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Seyed Javad Mirabedini Mohammad Teshnehlab M. H. Shenasa Ali Movaghar Amir Masoud Rahmani 《浙江大学学报(A卷英文版)》2008,9(12):1666-1675
We propose a novel approach called adaptive fuzzy ant-based routing （AFAR）, where a group of intelligent agents （or ants） builds paths between a pair of nodes, exploring the network concurrently and exchanging obtained information to update the routing tables. Routing decisions can be made by the fuzzy logic technique based on local information about the current network state and the knowledge constructed by a previous set of behaviors of other agents. The fuzzy logic technique allows multiple constraints such as path delay and path utilization to be considered in a simple and intuitive way. Simulation tests show that AFAR outperforms OSPF, AntNet and ASR, three of the currently most important state-of-the-art algorithms, in terms of end-to-end delay, packet delivery, and packet drop ratio. AFAR is a promising alternative for routing of data in next generation networks. 相似文献
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A load-balanced minimum energy routing algorithm for Wireless Ad Hoc Sensor Networks 总被引：3，自引：0，他引：3
CAI Wen-yu JIN Xin-yu ZHANG Yu CHEN Kang-sheng 《浙江大学学报(A卷英文版)》2006,7(4):502-506
INTRODUCTION Wireless Sensor Network is one special type of wireless ad hoc networks without fixed infrastructure consisting of a collection of sensor nodes, and oper- ating on limited amount of battery energy consumed mostly in transmission and reception. In the WSNs described in Fig.1, every sensor node can sense, process data and communicate to base station (BS). WSNs have attracted much attention during the recent two years and some commercial implementations such as environmental … 相似文献
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By using hyper-graph theory,this paper proposes a QoS adaptive topology configuration(QATC) algorithm to effectively control large-scale topology and achieve robust data transmitting in synchronous wireless sensor networks.Firstly,a concise hyper-graph model is abstracted to analyze the large-scale and high-connectivity network.Secondly,based on the control theory of biologic "Cell Mergence",a novel self-adaptive topology configuration algorithm is used to build homologous perceptive data logic sub-network ... 相似文献
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无线传感器网络中节点的位置信息非常重要,目前通用的定位算法不适合恶劣环境;路由算法的设计直接影响到系统的能量消耗。在此提出一种基于测距的节点定位方案,并构建基于睡眠机制、最小成本路径的节能路由算法,通过理论分析和仿真实验,证明该算法具有较高的节能性,能提高网络的整体性能。 相似文献
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无线传感器网络因其明显的性能优势和巨大的应用前景而受到学术界和工业界越来越广泛的重视。在无线传感器体系结构中,网络层路由协议是无线传感网络的核心问题。文章阐述了无线传感器网络的特点,路由协议的要求,并对重要的路由协议工作原理进行了技术分析,从协议性能的角度比较了各个路由协议的特点,最后在文中对WSN路由协议的研究仍存在的问题和挑战进行了论述,指出了未来无线传感器网络路由协议的研究方向。 相似文献
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无线传感器网络作为一种新型的以采集数据为目的、高密度、自组织、低数据率的短距离无线通信网络,在国外相关研究领域一直是热点.文章概要地介绍了无线传感器网络的特点、应用前景以及研究热点,强调了无线传感器网络的路由协议设计方式不同于现有的有线及无线网络.特别阐明了作为一个以环境监测为主要应用的自组织网络,在现有器件的条件下,网络寿命这一关键参数主要取决于对传感器节点的能耗有重大影响的路由协议,着重研究了如何从网络层的路由协议和算法设计着手实现功率控制,以达到节约能耗、延长网络寿命这一目的. 相似文献
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提出了一种无线传感器网络中基于蚁群算法的单向链路路由算法,该算法采用单向链路和双向链路相结合的方法,寻找源节点到目的节点的最优路径。仿真结果表明,该算法能够选择参数性能好的路径,最优路径上的总时延远远小于只支持双向链路的传统蚁群算法,而且最优路径的收敛速度明显加快,由此节省了无线传感器网络中的能耗。 相似文献
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INTRODUCTION Some new emerging applications involve in- formation transmission in a network. Different from traditional single-cast applications, these new arising applications are called multicast as they contain a single sender and multiple receivers. In general, it is needed to construct a multicast routing tree to deliver information along the tree branches. Because links in the tree are shared by paths to different receivers, just one information copy is needed in the middle node. Th… 相似文献
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无线Mesh网络作为一种新型的无线网络,路由协议对网络整体性能起着至关重要的作用。分析目前基于无线MeshN络的三种典型路由协议DSR、AODV及DSDV,利用仿真软件NS2比较这三种协议在分组成功投递率、平均时延、路由开销以及选择较优路径方面的性能表现,结果表明,按需路由协议DSR在分组成功投递率、平均时延、路由开销以及选择较优路径方面较AODV、DSDV有较好表现。 相似文献
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卢旭 《广东技术师范学院学报》2011,(9):16-18
RFID和无线传感器网络的融合有多种方式,本文在智能阅读器节点网络模型下,针对周期响应型网络,分析了RFID无线传感器网络路由协议的特点,并将DUC路由协议应用于网络当中,仿真实验结果表明DUC是一种适用于RFID无线传感器网络的路由协议. 相似文献
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分析无线Ad-hoc网现有的几种主要路由算法类型,它们包括proactive类、reactive类。着重分析地理路由算法。对于近年来的研究热点地理路由算法的类型进行分析,其中包括以路径为优化目标、以服务质量为优化目标和以最小能量为优化目标等几种类型。在此基础上,提出了概率路由算法的概念和一个新的算法。理论分析表明,该算法在该领域内是较好的算法。 相似文献
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林乔军 《湖南科技学院学报》2009,30(4)
文章从无线传感器网络特点出发,对两个基于按需路由协议DSR的SRP和Ariadne分析,发现了新的攻击.针对SRP和Ariadne不足,提出一种新的高效路由协议EndairA.并通过NS-2仿真实验从分组发送成功率和不同节点数的点到点的时延两个方面进行性评评价.结果表明EndairA算法能更好的节省和均衡网络中节点的能量消耗,并能满足能量高效性和网络可扩展性的要求. 相似文献
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本文提出了适用于物联网视频多跳中继无线通信的实现能量预估的网络层叠协同路由交互寻访技术。该技术的前提是采用遗传算法设计轮询步进优化估值模型,依据估值模型计算节点感知距离和节点能量,结合无线大容量信号编码解调码过程建立层叠协同交互寻访体系,优化簇内、簇头节点的传输效能,实现用户层、网络通信层和感知层层叠路由的交互协同。经软件仿真和数学矩阵对比,该技术可较好地满足物联网视频等大容量感知数据的传输与处理,而且可以充分利用物联网层叠资源特别是感知层与链路层受限的运算、存储和能量等资源。 相似文献
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移动AdHoc网是一种分布式无线网络,路由协议是移动AdHoc网络当前研究的热点之一．该文列举了几种常见的路由协议,分析了AOMDV多径路由协议的不足,采用链路检测机制,对AOMDV协议进行了改进,提出了预警式路由协议（E-AOMDV）,并通过NS2模拟软件对两种路由协议进行了模拟,通过分析得出,E—AOMDV协议在端到端延迟等性能方面略优于AOMDV协议． 相似文献
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INTRODUCTION Real-time video transport over wireless Internet faces many challenges due to the heterogeneous en- vironment including wireline and wireless networks. Fig.1 shows a typical end-to-end video transport in- volving wireline and wireless networks. The video transport may suffer from many problems such as wireline network congestion and wireless multi-path fading, resulting in high packet loss-rate, and causing severe video quality degradation. To maintain the optimal video quali… 相似文献
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The flooding distance is an important parameter in the design and evaluation of a routing protocol,which is related not only to the delay time in the route discovery,but also to the stability and reliability of the route.In this paper, the average flooding distance (AFD) for a mobile ad hoc network (MANET) in a random graph model was given based on the dynamic source routing (DSR) protocol.The influence of spatial reuse on the AFD was also studied.Compared with that in the model without the spatial reuse,the AFD in the model with the spatial reuse has much smaller value,when the connetivity probability between nodes in the network is small and when the number of reused times is large.This means that the route discovery with the spatial reuse is much more effective. 相似文献
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Algorithm for Delay-Constrained Minimal Cost Group Multicasting 总被引：1，自引：0，他引：1
Group multicast routing algorithms satisfying quality of service requirements of real-time applications are essential for high-speed networks. A heuristic algorithm was presented for group multicast routing with bandwidth and delay constrained. A new metric was designed as a function of available bandwidth and delay of link, And source-specific routing trees for each member were generated in the algorithm by using the metric, which satisfy member＇s bandwidth and end-to-end delay requirements. Simulations over random network were carried out to compare the performance of the proposed algorithm with that from literature. Experimental results show that the algorithm performs better in terms of network cost and ability in constructing feasible multicast trees for group members. Moreover,the algorithm can avoid link blocking and enhance the network behavior efficiently. 相似文献
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Abigail Powell Andrew Dainty Barbara Bagilhole 《European Journal of Engineering Education》2012,37(6):541-556
In the UK, women remain under-represented in engineering and technology (E&T). Research has, therefore, investigated barriers and solutions to women's recruitment, retention and progression. Recruitment into the sector may be supported by exploring the career decisions of women and men who have chosen to study E&T. Triangulating quantitative and qualitative data from E&T students at a UK university, this paper examines the gendered nature of career choice narratives. It finds that women often maintain contradictory views; upholding gendered stereotypes about women's suitability for the so-called masculine work, yet also subscribing to ideals that the sector is accessible to all who wish to work in it. This is explained using an individualist framework in which women construct an autonomous sense of self, yet are also shaped by a gendered self. Women's discourse around career choice, therefore, reveals the problematic nature of gender norms for achieving gender equity in E&T. 相似文献
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智能型教室是无线传感器网络的重要应用领域,如何在有限的电池能量约束下提高网络系统的使用寿命是一个重要的研究方向。引入一种改进的路由方案,将其与传统路由协议在仿真环境下进行比较,实验结果表明,随着无线传感器节点数量的增加,新路由协议的能源效率有较明显的增长。 相似文献