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VTC Spring 2009 - IEEE 69th Vehicular Technology Conference最新文献

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On the Design of Efficient Vehicular Applications 浅谈高效车辆的设计应用
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073727
Y. Khaled, Manabu Tsukada, J. Santa, T. Ernst
{"title":"On the Design of Efficient Vehicular Applications","authors":"Y. Khaled, Manabu Tsukada, J. Santa, T. Ernst","doi":"10.1109/VETECS.2009.5073727","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073727","url":null,"abstract":"Vehicular communications attract the attention of many people in the networking research world. These networks present some special features, such as high mobility or specific topologies, which affect the performance of applications. In order to select the appropriate technologies, more effort should be directed to identify the final necessities of the network. Few works identify possible applications of vehicular networks, but none of them link application requirements which networking technologies available in the vehicular field. In this paper, we fill this gap, and propose an analysis of application requirements and study how to deal with them using communication technologies for the physical and network level. This study contains key factors which must be taken into account, especially, at the designing stage of the vehicular network.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122192102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Towards an Optimisation of Parameters Setting in WLANs 无线局域网参数设置的优化研究
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073888
Daniel Sebastião, L. Correia
{"title":"Towards an Optimisation of Parameters Setting in WLANs","authors":"Daniel Sebastião, L. Correia","doi":"10.1109/VETECS.2009.5073888","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073888","url":null,"abstract":"This paper studies performance optimisation in WLANs, by means of Quality of Service (QoS) algorithms. The 802.11e standard for QoS is analysed, compared to legacy ones, new algorithms being developed in order to improve it. All this was done in multi-service, multi-profile scenarios, with a varying number of users, in order to emulate the behaviour of real networks. QoS mechanisms manage to increase performance in all analysed scenarios, e.g., up to 7 times less delay, but these values are fixed. New algorithms for the QoS mechanisms were tested, i.e., changing channel access parameters to see if better performance can be achieved. It can be seen that better performance may be achieved by fine-tuning up the network \"on the fly\", i.e., by varying the parameters and adapting them according to the network location and usage profile at a given instant. All the performance analyses were done by using the OPNET Modeler simulation tool with its wireless module.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117034254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Embedded Automated Mobile Tracking & Security System 嵌入式自动移动跟踪和安全系统
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073529
Gary O'Connor, S. Weber, Antony Guinard, Donna Griffin, D. Pesch
{"title":"Embedded Automated Mobile Tracking & Security System","authors":"Gary O'Connor, S. Weber, Antony Guinard, Donna Griffin, D. Pesch","doi":"10.1109/VETECS.2009.5073529","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073529","url":null,"abstract":"Mobile devices are rapidly evolving beyond their original design specification. With the inclusion of innovative sensing and actuating facilities, the potential application space of these new devices is huge. The challenge now becomes harnessing the abilities' of these instruments in innovative ways. It is the aim of this paper to provide a unique service rich architecture integrating some of these novel sensing capabilities (i.e. GPS, accelerometer, gyroscope) to provide a potential \"killer application\" in the location and tracking space. Existing tracking systems in the mobile devices area are quite invasive for the user and labour intensive from a commercial perspective. The architecture proposed here is much more transparent, can be entirely automated and incorporates a Rich Internet Architecture (RIA) approach, a first for this type of scenario. *","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129747787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distributed and Adaptive Channel Allocation Algorithm for a Wireless Mesh Network with Directional Antennas 定向天线无线网状网络的分布式和自适应信道分配算法
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073498
Gwan-Hee Lee, S. Bahk
{"title":"Distributed and Adaptive Channel Allocation Algorithm for a Wireless Mesh Network with Directional Antennas","authors":"Gwan-Hee Lee, S. Bahk","doi":"10.1109/VETECS.2009.5073498","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073498","url":null,"abstract":"To create a wireless backbone network, channel allocation algorithms in mesh networks have been actively researched these days, but they still have the problem of scalability. When they operate in a centralized manner, they are not able to guarantee the upper-bound of the channel allocation time. This paper considers a new channel allocation algorithm that works under the environments of directional antennas. It allocates channels in a distributed manner and also adaptively by reflecting the traffic demand. To do so, we reconstruct the network into several groups to apply 2P MAC protocol, remove the interference caused by the directional antennas, and allocate a channel to each link without resorting to a central manager. Through simulation work, we prove that our distributed and adaptive channel allocation (DACA) achieves good performance, in terms of packet drop and channel allocation delay, compared with the other competitive channel allocation algorithms.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128229251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Implementing Trusted Vehicular Communications 实现可信车辆通信
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073588
M. Gerlach, Florian Friederici
{"title":"Implementing Trusted Vehicular Communications","authors":"M. Gerlach, Florian Friederici","doi":"10.1109/VETECS.2009.5073588","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073588","url":null,"abstract":"The main software modules included in the overall package are currently: (1) the encap and decap modules, realized as applications running in the background, (2) front-ends in different programming languages for easy integration into an existing application, and (3) a command line tool for generating valid certificates and keys for a node, called ca- tool (certification authority). Using the current status of the software, we already demonstrated simple scenarios for secure vehicular communications, where security is integrated, for example, into an emergency vehicle application. The modularity and the portability of the existing software makes it unique as a tool for fostering future research concerning secure VC. Results of future research issues, like secure integration into existing applications, the use of cryptographic and tamper proof hardware, the methods for proper identity management and their handling in a future system can easily be tested and integrated into existing applications using the trusted communications testbed software. This in turn will support the use of security in field tests and will make it possible to concentrate on the real problems there. The software is licensed under the GPL and can be obtained upon request.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128229430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Multidimensional Markov Models for the Cross-Layer Design of Multi-Rate Wireless Systems Using the Effective Capacity Function 基于有效容量函数的多速率无线系统跨层设计的多维马尔可夫模型
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073699
L. Carrasco, J. Ramis, G. Femenias
{"title":"Multidimensional Markov Models for the Cross-Layer Design of Multi-Rate Wireless Systems Using the Effective Capacity Function","authors":"L. Carrasco, J. Ramis, G. Femenias","doi":"10.1109/VETECS.2009.5073699","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073699","url":null,"abstract":"In this paper, a novel framework for the cross-layer design of wireless networks combining adaptive modulation and coding (AMC) at the physical layer with an automatic repeat request (ARQ) protocol at the data-link layer is proposed. In order to achieve this goal, the physical-layer service process is first modeled as a multidimensional finite-state Markov chain. Then, based on this multidimensional Markov model, the QoS performance at the data-link layer is characterized using the effective capacity approach. Queueing analysis using this effective capacity function is finally used in a cross-layer design approach aiming to satisfy the required average packet loss probability constraint by maximizing the average throughput of the system. Numerical examples are provided to show the advantages of our approach compared to other approaches using first-order amplitude-based finite state Markov models.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128325488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Can We Find (and Use) "Spectrum Holes"? Spectrum Sensing and Spatial Reuse Opportunities in "Cognitive" Radio Systems 我们能找到(并使用)吗?“频谱空穴”?“认知”无线电系统中的频谱感知和空间重用机会
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073427
J. Zander
{"title":"Can We Find (and Use) \"Spectrum Holes\"? Spectrum Sensing and Spatial Reuse Opportunities in \"Cognitive\" Radio Systems","authors":"J. Zander","doi":"10.1109/VETECS.2009.5073427","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073427","url":null,"abstract":"A main concern in spectrum overlays (\"Cognitive Radio\") has been the reliability of sensing techniques to predict the performance in the primary communication link if the secondary user decides to ...","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128783090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Overlay Cognitive Radio with Multiple Secondaries and its Application to Wireless Mesh Networks 多次叠加认知无线电及其在无线Mesh网络中的应用
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073764
R. C. Pereira, R. Souza, M. Pellenz
{"title":"Overlay Cognitive Radio with Multiple Secondaries and its Application to Wireless Mesh Networks","authors":"R. C. Pereira, R. Souza, M. Pellenz","doi":"10.1109/VETECS.2009.5073764","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073764","url":null,"abstract":"In this paper we extend the overlay cognitive radio model by introducing multiple secondaries. The new model allows for multiple concurrent transmissions in a wireless network. We apply the proposed scheme for the communication between nodes in a wireless mesh network. Numerical results show that considerable capacity gains are achieved when using the proposed overlay cognitive radio model with multiple secondaries.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128373664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Power Allocation for OFDM Based Links in Hybrid Forward Relay 混合转发中继中基于OFDM链路的功率分配
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073810
Xiaofan Li, Jian-hua Zhang, Yanyan Zhang, Jiangchun Huang
{"title":"Power Allocation for OFDM Based Links in Hybrid Forward Relay","authors":"Xiaofan Li, Jian-hua Zhang, Yanyan Zhang, Jiangchun Huang","doi":"10.1109/VETECS.2009.5073810","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073810","url":null,"abstract":"In this paper, we consider a two-hop orthogonal fre- quency division multiplexing (OFDM) relay link, and investigate the system capacity in hybrid forward (HF) relay through the power allocation (PA). The expression of the system capacity in HF relay is provided. Two situations about the power constraint are concerned, and under each situation, the selection criterion among different forwarding schemes in HF relay is proposed by means of capacity comparison on the subcarrier pair. From the selection criterions, the source or relay can adaptively choose the best scheme for every subcarrier pair according to the channel condition. Then the optimal solutions of the relay PA and the joint PA are derived to maximize the capacity. In the simulation, the advantage of the HF relay is shown in terms of capacity improvement compared with the conventional forward relay.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124593188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
How to Select the OOK Detection Threshold in Wireless Ad Hoc and Sensor Networks 如何在无线自组织和传感器网络中选择OOK检测阈值
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073578
M. d’Angelo, C. Fischione
{"title":"How to Select the OOK Detection Threshold in Wireless Ad Hoc and Sensor Networks","authors":"M. d’Angelo, C. Fischione","doi":"10.1109/VETECS.2009.5073578","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073578","url":null,"abstract":"On-off keying (OOK) is an attractive modulation technique to reduce energy consumption of power-constrained wireless networks. The OOK detection threshold, however, must be carefully selected to minimize the bit error probability (BER). This is a challenging task to accomplish on resource-limited nodes or on networks with high-mobility. In this paper, an efficient algorithm to compute the optimal threshold is proposed. The system scenario considers nodes simultaneously transmitting over same frequencies in Rayleigh-log-normal or Rice-log-normal fad- ing conditions. It is shown that by using the Stirling expansion for the BER, and a log-normal approximation, a quick contraction- mapping can be built to achieve the threshold numerically. The mapping is simple to implement and converges quickly. Numerical simulations verify the validity of the theoretical analysis, and show that the new algorithm performs quite well in scenarios of practical interest.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124749281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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