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从传感器网络衍生出来的传感反应网络是一种全新的信息获取和处理技术.本文先简要介绍了传感反应网络体系结构和特点,再结合已有研究,在设计和开发传感反应网络协议方面,讨论传感节点-反应节点和反应节点-反应节点协调中存在的问题,并探讨反应节点给通信协议带来的问题与挑战. 相似文献
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Abbasi Ameer A. Younis Mohamed Akkaya Kemal 《Parallel and Distributed Systems, IEEE Transactions on》2009,20(9):1366-1379
Recent years have witnessed a growing interest in applications of wireless sensor and actor networks (WSANs). In these applications, a set of mobile actor nodes are deployed in addition to sensors in order to collect sensors' data and perform specific tasks in response to detected events/objects. In most scenarios, actors have to respond collectively, which requires interactor coordination. Therefore, maintaining a connected interactor network is critical to the effectiveness of WSANs. However, WSANs often operate unattended in harsh environments where actors can easily fail or get damaged. An actor failure may lead to partitioning the interactor network and thus hinder the fulfillment of the application requirements. In this paper, we present DARA, a Distributed Actor Recovery Algorithm, which opts to efficiently restore the connectivity of the interactor network that has been affected by the failure of an actor. Two variants of the algorithm are developed to address 1- and 2-connectivity requirements. The idea is to identify the least set of actors that should be repositioned in order to reestablish a particular level of connectivity. DARA strives to localize the scope of the recovery process and minimize the movement overhead imposed on the involved actors. The effectiveness of DARA is validated through simulation experiments. 相似文献
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无线传感器网络中的地址分配协议 总被引:1,自引:0,他引:1
地址用来标识节点,使能网络通信协议,在无线传感器网络中扮演重要角色.由于无线传感器网络中节点众多,再考虑其网络动态性,手动地为每个节点分配地址是一件繁琐甚至无法完成的工作,于是,地址分配协议成为必需.由于无线传感器网络自身所具有的特点,传统的DHCP协议和ad hoc网络的地址分配协议对其不再适用.分析了无线传感器网络地址分配协议的必要性,总结了地址分配协议需要解决的问题和所面临的挑战,并对已有地址分配协议进行了分类.介绍和比较了当前有代表性的地址分配协议,并指出了它们的问题,分析了地址分配协议下一步研究的重点. 相似文献
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无线传感器网络MAC协议研究进展 总被引:14,自引:3,他引:14
近年来, 无线传感器网络 (WSNs) 作为国内外一个新兴的研究方向, 吸引了许多研究者和机构的广泛关注. 无线传感器网络具有与传统无线网络不同的特点, 且与应用高度相关. 无线传感器网络主要的一个设计目标是有效地使用网络节点的受限资源 (能量、内存和计算能力), 以最大化网络的服务寿命. 传统网络的介质访问控制 (MAC) 协议, 并不能直接应用于无线传感器网络. 针对无线传感器网络的特点和应用背景, 研究人员提出了很多 MAC 协议. 本文通过分析无线传感器网络的特点, 讨论了影响 MAC 协议设计的有关问题, 着重研究和比较了当前一些重要的无线传感器网络 MAC 协议. 结果表明, 不存在一种适用于无线传感器网络应用的标准 MAC 协议, 好的 MAC 协议必须能在能量有效性和网络性能之间进行折中. 最后, 展望了无线传感器网络 MAC 协议的进一步研究策略和发展趋势. 相似文献
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无线传感器网络路由协议研究 总被引:1,自引:0,他引:1
路由协议提供了从源节点到目的节点的优化路径,在无线传感器网络体系结构中至关重要。本文首先针对无线传感器网络的特点,提出了在路由协议的设计过程中需要重点考虑的性能指标,然后分析了一些当前典型的路由协议,并从拓扑结构、通信模式、路由开销等方面对这些协议进行了比较,最后结合该领域当前的研究现状指出了未来的研究趋势。 相似文献
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无线传感器网络路由协议研究综述 总被引:3,自引:0,他引:3
无线传感器网络是一种新的计算模式,它对网络的路由协议提出了许多新挑战。首先简要介绍无线传感器网络的体系结构和性能标准,然后着重从路由协议方面比较分析无线传感器网络中多种典型的路由协议,指出了各自的特色,最后总结出未来的研究热点和发展趋势。 相似文献
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无线传感器网络MAC协议研究进展 总被引:9,自引:0,他引:9
在无线传感器网络体系结构中,MAC(medium access control)协议是保证网络高效通信的重要协议.无线传感器网络有着与传统无线网络明显不同的性能特点和技术要求,传统无线网络MAC协议无法应用于传感器网络,各种针对特定传感器网络特点的MAC协议相继提出.归纳无线传感器网络MAC协议的设计原则和分类方法,分析当前典型的各类MAC协议的主要机制,详细比较这些协议的特点、性能差异和应用范围.最后总结无线传感器网络MAC协议的研究现状,指出未来的研究重点. 相似文献
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In this paper, we propose a mathematical task dispatching model to reduce the total tasks completion time, i.e. make-span, in Wireless Sensor Actor
Networks (WSANs). The proposed approach minimizes the completion time of tasks that have been allocated to actors but have not yet been dispatched to
actors for execution in the networks. We calculate the best rate of dispatching of tasks by the network sink to allocated actors through a steady state analysis
of our proposed model to solve equations and inequalities. It is shown that this dispatching rate improves the network lifetime too. Experimental results
with a prototyped simulation of the proposed approach show shorter make-span and longer network lifetime compared to when one of the three famous
task allocation algorithms, namely, the min-min, opportunistic load balancing (OLB), and stochastic allocation algorithms, is used. 相似文献
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Xiaoyuan Luo Liu Feng Jing Yan Xinping Guan 《IEEE/CAA Journal of Automatica Sinica》2015,2(3):274-281
This paper studies the problem of dynamic coverage with wireless sensor and actor networks (WSANs) in underwater environment. Different from most existing works, the WSANs consist of two kinds of nodes, i.e., sensor nodes (SNs) which cannot move autonomously and actor nodes (ANs) which can move autonomously according to the performance requirement. The problem of how to coordinate two kinds of nodes to facilitate dynamic coverage in underwater environment is challenging due to their heterogeneous capabilities. To reduce redundancy of communication links and improve connectivity between ANs and SNs in underwater WSANs, a min-weighted rigid graph based topology optimization scheme is first developed, such that the underwater communication energy consumption can be saved. With the optimized topology, a dynamic coverage strategy is proposed to improve the coverage among SNs and ANs for underwater WSAN where underwater fluid motions are considered. Furthermore, it is proved that the network coverage area is connected by using the min-weighted rigid graph. Finally, simulation results are presented to show the effectiveness of the main results. 相似文献
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无线传感器网络因其巨大的应用前景而日益受到学术界和工业界的广泛关注,而其路由协议更是国内外学者研究的热点。对现存的无线传感器网络路由协议进行了分类、并研究和对比分析了各类路由协议的核心路由机制,最后总结出无线传感器网络路由协议的研究热点和发展趋势。 相似文献