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1.
Reducing the energy consumption of sensor nodes and prolonging the life of the network is the central topic in the research of wireless sensor network (WSN) protocol. The low-energy adaptive clustering hierarchy (LEACH) is one of the hierarchical routing protocols designed for communication in WSNs. LEACH is clustering based protocol that utilizes randomized rotation of local cluster-heads to evenly distribute the energy load among the sensors in the network. But LEACH is based on the assumption that each sensor nodes contain equal amount of energy which is not valid in real scenarios. A developed routing protocol named as DL-LEACH is proposed. The DL-LEACH protocol cluster head election considers residual energy of nodes, distance from node to the base station and neighbor nodes, which makes cluster head election reasonable and node energy consumption balance. The simulation results of proposed protocols are compared for its network life time in MATLAB with LEACH protocol. The DL-LEACH is prolong the network life cycle by 75 % than LEACH. 相似文献
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在分析无线传感器网络(WSN)的能量消耗模型的基础上,提出了一种新的层次型、分布式的能源有效的被动聚类模式EEPCS。采用“智能延迟策略”和“智能启发式选择”产生类首和网关结点,改变了传统被动聚类模式中通信结点能源消耗过快、网络不连通等缺点。理论分析和实验结果表明,EEPCS不仅能够节省通信结点的能量消耗,而且使能量在节点间均衡消耗,延长了网络的生存周期。 相似文献
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Wireless Personal Communications - While several protocols are proposed in performing sub aquatic communication, routing and issues related to efficiency of energy are considered as important for... 相似文献
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Wireless sensor network (WSN) is a group of small power-constrained nodes that sense data and communicate it to the base station (BS).
These nodes cover a vast region of interest (ROI) for several purposes according to the application need. The first challenge encountered in WSNs is how to cover the ROI perfectly and send the monitored data to the BS. Although the energy introduced during setup phase and the violation of energy fairness constraint of dynamic routing topologies, they achieve high network performance in terms of coverage and connectivity. In this paper, we categorize the applications of WSN based on different aspects to show the major protocol design issues. Thus, the energy efficiency of the recent proactive routing protocols is studied from different angles. The energy overhead and energy fairness of each protocol were carefully analyzed. The most energy efficient routing protocols for homogeneous proactive networks were studied and compared to highlight the research challenges and existing problems in this area. The results proved that energy overhead and route selection are the most effective aspects of network lifetime and network efficiency. 相似文献
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编码感知路由可以发现路由中的网络编码机会,减少数据传输次数,提高网络吞吐量,是近年来路由算法研究的一个热点.当前编码感知路由存在编码条件失效、未考虑节点能量的问题,不适合直接应用于无线传感器网络.本文提出基于跨层网络编码感知的无线传感器网络节能路由算法CAER (Cross layer coding Aware Energy efficient Routing).提出并证明了修正后的网络编码条件,以解决编码条件失效问题.基于跨层思想,将网络编码感知机制与拓扑控制、覆盖控制结合,挖掘潜在编码机会.提出综合考虑节点编码机会、节点能量的跨层综合路由度量CCRM (Cross layer Coding aware Routing Metric).仿真结果表明,相比现有编码感知路由,CAER能够提高网络编码感知准确性,增加网络编码机会数量5%~15%,延长网络生存时间8%~12%. 相似文献
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Wireless Personal Communications - Energy efficiency to route data in wireless sensor networks is key concern to enhance network lifetime. In this paper, an energy efficient routing protocol has... 相似文献
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无线传感器网络中传感器节点能量有限,为了提高能量利用率,针对现有算法随机选择簇首、簇结构不合理等缺陷提出了一种新的能量有效的分簇路由算法EERA.EERA采用新的簇首选举、成簇,以及构建簇间路由算法,基于节点剩余能量与节点的相对位置选择簇首、成簇,使剩余能量较多的节点优先成为簇首并且各簇首能较均匀的分布在网络区域内;构建簇间路由时将最小跳数路由算法与改进的MTE算法结合起来,在簇间形成最小跳数、最小能耗路径.仿真结果表明,EERA算法可以均衡全网能量消耗,延长网络的生命周期. 相似文献
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对无线传感器网络节点的能量供应及其管理技术的现状进行了讨论。分析研究了无线传感器网络节点的能量收集原理、技术与方法,认为无线传感器网络节点能量管理应从节能与供能两方面去解决。对环境中存在的各种能源的收集原理与方法进行了分析,这些能源包括太阳能、风能、声能、振动、热电以及电磁场能等。最后提出了传感器节点应该采用尽可能多的方法从环境中吸取能量,以确保传感器节点能够长期、稳定、可靠地工作。 相似文献
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对无线传感器网络节点的能量供应及其管理技术的现状进行了讨论。分析研究了无线传感器网络节点的能量收集原理、技术与方法,认为无线传感器网络节点能量管理应从节能与供能两方面去解决。对环境中存在的各种能源的收集原理与方法进行了分析,这些能源包括太阳能、风能、声能、振动、热电以及电磁场能等。最后提出了传感器节点应该采用尽可能多的方法从环境中吸取能量,以确保传感器节点能够长期、稳定、可靠地工作。 相似文献
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本文提出了能耗高效的非均匀分簇路由协议(EERP).核心为由远及近依次求取各层成簇半径值,使得靠近sink节点的成簇半径小于远离sink节点的成簇半径;以节点剩余能量和相对距离为每个节点确定簇首竞争能力;簇间采用动态路由;依据接收比特值和簇首节点剩余能量发起簇重构.在Omnet++仿真平台下模拟实验结果显示,EERP有效的均衡了全网节点能耗,显著延长了网络生命周期. 相似文献
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在无线传感器网络的路由技术中,基于簇的路由算法在拓扑管理、能耗利用、数据融合等方面都有较强的优势.在分析EECS协议的基础上,提出了EECS协议存在的问题,并相应地修改了成簇算法,设计了ADEECS协议,增强了算法的能量均衡性能.在簇头选举阶段总是选择剩余能量最多的节点,在成簇阶段ADEECS协议同时考虑了节点的剩余能量和节点与基站的距离.仿真结果也证明了ADEECS协议相对于EECS很大地提高了网络的生命周期. 相似文献
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Wireless Personal Communications - Internet of Things (IoT) integrates diverse types of sensors, mobiles and other technologies to physical world and IoT technology is used in a wide range of... 相似文献
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在PHGASIS建链方法的基础上提出了一种改进的建链方法;在此基础上提出了一种基于双层链结构并由基站集中控制的负载均衡、能量有效的路由算法(LBEERA),此算法充分利用了簇状路由算法和链状路由算法的优点.LBEERA算法将网络划分为多个簇,每个簇的节点组成一条低层链,每条链的链头节点形成一条高层链.仿真试验发现,相对于LHACH算法和PHGASIS算法,LBEERA算法增加了网络生存时间,减少了包传输时延. 相似文献
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针对同构无线传感器网络的能源瓶颈问题提出一种能源有效的自适应路由协议,该协议在分布式动态分簇的基础上提出一种班车算法对数据进行逐层汇聚,以减少网络中流动数据包的数量,同时分担簇头节点的计算量。Tossim仿真试验表明该协议能够显著地减少节点的能量开销,提高网络的适应性,有效地延长网络的生命周期。 相似文献
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针对无线传感器网络节点能耗不均匀,容易形成网络分区的问题,提出了一种基于博弈论的无线传感网络路由选择策略,建立传感器节点之间以剩余能量为效用的博弈模型,求解并确定节点剩余能量最优的路由。仿真结果表明,所提出的路由选择策略可以有效地最大化节点的剩余能量,同时当该模型处于纳什均衡解时,每条路径的能耗处于均衡状态,有效地利用了传感器节点的能量资源,避免了网络能量的空洞,延长了网络的生命周期。 相似文献
17.
在通过博弈论概念建立网络模型的基础上,讨论了各种针对特定传感器网络特点的路由算法。归纳了基于博弈论的无线传感器网络路由算法的设计原则和分类方法。详细比较了这些算法的特点、性能差异和应用范围.最后对无线传感器网络路由算法的研究现状进行了总结,并指出未来的研究重点。 相似文献
18.
Wireless Personal Communications - A channel prediction scheme with channel matrix doubling and temporal-spatial smoothing is proposed. With the assumption that the underlying channel model... 相似文献
19.
The participants in the Wireless Sensor Network (WSN) are highly resource constraint in nature. The clustering approach in the WSN supports a large-scale monitoring with ease to the user. The node near the sink depletes the energy, forming energy holes in the network. The mobility of the sink creates a major challenge in reliable and energy efficient data communication towards the sink. Hence, a new energy efficient routing protocol is needed to serve the use of networks with a mobile sink. The primary objective of the proposed work is to enhance the lifetime of the network and to increase the packet delivered to mobile sink in the network. The residual energy of the node, distance, and the data overhead are taken into account for selection of cluster head in this proposed Energy Efficient Clustering Scheme (EECS). The waiting time of the mobile sink is estimated. Based on the mobility model, the role of the sensor node is realized as finite state machine and the state transition is realized through Markov model. The proposed EECS algorithm is also been compared with Modified-Low Energy Adaptive Clustering Hierarchy (MOD-LEACH) and Gateway-based Energy-Aware multi-hop Routing protocol algorithms (M-GEAR). The proposed EECS algorithm outperforms the MOD-LEACH algorithm by 1.78 times in terms of lifetime and 1.103 times in terms of throughput. The EECS algorithm promotes unequal clustering by avoiding the energy hole and the HOT SPOT issues. 相似文献
20.
Wireless Personal Communications - The widespread use of wireless sensor devices and their advancements in terms of size, deployment cost and user friendly interface have given rise to many... 相似文献
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