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1.
无线传感网发展综述   总被引:7,自引:0,他引:7  
针对日益发展的无线传感网络进行了综合研究,介绍了无线传感网络的整体体系结构和节点形式,并对传感网耗能特点及关键技术作了重点介绍,同时对其广泛的应用前景及研究热点问题做了描述.  相似文献   

2.
文章针对日益发展的无线传感网络进行了综合研究,介绍了无线传感网络的整体体系结构和节点形式,并对传感网络协议及关键技术作了重点介绍,同时对其广泛的应用前景及研究热点问题做了描述。  相似文献   

3.
作为一种全新的信息处理、采集、感知技术,智能无线传感器网络具有灵活性强、维护成本低、检测精度高、容错度高、处理信息量大等诸多优势.近年来,我国科学技术水平的不断进步,使得智能无线传感网络越来越成熟,并开始被越来越多地应用于我国社会各生产领域中.本文针对智能无线传感网络进行简要介绍,分析了其关键技术,并对智能无线传感网络的实际应用进行了探讨.  相似文献   

4.
无线传感网络路由协议现状研究   总被引:4,自引:2,他引:2  
雷阳  尚凤军  任宇森 《通信技术》2009,42(3):117-120
文中介绍了无线传感网络与传统无线网络的差异,从设计传感网络路由的基本思路和传感网络路由安全问题两个方面对传感网络路由算法进行了研究。概括了传感网络路由协议的目前研究的现状,分析了无线传感网络路由算法常见的安全攻击,在此基础上给出了相应攻击可能会影响到的经典传感网络路由协议,最后对无线传感网络路由算法的发展现状进行了总结,对无线传感网络路由算法的发展方向做了展望。  相似文献   

5.
能耗是无线传感网络研究的核心问题,也是其网络性能重要参数之一.WSNs节点的生存周期主要取决于节点的能量消耗,针对无线传感网络WSNs低速率的特点,本文对其网络节点能耗做了分析研究,讨论无线传感网络MAC层的能耗管理与节能措施,从周期性监听和睡眠,冲突和串音避免,长信息传递等方面介绍与分析了S-MAC协议在WSNs中节能的合理性与实用性.  相似文献   

6.
彭柳  方彦军 《通信技术》2008,41(2):108-110
文章对无线传感网络在机器人设计中的应用进行了研究,提出了一种基于Ad hoc网络的分布式无线令牌环协议的机器人通信系统实现方案,分析了其在机器人通信系统应用中的可行性.文中给出了基于无线传感网络的机器人通信系统的软硬件设计方案,并对其在移动机器人通信系统中的应用问题进行了探讨,最终提出了无线传感器网络应用于移动机器人通信系统的实现方法.  相似文献   

7.
王娟 《信息通信》2014,(10):121-122
一般情况下,为了有效地提升无线传感网络的节点能量,就需要将无线传感网络利用拓扑结构分为多个层级进行控制,选择簇头负责发挥路由的功能,在这样的操作方式下,就可以有效地保证无线传感网络的节点能量的正常保护,进而有效地保证无线传感网络的有效存在。针对这样的情况,文章将重点介绍根据引进low energy adaptive clustering hierarchy算法和混合能量高效分布式分簇算法的无线传感网络层次型拓扑控制的具体应用,通过对无线传感网络层次型拓扑控制的应用,可以有效地实现对无线传感网络资源的合理分配。  相似文献   

8.
随着信息技术的不断发展,无线传感网络的应用范围不断扩大。无线传感网络中的节点存在一定的能量约束,如何降低网络运行能耗,延长网络有效使用时间成为一项研究课题。本文给出了一种无线传感网络路由算法,构建了无线传感网络的应用模型,对节点的能耗进行了分析,给出了基于簇头的信息路由策略,并对簇头的动态更新理念进行了描述。本文方法丰富了无线传感网络路由研究,具有一定的参考价值与借鉴意义。  相似文献   

9.
无线传感器网络新型MAC协议研究   总被引:3,自引:3,他引:0  
无线传感网络集成了传感器技术、计算技术和通信技术,它能实时检测、感知和采集网络分布区域内的各种监测对象的信息,具有极为广阔的应用和发展前景.丈章介绍了一种无线传感网络的新的MAc层协议-EZMac协议,并提出了一种基于EZMac协议的无线传感器网络节点的设计方案.  相似文献   

10.
正1.引言无线传感网络的广泛应用背景,更需要开展对其通信性能等理论研究工作,尤其在航空、军事、生产控制等方面,不容有半点失误,因此,如何保障传感器网络之间的性能安全可靠、稳定,以及动态自调整等是关键问题,但目前在无线传感网络领域尚缺仿真方面的理论研究。本文认为能实现对无线传感网络的通信模拟,可以避免无线传感网络通信应用后工作效率不高、预估各种问题、以及问题出现后的解决方案等。2.无线传感网络通信的修正仿真算法  相似文献   

11.
A survey on sensor networks   总被引:103,自引:0,他引:103  
The advancement in wireless communications and electronics has enabled the development of low-cost sensor networks. The sensor networks can be used for various application areas (e.g., health, military, home). For different application areas, there are different technical issues that researchers are currently resolving. The current state of the art of sensor networks is captured in this article, where solutions are discussed under their related protocol stack layer sections. This article also points out the open research issues and intends to spark new interests and developments in this field.  相似文献   

12.
无线传感器网络(Wireless Sensor Networks,简称WSNs)作为一种新的获取信息的方式和处理模式,已成为通信领域的研究重点。而路由协议则是无线传感器网络当前的热点研究之一。目前,针对较为典型的分簇式路由协议LEACH路由协议的研究,是无线传感器网络目前研究的一个热点。介绍了无线传感器网络路由协议常见的攻击类型,并从路由安全的角度建议性的提出了一种对LEACH路由协议针对安全性的改进方案,并应用NS2仿真平台,对改进协议做了仿真并进行了性能分析。  相似文献   

13.
在水下无线传感器网络中,MAC (Medium Access Control)协议为相互竞争的用户之间公平地分配信道资源.介绍了水声通信的特点以及在此环境下设计MAC协议所面临的主要问题,归纳水下无线传感器网络MAC协议的设计原则和分类方法.通过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...  相似文献   

14.
MAC protocols for wireless sensor networks: a survey   总被引:25,自引:0,他引:25  
Wireless sensor networks are appealing to researchers due to their wide range of application potential in areas such as target detection and tracking, environmental monitoring, industrial process monitoring, and tactical systems. However, low sensing ranges result in dense networks and thus it becomes necessary to achieve an efficient medium-access protocol subject to power constraints. Various medium-access control (MAC) protocols with different objectives have been proposed for wireless sensor networks. In this article, we first outline the sensor network properties that are crucial for the design of MAC layer protocols. Then, we describe several MAC protocols proposed for sensor networks, emphasizing their strengths and weaknesses. Finally, we point out open research issues with regard to MAC layer design.  相似文献   

15.
In 2002, two spaceborne microwave radiometers were launched to provide new observation data. One sensor is the Advanced Microwave Scanning Radiometer (AMSR), aboard the Advanced Earth Observing Satellite-II (ADEOS-II) of the National Space Development Agency of Japan (NASDA). The other is AMSR-E, aboard Aqua of the National Aeronautics and Space Administration (NASA). AMSR and AMSR-E are almost identical sensors, and have lower frequencies 6 and 10 GHz, in comparison with preceding sensors, such as the Special Sensor Microwave/Imager (SSM/I). In addition to geophysical products currently retrieved from the SSM/I, new products of sea surface temperature and soil moisture have been retrieved from AMSR and AMSR-E by using those lower frequencies. Eleven Principal Investigators were assigned by NASDA to develop algorithms to retrieve geophysical products, and their programs have been installed at the Earth Observation Research Center of NASDA. Geophysical products are currently being validated by several methods, such as using existing in situ data, employing instruments in field observations, and comparing data with other sensor's data.  相似文献   

16.
无线传感器网络基于参数可调增强型覆盖控制算法   总被引:1,自引:0,他引:1       下载免费PDF全文
覆盖问题是无线传感器网络领域的一个基本问题,也是无线传感器网络特性当中的一个重点问题.如何通过某种算法达到以最少传感器节点对监测区域的有效覆盖已成为目前研究的一项重要课题.因此,提出一种增强型覆盖控制算法(Enhanced Coverage Control Algorithm, ECCA).该算法通过概率理论知识可以有效地求解出对监测区域进行有效覆盖下的最少节点,给出了传感器节点概率的期望值计算方法以及目标节点首次被传感器节点覆盖和多次覆盖后的期望值求解过程,验证随机变量相互之间不独立时的比例函数关系.仿真结果表明,ECCA算法可以使用较少的传感器节点数量完成对监测区域的有效覆盖,提高了对监测区域的覆盖质量.  相似文献   

17.
Many methods can sense and respond to chemical agent release. We evaluate current and near-term sensor options for detecting the most likely threats, currently sarin, cyanide, and pesticides. We also identify sensor technologies that may be capable of responding to additional chemical threats and biological agents and provide options for coping with new threats as they develop. We collate previous research results on background contaminants that have the potential of introducing unwanted false alarms in chemical agent detection systems and suggest techniques that may be capable of reducing the impact of releases of toxic materials.  相似文献   

18.
In this paper we present PEAS, a randomized energy-conservation protocol that seeks to build resilient sensor networks in the presence of frequent, unexpected node failures. PEAS extends the network lifetime by maintaining a necessary set of working nodes and turning off redundant ones, which wake up after randomized sleeping times and replace failed ones when needed. The fully localized operations of PEAS are based on each individual node's observation of its local environment but do not require per neighbor state at any node; this allows PEAS to scale to very dense node deployment. PEAS is highly robust against node failures due to its simple operations and randomized design; it also ensures asymptotic connectivity. Our simulations and analysis show that PEAS can maintain an adequate working node density in presence of as high as 38% node failures, and a roughly constant overhead of less than 1% of the total energy consumption under various deployment densities. It extends a sensor network's functioning time in linear proportional to the deployed sensor population. Fan Ye received his B.E. in Automatic Control in 1996 and M.S. in Computer Science in 1999, both from Tsinghua University, Beijing, China. He received his Ph.D. in Computer Science in 2004 from UCLA. He is currently with IBM Research. His research interests are in wireless networks, sensor networks and security. Honghai Zhang received his BS in Computer Science in 1998 from University of Science and Technology of China. He received his MS and Ph.D. in Computer Science from University of Illinois at Urbana-Champaign. He is currently with the Wireless Advanced Technology Lab of Lucent Technologies. His research interests are wireless networks, WiMAX, and VoIP over wireless networks. Songwu Lu received both his M.S. and Ph.D. from University of Illinois at Urbana-Champaign. He is currently an associate professor at UCLA Computer Science. He received NSF CAREER award in 2001. His research interests include wireless networking, mobile computing, wireless security, and computer networks. Lixia Zhang received her Ph.D in computer science from the Massachusetts Institute of Technology. She was a member of the research staff at the Xerox Palo Alto Research Center before joining the faculty of UCLA’s Computer Science Department in 1995. In the past she has served on the Internet Architecture Board, Co-Chair of IEEE Communication Society Internet Technical Committee, the editorial board for the IEEE/ACM Transactions on Networking, and technical program committees for many networking-related conferences including SIGCOMM and INFOCOM. Zhang is currently serving as the vice chair of ACM SIGCOMM. Jennifer C. Hou received the Ph.D. degree in Electrical Engineering and Computer Science from The University of Michigan, Ann Arbor in 1993 and is currently a professor in the Department of Computer Science at University of Illinois at Urbana Champaign (UIUC). Prior to joining UIUC, she has taught at Ohio State University and University of Wisconsin - Madison. Dr. Hou has worked in the the areas of network modeling and simualtion, wireless-enabled software infrastructure for assisted living, and capacity optimization in wireless networks. She was a recipient of an ACM Recognition of Service, a Cisco University Research Award, a Lumley Research Award from Ohio State University, and a NSF CAREER award. *A Shorter version of this paper appeared in ICDCS 2003.  相似文献   

19.
振弦式传感器是一种使用相当广泛的称重测力传感器。称重测力传感器主要分为应变力传感器,石英谱振器,振弦式传感器等几大类。就其工作原理而言,振弦式传感器是目前在称重测力应用方面最为先进的一种测力传感器。文章主要从理论上对振弦式传感器的激励响应信号进行分析,确定出稳定可靠的激励响应信号区间,并在该区间内分析计数法和多周期测量法的误差,比较得出多周期测量法测量频率精度高,稳定性好,抗干扰能力好。  相似文献   

20.
In the last decade, the seminal term and concept of "m-health" were first defined and introduced in this transactions as "mobile computing, medical sensor, and communications technologies for healthcare." Since that special section, the m-health concept has become one of the key technological domains that reflected the key advances in remote healthcare and e-health systems. The m-health is currently bringing together major academic research and industry disciplines worldwide to achieve innovative solutions in the areas of healthcare delivery and technology sectors. From the wireless communications perspective, the current decade is expected to bring the introduction of new wireless standards and network systems with true mobile broadband and fast internet access healthcare services. These will be developed around what is currently called the fourth-generation (4G) mobile communication systems. In this editorial paper, we will introduce the new and novel concept of 4G health that represents the long-term evolution of m-health since the introduction of the concept in 2004. The special section also presents a snapshot of the recent advances in these areas and addresses some of the challenges and future implementation issues from the evolved m-health perspective. It will also present some of the concepts that can go beyond the traditional "m-health ecosystem" of the existing systems. The contributions presented in this special section represent some of these developments and illustrate the multidisciplinary nature of this important and emerging healthcare delivery concept.  相似文献   

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