能控制面支撑的分层模型”,并且基于此原则提出了未来网络的参考架构。 相似文献
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Ul Hassan Mahmood Chaudhry Shehzad Ashraf Irshad Azeem 《Wireless Personal Communications》2020,110(4):2087-2107
Wireless Personal Communications - The IP multimedia subsystem represents an architectural framework to support multimedia-based services using internet protocol over wired and wireless media.... 相似文献
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针对无线数据链网络,提出了一种新型的基于分层结构的IP路由算法模型,满足至少3种异构数据链网络的集成要求.仿真结果表明,该模型可有效支撑基于链路带宽、传输时延、链路质量等多种QoS的路由算法设计,为无线数据链网络层IP路由协议和算法设计提供了理论框架和实现指导. 相似文献
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Gravey P. Gosselin S. Guillemont C. Chiaroni D. Le Sauze N. Jourdan A. Dotaro E. Barth D. Bertome P. Laforest C. Vial S. Atmaca T. Hebuterne G. El Biaze H. Laalaoua R. Gangloff E. Kotuliak I. 《Lightwave Technology, Journal of》2001,19(1):23-31
With the tremendous introduction of internet protocol (IP) applications, the quality-of-service (QoS) becomes more and more an emergent issue. Concrete solutions can be adopted (IP/ATM/SONET/WDM) opening the way to new types of applications (interactive applications through the exploitation of voice and video) in a short-term approach. However, all the telecommunication community tries to provide new solutions offering capacity and flexibility in a simpler manner. In this paper, we present the concepts of a multiservice optical network studied in the framework of a French Research Program. The QoS could be offered through the combined exploitation of electronic memories in the edges and optical resources in the core of the optical network and through the coexistence of different types of connections. In particular, the traffic shaping in the edges is highlighted through simulation and demonstrates the real impact of this function to maintain the logical performance at its highest level. To propose concrete solutions for its implementation, two network scenarios are proposed. The first one, for the backbone, exhibits a novel optical packet switching architecture taking benefit of the massive presence of wavelengths to solve the contention. The second one, for the metro, shows a second optical packet switching architecture really adapted to the cost constraints (upgradability, compactness, granularity) 相似文献
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对于工业现场设备的监测控制,人们不再满足于集散控制系统和现场总线控制系统,为此,结合传感技术和Internet技术,将传感器制成网络产品,并实现网络通信TCP/IP协议。该文系统地介绍了IP传感器、TCP/IP协议及其实现原理,阐述了以太网通信模块的实现方案、软件设计,给出了网卡的复位及初始化事例。所研制的IP传感器具有远程数据访问、信息实时发布与共享以及在线编程等功能,为构建具有更高性能价格比的测控自动化系统成为可能,该模块在远程自动化领域具有广阔的应用前景。 相似文献
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分析了 IP (Internet Protocol)网络、电信网络及 IP电话的技术特点 ,着重研究了 IP业务的发展对传统电信网络、电信业务发展的影响。最后 ,结合江苏电信的现状 ,提出相应的发展策略。 相似文献
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This article studies multi-constraints least-cost multicast routing problem in internet protocol over dense wavelength division multiplexing (IP/DWDM) networks. To address this problem, an individual-difference-based quantum genetic algorithm (IDQGA) is proposed. This algorithm considers individual differences among chromosomes by introducing an adaptive rotation angle step determination scheme and a grouping-based quantum mutation operation. Simulations are conducted over network topologies. The results indicate that compared with other heuristic algorithms, IDQGA has better optimal performance on solving quality of service (QoS) multicast routing problem in IP/DWDM networks and is characterized by strong robustness, high success ratio and excellent capability on global searching. 相似文献
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A Mobile Ad hoc NETwork (MANET) is a group of mobile nodes that form a multihop wireless network. The topology of the network can change randomly due to unpredictable mobility of nodes and propagation characteristics. Previously, it was assumed that the nodes in the network were assigned IP addresses a priori. This may not be feasible as nodes can enter and leave the network dynamically. A dynamic IP address assignment protocol like DHCP requires centralized servers that may not be present in MANETs. Hence, we propose a distributed protocol for dynamic IP address assignment to nodes in MANETs. The proposed solution guarantees unique IP address assignment under a variety of network conditions including message losses, network partitioning and merging. Simulation results show that the protocol incurs low latency and communication overhead for an IP address assignment. 相似文献