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2009 International Symposium on Autonomous Decentralized Systems最新文献

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A topology control algorithm for wireless sensor networks that considers overhearing 一种考虑监听的无线传感器网络拓扑控制算法
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207357
F. M. A. Silva, Ulisses Telemaco Neto
Topology control is one of the main techniques that can be used to decrease energy spenditure in wireless sensor networks. Although it has been the subject of much research, less attention has been devoted to study the effects of overhearing on topology control, i.e., the effects of the cost implied by nodes hearing transmissions even if these transmissions were not intended to them. In this paper we describe a distributed (localized) algorithm for topology control in wireless sensor networks. Our approach differs from previous work mainly in the sense that it takes the effects of overhearing into consideration and that it might eliminate more communication links from a given connectivity graph, and thus possibly assign lower transmission power to some nodes. This is done by eliminating so-called k-redundant edges, instead of eliminating only tworedundant edges. We present the sketch of the proof of properties of the algorithm and simulation results.
拓扑控制是减少无线传感器网络能量消耗的主要技术之一。虽然这已经成为很多研究的主题,但很少有人关注偷听对拓扑控制的影响,即节点听到传输所隐含的成本的影响,即使这些传输不是针对它们的。本文提出了一种用于无线传感器网络拓扑控制的分布式(局部化)算法。我们的方法与以前的工作不同,主要在于它考虑了偷听的影响,并且它可能会从给定的连接图中消除更多的通信链路,从而可能为某些节点分配更低的传输功率。这是通过消除所谓的k冗余边来实现的,而不是只消除两条冗余边。给出了算法性质证明的概要和仿真结果。
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引用次数: 3
Distributed Backup Scheme for Wireless Sensor Networks Using Delayed Report 基于延迟报告的无线传感器网络分布式备份方案
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207334
Taehee Kim, Hosung Park, Jeongcheol Lee, Min-Sook Jin, Sang-Ha Kim
In delay-tolerant wireless sensor networks, reporting data from a source node to a sink may be delayed to satisfy certain criterions, for example, high energy-efficiency, low algorithm complexity and so on. Sensed data in such networks accumulate on a sensor node during time delayed. It means that even a single failed node may cause a massive-data loss. This paper proposes a backup scheme to minimize data losses caused by failed nodes in wireless sensor networks using the delayed report. The proposed scheme can safely preserve data and consume less energy by backuping a single data to multiple nodes that exist in the one-hop distance from the source node. Multiple backup nodes do not only store and recover backup data but also distributedly report their backup data to the sink instead of the source node. As a result, the energy consumption for data report is not concentrated to the source node and is distributed to backup nodes. Such approach suggests the new potentiality of a backup scheme in error-scarce network.
在容延迟无线传感器网络中,为了满足高能效、低算法复杂度等要求,源节点向汇聚节点报告数据可能会出现延迟。在这种网络中,感知到的数据在时间延迟期间积累在传感器节点上。这意味着即使单个节点故障也可能导致大量数据丢失。本文提出了一种利用延迟报告最小化无线传感器网络中节点故障造成的数据丢失的备份方案。该方案通过将单个数据备份到距离源节点一跳距离内的多个节点,可以安全保存数据并减少能耗。多个备份节点不仅存储和恢复备份数据,而且还将各自的备份数据分布式上报到汇聚节点,而不是源节点。因此,数据报表的能耗没有集中到源节点,而是分散到备份节点。这种方法提示了差错稀缺网络中备份方案的新潜力。
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引用次数: 0
Geometric approaches for creating low power, low interference connectivity patterns in static, structureless sensor networks 在静态无结构传感器网络中创建低功耗、低干扰连接模式的几何方法
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207319
Vasilis Papadinas, Y. Stamatiou
The technological as well as software advances in microelectronics and embedded component design have led to the development of low cost, small-sized devices capable of forming wireless, ad-hoc networks and sensing a number of qualities of their environment, while performing computations that depend on the sensed qualities as well as information received by their peers. These sensor networks rely on the collective power of the separate devices as well as their computational and sensing capabilities to understand “global” environmental states through locally sampled information and local sensor interactions. Due to the locality of the sensor networks, that naturally arises due to the locality of their communications capabilities, a number of interesting connections exist between these networks and geometrical concepts and problems. In this paper we study two simple problems that pertain to the formation of low power and low interference communication patterns in fixed topology sensor networks. We study the problem of using multihop communication links instead of direct ones as well as the problem of forming a communication ring of sensor networks so as to reduce power consumption as well as interference from other nodes. Our focus is on the connection between sensor networks and geometrical concepts, rather than on practicality, so as to highlight their interrelationship.
微电子和嵌入式组件设计的技术和软件进步导致了低成本、小尺寸设备的发展,这些设备能够形成无线、自组织网络,并感知其环境的许多质量,同时根据感知的质量和同伴接收的信息执行计算。这些传感器网络依赖于单独设备的集体力量,以及它们的计算和传感能力,通过局部采样信息和局部传感器相互作用来理解“全局”环境状态。由于传感器网络的局部性,这自然是由于其通信能力的局部性而产生的,这些网络与几何概念和问题之间存在许多有趣的联系。本文研究了在固定拓扑传感器网络中形成低功耗低干扰通信模式的两个简单问题。我们研究了用多跳通信链路代替直接通信链路的问题,以及在传感器网络中形成一个通信环以降低功耗和其他节点的干扰的问题。我们的重点是传感器网络与几何概念之间的联系,而不是实用性,以突出它们之间的相互关系。
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引用次数: 1
FlexFS: Transparent resilience for GRID storage resources FlexFS: GRID存储资源的透明弹性
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207356
Konstantinos Tsakalozos, V. Kriakov, A. Delis
Existing GRID infrastructures rely on explicit user instructions in order to replicate files for the purposes of resiliency. This human-intensive process is inefficient, error prone and, more importantly, makes file replication in GRIDs a cumbersome task. To address this problem, we introduce FlexFS – a fully automated file-system framework that seamlessly plugs into existing GRID structures providing automated file replication and transparent-to-user resilience. FlexFS breaks apart files into blocks and injects resilient information into these blocks through the use of Forward Erasure Correction codes. FlexFS employs a number of methods that facilitate the automated storage and efficient retrieval of the blocks in order to provide I/O throughput similar to that of local hard disks, all in the face of ever-changing utilization and availability of the GRID resources. Compared to currently available GRID replication schemes, FlexFS attains 15% to 230% higher throughput, both for reading and writing files.
现有的GRID基础设施依赖于明确的用户指令来复制文件以实现弹性。这种人力密集的过程效率低下,容易出错,更重要的是,使网格中的文件复制成为一项繁琐的任务。为了解决这个问题,我们引入了FlexFS——一个完全自动化的文件系统框架,可以无缝地插入现有的GRID结构,提供自动文件复制和对用户透明的弹性。FlexFS将文件分解成块,并通过使用前向纠纠码将弹性信息注入这些块。为了提供与本地硬盘类似的I/O吞吐量,FlexFS采用了许多方法来促进块的自动存储和有效检索,所有这些都是在面对GRID资源不断变化的利用率和可用性的情况下实现的。与目前可用的GRID复制方案相比,无论是读写文件,FlexFS的吞吐量都提高了15%到230%。
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引用次数: 0
Estimation of user's position and behavior based on measurements of sensor information 基于传感器信息的测量来估计用户的位置和行为
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207381
K. Tsuji, E. Kamioka
In this paper, we propose a user's position and behavior estimation method using sensors, such as a GPS device, an acceleration sensor, and an ultrasonic sensor, to alert important information to the user at just the right time. For example, the information obtained by the acceleration sensor can be used to estimate the user's behaviors and the position on the rail track where the train is, and the data measured by the ultrasonic sensor tells the distance to the ceiling, that is to say, the user's location, such as indoor/outdoor, on the platform, in the station premise, on the train, and in the campus building, can be detected. The evaluation result based on the field experiment proves the effectiveness of the proposed method with the accuracy of more than 90%.
在本文中,我们提出了一种使用传感器的用户位置和行为估计方法,如GPS设备,加速度传感器和超声波传感器,在适当的时间向用户发出重要信息。例如,加速度传感器获得的信息可以用来估计用户的行为和火车所在轨道上的位置,超声波传感器测量的数据告诉到天花板的距离,也就是说,可以检测到用户的位置,例如室内/室外,在站台上,在车站,在火车上,在校园大楼内。基于现场试验的评价结果证明了该方法的有效性,准确率达到90%以上。
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引用次数: 1
Localized mechanism for continuous objects tracking and monitoring in wireless sensor networks 无线传感器网络中连续目标跟踪与监测的局部机制
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207343
Min-Sook Jin, Euisin Lee, Sang-Ha Kim, Fucai Yu, Soochang Park
This paper addresses issues for tracking and monitoring continuous objects, such as poison gas, biochemical, and chemical liquid in wireless sensor networks. These continuous objects are quite different from the individual objects, such as people, animals, and vehicles in that they are continuously distributed across a region and usually occupy a large area. Accordingly, they are detected and sensed by many sensor nodes, and their sensing data are redundant and highly correlated. Hence, there needs any efficient scheme on collecting and aggregating locally their sensing data and generating the data report. The continuous objects also tend to diffuse, changes in shape, increases the size, even splits into multiple smaller continuous objects, or join together one continuous object. Accordingly, there also need any efficient scheme to manage efficiently the dynamic change of shape of the continuous objects. Therefore, we introduce Dynamic Rectangle Zone-based Collaboration Mechanism for detecting, tracking, and monitoring the continuous objects taking into account the dynamic change of their shape. The proposed mechanism constructs a dynamic rectangle zone included the area occupied by one continuous object. One center node in the zone collects and aggregates the sensing data from sensor nodes which detect the continuous object. The dynamic rectangle zone change newly according to dynamic change of the continuous object and the center node is also altered by another node to minimize the energy consumption for collecting the sensing data. Through simulation results, we also evaluate how environmental factors and control parameters affect the performance of the proposed mechanism.
本文讨论了无线传感器网络中毒气、生化和化学液体等连续物体的跟踪和监测问题。这些连续的物体与个体物体(如人、动物和车辆)有很大的不同,因为它们连续地分布在一个地区,通常占据很大的面积。因此,它们被许多传感器节点检测和感知,它们的感知数据是冗余的和高度相关的。因此,需要一种有效的方案来本地收集和聚合它们的传感数据并生成数据报告。连续对象也倾向于扩散、改变形状、增大大小,甚至分裂成多个更小的连续对象,或者连在一起成为一个连续对象。因此,也需要任何有效的方案来有效地管理连续物体形状的动态变化。为此,我们引入基于动态矩形区域的协作机制,对考虑形状动态变化的连续物体进行检测、跟踪和监控。该机制构建了一个动态矩形区域,该区域包含一个连续物体所占据的区域。区域中的一个中心节点收集和聚合来自检测连续物体的传感器节点的传感数据。动态矩形区域会根据连续物体的动态变化而变化,中心节点也会被另一个节点改变,以最大限度地减少采集传感数据的能量消耗。通过仿真结果,我们还评估了环境因素和控制参数如何影响所提出机制的性能。
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引用次数: 2
Role Autonomous Decentralized System architecture towards system evolution 面向系统演化的角色自治分散系统架构
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207370
Yongdong Tan, Q. Qian, K. Mori
During the past two decades, Autonomous Decentralized System (ADS) has resolved on-line extensibility, on-line maintenance and fault-tolerance of system, and realized dynamic extension of system in node level and module level. However, with the developing of research on ADS, autonomously expression of system function is needed for achieving evolutional ability in function level.
在过去的二十年里,自治分散系统(ADS)解决了系统的在线扩展性、在线维护和容错问题,实现了系统在节点级和模块级的动态扩展。然而,随着ADS研究的不断深入,要实现功能层面的进化能力,需要系统功能的自主表达。
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引用次数: 6
Performance improvement of Hiroshima City Children Tracking System by correction of wrong registrations on school routes 通过纠正学校路线上的错误注册来改善广岛市儿童跟踪系统的性能
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207374
Y. Kakuda, T. Ohta, S. Inoue, Eitaro Kohno, Y. Akiyama
Recently, in Japan, crimes against children become atrocious and brutal. In some cases, children are attacked on the way to and back from school. Many technologies using ubiquitous networks have been developed to prevent crimes against children on their way to and back from school. Existing technologies, however, are not powerful to prevent crimes against children and helpful for parents since it is difficult to take information of children as a group. If the system can provide group information of children on the way to and back from school, it is easy for parents to know their safety level. This paper proposes a new technology for Children Tracking System based on mobile ad hoc networks and describes outline of Children Tracking System in Hiroshima City. The field experiments using the Children Tracking System have been performed and the effectiveness of the system is shown by data analysis for the experimental results.
最近,在日本,针对儿童的犯罪变得残暴和残忍。在某些情况下,孩子们在上学和放学的路上遭到袭击。许多利用无处不在的网络的技术已经被开发出来,以防止儿童在上学和放学的路上犯罪。但是,现有的技术很难将儿童的信息作为一个群体来获取,因此在防止针对儿童的犯罪和帮助家长方面还不够强大。如果该系统能够提供孩子们往返学校的群组信息,家长就很容易了解他们的安全水平。本文提出了一种基于移动自组织网络的儿童跟踪系统新技术,并介绍了广岛市儿童跟踪系统的概要。利用儿童跟踪系统进行了现场实验,对实验结果进行了数据分析,验证了系统的有效性。
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引用次数: 21
Evaluation on parallel downloading method using HTTP over UDP 基于UDP的HTTP并行下载方法的评估
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207382
J. Funasaka
(Parallel downloading) is one of the most effective technologies which speed up downloading large files on the Internet. As ubiquitous networks will be realized in the near future, downloading large files quickly is also very important on various types of networks. However, if we use the parallel downloading method on dynamic networks, such as ad hoc networks, it will not work well because of high loss rate and delay. To address this issue, we adopt UDP as a transport layer protocol instead of TCP which guarantees perfect in-order delivery unnecessary for file downloading. In our previous paper, a prototype of the parallel downloading method using HTTP over UDP is developed, and it is confirmed that our method outperforms the traditional method which adopts TCP, especially when loss rate is high and delay is large. In this paper, the key feature of the parallel downloading method using HTTP/UDP is evaluated through simple theoretical estimation and some simulation experiments. As a result, it is confirmed that the large division number tends to yield short download time. The proposed method can be an attractive protocol to distribute large files on dynamic networks composed of wireless links.
并行下载是一种最有效的技术,可以加快互联网上大文件的下载速度。随着无处不在的网络将在不久的将来实现,在各种类型的网络上快速下载大文件也非常重要。然而,如果在动态网络(如ad hoc网络)上使用并行下载方法,由于高丢失率和延迟,将无法很好地工作。为了解决这个问题,我们采用UDP作为传输层协议,而不是TCP,它保证了文件下载不必要的完美有序传输。在我们之前的文章中,我们开发了一种基于HTTP over UDP的并行下载方法的原型,并证实了我们的方法优于采用TCP的传统方法,特别是在丢包率高、延迟大的情况下。本文通过简单的理论估计和一些仿真实验,对基于HTTP/UDP的并行下载方法的主要特点进行了评估。结果表明,除法数越大,下载时间越短。该方法是一种在由无线链路组成的动态网络上分发大型文件的有吸引力的协议。
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引用次数: 1
Frequency-domain modeling and analysis of network reliability 网络可靠性的频域建模与分析
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207386
Long Zheng, Jian Li, Jing-lun Zhou, Yongqiang Zhang
Recently, computation, communication and control are deeply and pervasively embedded into physical and engineered components of network System, to advance entire networked system performance and dependability. In such systems, the growing complexity of network structure result in need of increasing system reliability. Network reliability modeling and analysis need not only capture the complex dynamic process of network systems, but also need the facilities for applying, understanding and computing. The objective of this paper is to develop a suitable modeling and analysis framework to study the ad-hoc network reliability. Using the mutual transformations of reliability functions between the time-domain and the frequency-domain, we adopt frequency-domain analysis approach to model network reliability. The advantages of the proposed approach over the traditional time-domain approaches include capability to capture higher order moments of system characteristics, scalability to analyze reliability of complex network systems, efficiency in calculation and practicability in computer simulation, etc. Finally, numerical experiment results show the feasibility and efficacy of this approach.
近年来,计算、通信和控制被广泛地嵌入到网络系统的物理和工程组件中,以提高整个网络系统的性能和可靠性。在此类系统中,随着网络结构的日益复杂,对系统可靠性的要求也越来越高。网络可靠性建模与分析不仅需要捕捉网络系统复杂的动态过程,而且需要具备应用、理解和计算的能力。本文的目标是建立一个合适的建模和分析框架来研究ad-hoc网络的可靠性。利用可靠性函数在时域和频域之间的相互转换,采用频域分析方法对网络可靠性进行建模。与传统的时域方法相比,该方法具有捕获系统特性高阶矩的能力、分析复杂网络系统可靠性的可扩展性、计算效率和计算机仿真实用性等优点。最后,通过数值实验验证了该方法的可行性和有效性。
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引用次数: 1
期刊
2009 International Symposium on Autonomous Decentralized Systems
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