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2015 7th International Conference on New Technologies, Mobility and Security (NTMS)最新文献

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Minimizing traffic jams in urban Centers using vehicular ad hoc networks 使用车辆自组织网络减少城市中心的交通堵塞
A. M. Souza, R. S. Yokoyama, Guilherme Maia, A. Loureiro, L. Villas
Traffic jam in urban centers is a mobility problem responsible for significant economic losses and the degradation of the environment. However, a wide range of technologies, in particular, intelligent transportation systems, may be used to predict, identify and reduce vehicular traffic congestion. In this context, this work presents an Intelligent Traffic Information System (ITIS) which relies on inter-vehicle communication in order to avoid traffic jams in urban centers. The main goal of the proposed system is to reduce the average trip time, the fuel consumption and CO2 emissions, thus increasing vehicular traffic efficiency, reducing economic losses and making cities more environmental friendly. Simulation results for a synthetic scenario have shown that our proposed system is able to accomplish this goal. In particular, the average trip time was decreased ≈47%, the fuel consumption ≈22% and the CO2 emission ≈24%.
城市中心的交通堵塞是造成重大经济损失和环境恶化的流动性问题。然而,广泛的技术,特别是智能交通系统,可用于预测、识别和减少车辆交通拥堵。在此背景下,本研究提出了一种智能交通信息系统(ITIS),该系统依靠车辆间通信来避免城市中心的交通拥堵。该系统的主要目标是减少平均出行时间、燃料消耗和二氧化碳排放,从而提高车辆交通效率,减少经济损失,使城市更加环保。一个综合场景的仿真结果表明,我们提出的系统能够实现这一目标。其中,平均行程时间≈47%,油耗≈22%,二氧化碳排放量≈24%。
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引用次数: 13
Elastic flow rerouting 弹性流量改道
Yoann Foquet, D. Nace
This work discuss briefly the Elastic Flow Rerouting (EFR) - a traffic restoration strategy for protecting traffic flows in communication networks (including wireless networks). EFR aims at alleviating the trade-off between practicabilty of traffic restoration and the cost of network resources observed in existing networking solutions. We provide a discussion on the strategy and position it among the other strategies.
本文简要讨论了弹性流量重路由(EFR)——一种用于保护通信网络(包括无线网络)中流量的流量恢复策略。EFR旨在缓解现有网络解决方案中流量恢复的实用性与网络资源成本之间的权衡。我们对该策略进行了讨论,并将其置于其他策略中。
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引用次数: 0
A comparison analysis of trust-adaptive approaches to deliver signed public keys in P2P systems P2P系统中可信自适应公钥交付方法的比较分析
R. Pecori
An important and common prerequisite of many asymmetric cryptography systems is the availability of a secure mechanism for exchanging or distributing public keys. In this paper we compare two adaptive trust-based distributed schemes to deliver public keys in a peer-to-peer network. In such a scenario, centralized solutions, for example based on a certification authority or a public key infrastructure, cannot be used. For this reason we considered a completely distributed approach creating a sort of context aware web-of-trust. This is achieved in two different trust-based manners: one considering a classic request-response scheme and another one that exploits a Distributed Hash Table (DHT). We compare performances of both solutions trying to find an optimum trade-off.
许多非对称加密系统的一个重要且常见的先决条件是具有用于交换或分发公钥的安全机制。本文比较了两种基于自适应信任的分布式方案在点对点网络中的公钥交付。在这种情况下,不能使用集中式解决方案,例如基于证书颁发机构或公钥基础设施的解决方案。出于这个原因,我们考虑了一种完全分布式的方法,创建一种上下文感知的信任网络。这是通过两种不同的基于信任的方式实现的:一种考虑经典的请求-响应模式,另一种利用分布式哈希表(DHT)。我们比较两种解决方案的性能,试图找到一个最优的权衡。
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引用次数: 12
Sahyog: A middleware for mobile collaborative applications Sahyog:移动协作应用的中间件
Garvita Bajaj, Pushpendra Singh
The ubiquitous nature of mobile devices offering high computing capabilities has attracted a large number of users. The sensors available on these devices provide valuable data about user contexts, which when combined with sensor data from other mobile devices can reveal interesting environmental contexts, which can then be used for applications like real-time traffic monitoring, noise mapping, crowdmapping, etc. Developing applications for inferring environmental context requires participation from multiple users satisfying certain requirements (e.g., location of users etc.); hence, building such applications requires developers to carefully identify potential collaborators satisfying these conditions. This makes the development of such applications cumbersome and time-consuming. In this work, we present Sahyog1 - a publish-subscribe framework that allows developers to specify these requirements and identify users that can actively participate in such applications. Sahyog helps application developers request data from a large number of users without worrying about reaching out to users, communicating data requests and responses, and storing information. We discuss the design and implementation of our system with the underlying research challenges, and evaluate it using several parameters.
提供高计算能力的移动设备无处不在的特性吸引了大量用户。这些设备上可用的传感器提供有关用户环境的宝贵数据,当与来自其他移动设备的传感器数据相结合时,可以揭示有趣的环境背景,然后可以用于实时交通监控,噪音地图,人群地图等应用。开发用于推断环境背景的应用程序需要多个用户的参与,以满足某些要求(例如,用户的位置等);因此,构建这样的应用程序需要开发人员仔细识别满足这些条件的潜在合作者。这使得此类应用程序的开发既繁琐又耗时。在这项工作中,我们提出了Sahyog1——一个发布-订阅框架,它允许开发人员指定这些需求,并识别可以积极参与此类应用程序的用户。Sahyog帮助应用程序开发人员向大量用户请求数据,而不必担心接触用户、通信数据请求和响应以及存储信息。我们讨论了系统的设计和实现以及潜在的研究挑战,并使用几个参数对其进行评估。
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引用次数: 7
WiFi/WhiteFi handover: Signaling and performance WiFi/WhiteFi切换:信令和性能
Budoor Bawazeer, N. Adra, G. Aldabbagh, N. Dimitriou
With the increasing number of smart devices and handheld computers, mobile users should be provided with always-on connectivity. Many research works have addressed the problem of providing mobile users with a seamless handover to avoid losing connectivity while moving to uncovered areas or gaps among WiFi access points (AP). The criteria of choosing the target network to which to perform the handover are of great importance. In this regard, the access technology that uses the TV White Space (TVWS) spectrum, which is the unused TV spectrum characterized by lower frequencies and higher bandwidths, is considered to be the perfect choice for handover from WiFi due to its wide coverage area and low cost. This work will study the handover between WiFi and WhiteFi, which is a WiFi amendment to operate on TVWS. Different handover signaling schemes are presented and the handover performance is evaluated in terms of handover scanning delay. MIH (Media Independent Handover) protocol is used to reduce the scanning delay by communicating with the WhiteFi Registered Location Secure Server (RLSS). Handover performance study was conducted to evaluate the total handover delay in terms of available bandwidth, hops count and required signaling messages size.
随着智能设备和掌上电脑数量的增加,移动用户应该提供始终在线的连接。许多研究工作已经解决了为移动用户提供无缝切换的问题,以避免在移动到未覆盖的区域或WiFi接入点(AP)之间的间隙时失去连接。选择执行切换的目标网络的标准非常重要。因此,利用电视空白频段(TV White Space, TVWS)频谱的接入技术,由于其覆盖范围广、成本低,被认为是WiFi切换的最佳选择。TV空白频段是频率较低、带宽较高的未使用电视频谱。本工作将研究WiFi与WhiteFi之间的切换,WhiteFi是在TVWS上运行的WiFi修正。提出了不同的切换信令方案,并从切换扫描时延的角度对切换性能进行了评价。MIH(媒体独立切换)协议通过与白efi注册位置安全服务器(RLSS)通信来减少扫描延迟。通过切换性能研究,从可用带宽、跳数和所需信令消息大小三个方面评估总切换延迟。
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引用次数: 0
Numerical reproducibility: Feasibility issues 数值再现性:可行性问题
P. Langlois, R. Nheili, C. Denis
Floating-point arithmetic may introduce failures of the numerical reproducibility between a priori similar sequential and parallel executions of HPC simulation. We present how to apply some existing techniques to part of hydrodynamic finite element simulations. We analyze how easy these techniques allow us to recover its numerical reproducibility.
浮点运算可能会导致HPC模拟的先验相似顺序和并行执行之间的数值再现性失效。介绍了如何将现有的一些技术应用于部分水动力有限元模拟。我们分析了这些技术使我们能够很容易地恢复其数值再现性。
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引用次数: 6
Mining social networks for software vulnerabilities monitoring 挖掘社交网络,监测软件漏洞
S. Trabelsi, H. Plate, Amine Abida, M. Marouane, Ben Aoun, Anis Zouaoui, C. Missaoui, Sofien Gharbi, Alaeddine Ayari
Staying informed about security vulnerabilities, work-arounds and the availability of patches regarding the components of a given system is crucial to ensure system security. Several channels can be used to the monitor the new vulnerabilities publications, but these channels are scattered. We propose in this paper a vulnerability monitoring system based on twitter analysis that aggregates and analyses different sources of data and extracts zero-day vulnerabilities.
了解有关给定系统组件的安全漏洞、变通方法和补丁的可用性对于确保系统安全性至关重要。可以使用多个通道来监控新的漏洞发布,但这些通道是分散的。本文提出了一种基于twitter分析的漏洞监控系统,该系统可以对不同来源的数据进行汇总分析,提取零日漏洞。
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引用次数: 23
A new energy saving framework for long lasting wireless sensor nodes 一种用于长寿命无线传感器节点的新型节能框架
D. Sacaleanu, L. Perisoara, R. Stoian, V. Lazarescu
This paper proposes a new data processing framework for energy saving, based on a synergy between data compression and data aggregation techniques. This combination allows a more compact representation of the transmitted data in the clusters head nodes compared with the individual use of each technique. For data compression, we use the static Huffman algorithm with Extrapolation prediction that exploits Temporal correlation (ET) and static Huffman algorithm with Differential prediction that exploits Spatial correlation (DS). For data aggregation we use a Bit Aggregation Technique (BAT) to efficiently represent the data carrying bits from a byte. To validate the synergetic combination between ET, DS and BAT, we developed two platforms that allow us to simulate and practical implement the algorithms. The performances are compared with those of the classical Adaptive Huffman algorithm with Differential prediction that exploits Temporal correlation (DT). The results show an important decrease of energy consumption for the synergetic solution obtained both on software and hardware platforms.
基于数据压缩和数据聚合技术的协同作用,提出了一种新的节能数据处理框架。与单独使用每种技术相比,这种组合允许在簇头节点中更紧凑地表示传输的数据。对于数据压缩,我们使用静态霍夫曼算法与外推预测,利用时间相关性(ET)和静态霍夫曼算法与差分预测,利用空间相关性(DS)。对于数据聚合,我们使用位聚合技术(BAT)来有效地表示从一个字节中携带的数据位。为了验证ET, DS和BAT之间的协同组合,我们开发了两个平台,允许我们模拟和实际实现算法。将其性能与利用时间相关(DT)进行微分预测的经典自适应霍夫曼算法进行了比较。结果表明,在软件和硬件平台上获得的协同解决方案的能耗显著降低。
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引用次数: 4
Reliable and flexible communications for power systems: Fault-tolerant multicast with SDN/OpenFlow 电力系统可靠灵活的通信:SDN/OpenFlow容错组播
T. Pfeiffenberger, J. Du, Pedro Bittencourt Arruda, A. Anzaloni
Our work evaluates the use of software-defined networking (SDN) for reliable communication. Reliable communication has become an important topic in many areas, including energy communication networks or, more generally, automation control networks. Electrical grids are developing into smart grids, which depend heavily on reliability, robustness and optimized resource usage. On the other side, the separation of communication and network control proposed by SDN opens new possibilities for reliable and flexible networks. In this work, we show how OpenFlow, the leading SDN framework, could be used to solve the problem of robust multicast better than existing technologies used by substations. Our solution uses the fast-failover groups feature of OpenFlow to provide one-link fault tolerance with little packet loss and can provide routes that use resources efficiently and are less likely to fail. Robust shortest path routing and minimum spanning tree broadcast routing come as special cases. We also show how this solution can be extended to handle more link failures (even an arbitrary number of them) or to provide more efficient routes.
我们的工作评估了软件定义网络(SDN)用于可靠通信的使用。可靠通信已成为许多领域的重要课题,包括能源通信网络或更普遍的自动化控制网络。电网正在向智能电网发展,这在很大程度上取决于可靠性、鲁棒性和资源的优化利用。另一方面,SDN提出的通信与网络控制的分离,为网络的可靠和灵活提供了新的可能性。在这项工作中,我们展示了如何使用领先的SDN框架OpenFlow来解决比变电站使用的现有技术更好的鲁棒多播问题。我们的解决方案使用OpenFlow的快速故障转移组特性,提供单链路容错,数据包丢失少,并且可以提供有效使用资源且不太可能失败的路由。鲁棒最短路径路由和最小生成树广播路由是特殊情况。我们还将展示如何扩展此解决方案以处理更多的链路故障(甚至任意数量的链路故障)或提供更有效的路由。
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引用次数: 48
MASCA: MAnagement of simultaneous connectivity for applications MASCA:管理应用程序的同时连接
Victor Tortorello, L. H. Nakamura, D. C. Lobato, R. Meneguette
Nowadays, wireless technologies and mobile communication networks have been widely used in many public places due to the greater flexibility, reduced wiring cost and improved efficiency when compared to wired alternatives. Particularly, the real time wireless technologies allow users to collect and transmit data in a timely manner and also draw a good attention of them. This transmission does not only involves the web data, but also control messages. Also, it has a high impact on the traditional wireless and mobile communication networks. Thus, one of the most challenge in this research area is the designing of an efficient and robust mobility management. This work aims at developing an application that will manage connections made by mobile devices, providing the user with the ability to map their connections for each application, enabling the simultaneous use of more than one network interface; therefore our solution seeks to increase the flow of data user. Our proposal uses smartphones for the creation of application development, which was developed for Android platforms, in order to contribute to the open source community.
如今,无线技术和移动通信网络已经广泛应用于许多公共场所,因为与有线相比,无线技术和移动通信网络具有更大的灵活性,更低的布线成本和更高的效率。特别是实时无线技术,使用户能够及时地收集和传输数据,也引起了用户的重视。这种传输不仅涉及网络数据,还涉及控制消息。同时,它对传统的无线和移动通信网络也产生了很大的冲击。因此,设计一种高效、健壮的移动管理系统是该研究领域面临的最大挑战之一。这项工作旨在开发一个应用程序,该应用程序将管理由移动设备建立的连接,为用户提供映射每个应用程序的连接的能力,从而能够同时使用多个网络接口;因此,我们的解决方案旨在增加数据用户的流量。我们的提案使用智能手机来创建应用程序开发,这是为Android平台开发的,以便为开源社区做出贡献。
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引用次数: 2
期刊
2015 7th International Conference on New Technologies, Mobility and Security (NTMS)
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