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系统仿真是无线传感器网络研究的重要手段。在分析和比较相关网络仿真工具的基础上,给出一种基于MobilityFramework的传感器网络仿真系统的设计和实现方法。该系统采用层结构,以实现单个传感器节点的分层和各层功能行为定义,节点各层的相互独立使模块代码复用率大大提高;功能上该系统集成了传感器网络能耗、时延和丢包统计模型,并采用后台数据库支持技术,增强了仿真实验的数据储存和处理能力;此外,系统也可支持配置文件和仿真文件的脱平台运行,具有很好的可移植性。通过传感器网络系统相关实验模拟,表明该系统建模快、重构有效、功能完整和实验结果真实可靠,是一种适合无线传感器网络的实验平台。 相似文献
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无线传感器网络用于水下监测是近几年来提出的一种新型网络系统。本文对无线传感器节点TelosB的数据采集软件的设计与实现,进行了详细的分析与研究。无线传感器节点TelosB参与水下传感器网络组网平台,本文从硬件和软件两个角度对TelosB节点进行了详细的分析,提出了扩展口通信组网算法。最后结合TelosB节点扩展口通信参与组网时的通信方式,提出了一种扩展口组网算法—轮询监听算法,解决了应用中的通信问题。 相似文献
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针对无线传感器网络的能量消耗,提出了一种新型高效的低能耗路由算法。基于网格拓扑结构,主要解决了延迟约束下的中继节点选择问题。通过将问题转化为0~1整数线性规划,可以得到最终的中继选择。所研究的算法主要应用于实时无线传感器网络系统,它能够在满足延迟约束的条件下给出低能耗的路由策略。仿真结果表明:提出的算法能有效地减少无线传感器网络的能量消耗,延长网络寿命。 相似文献
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无线传感器网络在军事和民用领域均具有广阔的应用前景,但由于传感器节点资源的限制,网络能否满足在实际应用中的QoS要求是一个重要问题。本文对无线传感器网络的主要QoS指标进行了介绍,并分别从能量效率、丢包率、吞吐量和传输时延等主要QoS指标对三种典型拓扑结构的无线传感器网络进行了分析;实现了基于NS2的无线传感器网络通用仿真平台,借助此平台对典型拓扑结构的传感器网络主要QoS指标进行了仿真验证和分析,得到了不同拓扑结构对无线传感器网络QoS指标的影响程度。 相似文献
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仿真系统对于无线传感器网络尤其是大规模无线传感器网络的性能评价是必不可少的。通过仿真,人们能够在一个可控的环境里研究无线传感器网络,观察由不可预测的干扰和噪声引起的节点间的相互作用,减少投放后的网络维护工作。OMNeT++是一款开源的、基于组件的、模块化的开放网络仿真平台。在OMNeT++平台提供的网络仿真基础类库和开发环境的基础上,紧密结合无线传感器网络自身特点,从仿真模型、实现机制和应用场景等方面设计了无线传感器网络仿真系统,并在Linux操作系统上编程实现。通过实验验证,该仿真模型可以正确仿真MAC 相似文献
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基于OPNET的无线传感器网络节点跨层设计 总被引:4,自引:0,他引:4
无线传感器网络是一类由大量位置相对固定的节点所组成的无线通信网络,其节点能量、计算和通信能力都非常有限,因此,传统网络的层次设计和网络协议都难以应用到无线传感器网络中。为解决这些问题,该文在传统网络层次设计思想的基础上,提出了适用于无线传感器网络节点的跨层网络模型,基于OPNET网络仿真工具实现了节点的跨层网络模型设计,在此基础上实现了无线传感器网络中路由选择和数据汇聚等典型应用的仿真。结果表明,新的跨层网络模型能够很好地描述节点各个层次的功能,便于网络协议的综合设计和集中优化。 相似文献
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The use of mobile nodes to improve network system performance has drawn considerable attention recently. The movement-assisted model considers mobility as a desirable feature,where routing is based on the store-carry-forward paradigm with random or controlled movement of resource rich mobile nodes.The application of such a model has been used in several emerging networks,including mobile ad hoc networks(MANETs),wireless sensor networks(WSNs),and delay tolerant networks(DTNs).It is well known that mobility increases the capacity of MANETs by reducing the number of relays for routing,prolonging the lifespan of WSNs by using mobile nodes in place of bottleneck static sensors,and ensuring network connectivity in DTNs using mobile nodes to connect different parts of a disconnected network.Trajectory planning and the coordination of mobile nodes are two important design issues aiming to optimize or balance several measures, including delay,average number of relays,and moving distance.In this paper,we propose a new controlled mobility model with an expected polylogarithmic number of relays to achieve a good balance among several contradictory goals,including delay,the number of relays,and moving distance.The model is based on the small-world model where each static node has"short"link connections to its nearest neighbors and"long"link connections to other nodes following a certain probability distribution.Short links are regular wireless connections whereas long links are implemented using mobile nodes.Various issues are considered,including trade-offs between delay and average number of relays,selection of the number of mobile nodes,and selection of the number of long links.The effectiveness of the proposed model is evaluated analytically as well as through simulation. 相似文献
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Shayesteh Tabatabaei 《计算机系统科学与工程》2020,35(6):477-494
In recent years, the application of WSNs has been remarkably increased and notable developments and advances have been achieved in this regard. In
particular, thanks to smart, cheaper and smaller nodes, different types of information can be detected and gathered in different environments and under
different conditions. As the popularity of WSNs has increased, the problems and issues related to networks are examined and investigated. As a case in
point, routing issue is one of the main challenges in this regard which has a direct impact on the performance of sensor networks. In WSN routing, sensor
nodes send and receive great amounts of information. As a result, such a system may use lots of energy which may reduce network lifetime. Given the
limited power of a battery, certain method and approaches are needed for optimizing power consumption. One such approach is to cluster sensor nodes;
however, improper clustering increases the load imposed on the clusters around the sink. Hence, for proper clustering, smart algorithms need to be used.
Accordingly, in this paper, a novel algorithm, namely social spider optimization (SSO) algorithm is proposed for clustering sensor network. It is based on the
simulation of the social cooperative behavior of spiders. In the proposed algorithm, nodes imitate a group of spiders who interact with each other according
to biological rules of colony. Furthermore, fuzzy logic based on the two criteria of battery level and distance to sink is used for determining the fitness of
nodes. On the other hand in WSNs with a fixed sink, since the nodes near the sink share multi-hop routes and data and integrated towards the sink, these
nodes are more likely to deplete their battery energy than other nodes of the network. Also In this paper, mobile sink was suggested for dealing with this
problem. For investigating and demonstrating the performance of the proposed method, we compared it with DCRRP and NODIC protocol. The results
of simulation indicated better performance of the proposed method in terms of power consumption, throughput rate, end-to-end delay and signal to noise
ratio and has higher failure tolerance especially in terms of sensor nodes’ failure. 相似文献
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无线传感器网络(WSNs)目前已成为国内外备受关注的研究热点,作为一种新的信息获取和处理模式,WSNs已广泛应用于军事、医疗、环境监测等各个领域。而WSNs节点的存储能力和功耗成为目前设计人员面临的最大挑战。文中以此为出发点,研究比较了目前广泛采用的几种无线传感器网络操作系统(WSNsOS)的主要特点,选取小内存、低功耗,且易于移植的Contiki操作系统,对Contiki的系统架构及代码架构进行了深入分析;研究了基于WSNs平台移植Contiki的通用方法,并以微型传感路由器(MSR)作为测试平台,进行了Contiki移植的仿真测试,验证方法的可行性,一定程度上解决了文章提出的问题。 相似文献
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基于CC2530的水产养殖监控系统的设计 总被引:1,自引:0,他引:1
为了解决传统水质监测方案中遇到的布线困难、成本高等问题,并能实现对水质环境因子的准确测量与控制,介绍了一种基于无线传感器网络的智能监控系统在水产养殖中的应用。选用集数据收发和数据处理于一体的低功耗芯片CC2530,设计了以CC2530为射频收发器的低功耗无线传感器网络节点,实现了对水产养殖水质参数的采集、处理和显示。在IAR开发环境下编写和编译传感器节点程序,实现了无线传感器网络节点之间的数据传输功能。结果表明:该系统各项技术性能指标达到设计要求,而且系统结构简单,数据传输速度快,功能易扩展,具有推广和应用价值。 相似文献
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覆盖控制是无线传感器网络中的基本问题之一,动态覆盖问题又在很多领域有其独到的应用价值。为了更好地实现动态覆盖,基于集中式Voronoi网格细分( CVT)理论,结合Lloyd算法,提出了一种无线传感器网络动态覆盖算法,通过调整目标覆盖区域几何边界,协同调度无线传感器网络节点,从而实现目标区域无线传感器网络动态覆盖。在仿真中,进行了正方形、正方形—圆形障碍静态边界区域覆盖实验和正方形—长方形目标区域、正方形—十字形目标区域、正方形—H形目标区域动态边界覆盖实验,验证了控制算法的有效性,并对不同目标覆盖区域形状、节点数量、覆盖程度、覆盖效率进行了分析。 相似文献