支持业务需求灵活定制的多态路由系统

传统僵化单一的路由机制已经无法适应未来多样化的业务需求和各种新型网络体系结构的试验与部署。针对此问题,本文基于路由功能与业务需求自适配的思想提出了多态路由模型,并设计实现了多态路由原型系统。该系统通过虚拟化技术以及灵活可编程的数据平面结构,实现了同构和异构网络中多种路由协议的共存,完成了基于路由服务描述的路由协议个性化定制和数据平面的多表选择查询与转发处理。最后,基于NetFPGA-10G平台设计实现了多态路由原型系统。相较于现有路由试验系统,多态路由系统在实现路由协议定制化及异构网络共存的同时,更好地保证了业务的服务质量,具有更高的转发速率以及可扩展性。     

一种面向智慧协同网络的自适配路由策略研究

现有互联网网络体系和机制相对"静态"和"僵化",缺乏支持智慧网络的有效机制.要从根本上解决现有互联网存在的严重弊端,必须创建新的网络理论体系.本文在智慧协同网络"三层"、"两域"体系结构下,针对"网络组件层"的路由自适配问题展开研究,提出基于生物启发的转发网络族群自适配路由策略,实现族群内路由组件之间的智慧协调、动态重构和优化决策,有效解决现有路由策略的静态、僵化等问题.通过数学分析证明:如果设定模型参数μ∈(0,1),提出的自适配路由策略可以始终保持稳定性.最后,通过原型系统验证了提出自适配路由策略是切实可行的,能够提高网络的承载业务数量和提升用户体验.     

一种基于马尔科夫决策过程的多态路由派生方法

基于路由结构的自组织和自调节思想来为多样化业务需求提供个性化定制路由服务,多态路由机制为满足目前业务和未来新业务的不同路由服务需求提供了一种有效解决途径.基于多态路由机制中派生过程的无记忆序贯决策特性,将其建模为马尔科夫决策过程,并提出一种基于增强型学习的多态派生方法.实验结果表明,该多态派生方法能够灵活有效地为多态路由机制构建满足需求的多样化路由服务.     

DSR的一种自适应路由自动缩短机制

动态源路由协议是无线自组织网络众多路由协议中被广泛关注的一种按需路由协议，目前，关于该协议的优化措施有很多。本文先分析了动态源路由协议的一种优化机制——路由自动缩短，该机制能动态缩短处于工作状态路由的跳数，但不保证缩短路由的质量，在此基础上，提出一种自适应路由自动缩短机制，新机制既可缩短路由．又能保证缩短路由质量．理论分析及仿真结果表明，自适应路由缩短机制的各项性能优于原路由缩短机制。     

面向AODV的有效路由选择的研究

按需矢量路由(AODV)是移动自组织网络(MANET)的典型路由,然而AODV路由总是选择最短路径进行通信,这会引起网内流量的不平衡,可能也会引起拥塞问题,最终影响服务质量(QoS)。为此,提出基于AODV的权值路由方案,记为AODV-W。AODV-W路由考虑了路径传输时延、链路稳定性和节点能量,并利用这些信息计算路径权值。再选择权值最低的路径作为数据传输通道。实验数据表明,提出的AODV-W路由提高了数据包传递率和吞吐量。     

面向可扩展的VANETs混合路由的研究与仿真

车载网VANETs(Vehicular ad hoc networks)属于高速移动的无线网络,可供车辆安全、交通监测以及其他的商业服务的应用。然而,为此,提出混合式的位VANETs中车辆的快速移动导致通信链路频繁地断裂,增加路由开销,降低了可扩展性。议地理位置路由的特点。HLAR(Hybrid location-based ad hoc routing)。HLAR结合了反应式路由、HLAR克服了反应式路由的扩展性问题,并改善了地理位置路由对位置误差的敏感性。同时,通过理论分析,量可扩展性,并推导了路由开销的表达式。通过分析、仿真表明,提出的路由协议具有很好的扩展性,并降低了路由开销。在仿真中引入位置误差因子,结果表明。同时,与同类的其他协议相比,输时延方面HLAR到对位置误差具有很强的鲁棒性HLAR在数据传输率、端到端传提升。     

基于缓存旁路和本地修复的多跳网络路由重建机制

该文针对多跳网络中现有AODV和AODV-BR按需路由算法的弊端,提出了基于缓存旁路和本地修复的AODV-CL路由重建机制。该机制利用空闲时间监听无线信道中传输的所有数据包和路由控制信令,用于维护有效的邻居节点列表及本地路由缓存,有效降低了周期性HELLO消息带来的信令负担,并增加了可用路由信息。中间节点在发现断链时,尝试采用局部修复,尽量避免由源节点广播RREQ消息发现路由。根据本地路由缓存及邻居节点的路由信息,实现了快速的路由发现及修复,能有效降低路由控制信令开销及丢包率。     

SD-QoS体系的路由机制研究

随着公用Internet的日益商业化,在QoS体系中提供一定的生存性保障已经变得十分必要。本文针对区分生存性的QoS体系中的不同生存性要求,在增加少量传输信息的基础上,提出了一种新的路由机制,保证满足生存性要求并通过备用资源的共享实现网络资源的有效利用。     

负载均衡自路由交换结构

为下一代网络提供服务质量保证的业务,提出了一种新颖的两级负载均衡多路径自路由交换结构.该结构的两级都使用一种多路径自路由结构.第一级通过简单的算法和少量缓存将输入端到达的数据流量均匀地派送到本级各输出端.第二级则通过自路由的方式将数据分组转发到其最终目的端口.数学分析和仿真证明,在理论研究常见的可容许(admissible)流量条件,该结构可以得到100%的吞吐率;在实际的统计可容许(statistical admissible)流量条件下,通过并行叠加机制可以得到100%的吞吐率.与其他结构相比,该结构无排队时延和抖动,硬件复杂性和传输时延也明显减小.     

无线自组织网络中的路由技术研究

路由技术是无线自组织网络组网的基础和关键环节.文章介绍了当前无线自组织网络路由技术研究的现状,在此基础上,详述了无线自组织网络中具有代表性的路由协议,并对这一领域未来的发展趋势作了展望.     

Location based routing addressing mechanism of integrated satellite and terrestrial network

The ever-changing characteristics of the connection between the satellite network and the terrestrial network caused by the high-speed movement of the satellites have always been one of the most important problem that plagues the routing mechanism of the satellite network and integrated network.To address this problem,a location addressing based routing mechanism of integrated satellite and terrestrial network (LA-ISTN) was proposed.LA-ISTN exploited the user’s physical location in the user’s IP address to calculate the routing orientation.Based on the orientation,LA-ISTN could choose the best forward interface.Theoretical analysis and simulation experiments show that compared with snapshot protocol and OSPF routing protocol,LA-ISTN significantly reduces the route table storage overhead,with no routing updates cost caused by neighbor packet switching and communication.Inter-satellite route selection is not dependent on the prediction of link connection relations,with strong robustness,can always guarantee the network’s availability.     

可重构信息通信基础网络体系研究简

提出了“可重构网络”思想并建立可重构信息通信基础网络体系,然后在可重构网络功能参考模型的基础上分别创立了网络元能力理论、多态寻址路由机制、网络重构机理和安全可管可控机理,从而为构建一个支持目前业务和未来新业务的不同服务质量需求,功能灵活扩展,满足泛在互联、融合异构、可信可管可扩需求,支持现有网络兼容演进和适于规模应用的新型网络通信信息基础设施提供了一种解决途径。     

动态路由模拟策略研究

网络模拟路由策略的基本目标是真实地反映模拟数据包的转发过程。拓扑变化会影响路由选择结果。现：有模拟器在处理动态路由时会让所有节点同时感知到拓扑变化信息，这与实际网络中的情况并不相符。给出并分析动态路由模拟抽象模型，进而提出计算不同节点对拓扑变化感知时间的策略；提出动态MTree_Nix路由策略，以静态路由表和拓扑变化消息序列作为动态路由表，通过比较节点的感知时间查找路由。实验结果表明，此算法能够更真实地模拟网络中的动态路由，并且具有较高的模拟效率。     

A resource-efficient and scalable wireless mesh routing protocol

By binding logic addresses to the network topology, routing can be carried out without going through route discovery. This eliminates the initial route discovery latency, saves storage space otherwise needed for routing table, and reduces the communication overhead and energy consumption. In this paper, an adaptive block addressing (ABA) scheme is first introduced for logic address assignment as well as network auto-configuration purpose. The scheme takes into account the actual network topology and thus is fully topology-adaptive. Then a distributed link state (DLS) scheme is further proposed and put on top of the block addressing scheme to improve the quality of routes, in terms of hop count or other routing cost metrics used, robustness, and load balancing. The network topology reflected in logic addresses is used as a guideline to tell towards which direction (rather than next hop) a packet should be relayed. The next hop is derived from each relaying node’s local link state table. The routing scheme, named as topology-guided DLS (TDLS) as a whole, scales well with regard to various performance metrics. The ability of TDLS to provide multiple paths also precludes the need for explicit route repair, which is the most complicated part in many wireless routing protocols. While this paper targets low rate wireless mesh personal area networks (LR-WMPANs), including wireless mesh sensor networks (WMSNs), the TDLS itself is a general scheme and can be applied to other non-mobile wireless mesh networks.     

一种可扩展的无线Mesh适配树路由协议

提出一种可扩展的无线Mesh适配树路由协议(SMTRP),解决无线Mesh随着网络规模扩大引起路由延迟增大,网络性能严重下降的问题.该协议引入Mesh适配树和自适应地址块机制,通过将网络拓扑反映在逻辑地址上,每个节点仅需维护自己的N跳邻居节点的信息,判断出数据包该往哪个方向转发,无需维护大量的路由表,节省了存储空间,减少了通信开销以及能量消耗.理论证明了SMTRP算法的可扩展性,并在OPNET仿真平台上验证了SMTRP协议的有效性.     

A token-based routing mechanism for GMPLS-controlled WDM networks

This paper analyzes destination initiated reservation for Generalized Multi-Protocol Label Switching (GMPLS) based wavelength division multiplexing (WDM) networks and determines, via simulation, probabilities of both forward blocking and backward blocking. During light traffic load, any degradation in performance is due to backward blocking, whereas during heavy traffic load forward blocking dominates. In order to minimize performance degradation due to blocking, this paper proposes a token based routing scheme that is capable of searching for the availability of more than one route from source to destination, meeting the desired quality of service (QoS). Extensive simulation results show that the proposed technique significantly improves the blocking performance and setup delay.     

稀疏分光网络中的组播路由机制研究

仅部分节点具有组播能力的光网络称为稀疏分光网络,基于网络性能和成本的考虑,网络常为稀疏分光配置.稀疏分光网络中组播路由主要解决如何为多点传送的组播业务请求寻找合适的光树或光森林的问题.在综合分类的基础上,文章重点对目前稀疏分光网络中的组播路由机制和相关算法进行分析和总结,并对未来工作进行了展望.     

Ant based probabilistic routing with pheromone and antipheromone mechanisms

Using the idea of probabilistic routing, calls in an ant based decentralized scheme are not routed according to the largest probabilities in the pheromone tables but randomly according to these probabilities. This principle can be particularly helpful in order to further minimize possible node congestion problems. An additional incorporation of the antipheromone mechanism in the operation of artificial ants helps in better biasing the network. This paper examines the behaviour of such a routing scheme using a proper set of suitable metrics. Copyright © 2004 John Wiley & Sons, Ltd.     

Research on trust sensing based secure routing mechanism for wireless sensor network

Aiming at the serious impact of the typical network attacks caused by the limited energy and the poor deployment environment of wireless sensor network (WSN) on data transmission,a trust sensing based secure routing mechanism (TSSRM) with the lightweight characteristics and the ability to resist many common attacks simultaneously was proposed.Based on the analysis of the characteristics of network attack,the trust degree calculation model was constructed by combining node’s behavior with energy,at the same time the security route selection algorithm was also optimized by taking trust degree and QoS metrics into account.Performance analysis and simulation results show that TSSRM can improve the security and effectiveness of WSN.     

基于拓扑感知时间时序的动态路由策略

针对当前网络路由策略存在的不足,提出一种基于拓扑感知时间时序的动态网络路由策略.首先在分析了当前网络路由策略基础,在网络拓扑发生变化时,计算节点对拓扑变化感知时间,然后根据感知时间构建数据转发的路由表,最后根据路由表节点序列建立动态路由查找策略,并采用仿真模拟实验对其性进行验证.实验结果表明,拓扑感知时间时序的动态路由策略可以真实地反映网络拓扑变化对路由影响,提高了网络路由的模拟效率,具有广泛的应用前景.