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无线移动自组织网路由协议性能研究 总被引:1,自引:0,他引:1
路由是无线移动自组织网的关键技术之一。目前已经提出的MANET路由协议有很多种,因此如何针对一定应用场景选择一个最佳的路由协议,是人们十分关心的一个问题。该文对已经通过IETF认可的三种MANET路由协议:DSR、AODV和OLSR进行了仿真对比分析。设计了大量的场景,通过对路由协议的分组传送率、端到端时延和所选路径长度等指标的比较,得出了在不同的网络环境下MANET最佳路由协议选择方案。仿真中发现同是采用按需的路由发现策略的DSR和AODV在高移动、高负荷的网络环境下的性能存在较大差异,对此原因进行了深入分析,并根据分析对DSR提出了改进方案。 相似文献
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能量消耗问题是MANET网络中研究的热点问题之一.针对基于位置的路由协议没有考虑节点剩余能量的问题,提出了一种结合位置信息和剩余能量的路由协议.本协议是在AODV[1]协议的基础上,提出了两个新的算法:基于位置的算法LBA(Location-Based Alaorithm)和动态能量控制的算法(DPC),并用NS2仿真比较了这两种协议.仿真结果表明,尽管改进的协议平均的端到端的延时增加,但是其能够明显地减少网络的总的耗能,平均了网络节点的耗能,延长了整个网络的寿命. 相似文献
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本文首先阐述了移动Ad Hoc网络的特点及应用。接着对当前的几种Ad Hoc网络的QoS主要路由协议进行了分析,特别是对IETF的MANET推荐的AODV路由协议作了详细的分析。并从路由机制、单向链路的支持、多播功能、QoS参数选择以及节能几个方面进行了比较和分析。 相似文献
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传统的MANET路由协议是基于最小跳数的路由,没有考虑链路质量,不能适应网络拓扑的动态变化。针对这一问题,提出了一种Ad Hoc网络链路质量QoS多路径按需路由协议(QMORP)。QMORP采用移动预测来计算链路的生存时间,应用能量模型获得链路的剩余能量,综合链路生存时间和剩余能量两种因素来计算链路质量。选择链路质量大的路径转发分组。仿真实验表明,相比AOMDV协议,QMORP协议提高了网络的生命周期,降低了网络的平均端对端延迟、提高了网络的发包率和吞吐率。 相似文献
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对Ad Hoc网络中典型的主动路由协议DSDV和按需路由协议AODV进行了分析与仿真,仿真结果表明,在相同的速率下,AODV协议下的网络投递率要高于DSDV,但是DSDV协议下的路由负载变化要比AODV协议下平稳. 相似文献
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多径路由协议AOMDV的改进与性能分析 总被引:1,自引:0,他引:1
移动无线自组网是一种移动多跳无线网络,有效的路由算法是关键。由于移动自组网的移动性,会使得无线自组网按需多径距离矢量路由(AOMDV)协议的活动路由不再是最短路径。针对此不足,提出了改进方法:构建两跳路由,然后利用两跳路由信息对活动路由进行动态优化,使路径更短。NS一2仿真结果表明,改进的AOMDV协议在路由发起频率、端到端平均时延、归一化路由开销和数据分组投递率等方面的性能均比AOMDV效果好。 相似文献
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Ad Hoc网络是由一组移动节点在没有任何现存网络基础设施或是集中管理的情况下形成的动态网络.论文利用NS2网络仿真软件,在不同的网络负载、移动性和网络规模等条件下,分析比较Ad Hoc网络的四种路由协议DSR、AODV、DSDV和洪泛协议的性能.仿真结果表明由于各协议适用范围不同,因此可根据具体情况自适应地进行协议选择. 相似文献
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为了提出适合Ad Hoc实际网络环境的路由协议,分析了按需距离矢量路由协议(AODV)的基本原理和局限性,在此基础上介绍现有的三种改进协议:基于区域路由的增强AODV协议(AOZDV),基于AODV和DSR的层次路由协议(DOA)以及稳定性增强的AODV改进协议(SAODV),并对比分析了各自的优势和适用场合。NS2仿真结果表明,AOZDV适用于网络拓扑变化较为频繁的场景;DOA在大型网络中显示了其优势,较大地降低了路由负载;而SAODV提供了一条较为稳定的路由,提高了数据包成功发送率。 相似文献
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Mobile Ad Hoc Networks (MANET) allows versatile communication between host devices moving around in a state of flux. These networks have no fixed infrastructure thus making the routing of packets a continuous challenge to be optimally delivered under varying criteria such as when the number of nodes within an area increases the scope for interference between nodes which also increases significantly. Additionally, MANETs have low stability in areas with fast moving nodes which leads to their reduced longevity. This paper proposes a method by adapting the standard Ad hoc On-Demand Distance Vector (AODV) protocol to dynamically adjust transmission power usage, which is titled Dynamic Power-Ad hoc On-Demand Distance Vector (DP-AODV). This method uses the dependence of a transmission range on density to achieve this improvement. The results demonstrate that as density increases, DP-AODV shows decrease in delay than AODV and offering better performance for highly populated networks exceeding 200 nodes. The simulation results show that DP-AODV increase network throughput whilst reducing the node interference in a dense region, as well as it enhances the overall network performance with respect to the increased packet delivery fraction, reducing the control overheads and jitter, enhancing overall throughput, reducing interferences and finally, shortening end-to-end delay in medium to high density conditions. 相似文献
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《Computer Networks》2003,41(6):687-706
Several routing algorithms for mobile ad hoc networks have been proposed in the recent past [Broch et al., The Dynamic Source Routing Protocol for Mobile Ad Hoc Networks, Internet Draft draft-ietf-manet-dsr-03.txt, October 1999; Perkins et al., Ad Hoc On Demand Distance Vector (AODV) Routing, Internet Draft draft-ietf-manet-aodv-04.txt, October 1999; Haas and Pearlman, The Zone Routing Protocol (ZRP) for Ad Hoc Networks, Internet Draft draft-zone-routing-protocol-01.txt, August 1998; IEEE J. Select. Areas Commun. 17 (8) (1999) 1454]. With the exception of a few, these protocols (i) involve all nodes in the route management process, (ii) rely on the use of broadcast relays for route computation, and (iii) are primarily reactive in nature. Related work [Broch et al., Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing Protocols, Proceedings of IEEE MOBICOM, Dallas, TX, October 1998; Johansson et al., Scenario-based Performance Analysis of Routing Protocols for Mobile Ad-hoc Networks, Proceedings of IEEE MOBICOM, Seattle, August 1999] has shown that the capacity utilization in ad hoc networks decreases significantly when broadcast relays or “broadcast storms” are performed frequently. This effect is compounded when all nodes in the network take part in the route computation.We propose and study an approach based on overlaying a virtual infrastructure (adaptation of the core, proposed in [IEEE J. Select. Areas Commun. 17 (8) (1999) 1454]) on an ad hoc network and operating routing protocols over the infrastructure. The core enables routing protocols to use only a subset of nodes in the network for route management and avoid the use of broadcast relays. We evaluate the performance of dynamic source routing (DSR) [Broch et al., The Dynamic Source Routing Protocol for Mobile Ad Hoc Networks, Internet Draft draft-ietf-manet-dsr-03.txt, October 1999] and AODV [Perkins et al., Ad Hoc On Demand Distance Vector (AODV) Routing, Internet Draft draft-ietf-manet-aodv-04.txt, October 1999], when they are operated over the core and compare their performances against those of their basic versions. Through extensive simulations using ns-2 [Fall and Vardhan, ns notes and documentation, available from http://www-mash.cs.berkeley.edu/ns/, 1999], we show that using a virtual infrastructure significantly improves the performance of both DSR and AODV, in terms of data delivery and routing overhead, under varied network characteristics. 相似文献
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基于甚高频数据交换系统(VHF Data Exchange System,VDES),通过分析海上真实船舶运动特征,提出一种符合船舶移动特征的移动模型——船舶平滑转向的高斯马尔可夫移动模型。针对性地研究了不同船舶节点密度环境中的自组织网络路由协议,仿真分析了不同自组织网络路由协议应用于VDES时的数据传输性能。结果表明,按需距离矢量(Ad Hoc on-demand Distance Vector,AODV)路由协议明显优于其他路由协议,可将其作为VDES下船联网系统最优路由选择方案。 相似文献
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徐艳玲 《网络安全技术与应用》2014,(10):25-25
当Ad Hoc网络的拓扑发生变化后,传统的AODV(Ad Hoc Ondemand Distance Vector,按需距离矢量)路由协议需要以较大的开销并花费较多的时间才能重新找到一条路由.为了改善传统AODV协议的性能,本文提出了一种改进的AODV(Improved Ad Hoc Ondemand Distance Vector,简称IAODV)路由协议.性能仿真表明,本文所提的IAODV协议能够有效地减少路由开销,提升路由效率. 相似文献
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基于无线传感器网络的农业信息采集系统路由设计研究 总被引:1,自引:0,他引:1
基于无线传感器网络的AdHoc自组网技术及AODV技术,结合适用于农业环境参数传输的路由特点,完成了农业信息远程数据采集与无线传输网络的路由报文设计,并给出了按需平面距离矢量路由协议(AODV)的工作流程。该方案具有体积小、成本低、功耗低的特点,支持网状拓扑结构,可以快速组网,顺利读取农业环境的土壤温度、湿度、光照等信息。 相似文献
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多路径路由是AdHoc网络路由协议族中一个重要的分支,多路径路由能够给m7络提供更好的通信质量和更高的传输速度。首先介绍了移动AdHoc网络多路径路由技术的概念和特点,对典型的几种多路径路由协议进行了分析,并进一步讨论了当前研究的重点和关键技术。 相似文献