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2011 11th International Conference on ITS Telecommunications最新文献

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Robust hand gesture recognition system using motion templates 鲁棒手势识别系统使用运动模板
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060095
Shrikant Kulkarni, H. Manoj, S. David, V. Madumbu, Y. Kumar
This paper presents a robust hand gesture analysis system. The approach uses the video analytic technique of motion templates rather than conventional gesture recognition algorithms. Also, it utilizes background modeling and skin pixel detection which further strengthens the approach by making it tolerant to background clutter and noise. In addition it reduces the false detections to a considerable extent. The system does not necessitate the user to wear any coloured caps or gloves for the hands. Encouraging results were obtained and it was found that the methodology is flexible and can be manipulated to suit gesture based interaction as per the requirements of a system. It can also be implemented as a standalone system.
提出了一种鲁棒的手势分析系统。该方法采用运动模板的视频分析技术,而不是传统的手势识别算法。此外,该方法利用背景建模和皮肤像素检测,进一步增强了该方法对背景杂波和噪声的容忍度。此外,它在很大程度上减少了误检。该系统不需要用户戴任何彩色的帽子或手套。获得了令人鼓舞的结果,并且发现该方法是灵活的,可以根据系统的要求进行操作以适应基于手势的交互。它也可以作为一个独立的系统来实现。
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引用次数: 4
Securing computer networks communication by modifying computer network communication protocols 通过修改计算机网络通信协议来保护计算机网络通信
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060130
M. Youssef
This research presents a technique to protect computer networks communication by modifying communication protocol identifier. The main advantage of this technique is preventing "man in the middle" meddling from reconstructing sessions from collected data. Consequently, this approach can overcome seamless attacks performed by passive tapping and nonintrusive data captu ring techniques.
提出了一种通过修改通信协议标识符来保护计算机网络通信的技术。这种技术的主要优点是防止“中间人”干预从收集的数据中重建会话。因此,这种方法可以克服由被动窃听和非侵入性数据捕获环技术执行的无缝攻击。
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引用次数: 4
A modified decision directed channel tracking of 802.11p OFDM system 一种改进的802.11p OFDM系统决策定向信道跟踪方法
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060140
Kao-Peng Chou, Che-Kang Sun
A modified decision directed channel interpolation techniques of orthogonal frequency-division multiplexing (OFDM) system is proposed in this paper. The decision directed channel tracking method in OFDM system always encounters the error propagation problem. To make a practical design, the modified decision directed method in this paper is a low complexity algorithm which can lower the effect of decision error propagation. Simulation results show that the proposed algorithm outperform conventional block interpolations as the SNR exceed certain level.
提出了一种改进的正交频分复用(OFDM)系统的决策导向信道插值技术。OFDM系统中的决策定向信道跟踪方法经常遇到误差传播问题。从实际设计来看,本文改进的决策导向方法是一种低复杂度的算法,可以降低决策错误传播的影响。仿真结果表明,当信噪比超过一定水平时,该算法优于传统的块插值算法。
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引用次数: 7
Dissemination protocols to support cooperative adaptive cruise control (CACC) merging 支持协同自适应巡航控制(CACC)合并的传播协议
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060045
W. K. Wolterink, G. Heijenk, G. Karagiannis
Cooperative adaptive cruise control (CACC) is a form of cruise control in which vehicles cooperatively control their speed using wireless communication. Previously we have implemented CACC using beaconing: the regular broadcasting of status information using 802.11p. Currently we are concerned with extending both our beaconing mechanism and our CACC system to support automatic CACC merging. In this paper we focus on extending the beaconing mechanism to disseminate the required merging. We propose three beacon-based dissemination protocols and evaluate how well they are able to support automatic CACC merging. All protocols piggyback merging information on the CACC beacons, without changing the timing of the beacons. Our main goal is to identify which protocol can disseminate merging information during a CACC merging manoeuvre most efficiently. We show that all three protocols have low loss rates but that the impact on the network load differs per protocol.
协同自适应巡航控制(CACC)是一种车辆通过无线通信协同控制速度的巡航控制形式。以前我们已经使用信标实现了CACC:使用802.11p定期广播状态信息。目前我们关注的是扩展我们的信标机制和我们的CACC系统,以支持自动的CACC合并。在本文中,我们着重于扩展信标机制以传播所需的合并。我们提出了三种基于信标的传播协议,并评估了它们对自动CACC合并的支持程度。所有协议都在CACC信标上装载合并信息,而不改变信标的时间。我们的主要目标是确定在CACC合并机动期间哪种协议可以最有效地传播合并信息。我们展示了所有三种协议都具有较低的损失率,但对网络负载的影响因协议而异。
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引用次数: 18
Efficient map based location service for VANETs 高效的地图定位服务为VANETs
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060087
D. Ashok, M. Pai, J. Mouzna
One of the key aspects of any communication system is routing of packets. VANET is no exception and poses special challenges in routing techniques. Position based routing protocols are considered to be apt for vehicular networks [1] and to realize that a location service is being used. For a packet to be routed to a destination across the network, the destination's position is to be known in advance. In this paper a new location service paradigm is being proposed to get the destination car's position. An adaptive location update policy is being proposed to maintain up-to-date location information at the location server. The location service uses a density aware server selection policy which selects servers at high density regions of a city. A localized query answering strategy is used for replying to location queries where a server with latest location information replies for a query. The proposed solution is found to be an efficient model for providing location service and ensures a query success ratio of 90.10% at its peak and decreased localization error, at an average of 8m.
任何通信系统的一个关键方面是数据包的路由。VANET也不例外,在路由技术方面提出了特殊的挑战。基于位置的路由协议被认为适合于车辆网络[1],并实现正在使用的位置服务。对于要通过网络路由到目的地的数据包,需要提前知道目的地的位置。本文提出了一种新的定位服务范式来获取目标车辆的位置。提出了一种自适应位置更新策略,用于在位置服务器上维护最新的位置信息。位置服务使用密度感知服务器选择策略,该策略选择位于城市高密度区域的服务器。本地化查询应答策略用于应答位置查询,其中具有最新位置信息的服务器应答查询。结果表明,该解决方案是一种高效的定位服务提供模型,在峰值时查询成功率达到90.10%,定位误差平均在8m以内。
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引用次数: 23
A theoretical analysis of the Extended Kalman Filter for data fusion in vehicular positioning 扩展卡尔曼滤波在车辆定位数据融合中的理论分析
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060063
R. Toledo-Moreo, D. Gruyer, A. Lambert
Global Navigation Satellite Systems (GNSS) offer a great value for many location-based services and applications. However, due to their limitations in terms of coverage, continuity, accuracy and integrity, GNSS are often fused with some extra aiding sensors. To perform the data fusion of multiple sensors it is possible to find in the literature of the field a large number of approaches that claim better accuracy, efficiency in computational terms or robustness than a reference one that is given for comparison. Normally, this reference is the Extended Kalman Filter (EKF), the most common version of the Kalman Filter for non-linear systems. However, because sensors, tests, filter tunings, etc. vary largely from one publication to another, it is not possible in many occasions to have a clear idea of the real benefits of the different methods in fair terms. This paper presents a theoretical analysis of the goodness of the EKF in loosely coupled data fusion architectures. The methodology presented can be applied to understand the limitations of different approaches for fusing multiple sensors in non-linear systems. Illustrations depict a real case with a sensor-set consisting of a GNSS, a gyro and the odometry of a road vehicle.
全球导航卫星系统(GNSS)为许多基于位置的服务和应用提供了巨大的价值。然而,由于GNSS在覆盖范围、连续性、精度和完整性方面的局限性,GNSS经常与一些额外的辅助传感器融合在一起。为了执行多个传感器的数据融合,有可能在该领域的文献中找到大量声称在计算方面具有更好的准确性,效率或鲁棒性的方法,而不是给出用于比较的参考方法。通常,这个参考是扩展卡尔曼滤波器(EKF),这是非线性系统中最常见的卡尔曼滤波器版本。但是,由于传感器、测试、滤波器调优等在不同的出版物之间差异很大,因此在许多场合不可能公平地清楚地了解不同方法的真正好处。本文从理论上分析了EKF在松散耦合数据融合体系结构中的优越性。所提出的方法可以应用于了解在非线性系统中融合多个传感器的不同方法的局限性。插图描绘了一个真实的情况下,传感器集组成的GNSS,陀螺仪和里程计的道路车辆。
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引用次数: 8
Cross-network information dissemination in VANETs VANETs的跨网信息传播
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060081
G. Ferrari, S. Busanelli, Nicola Iotti, Y. Kaplan
In this work, we provide an overview of an innovative approach for effective cross-network information dissemination, with applications to Vehicular Ad-hoc Networks (VANETs). In particular, we describe the main approach followed in an on-going bilateral Italy-Israel project (“Cross-Network Effective Traffic Alert Dissemination,” X-NETAD). The X-NETAD project leverages on the spontaneous formation of WiFi local VANETs, with direct connections between neighboring vehicles, in order to disseminate, very quickly and inexpensively, traffic alerts received from the UMTS network.
在这项工作中,我们概述了一种有效的跨网络信息传播的创新方法,并将其应用于车载自组织网络(vanet)。我们特别介绍了正在进行的意大利-以色列双边项目(“跨网络有效交通警报传播”,X-NETAD)所采用的主要方法。X-NETAD项目利用自发形成的WiFi本地vanet,在相邻车辆之间直接连接,以非常快速和廉价的方式传播从UMTS网络接收到的交通警报。
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引用次数: 34
Performance evaluation of IEEE 802.11p for vehicular traffic congestion control IEEE 802.11p对车辆交通拥堵控制的性能评价
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060151
A. Murali, K. Bhanupriya, S. Smitha, G. N. Kumar
Vehicular traffic congestion in metropolitan cities during disaster is a challenge which presents dire consequences for transporting VIPs, life saving drugs, patients, accident victims in need of immediate medical assistance etc. With better navigation system and real-time traffic congestion updates, the vehicles can overcome delays. Vehicular Ad Hoc Network (VANETs), transmits the real time congestion information to the vehicles from a centralized database to avoid unexpected congestion and follow the shortest path to the destination. In this paper a proposed prototype which can be modified to work for the requirement with different models, such as general traffic prediction and re-routing during emergencies in case of fire, accidents etc. along the route is worked out. IEEE 802.11p which has been introduced exclusively for vehicular environments has been implemented at the Physical and Medium Access Control(MAC) layers of the WAVE protocol stack which was considered for a metropolitan city over an unpredictable high density of vehicles. Evaluation of the performance of IEEE 802.11p, Wireless Access for Vehicular Environment (WAVE) communication standard against IEEE802.11a for the vehicular environment for multiple scenarios has been simulated and the results are encouraging.
灾害期间大城市的车辆交通拥堵是一个挑战,它对运送贵宾、救生药品、病人、需要立即医疗援助的事故受害者等带来了可怕的后果。有了更好的导航系统和实时交通拥堵更新,这些车辆可以克服延误。车辆自组织网络(Vehicular Ad Hoc Network, VANETs)从一个集中的数据库向车辆传输实时的拥堵信息,以避免意外的拥堵,并沿着最短的路径到达目的地。本文提出了一种可修改的原型,该原型可适应不同模型的要求,如一般交通预测和沿线发生火灾、事故等突发事件时的改道。专为车辆环境引入的IEEE 802.11p已在WAVE协议栈的物理和介质访问控制(MAC)层实现,该协议被认为适用于不可预测的高密度车辆的大都市。对IEEE802.11a和ieee802.11 p车载环境无线接入(WAVE)通信标准在多种场景下的性能进行了仿真评估,结果令人鼓舞。
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引用次数: 21
Efficient dynamic scheduling scheme between vehicles and roadside units based on IEEE 802.11p/WAVE communication standard 基于IEEE 802.11p/WAVE通信标准的车辆与路边单元之间的高效动态调度方案
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060038
Teng Jiang, Y. Alfadhl, K. K. Chai
In recent years, Vehicle Ad Hoc Networks (VANETs) have become very popular. A typical VANET defines an intelligent way of using vehicular networking by integrating vehicular connections via a number of short-distance ad-hoc networking links, such as the IEEE802.11p. This type of system could provide effective communication between moving vehicles and fixed Road Side Units (RSUs), which are usually very expensive to install and may, in some cases, undergo heavy demand. To improve the efficiency of communication between vehicles and RSUs (Vehicle to Infrastructure, V2I), most existing work ignores the following facts: the uneven distribution of vehicles and unbalanced working loads on different RSUs. By considering the periodic and the unchanging features of public transportation, we propose a novel V2I hybrid optimisation scheme named Dynamic Resources Allocation Scheme (DRAS). In this scheme, all resources on the RSUs are scheduled as a whole and buses will be introduced as moving infrastructure points (or relay stations) to take some of the burden of the RSUs in real-time traffic conditions. We import the Variable-Length Contention Free Period (VL-CFP) for MAC access and also define Time-to-Live (TTL) value to guarantee the data credibility on bus. Using both Math analysis and NS-2 simulation, we can prove our DRAS can achieve a better QoS performance and adequate utilisation of RSU resources than legacy 802.11p and WAVE-based HCCA. These advantages become more obvious as the vehicles number increases.
近年来,车载自组织网络(vanet)变得非常流行。典型的VANET定义了一种使用车载网络的智能方式,通过许多短距离自组织网络链路(如IEEE802.11p)集成车辆连接。这种类型的系统可以在移动车辆和固定的路旁单元(rsu)之间提供有效的通信,这些装置通常安装非常昂贵,在某些情况下可能会有很大的需求。为了提高车辆与rsu之间的通信效率(Vehicle To Infrastructure, V2I),大多数现有工作忽略了以下事实:车辆分布不均匀,不同rsu上的工作负载不平衡。考虑到公共交通的周期性和不变性特点,提出了一种新的V2I混合优化方案——动态资源分配方案(DRAS)。在这个方案中,所有的rsu上的资源作为一个整体进行调度,公交车将被引入作为移动的基础设施点(或中继站),以在实时交通情况下承担rsu的一些负担。我们引入了可变长度争用自由周期(VL-CFP)用于MAC访问,并定义了生存时间(TTL)值以保证总线上数据的可信度。通过数学分析和NS-2仿真,我们可以证明我们的DRAS可以实现比传统802.11p和基于wave的HCCA更好的QoS性能和充分利用RSU资源。随着车辆数量的增加,这些优势变得更加明显。
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引用次数: 12
The maritime e-Navigation and the Titanic: Are there any links? 海上电子导航和泰坦尼克号:有什么联系吗?
Pub Date : 2011-10-27 DOI: 10.1109/ITST.2011.6060115
M. Fiorini
The International Maritime Organization (IMO) adopted the following definition of e-Navigation: “e-Navigation is the harmonized collection, integration, exchange, presentation and analysis of maritime information onboard and ashore by electronic means to enhance berth to berth navigation and related services, for safety and security at sea and protection of the marine environment”. The paper present an overview of maritime initiatives undergoing by the IMO and the European Union (EU) and recall the Titanic legend from the technology point of view.
国际海事组织(IMO)通过了以下电子导航的定义:“电子导航是通过电子手段在船上和岸上协调收集、整合、交换、展示和分析海事信息,以加强泊位到泊位的航行和相关服务,促进海上安全和保安和保护海洋环境”。本文概述了国际海事组织和欧盟(EU)正在进行的海事倡议,并从技术的角度回顾了泰坦尼克号的传奇。
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引用次数: 0
期刊
2011 11th International Conference on ITS Telecommunications
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