共查询到19条相似文献,搜索用时 93 毫秒
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林晓鹏 《智能计算机与应用》2017,7(6):32-34,38
能量效率是衡量无线传感器网络性能最重要的指标,介绍了无线传感器网络节点结构,分析了无线传感器节点的主要能耗源.讨论动态能量管理和动态电压调整等提高传感节点能效的技术,从物理层、链路层、网络层、传输层等层次论述了无线传感器网络拓扑所采用的能效机制,最后对功率控制技术进行了分析. 相似文献
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由于无线传感器网络中的能量有限的特性,所以降低节点能耗,延长网络寿命在无线传感器网络中显得十分重要。低功耗的无线传感器网络协议,是无线传感器网络在应用中的一项重要技术。本文从无线传感器网络能耗方面出发,对BMAC、XMAC的优缺点进行了详细分析、提出了一个改进,并且基于Tinyos平台进行了实验,验证了低功耗协议良好的能耗特性。 相似文献
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能量供应与消耗目前影响无线传感器网络生存时间的主要因素。介绍了无线传感器网络节点组成,从硬件消耗和软件消耗两方面分析了影响能量消耗的主要因素,阐述了降低能耗、延长网络生存时间的的5种基本策略,并对无线传感器网络的能量供应方式的发展作了分析预测。 相似文献
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ZigBee无线传感器网络节点的能耗研究 总被引:2,自引:0,他引:2
基于ZigBee技术的无线传感器网络具有巨大的应用前景.由于网络节点能量有限,如何最大限度地利用有限能量,提高网络节点的生命周期是关键问题.本文系统分析了ZigBee无线传感器网络节点中各个部分引起的能量消耗,提出从节点硬件结构和网络协议两方面来降低网络系统能耗,延长网络生命周期的策略. 相似文献
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基于太阳能的温室无线传感器网络监测系统设计 总被引:7,自引:0,他引:7
设计提出了基于太阳能的温室无线传感器网络监测系统设计,利用无线收发设备传输数据,无需专门架线,系统结构简单,节省了人力物力,通过监测管理中心可实现对温室温湿度的控制、二氧化碳含量测量、光照度信息采集和图像监控等功能,实现真正意义上的无人值守,与普通无线技术相比,还具有低功耗、低成本和网络容量大等特点.传感器节点采用基于太阳能的能量供给系统无线传感器网络节点结构.该结构采用MSP430超低功耗MCU以及低功耗网络传输芯片nRF24L01,尽可能降低系统能耗.另外,该系统利用多级能量内存,结合能量管理与能量转移技术,使由太阳能电池采集到的能量得到合理的利用,从而构成具有自我管理能力的能量供给系统,实现了为无线节点永久性供电与无线传感网络无限使用的目的. 相似文献
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传感器网络节点是能量受限的节点,节点的能耗以及路由选择是影响传感器网络鲁棒性的重要因素之一。本文提出一种基于能耗预测来确定路由选择的方法,使得剩余能量较低、预测的传输能力较差的节点避开路由传输,避免传输失败引起的网络瘫痪,增强无线传感器网络的鲁棒性。 相似文献
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An optimum sensor node deployment in wireless sensor network can sense the event precisely in many real time scenarios for example forests, habitat, battlefields, and precision agriculture. Due to these applications, it is necessary to distribute the sensor node in an efficient way to monitor the event precisely and to utilize maximum energy during network lifetime. In this paper, we consider the energy hole formation due to the unbalanced energy consumption in many-to-one wireless sensor network. We propose a novel method using the optimum number of sensor node Distribution in Engineered Corona-based wireless sensor network, in which the interested area is divided into a number of coronas. A mathematical models is proposed to find out the energy consumption rate and to distribute the optimum number of sensor node in each corona according to energy consumption rate. An algorithm is proposed to distribute the optimum number of sensor nodes in corona-based networks. Simulation result shows that the proposed technique utilized 95 % of the total energy of the network during network lifetime. The proposed technique also maximizes the network lifetime, data delivery and reduce the residual energy ratio during network lifetime. 相似文献
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In the wireless sensor networks, high efficient data routing for the limited energy resource networks is an important issue. By introducing Ant-colony algorithm, this paper proposes the wireless sensor network routing algorithm based on LEACH. During the construction of sensor network clusters, to avoid the node premature death because of the energy consumption, only the nodes whose residual energy is higher than the average energy can be chosen as the cluster heads. The method of repeated division is used to divide the clusters in sensor networks so that the numbers of the nodes in each cluster are balanced. The basic thought of ant-colony algorithm is adopted to realize the data routing between the cluster heads and sink nodes, and the maintenance of routing. The analysis and simulation showed that the proposed routing protocol not only can reduce the energy consumption, balance the energy consumption between nodes, but also prolong the network lifetime. 相似文献
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多路径数据传输是无线传感器网络亟需解决的一个关键问题.本文针对节点故障、链路失效和外界干扰影响网络稳定性和可靠性,提出一种基于混合蛙跳算法的无线传感器网络多路径传输策略.首先我们详细介绍了蛙跳算法及其原理,之后我们将其应用到无线传感器网络多路径传输策略之中,接着运用混合蛙跳算法对传感网络节点其进行更新、划分、重组以便选择出最优节点建立传输最优路径,提高网络的稳定性和可靠性.通过算法仿真与结果对比提出的算法与AODV、粒子群PSO算法相比,在网络能耗、传输时延、丢包率、连通率和可靠度等方面都具有较好的性能.其中网络能耗比AODV、PSO算法降低了62.5%和35.8%. 相似文献
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A wireless sensor network is a network of large numbers of sensor nodes, where each sensor node is a tiny device that is equipped with a processing, sensing subsystem and a communication subsystem. The critical issue in wireless sensor networks is how to gather sensed data in an energy-efficient way, so that the network lifetime can be extended. The design of protocols for such wireless sensor networks has to be energy-aware in order to extend the lifetime of the network because it is difficult to recharge sensor node batteries. We propose a protocol to form clusters, select cluster heads, select cluster senders and determine appropriate routings in order to reduce overall energy consumption and enhance the network lifetime. Our clustering protocol is called an Efficient Cluster-Based Communication Protocol (ECOMP) for Wireless Sensor Networks. In ECOMP, each sensor node consumes a small amount of transmitting energy in order to reach the neighbour sensor node in the bidirectional ring, and the cluster heads do not need to receive any sensed data from member nodes. The simulation results show that ECOMP significantly minimises energy consumption of sensor nodes and extends the network lifetime, compared with existing clustering protocol. 相似文献
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Wireless sensor networks become very attractive in the research community, due to their applications in diverse fields such as military tracking, civilian applications and medical research, and more generally in systems of systems. Routing is an important issue in wireless sensor networks due to the use of computationally and resource limited sensor nodes. Any routing protocol designed for use in wireless sensor networks should be energy efficient and should increase the network lifetime. In this paper, we propose an efficient and highly reliable query-driven routing protocol for wireless sensor networks. Our protocol provides the best theoretical energy aware routes to reach any node in the network and routes the request and reply packets with a lightweight overhead. We perform an overall evaluation of our protocol through simulations with comparison to other routing protocols. The results demonstrate the efficiency of our protocol in terms of energy consumption, load balancing of routes, and network lifetime. 相似文献
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Vandana Milind Rohokale Sandeep Inamdar Neeli Rashmi Prasad Ramjee Prasad 《Wireless Personal Communications》2013,69(3):1087-1096
For wireless sensor networks (WSNs), energy is a scarce resource. Due to limited battery resources, the energy consumption is the critical issue for the transmission as well as reception of the signals in the wireless communication. WSNs are infrastructure-less shared network demanding more energy consumption due to collaborative transmissions. This paper proposes a new cooperative opportunistic four level model for IEEE 802.15.4 wireless personal area network. The average per node energy consumption is observed merely about 0.17 mJ for the cooperative wireless communication which proves the proposed mechanism to be energy efficient. This paper further proposes four levels of cooperative data transmission from source to destination to improve network coverage with energy efficiency. 相似文献
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基于等概率路由模型的传感器网络负载均衡研究 总被引:1,自引:0,他引:1
无线传感器网络的能耗效率与流量负载分布密切相关。论文从微观角度研究了无线传感器网络的负载均衡问题。基于等概率路由模型,分析了拓扑传输结构对于感知数据流量的分流作用。根据分析结果,提出了多对一传输模式下任意节点负载密度的定义和算法。分析了节点的负载密度与传感器网络生命期的关系,进一步论证了在多对一的多跳传感器网络中不能实现完全的负载均衡,但是通过设计合理的拓扑结构可以实现准负载均衡。仿真结果说明,从微观角度得到的节点负载密度可以准确描述无线传感器网络的流量负载分布,由此得到的准负载均衡条件也能实现绝大多数节点的负载均衡。 相似文献