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在移动自组织网络中,相对于单路径路由算法而言,多路径路由算法可以均衡网络负载、提高路由的可靠性。通过对AOMDV路由协议进行改进,提出了基于能量感知和链路稳定度的多径MANET路由协议ELMRP。ELMRP协议综合考虑了节点的剩余能量和链路稳定度,根据路径的剩余能量和稳定度计算代价值,按照代价值在多条节点不相交路径上分配数据流量。仿真结果表明,和AOMDV路由协议相比,ELMRP协议延长了网络的生存时间,提高了数据分组递送率,降低了路由发现频度。 相似文献
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通过对AOMDV多径协议进行改进,提出了一种基于节点剩余能量策略MMBCR的多径协议(EAOMDV)。改进协议以节点剩余能量为备份路径的度量对AOMDV多径协议进行改进。使用NS2软件进行仿真,通过改变节点的暂停时间来比较EAOMDV协议和AOMDV协议的性能。仿真结果表明,与AOMDV多径协议相比,新协议路由开销和丢包率有所增加,但降低了网络的总能耗并减少了某时刻耗尽能量的节点数目,从而延长了网络的存活时间。 相似文献
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由于节点是随机移动的,且其电池容量有限,在无线Ad Hoc网络(自组织网络)中减少能源消耗以延长网络生存期、保证节点的安全性是研究多路径路由中的主要问题。文章分析了AODV(基于距离矢量单路径按需路由)协议和AOMDV(基于距离矢量多路径按需路由)协议的一些基本特点,在考虑安全网格定位服务的基础上,结合能源熵,提出了一种新的安全多路径路由协议-EEBSMRP。仿真计算结果表明,EEBSMRP在发现最小的节点能源消耗路由、平衡各个节点能源利用率、延长整个网络生存期以及安全性方面有较大的改进。 相似文献
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移动自组网MANET是由许多移动节点组成的无中心的、多跳的自组织网络,网络中的节点由于移动和能量耗尽可能会使得路径失效,因此传统的单路径协议效率并不高。本文介绍了自组网中最常用的AODV协议,重点对AOMDV多路径路由协议的路由机制和维护管理进行了探讨。最后使用NS2仿真软件对两种协议进行了比较,结果表明,在分组投递率和端到端延时方面,AOMDV比AODV更具优势。 相似文献
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Ad Hoc网络因具备无需基础设施的灵活性,使其越来越得到重视,但因受无线带宽有限、节点频繁移动、电池能量制约的影响,移动Ad Hoc网络民用化仍面临很多挑战。文章在全面分析Ad Hoc网络路由协议的基础上,为了避免节点频繁移动而造成网络资源浪费,提出了基于AODV协议的多路径路由协议TRND-AODV,并分析了使用OPNET仿真平台得出的仿真结果。仿真结果表明当网络负载较大时,多路径路由协议在时延等多方面性能显著提高。 相似文献
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本文主要研究基于异构网络的AOMDV协议并发多路传输问题。本文首先介绍了关于异构融合网络中的相关知识;接着重点分析了多路径路由算法AOMDV的具体实现过程。并且提出以路径稳定度作为路径选择依据,提高链路的稳定度,减少路径断裂的概率和路由发现的次数。最后通过实验对AODV、AOMDV以及AOMDV-SPC在吞吐量、网络时延上的结果进行了仿真;验证了我们依据的有效性。 相似文献
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For effective routing in wireless mesh networks, we proposed a routing metric, expected path throughput (EPT), and a routing protocol, expected path throughput routing protocol (EPTR), to maximize the network throughput. The routing metric EPT is based on the estimated available bandwidth of the routing path, considering the link quality, the inter- and intra-flow interference and the path length. To calculate the EPT of a routing path, we first calculate the expected bandwidth of the link and the clique, and then consider the decay caused by the path length. Based on EPT, a distributed routing protocol EPTR is proposed, aiming to balance the network load and maximize the network throughput. Extensive simulations are conducted to evaluate the performance of the proposed solution. The results show that the proposed EPTR can effectively balance the network load, achieve high network throughput, and out-perform the existing routing protocols with the routing metrics previously proposed for wireless mesh networks. 相似文献
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Wireless sensor network consists of sensor nodes with battery operated device. The key challenges in the wireless sensor network are energy consumption and routing optimization. This work presents the cluster based load balancing (CBLB) routing protocol. The proposed routing protocol is used to minimize the energy consumption and increase the routing performance. It avoids the routing robustness, delay and increases the delivery rate and network performance. In existing techniques, different routing protocols such as LEACH, HEED and MESTER were used to increase the network performance and to decrease the energy consumption. But these existing techniques did not satisfy the performance requirements of wireless sensor networks. Hence, there is a requirement to develop a technique that meets the QoS requirements and needs of wireless sensor network. The proposed CBLB routing protocol creates a cluster head in the decentralized network and the cluster head will be used to distribute the workload evenly to the cluster members for reducing the energy consumption in wireless sensor network. Experimental results analyze the performance of the proposed protocol with the different existing protocols. The proposed protocol achieves high throughput, delivery rate and reduces the energy consumption, delay and routing overhead. 相似文献
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建立了一个适合3D-NoC片上实现的路由器功耗模型,并且结合奇偶拐弯模型提出了一种面向功耗的3D-NoC路由协议.根据网络的功耗状况动态路由,优化网络功耗分布,有效避免局部功耗过大.实验结果显示,该协议能够明显改善网络功耗分布,其最大功耗和功耗方差在最优情况下可分别优化11.57%和24.61%. 相似文献
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该文针对水下物联网(IoUT)数据传输问题设计了一种混合地理路由协议。海洋环境的复杂性严重地限制了IoUT水下物联网节点间的数据传输性能,因此需要一个高效的路由协议以对抗复杂的信道环境。无状态几何路由(G-STAR)是一种采用贪婪转发模式的地理路由协议,在大多数3维物联网情景中能够找到合适的数据传输路径,然而水下环境中存在诸多不利因素制约了G-STAR的性能。对此,该文提出一个混合G-STAR(Hybrid G-STAR, H-G-STAR)协议,在保有G-STAR优势的基础上对协议在水下环境中的适应性进行了针对性设计。通过增加基于信道监听的无协作转发策略,在节点数量足够时自发地选择信道状况最佳的路径进行路由,由此避开贪婪转发在水下环境中可能遭遇的极端劣化信道。仿真结果显示H-G-STAR协议相较于基准G-STAR协议有着更好的路由性能,并且在物理层能够取得更低的误比特率(BER),在水下节点的网络拓扑中更为适用。 相似文献
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应用于无线Mesh路由协议的研究 总被引:3,自引:2,他引:1
文章在研究应用于无线Mesh网络的DSR协议多播过程中发现会产生网络风暴问题,对此提出了一种均衡流量的距离门限动态源路由协议,对它进行仿真,仿真结果表明使用了该方法的路由算法在吞吐量上较原算法有较大改善。 相似文献
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Liuguo Yin Changmian Wang Geir E. Øien 《International Journal of Wireless Information Networks》2009,16(3):154-164
The routing energy efficiency of a wireless sensor network is a crucial issue for the network lifetime. In this article, we propose MICRO (MInimum Cost Routing with Optimized data fusion), an energy-efficient routing protocol for event-driven dense wireless sensor networks. The proposed routing protocol is an improvement over the formerly proposed LEACH and PEGASIS protocol, which is designed to be implemented mainly with node computations rather than mainly with node communications. Moreover, in the routing computation the proposed scheme exploits a new cost function for energy balancing among sensor nodes, and uses an iterative scheme with optimized data fusions to compute the minimum-cost route for each event-detecting sensor node. Compared to the PEGASIS routing protocol, MICRO substantially improves the energy-efficiency of each route, by optimizing the trade-off between minimization of the total energy consumption of each route and the balancing of the energy state of each sensor node. It is demonstrated that the proposed protocol is able to outperform the LEACH and the PEGASIS protocols with respect to network lifetime by 100–300% and 10–100%, respectively. 相似文献