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2012 IEEE 75th Vehicular Technology Conference (VTC Spring)最新文献

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Virtualization for Testing in Model-Driven Distributed System 模型驱动分布式系统中的虚拟化测试
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240140
Youngheum Kim, Seungyong Lee, Seungbeom Kim
{"title":"Virtualization for Testing in Model-Driven Distributed System","authors":"Youngheum Kim, Seungyong Lee, Seungbeom Kim","doi":"10.1109/VETECS.2012.6240140","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240140","url":null,"abstract":"Most automotive companies are facing key challenges of improving quality and reducing time to market with limited resources. One of the methods for achieving key challenges is virtual simulation test in early development phase. The methodology of creating a model-driven distributed system with communication database as well as automatically generating models from specifications is proposed. In order to detect faults of functions and inconsistency of communication signals between specifications and vehicle network, the manual and automated test methods which can verify a model-driven distributed system is represented. This was applied successfully in the production project. The usefulness of the developed methodology and the tool is well ensured through the discovery of defects.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116117682","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
RF-Based Vehicle Detection and Speed Estimation 基于射频的车辆检测与速度估计
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240184
N. Kassem, Ahmed E. Kosba, M. Youssef
{"title":"RF-Based Vehicle Detection and Speed Estimation","authors":"N. Kassem, Ahmed E. Kosba, M. Youssef","doi":"10.1109/VETECS.2012.6240184","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240184","url":null,"abstract":"Developing a robust and reliable vehicle detection and speed estimation system that alerts drivers about driving conditions and helps them avoid joining traffic jams is an important problem that has attracted lots of attention recently. In this paper, we introduce a novel RF-based vehicle motion detection and speed estimation system (ReVISE). Our system leverages the fact that the presence of objects in an RF environment affects the received signal strength and hence, can be used to detect and identify different characteristics of the objects in an area of interest. Our long-term vision for ReVISE is to leverage common wireless networks, such as WiFi or cellular, to detect the density of traffic and estimate the car speed based on the mobile devices carried by users. This gives us an edge over the current techniques for traffic estimation as we do not require any specialized hardware and the cellular signal strength information is available from all cell phones, providing large-scale ubiquitous traffic estimation. We present the design and analysis of ReVISE including its vehicle detection and speed estimation modules. The detection module can differentiate between an empty street, stationary cars, and moving cars based on a multi-class SVM approach that uses features from the RF signal strength. We also present two novel speed estimation techniques based on statistical and curve fitting approaches. Evaluation of ReVISE in a real testbed shows that the proposed techniques can detect vehicle motion with an accuracy of 100% and estimate the vehicle speed with an accuracy of 90% in typical streets. This highlights the feasibility and promise of using RF for vehicle detection and speed estimation.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115966292","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: 84
Energy-Efficient Resource Optimization for Relay-Aided Uplink OFDMA Systems 中继辅助上行OFDMA系统的节能资源优化
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6239918
Yun Jiang, Jian-hua Zhang, Xiaofan Li, W. Xu
{"title":"Energy-Efficient Resource Optimization for Relay-Aided Uplink OFDMA Systems","authors":"Yun Jiang, Jian-hua Zhang, Xiaofan Li, W. Xu","doi":"10.1109/VETECS.2012.6239918","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6239918","url":null,"abstract":"In this paper, the energy-efficient resource allocation in relay-aided uplink multiuser system is studied. We adopt the orthogonal frequency division multiplexing (OFDM) as the physical layer modulation technique. Assuming that the BS has all the channel state information (CSI), an energy-efficiency optimization problem through joint subcarrier assignment, bit and power allocation is formulated. Due to the computational complexity restriction, a suboptimal solution based on decomposition is presented to solve the problem with low complexity. Considering the fairness constraint, a joint resource allocation algorithm is further proposed, which is proved to achieve a considerable improvement in terms of energy-saving and simultaneously decreases rate outage probability by simulation results.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116633815","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
The Reliable Packet Transmission Based on PMIPv6 Route Optimization 基于PMIPv6路由优化的可靠报文传输
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240276
NamYeong Kwon, Moonseong Kim, Seungtak Oh, Hyunseung Choo
{"title":"The Reliable Packet Transmission Based on PMIPv6 Route Optimization","authors":"NamYeong Kwon, Moonseong Kim, Seungtak Oh, Hyunseung Choo","doi":"10.1109/VETECS.2012.6240276","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240276","url":null,"abstract":"Route Optimization (RO) is a function to minimize packet transmission delay through the optimal path between routers communicating with each other. Mobile IPv6 (MIPv6) also supports the RO to solve the triangle routing problem. Basic PMIPv6 does not support the RO. Thus, many schemes have been proposed to support RO in PMIPv6. However, these schemes do not consider the out-of-sequence problem, in which packets arrive out of order, which may happen between the existing path and the newly established RO path. This paper proposes a scheme to solve the out-of-sequence problem more precisely and with low cost. Our proposed scheme solves the problem by using the packet sequence number and the time when the problem occurs. In this paper, we compare PMIPv6 supported by the RO and the Out-of-sequence Time Period (OTP) scheme with our proposed scheme via simulation. Evaluation of the performance reveals PMIPv6 supported by the RO had 66 of out-of-sequence packets, and the OTP scheme has 30. However, our proposed scheme does not incur out-of sequence packets. Our proposed scheme guarantees reliable packet transmission by preventing the problem.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121668167","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
SNR-Adaptive Input Quantization for Turbo Decoding Turbo译码的自适应信噪比输入量化
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6239924
Injae Yoo, I. Park
{"title":"SNR-Adaptive Input Quantization for Turbo Decoding","authors":"Injae Yoo, I. Park","doi":"10.1109/VETECS.2012.6239924","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6239924","url":null,"abstract":"This paper presents how to control the input bit-width of a turbo decoder according to the signal-to-noise ratio (SNR) adaptively. It is crucial to minimize the input bit-width while maintaining the error-correcting performance. Several quantization schemes have been presented to properly decide the input resolution of turbo decoding, but they all assume a fixed bit-width irrespective of the SNR. This paper proposes a new method to adaptively change the quantization bit-width with respect to the SNR. In addition, this paper suggests a novel method to estimate the frame-error rate (FER) performance of a turbo decoder dealing with quantized channel outputs. As a result, the whole SNR range is divided into a number of regions each of which can be processed with a certain quantization bit-width.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121823537","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
Non-Linear Distortion Noise Control by Clipping and Filtering in Spectrum Sharing Systems 频谱共享系统中的剪切滤波非线性失真噪声控制
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240058
Seiichi Okamoto, S. Tomisato, H. Fujii, M. Hata, S. Miura, H. Kayama
{"title":"Non-Linear Distortion Noise Control by Clipping and Filtering in Spectrum Sharing Systems","authors":"Seiichi Okamoto, S. Tomisato, H. Fujii, M. Hata, S. Miura, H. Kayama","doi":"10.1109/VETECS.2012.6240058","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240058","url":null,"abstract":"This paper proposes a non-linear distortion noise control method for secondary systems in spectrum sharing. The proposed method is based on conventional clipping and filtering methods, and adaptively shapes distortion noise power to improve reception quality of secondary users with transmission power control. In this paper, optimal clipping levels to control in-band distortion noise are investigated, and then the spectrum property and BER performance with the clipping levels are evaluated. The results confirm that the proposed method can control the distortion power effectively in shared bands and realize secondary systems with less degradation of reception quality when sharing spectrum with transmission power control.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123743383","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
CARLA: Combining Cooperative Relaying and Link Adaptation for IEEE 802.11 Wireless Networks 结合IEEE 802.11无线网络的协作中继和链路自适应
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240061
Li Li, Z. Fan, D. Kaleshi
{"title":"CARLA: Combining Cooperative Relaying and Link Adaptation for IEEE 802.11 Wireless Networks","authors":"Li Li, Z. Fan, D. Kaleshi","doi":"10.1109/VETECS.2012.6240061","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240061","url":null,"abstract":"In this paper, we present a novel design named CARLA which combines Cooperative Relaying and Link Adaptation for IEEE 802.11 wireless networks, in order to maximize spectral efficiency and hence improve the throughput of the network. Unlike previous studies assuming that accurate channel information is available for relaying and link adaptation, the novelty of our approach is to use the expected packet transmission time (ETT) and RTS/CTS exchange to estimate the quality and level of contention for the current channel. By taking into account the quality of the direct channel from source to destination and the relay channel between relay and destination, CARLA enables both source and relay terminals to adjust their transmission rates so that not only the reliability of the transmission but also the bandwidth efficiency can be improved, hence fully utilizing the diversity gain. CARLA is a simple, distributed and rate-per-link adaptation protocol requiring no modification on 802.11 PHY and MAC. Simulation results show that CARLA can achieve significant performance improvement in terms of end-to-end throughput and energy efficiency for different network conditions.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125045193","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: 4
A New Switching Scheme for DVB-RCS+M Return Link in a Land Based Scenario 陆基场景下DVB-RCS+M回程链路交换新方案
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240291
M. Tropea, P. Fazio, S. Marano
{"title":"A New Switching Scheme for DVB-RCS+M Return Link in a Land Based Scenario","authors":"M. Tropea, P. Fazio, S. Marano","doi":"10.1109/VETECS.2012.6240291","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240291","url":null,"abstract":"An important suggestion of the standard for DVB-RCS+M is the possibility of using a continuous carrier operation mode in the return channel beyond the classical MF-TDMA mode. In order to realize it a mechanism for switching between these two modalities has to be used. In this paper, after showing the typologies of applications considered in the simulation, a proposal of a novel switching mechanism is presented and the simulation results are reported in order to provide some guidelines to the satellite operators that want to adopt in their satellite system this hybrid mode. The simulation results provide good indications and this study is the base for more depth researches.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116565179","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
Inter-Tier Handover in Macrocell/Relay/Femtocell Heterogeneous Networks Macrocell/Relay/Femtocell异构网络中的层间切换
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240253
Chuan Ma, Guanding Yu, Jietao Zhang
{"title":"Inter-Tier Handover in Macrocell/Relay/Femtocell Heterogeneous Networks","authors":"Chuan Ma, Guanding Yu, Jietao Zhang","doi":"10.1109/VETECS.2012.6240253","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240253","url":null,"abstract":"Handover decision is one of the technical challenges in the heterogeneous network (HetNet). Current researches on this topic concentrate mainly on the two-tier networks. In this paper, we investigates the handover decision scheme for a more complex network: three-tier macrocell/relay/femtocell network. The unique characteristics of the inter-tier handover in three-tier networks are analyzed in this paper and an effective handover algorithm is proposed to reduce the frequent and unnecessary handovers based on the ideas of dwell probability and handover priority. Simulation results show that the proposed algorithm significantly reduces the number of handovers while maintaining the call dropping rate at the same level.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122674231","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: 12
Channel Selection HARQ Feedback in LTE-Advanced LTE-Advanced中的信道选择HARQ反馈
2012 IEEE 75th Vehicular Technology Conference (VTC Spring) Pub Date : 2012-05-06 DOI: 10.1109/VETECS.2012.6240077
F. Berggren, Jianghua Liu
{"title":"Channel Selection HARQ Feedback in LTE-Advanced","authors":"F. Berggren, Jianghua Liu","doi":"10.1109/VETECS.2012.6240077","DOIUrl":"https://doi.org/10.1109/VETECS.2012.6240077","url":null,"abstract":"LTE-Advanced supports carrier aggregation which implies that ACK/NACK information bits for multiple downlink carriers are fed back in the uplink. One method for HARQ feedback with multiple ACK/NACK bits is channel selection, wherein ACK/NACK information is encoded by the joint selection of a channel (transmit sequence) and a QPSK symbol. We give a signal design for mapping ACK/NACK information to the channels and modulation symbols, in order to minimize and equalize the ACK-to-NACK and NACK-to-ACK error probabilities. It is shown how the performance depends on the set of channels assigned to a given ACK/NACK bit.","PeriodicalId":333610,"journal":{"name":"2012 IEEE 75th Vehicular Technology Conference (VTC Spring)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912177","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
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