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2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux最新文献

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A New Hybrid Medium Access Mechanism with Integrated QoS Support for Wireless LANs 一种集成QoS支持的无线局域网混合介质接入机制
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436248
T. Lagkas, G. Papadimitriou, Petros Nicopolitidis, A. Pomportsis
{"title":"A New Hybrid Medium Access Mechanism with Integrated QoS Support for Wireless LANs","authors":"T. Lagkas, G. Papadimitriou, Petros Nicopolitidis, A. Pomportsis","doi":"10.1109/SCVT.2007.4436248","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436248","url":null,"abstract":"Modern wireless networks need to integrate different types of traditional and multimedia traffic. This paper proposes a new WLAN access mechanism as an alternative to the HCF (Hybrid Coordination Function) scheme defined by the IEEE 802.1 le workgroup to provide QoS in wireless LANs. POHA (Priority Oriented Hybrid Access) is a complete medium control protocol, it combines a polling based and a TDM A access scheme, provides QoS for all types of communications, adapts to the dynamic conditions of modern WLANs, optimizes channel utilization and station feedback, provides medium contention fairness, eliminates collisions, differentiates traffic based on priorities, supports dynamic resource assignment, and instantly negotiates the quality levels of the offered traffic streams trying to support multiple streams with best possible quality. POHA, compared with HCF, exhibits generally superior performance.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115831558","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
Performance Analysis of DVB-H OFDM Hierarchical Modulation in Impulse Noise Environment 脉冲噪声环境下DVB-H OFDM分层调制性能分析
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436259
Tamgnoue Valéry, V. Moeyaert, S. Bette, P. Mégret
{"title":"Performance Analysis of DVB-H OFDM Hierarchical Modulation in Impulse Noise Environment","authors":"Tamgnoue Valéry, V. Moeyaert, S. Bette, P. Mégret","doi":"10.1109/SCVT.2007.4436259","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436259","url":null,"abstract":"Hierarchical modulation, used in DVB-{T, H} (digital video broadcasting - terrestrial and handheld), allows two separate bit streams to be modulated on one single stream according to their relative priority (high priority and low priority stream). We investigate the robustness of coupled OFDM (orthogonal frequency division multiplex) and hierarchical modulation systems under impulse noise as it appears in DVB (digital video broadcasting) technologies. Analytically and confirmed by simulation, we estimate the penalty induced by the presence of impulse noise.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129781380","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: 5
Characterization of a confined environment based on acoustic and reverberation chamber theory. Comparison with the case of a car 基于声学和混响室理论的密闭环境表征。与汽车的情况比较
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436244
O. Delangre, P. De Doncker, S. Van Roy, M. Liénard, P. Degauque
{"title":"Characterization of a confined environment based on acoustic and reverberation chamber theory. Comparison with the case of a car","authors":"O. Delangre, P. De Doncker, S. Van Roy, M. Liénard, P. Degauque","doi":"10.1109/SCVT.2007.4436244","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436244","url":null,"abstract":"The study of propagation inside confined environments leads to very specific results. Specular reflections are not dominant and the result is more comparable with diffuse scattering. Evaluating this channel can be done using acoustic theory. However, this theory is described by a parameter, eta whose physical meaning lacks of description. Reverberation chamber theory can therefore be applied to estimate for example the delay spread inside a confined environment. This theory also suffers of some drawbacks. The most important is that it is only valide for sufficiently high Q factor. A car is a classical confined environment. Therefore, measurements inside a car are presented showing some common characteristics with a reverberation chamber.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127617724","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
An Admission Control Approach for Multiservice IP Networks 一种多业务IP网络的准入控制方法
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436241
B. Statovci-Halimi
{"title":"An Admission Control Approach for Multiservice IP Networks","authors":"B. Statovci-Halimi","doi":"10.1109/SCVT.2007.4436241","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436241","url":null,"abstract":"New service management paradigms, protocols and control mechanisms are required for supporting today's Internet service heterogeneity and integration while providing consistent quality of service (QoS). Within service management, admission control has been recognized as a convenient mechanism to provide high-quality communication by ensuring resources availability. It represents a meaning in fulfilling the contracted service level agreement (SLA) between the user and the network provider. This paper provides a thorough analysis on different classification approaches for admission control techniques, while identifying their characteristics, differences and analogies. It gives a more detailed analysis on the measurement-based admission control, and introduces an admission control approach based on measurements. The performance of this algorithm is illustrated through simulation results.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114310601","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
Efficient Pilot Pattern for OFDM-based Cognitive Radio Channel Estimation - Part 1 基于ofdm认知无线电信道估计的有效导频模式-第1部分
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436242
I. Rashad, I. Budiarjo, H. Nikookar
{"title":"Efficient Pilot Pattern for OFDM-based Cognitive Radio Channel Estimation - Part 1","authors":"I. Rashad, I. Budiarjo, H. Nikookar","doi":"10.1109/SCVT.2007.4436242","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436242","url":null,"abstract":"Nowadays research in the area of Cognitive Radio has grown tremendously. In the application of spectrum pooling in OFDM-based Cognitive Radio system there will be subcarriers that are deactivated due to the access of Licensed Users. The unloaded subcarriers that are caused by Licensed Users access create problems in performing channel estimation. The unloaded subcarriers restrict putting the pilot symbols in time and frequency lattice. This issue should be considered in the designing pilot symbols grid. In the part I of this paper, new pilot patterns for OFDM-based Cognitive Radio channel estimation are proposed. These new pilot patterns are the modification of rectangular pilot patterns by shifting the pilot subcarricrs into the adjacent subcarriers which are free from the interference of Licensed Users. Using the proposed pilot patterns, the channel estimation based on two cascaded one dimensional (2 times 1-D) Wiener filter is investigated by considering the appearance of narrowband and wideband Licensed Users. Results have shown that the proposed pilot pattern outperforms the regular pilot pattern by around 6.5 dB gain at Mean Square Error value of 2 times 10-3 in the case of narrowband interference.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127453886","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: 24
Quantitative Comparison of Resource Management Strategies in UMTS-WLAN Integration at the Radio Access Level 无线接入层UMTS-WLAN集成中资源管理策略的定量比较
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436251
N. Vulic, P. Patil, S. de Groot, I. Niemegeers
{"title":"Quantitative Comparison of Resource Management Strategies in UMTS-WLAN Integration at the Radio Access Level","authors":"N. Vulic, P. Patil, S. de Groot, I. Niemegeers","doi":"10.1109/SCVT.2007.4436251","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436251","url":null,"abstract":"The WLAN integration at the UMTS radio access level is a promising interworking approach, which provides the mobile operator with additional license-free bandwidth, enhances vertical handover performance and facilitates common management of all the available radio resources. The benefits are achieved at cost of various modifications of the UMTS radio access network. The modifications may be designed in different ways and may result in different architectural options with different performance. In; this paper, we present quantitative comparison of three architectural options, putting the focus on the initial radio interface selection algorithm.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122474000","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
A Lightweight and Self-adaptive Ad Hoc Routing Scheme for EUROPCOM Networks 一种用于EUROPCOM网络的轻量级自适应Ad Hoc路由方案
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436253
L. Xia, A. Lo, I. Niemegeers, T. Baugé
{"title":"A Lightweight and Self-adaptive Ad Hoc Routing Scheme for EUROPCOM Networks","authors":"L. Xia, A. Lo, I. Niemegeers, T. Baugé","doi":"10.1109/SCVT.2007.4436253","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436253","url":null,"abstract":"The 1ST EUROPCOM project designs and develops an ultra wideband (UWB)-based ad hoc network for search and rescue operations in disaster zones, especially indoors. The primary application of the EUROPCOM system is to provide position tracking of rescue personnel within the disaster zone. Currently no such technologies or systems exist, which can provide the envisaged functionality. The paper proposes a lightweight and self-adaptive ad hoc routing scheme that takes into consideration the operational characteristics and requirements of the EUROPCOM system. The proposed scheme does not introduce dedicated ad hoc routing packets. It takes advantage of data packets (e.g., positioning information) broadcast by each device. Routing information, which is needed to construct routes, is embedded in the header of the data packets. The optimum route is chosen based on hop count and congestion level of each device along the path. Our routing scheme is bandwidth-and energy-efficient.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"7 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117104763","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
TCP Throughput Measurements and Analysis in Wireless Multi-Hop Networks 无线多跳网络中TCP吞吐量的测量与分析
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436260
Michael Winkler, Cosimo Palazzo, Marco Bartolozzi
{"title":"TCP Throughput Measurements and Analysis in Wireless Multi-Hop Networks","authors":"Michael Winkler, Cosimo Palazzo, Marco Bartolozzi","doi":"10.1109/SCVT.2007.4436260","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436260","url":null,"abstract":"Multi-hop relay is essential for ad-hoc networking in order to interconnect remote communication devices. This enables information exchange in areas without a pre-deployed communications infrastructure, making it an appealing technology for the military community. The focus of this article is on TCP throughput measurements for multi-hop networking based on WLAN technology using COTS devices. The present study shows that the throughput as well as the stability of the routing topology for ad-hoc multi-hop communications do not always meet military requirements, and that special-purpose solutions and implementations are hence needed. Indoor as well as outdoor measurements are presented and compared with existing analytical research on throughput degradation in wireless multi-hop links. While results from multi-hop indoor measurements with MAC address filtering where generally in-line with analytical throughput curves, outdoor measurements indicate link instabilities for connections involving three hops or more as well as lower throughput. The article hence points to the need for \"real-life\" experiments in addition to existing network analysis and simulations.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115366763","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: 5
On the Capability of a Radar Network to Support Communications 雷达网络支持通信的能力研究
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436249
G. Lellouch, H. Nikookar
{"title":"On the Capability of a Radar Network to Support Communications","authors":"G. Lellouch, H. Nikookar","doi":"10.1109/SCVT.2007.4436249","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436249","url":null,"abstract":"Recent achievements in wireless technology could promote a new generation of radar networks, where the communication message for instance the reports on the detected targets, is embedded into the OFDM radar waveform. In this paper, the performance of a four-station network is assessed at the physical layer, in terms of bit error rate (BER) and throughput rate. On the one hand, we analyse the system performance w.r.t. the antenna pattern on reception and on the other hand we study the effects of different network or antenna set-ups. We consider 2 different design cases: (i) same directional radar antenna for transmission and reception and (ii) an additional omni-directional antenna at reception to support communications. Hints for an intelligent data fusion are provided. None of the traditional radar specific issues have been addressed.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116905671","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: 51
Wiener Feedback Filtering for Suppression of Residual ISI and Correlated Noise in MC-CDMA 维纳反馈滤波抑制MC-CDMA中残留ISI和相关噪声
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436262
Haibing Yang, J. Linnartz
{"title":"Wiener Feedback Filtering for Suppression of Residual ISI and Correlated Noise in MC-CDMA","authors":"Haibing Yang, J. Linnartz","doi":"10.1109/SCVT.2007.4436262","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436262","url":null,"abstract":"Multi-carrier CDMA takes advantage of frequency diversity by spreading each user symbol across multiple sub-carriers to improve the transmission performance. However, the performance of linear detection schemes is affected by the residual inter-symbol interference (ISI) and the correlated noise present in decision variables. In order to improve the performance, a decision feedback equalization (DFE) scheme is proposed in this paper. In the feedback stage, an optimal Wiener filter is designed to predict and suppress the residual ISI and the correlated noise caused by the channel equalization and code despreading in the feedforward stage. Simulations show that the proposed DFE scheme significantly outperforms the conventional linear minimum mean-square error (MMSE) receiver. By this scheme, a noise penalty between MC-CDMA and ideally coded OFDM is largely reduced.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126882265","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
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