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Autonomous Mobile Agent Coordination Technology for high quality alternative servies provision 面向高质量替代服务提供的自主移动代理协调技术
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207369
Yohei Kotake, S. Kimura, Xiaodong Lu, K. Mori
Due to the advancement of information technology, the business strategy is changing for a modern online environment. For centralized data consistency management, the conventional database systems can't satisfy timeliness and nostop service requirement under dynamically changing environment. Autonomous Decentralized Database System is proposed to meet these requirements. In ADDS, each site holds Allowable Volume(AV) in which each site can have local updates autonomously without communicating with any master site. And background coordination technology for autonomous adjustment of AV among the sites enables flexible provision of services. In the circumstance that AV is not enough in the system, however, the background coordination technology is not enough. In the system supporting multiple alternative services, AV shortage also allows both increase of the timeliness and decrease of the satisfaction. The satisfaction requirement means that each site offers products of user's desire to as many users as possible. To solve these problems, Autonomous Mobile Agent Coordination Technology is proposed. The technology is composed of two sub technologies. In Autonomous Relocation Technology, MA autonomously detects AV shortage thorough sites and distributes AV among sites. Autonomous Guarantee Technology makes MA assure satisfaction in adjusting alternative services reserved among sites by coordination with sites. The effectiveness of proposed technology is proved by simulation that both timeliness and satisfaction are improved.
由于信息技术的进步,商业策略正在为现代网络环境而改变。对于集中的数据一致性管理,传统的数据库系统无法满足动态变化环境下的时效性和不间断服务需求。自治分散数据库系统就是为了满足这些需求而提出的。在add中,每个站点持有允许量(AV),其中每个站点可以自主地进行本地更新,而无需与任何主站点通信。后台协调技术可自动调整各网站间的AV,从而提供灵活的服务。然而,在系统AV不够的情况下,后台协调技术是不够的。在支持多种替代服务的系统中,AV短缺也会增加时效性和降低满意度。满意度要求是指每个站点向尽可能多的用户提供用户想要的产品。针对这些问题,提出了自主移动代理协调技术。该技术由两个子技术组成。在自主搬迁技术中,蚁群算法在整个站点中自动检测AV短缺,并将AV分配到各个站点。自主保证技术通过与站点之间的协调,使MA在调整站点间保留的备选服务时保证满意。通过仿真验证了该技术的有效性,提高了用户的及时性和满意度。
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引用次数: 0
Simple decentralized autonomous adaptive nonlinear real-time controller with controller source code optimization: Case study 简单的分散自治自适应非线性实时控制器与控制器的源代码优化:案例研究
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207337
K. Perutka, Petr Dostálek
The paper deals with the combination of several approaches of the feedback control applied on the laboratory apparatus in real-time. Each of these approaches is generally known, but their consolidated implementation into one control algorithm is new. The control program was written in MATLAB with Real-time toolbox and realized in PC with the technological card connected to the laboratory apparatus. Due to the fact the control system has multiple inputs and multiple outputs the decentralized autonomous controller was used. Many systems are biased in practice therefore the self-tuning control strategy was added into the used control algorithm. Furthermore, the method of simple nonlinear controller enlarges the area of usage of the used approach. It is common that the controlled process is needed to be controlled in real-time in practice. In that purpose, the Real-time toolbox was used. Finally, the not so commonly used techniques of time optimization of source code in MATLAB was used to run the program faster, such as cycle masking, or minimization of commands in the main cycle.
本文讨论了几种反馈控制方法的组合在实验室设备实时控制中的应用。这些方法都是众所周知的,但将它们整合到一个控制算法中是新的。在MATLAB中使用实时工具箱编写控制程序,在PC上通过工艺卡与实验设备连接实现。由于控制系统具有多输入多输出的特点,采用了分散自治控制器。在实际应用中,许多系统存在偏差,因此在控制算法中加入了自整定控制策略。此外,简单非线性控制器的方法扩大了所使用方法的使用范围。在实际应用中,需要对被控过程进行实时控制是很常见的。为此,使用了Real-time工具箱。最后,利用MATLAB中不太常用的源代码时间优化技术,如周期掩蔽,或最小化主周期中的命令,来加快程序的运行速度。
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引用次数: 2
Autonomous assurance technology for service continuity in demand-oriented information system 面向需求信息系统服务连续性的自主保障技术
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207362
T. Tsuda, H. Khandan, H. Nishimura, Xiaodong Lu, K. Mori
In the progress of computing and network technologies, the amount of information in demand-oriented information services is being increased. Therefore, it is required to reduce the size of data and to provide continuous services. Additionally, users have heterogeneous service level requirements, but it is difficult for conventional centralized information system to meet the above needs simultaneously. Autonomous Decentralized Information System (ADIS) is proposed to achieve these requirements. In this system, the layered data is employed and each data is distributed on different levels. Therefore, the system can provide service with adaptability and minimum total storage volume. In this paper, ADIS is implemented as streaming video service and to satisfy the heterogeneous quality requirements, high and low service levels are shown for simplicity. As for the high service levels, the redundant hot-standby node mechanism is utilized, however, this is not provided for low service level because it may cause congestion in the whole system. To achieve continuous service for low service level without decreasing high's service level, the reservation backup approach is utilized. This is used for multiple users per slot to increase service continuity. Additionally, it is required to reserve nodes that are vacant within minimum steps as quick as possible. However, there is a trade-off between the node's congestion and the search area. To solve above problems, the autonomous assurance technology is proposed. In this technology, a mobile agent decides the scope of the search, concerning the congestion in the local area. Moreover, in the failure of a node, the recovery process will proceed automatically. The effectiveness of this technology is proved through implementation of practical streaming system.
随着计算机技术和网络技术的发展,以需求为导向的信息服务的信息量不断增加。因此,需要减少数据的大小,并提供连续的服务。此外,用户对服务水平的需求是异构的,而传统的集中式信息系统难以同时满足上述需求。自治分散信息系统(ADIS)就是为了满足这些需求而提出的。该系统采用分层数据,每个数据都分布在不同的层次上。因此,系统可以提供适应性强、总存储容量最小的业务。本文将ADIS作为流媒体视频服务来实现,为了满足异构的质量要求,为了简单,划分了不同的服务等级。对于高服务水平,采用冗余热备节点机制;对于低服务水平,不采用冗余热备机制,可能导致整个系统拥塞。为了在不降低高服务水平的情况下实现低服务水平的连续服务,采用了预约备份的方法。这用于每个槽位的多个用户,以增加业务的连续性。此外,需要在最短的步骤内尽可能快地保留空闲节点。然而,在节点拥塞和搜索区域之间存在权衡。针对上述问题,提出了自主保障技术。在该技术中,移动代理根据局部区域的拥塞情况决定搜索范围。此外,当节点发生故障时,恢复过程将自动进行。通过实际流系统的实现,证明了该技术的有效性。
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引用次数: 0
Autonomous decentralized train control technology 自主分散列车控制技术
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207322
M. Matsumoto, Naohisa Kitamura
In the conventional automatic train control (ATC) system, the central ATC logic device calculates permitted speed of each blocking section and controls speed of all trains. On the other hand, in the new digital ATC (D-ATC) system, the central logic device calculates each position to which a train can move safely, and sends the information on positions to all trains. On each train, the on-board equipment autonomously calculates an appropriate braking pattern with the information, and controls velocity of the train. These special features realize ideal speed control and also allow high-density train operations.
在传统的列车自动控制系统中,中央列车自动控制逻辑装置计算各阻塞路段的允许速度并控制所有列车的速度。另一方面,在新的数字ATC (D-ATC)系统中,中央逻辑装置计算列车可以安全行驶的每个位置,并将位置信息发送给所有列车。在每列列车上,车载设备根据这些信息自动计算出合适的制动模式,并控制列车的速度。这些特殊的功能实现了理想的速度控制,也允许高密度的列车运行。
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引用次数: 4
AFDX based avionic data bus architecture design and analysis 基于AFDX的航空电子数据总线体系结构设计与分析
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207389
Jian Li, Long Zheng, Jianguo Yao
The communication between various on-board systems is paramount important for the concept of fly-by-wire, the issues of safety-critical applications, component interaction, which is on the forefront of modern airborne applications. Avionics Full Duplex Switched Ethernet (AFDX) responses this challenge as a bus standard based on the Ethernet protocol and has gained recognition and widespread uses in large commercial aircraft. AFDX addresses quality of service, determinism, and reliability required in an aircraft environment, and at the same time provides the advantages in wiring bundles and the communication bandwidth, increasing network capability, and supporting deterministic requirement of the airborne system and certification guidelines system. AFDX is an implementation of the ARINC 664 Part 7 standard, which uses Ethernet hardware media, but the protocol is fundamentally different from the IEEE802.3 Ethernet in that it provides reliable time determinism, bounded latency, guaranteed bandwidth, and fault tolerance suitable for flight safety-critical applications.
各种机载系统之间的通信对于电传飞行概念、安全关键应用问题、组件交互至关重要,是现代机载应用的前沿。航空电子全双工交换以太网(AFDX)作为一种基于以太网协议的总线标准应对了这一挑战,并在大型商用飞机上得到了认可和广泛应用。AFDX解决了飞机环境中所需的服务质量、确定性和可靠性,同时在布线束和通信带宽方面提供了优势,增加了网络能力,并支持机载系统和认证指南系统的确定性要求。AFDX是ARINC 664 Part 7标准的实现,它使用以太网硬件介质,但该协议与IEEE802.3以太网有根本不同,因为它提供可靠的时间确定性、有限延迟、有保证的带宽和容错性,适用于飞行安全关键应用。
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引用次数: 7
MinPSL: A high-performance scheduling protocol based on intelligent global message reordering in WDM star networks MinPSL: WDM星型网络中一种基于智能全局消息重排序的高性能调度协议
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207392
P. A. Tsimoulas, G. Papadimitriou, A. Pomportsis
Several well-known scheduling schemes like EATS and MSL seem to suffer notable performance degradation under the realistic conditions of non-uniform destinations and non-negligible transceiver tuning latencies that apply in practical WDM star networks. Our EMPS protocol has been shown to noticeably increase the performance of practical networks of this kind. Nonetheless, EMPS tries to balance the offered load by only considering the heads of the message queues maintained by the source nodes; therefore, its performance is degraded, especially for medium to high offered loads and for rather slowly tunable transceivers. In this article we propose the Minimization of Probability and Size of scheduling Latency (MinPSL) protocol, which examines each source node's message queue at a certain depth and reorders messages intelligently on the basis of receiver availability. MinPSL perfectly minimizes the probability of having to schedule two or more messages intended for the same destination simultaneously or at close times. The proposed scheme also minimizes the actual performance penalty incurred, when scheduling of consecutive messages with the same destination cannot be avoided. Extensive simulations are carried out in order to study the performance of MinPSL and compare it to EMPS under various conditions. The simulation results ascertain the fact that MinPSL always brings about a considerable performance improvement.
一些著名的调度方案,如EATS和MSL,在实际WDM星形网络中应用的非均匀目的地和不可忽略的收发器调优延迟的现实条件下,似乎会遭受明显的性能下降。我们的EMPS协议已被证明可以显著提高这类实际网络的性能。尽管如此,EMPS试图通过只考虑源节点维护的消息队列的头部来平衡提供的负载;因此,它的性能下降,特别是对于中等到高提供负载和相当缓慢可调的收发器。在本文中,我们提出了最小化调度延迟(MinPSL)协议,该协议在一定深度检查每个源节点的消息队列,并根据接收方的可用性智能地重新排序消息。MinPSL完美地减少了必须同时或在关闭时间调度用于同一目的地的两条或多条消息的可能性。当无法避免对具有相同目的地的连续消息进行调度时,所提出的方案还最大限度地减少了实际的性能损失。为了研究MinPSL在各种条件下的性能并与EMPS进行比较,进行了大量的仿真。仿真结果表明,MinPSL总能带来相当大的性能提升。
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引用次数: 0
Security analysis survey and framework design for IP connected LoWPANs IP连接lowpan的安全性分析调查与框架设计
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207373
R. Riaz, Ki-Hyung Kim, H. Ahmed
IEEE 802.15.4 standard for Low Power Wireless Personal Area Networks (LoWPANs) is emerging as a promising technology to bring envisioned ubiquitous paragon, into realization. Considerable efforts are being carried on to integrate LoWPANs with other wired and wireless IP networks, in order to make use of pervasive nature and existing infrastructure associated with IP technologies. Designing a security solution becomes a challenging task as this involves threats from wireless domain of resource constrained devices as well as from extremely mature IP domain. In this paper we have i) identified security threats and requirements for LoWPANs ii) analyzed current security solutions and identified their shortcomings, iii) proposed a generic security framework that can be modified according to application requirements to provide desired level of security. We have also given example implementation scenario of our proposed framework for resource and security critical applications.
IEEE 802.15.4低功耗无线个人区域网络(lowpan)标准正在成为一项有前途的技术,将设想的无处不在的典范变为现实。目前正在作出相当大的努力,将低局域网与其他有线和无线IP网络结合起来,以便利用与IP技术有关的普遍性质和现有基础设施。设计安全解决方案是一项具有挑战性的任务,因为这涉及到来自资源受限设备的无线领域以及极其成熟的IP领域的威胁。在本文中,我们i)确定了lowpan的安全威胁和需求ii)分析了当前的安全解决方案并确定了它们的缺点iii)提出了一个通用的安全框架,该框架可以根据应用需求进行修改,以提供所需的安全级别。我们还为资源和安全关键型应用程序提供了我们提出的框架的示例实现场景。
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引用次数: 47
Supporting independent development, deployment and co-operation of autonomous objects in distributed control systems 支持分布式控制系统中自主对象的独立开发、部署和合作
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207361
J. Kaiser, S. Zug, M. Schulze, L. Becker
Autonomous, active components like smart sensors and actuators offer the capabilities of spontaneous behaviour, concurrent computations and well-defined communication interfaces. The perspective of building a system from such active blocks however has an impact on modeling and deployment of the components and supporting their interaction at run-time. The paper presents a modeling approach for dynamically interacting autonomous objects addressing the problems of independent development, deployment and incremental extension. Compared to related approaches our concept further complements the modeling by an adequate middleware that supports the abstractions of the model during run-time and performs the respective dynamic binding and co-operation between objects. This opens a wide range of possibilities for dynamically integrating hardware and software components and support virtual sensors and actuators.
智能传感器和执行器等自主、主动组件提供自发行为、并发计算和定义良好的通信接口的能力。然而,从这些活动块构建系统的观点对组件的建模和部署以及在运行时支持它们的交互有影响。提出了一种动态交互自治对象的建模方法,解决了自主开发、部署和增量扩展问题。与相关方法相比,我们的概念通过一个适当的中间件进一步补充了建模,该中间件在运行时支持模型的抽象,并在对象之间执行相应的动态绑定和合作。这为动态集成硬件和软件组件以及支持虚拟传感器和执行器提供了广泛的可能性。
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引用次数: 2
Review of modern regional innovation measurement tools and proposal of a business excellence barometer — implementation and conclusions for the Region of Western Greece 回顾现代区域创新测量工具和商业卓越晴雨表的建议-西希腊地区的实施和结论
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207321
A. Balatsas, P. Kyratsis, Vasileios Mavroeidis
The creation of innovation in Europe is a key issue for the development of a competitive economy in a globalized business world. Apart from creating innovation, a systematic way for its measurement is needed, in order to set strategies and policies at both European and national levels. The present research reviews the existing innovation measurement indicator methodologies, used by the European Union, in order to determine best practices and encourage enterprises to use them. A critical report and evaluation of these methodologies is completed, which leads to the conclusion that new ways of managing and measuring innovation need to be created and implemented at regional level. Finally, a new methodology is applied in the Region of Western Greece and generates results and conclusions. This new methodology includes the use of a new innovation indicator, as part of an overall indicator, which will be open to receive new measurable features of the enterprises and new applications for measurement, aiming at their subsequent synthesis. The enhanced indicator will provide further inputs to the way towards business excellence.
在全球化的商业世界中,在欧洲创造创新是发展有竞争力的经济的一个关键问题。除了创造创新之外,还需要一种系统的衡量方法,以便在欧洲和国家层面制定战略和政策。本研究回顾了欧盟使用的现有创新衡量指标方法,以确定最佳做法并鼓励企业使用它们。完成了对这些方法的批判性报告和评价,得出的结论是,需要在区域一级建立和执行管理和衡量创新的新方法。最后,在西希腊地区应用了一种新的方法,并产生了结果和结论。这种新方法包括使用新的创新指标,作为总体指标的一部分,该指标将开放接受企业的新的可测量特征和新的测量应用,旨在随后的综合。改进后的指标将为实现卓越业务提供进一步的投入。
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引用次数: 2
Autonomous Decentralized Multi-layered Data Consistency Technology and its application 自治分散多层数据一致性技术及其应用
Pub Date : 2009-03-23 DOI: 10.1109/ISADS.2009.5207375
Hidehiko Nagase, Motoharu Yamana, K. Mori, A. Shiibashi
With the diversification of users and systems requirements, the integration of control and information systems has become more and more important. In these systems, assurance is required to achieve high performance of real-time control and high reliability of the transaction process. However, in high load transaction conditions, it is difficult for conventional centralized systems to achieve data consistency during real-time processing. In this paper, “Autonomous Decentralized Multi-layered Data Consistency Technology (ADMLDCT)”is proposed, which is based on heterogeneous “Data Fields (DFs)”with different process times of data consistence. The consistent data and inconsistent data coexist in the system. In this technology, each layer autonomously makes data consistent and cooperates with other layers according to the different stay time of data. As a result, both the recovery of inconsistent data and congestion of each layer can be improved. These technologies have been applied to the IC (Integrated Circuit) Card ticket system of East Japan Railway Company, where the effectiveness of the technology has been proved.
随着用户和系统需求的多样化,控制与信息系统的集成变得越来越重要。在这些系统中,需要保证实时控制的高性能和交易过程的高可靠性。然而,在高负载事务条件下,传统的集中式系统在实时处理过程中难以实现数据一致性。本文提出了一种基于不同数据一致性处理时间的异构“数据场”的“自治分散多层数据一致性技术”(ADMLDCT)。系统中同时存在一致性数据和不一致性数据。在该技术中,每一层根据数据停留时间的不同,自主地使数据保持一致,并与其他层进行协作。这样既可以提高不一致数据的恢复,又可以提高各层的拥塞。这些技术已在东日本铁路公司的集成电路卡票务系统中得到应用,证明了该技术的有效性。
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引用次数: 0
期刊
2009 International Symposium on Autonomous Decentralized Systems
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