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2007 IEEE 66th Vehicular Technology Conference最新文献

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A Power-Controlled 2-Dimensional Block Spread DS-CDMA Cellular System with Uplink Site Selection Diversity 具有上行选址分集的功率控制二维块扩展DS-CDMA蜂窝系统
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.211
Le Liu, F. Adachi
{"title":"A Power-Controlled 2-Dimensional Block Spread DS-CDMA Cellular System with Uplink Site Selection Diversity","authors":"Le Liu, F. Adachi","doi":"10.1109/VETECF.2007.211","DOIUrl":"https://doi.org/10.1109/VETECF.2007.211","url":null,"abstract":"2-dimensional (2D) block spread direct sequence-code division multiple access (DS-CDMA) allows uplink mutli- rate/mutli-connection transmissions without causing a serious multi-access interference (MAI) in the presence of a frequency- selective fading channel. However, in a cellular system, the inter- cell interference remains. The site selection diversity (SSD) can be used to reduce the inter-cell interference and increase the uplink capacity. Furthermore, transmit power control (TPC) is necessary to combat the near-far problem. In this paper, we discuss the impact of SSD and TPC on the uplink capacity of 2D block spread DS-CDMA and compare it with those of conventional DS-CDMA and ID block spread DS-CDMA.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128544956","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
Saturation Performance of IEEE 802.11 Broadcast Scheme in Ad Hoc Wireless LANs IEEE 802.11广播方案在Ad Hoc无线局域网中的饱和性能研究
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.399
Xianbo Chen, H. Refai, Xiaomin Ma
{"title":"Saturation Performance of IEEE 802.11 Broadcast Scheme in Ad Hoc Wireless LANs","authors":"Xianbo Chen, H. Refai, Xiaomin Ma","doi":"10.1109/VETECF.2007.399","DOIUrl":"https://doi.org/10.1109/VETECF.2007.399","url":null,"abstract":"Broadcast communication is important in inter- vehicle communication. Vehicles broadcast safety related messages to pre-warn the vicinity vehicles. The new IEEE 802.11p is being developed based on IEEE 802.11a to address the need for vehicle-to-vehicle and vehicle-to-roadside-unit communication. In this paper, we study the saturation performance of IEEE 802.11 broadcast by developing an analytic model as well as by conducting simulation. Having investigated the literature and studied the features of the broadcast, we point out that the analytic models for IEEE 802.11 unicast cannot be simply applied for broadcast. We construct our model to characterize the operation of the backoff counter in broadcast. Based on solutions to the model, closed form expressions of performance indices including throughput, packet delay, and packet deliver ratio are derived. Numerical results reveal several characteristics of the broadcast service. Our research work provides a new means to approach analysis and enhancement of IEEE 802.11 broadcast performance and reliability in wireless ad hoc networks.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128426472","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: 45
Performance Analysis of Decentralized RAN (Radio Access Network) Discovery Schemes for IEEE 802.21 IEEE 802.21下分散式无线接入网发现方案的性能分析
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.25
Cheoleun Moon, Sookhyun Yang, I. Yeom
{"title":"Performance Analysis of Decentralized RAN (Radio Access Network) Discovery Schemes for IEEE 802.21","authors":"Cheoleun Moon, Sookhyun Yang, I. Yeom","doi":"10.1109/VETECF.2007.25","DOIUrl":"https://doi.org/10.1109/VETECF.2007.25","url":null,"abstract":"As more wireless access networks become available, there is a new challenge emerged: how to discover currently available radio access networks (RANs). To discover available RANs without help from centralized servers, each mobile host periodically turns on network interfaces to discover available networks. Performance of a RAN discovery scheme may depend on how to maintain a valid list of available networks while minimizing power consumption to discover RANs. In this paper, we derive several decentralized RAN discovery schemes. Through extensive simulations, we evaluate them in terms of achieved bandwidth, the number of handovers and power consumption.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127176587","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: 11
A Packet Scheduling Algorithm Using Utility Function for Mixed Services in the Downlink of OFDMA Systems 基于效用函数的OFDMA下行混合业务分组调度算法
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.352
Haipeng Lei, Lei Zhang, Xin Zhang, Dacheng Yang
{"title":"A Packet Scheduling Algorithm Using Utility Function for Mixed Services in the Downlink of OFDMA Systems","authors":"Haipeng Lei, Lei Zhang, Xin Zhang, Dacheng Yang","doi":"10.1109/VETECF.2007.352","DOIUrl":"https://doi.org/10.1109/VETECF.2007.352","url":null,"abstract":"In this paper, we propose a downlink packet scheduling algorithm in OFDMA systems for the mixed services, such as real-time (RT) and non-real-time (NRT) services. The proposed scheduling algorithm is based on the channel state information and utility function of queuing delay. Simulation results show that this algorithm can not only guarantee the fairness and delay requirements of users with different types of services but also obtain good system throughput.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127195945","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: 38
Performance Analysis of Wireless Relaying Networks Using Asymmetric Relay Path 采用非对称中继路径的无线中继网络性能分析
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.31
Sung-Gook Lim, Eunhyun Kwon, Hun-je Yeon, Jaiyong Lee, Mi-Sun Do, R. Taori
{"title":"Performance Analysis of Wireless Relaying Networks Using Asymmetric Relay Path","authors":"Sung-Gook Lim, Eunhyun Kwon, Hun-je Yeon, Jaiyong Lee, Mi-Sun Do, R. Taori","doi":"10.1109/VETECF.2007.31","DOIUrl":"https://doi.org/10.1109/VETECF.2007.31","url":null,"abstract":"In this paper, we present a concept and the related performance analysis for a wireless relay system which counts asymmetric relay path as one of the possible transmission paths. Most approaches of current literature to analyze relay system do not take into account the asymmetric relay path between uplink and downlink transmission. Asymmetric relaying may not be easy to apply to wireless networks but has potential to get more gain via throughput enhancement than symmetric relaying. We derive expression for the total link throughput including both uplink and downlink and verify that asymmetric relaying is valuable.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127360410","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
Exploiting Spectral Reuse in Resource Allocation, Scheduling, and Routing for IEEE 802.16 Mesh Networks IEEE 802.16 Mesh网络资源分配、调度和路由中的频谱复用
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.341
Lien-Wu Chen, Y. Tseng, Da-Wei Wang, Jan-Jan Wu
{"title":"Exploiting Spectral Reuse in Resource Allocation, Scheduling, and Routing for IEEE 802.16 Mesh Networks","authors":"Lien-Wu Chen, Y. Tseng, Da-Wei Wang, Jan-Jan Wu","doi":"10.1109/VETECF.2007.341","DOIUrl":"https://doi.org/10.1109/VETECF.2007.341","url":null,"abstract":"The IEEE 802.16 standard for wireless metropolitan area networks (WMAN) has been created to meet the need of wide-range broadband wireless access at low cost. The objective of this paper is to study how to exploit spectral reuse in an IEEE 802.16 mesh network through timeslot allocation, bandwidth adaptation, hierarchical scheduling, and routing. To the best of our knowledge, this is the first work which formally quantifies spectral reuse in IEEE 802.16 mesh networks and which exploits spectral efficiency under an integrated framework. Simulation results show that the proposed spectral reuse scheduling and load-aware routing significantly enhance the network throughput performance in IEEE 802.16 mesh networks.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132984143","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: 19
On Sum Rate of Multi-User Distributed Antenna System with Circular Antenna Layout 圆形天线布局下多用户分布式天线系统的和速率研究
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.135
Jiansong Gan, Yunzhou Li, Shidong Zhou, Jing Wang
{"title":"On Sum Rate of Multi-User Distributed Antenna System with Circular Antenna Layout","authors":"Jiansong Gan, Yunzhou Li, Shidong Zhou, Jing Wang","doi":"10.1109/VETECF.2007.135","DOIUrl":"https://doi.org/10.1109/VETECF.2007.135","url":null,"abstract":"In this paper, we investigate the uplink of a power- controlled multi-user distributed antenna system (DAS) with antennas deployed on a circle. Applying results from random matrix theory, we prove that the per-user sum rate and the total transmit power both converge as user number and antenna number go to infinity with a constant ratio. The relationship between the asymptotic per-user sum rate and the asymptotic total transmit power is established. We then deal with a typical path loss exponent of 4, present the rate-power relationship in a closed form and find the optimal circle radius for antenna deployment. Simulation results are also provided to demonstrate the validity of our analysis.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131236658","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: 36
Performance of Single-Carrier Frequency-Domain Adaptive Antenna Array 单载波频域自适应天线阵列性能研究
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.114
Byeong-Woo Kang, K. Takeda, F. Adachi
{"title":"Performance of Single-Carrier Frequency-Domain Adaptive Antenna Array","authors":"Byeong-Woo Kang, K. Takeda, F. Adachi","doi":"10.1109/VETECF.2007.114","DOIUrl":"https://doi.org/10.1109/VETECF.2007.114","url":null,"abstract":"The bit error rate (BER) performance of single-carrier (SC) transmission in a frequency-selective fading channel can be significantly improved by using frequency-domain equalization (FDE). In a cellular network, however, the same frequency is reused in different cells to efficiently utilize the limited bandwidth and therefore, the BER performance degrades due to co-channel interference (CCI). Adaptive antenna array (AAA) is one of the well-known techniques to suppress the CCI. In this paper, we consider a frequency-domain AAA, based on the average CCI power minimization criterion, jointly used with FDE and theoretically derive the optimum array weight using Lagrange multiplier method. We evaluate, by the computer simulation, the outage probability of the BER in a frequency-selective CCI environment.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128782933","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
A Practical Timing Recovery Method for OFDM Systems 一种实用的OFDM系统定时恢复方法
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.278
Yeonsu Kang, K. Kang, Do-Seob Ahn
{"title":"A Practical Timing Recovery Method for OFDM Systems","authors":"Yeonsu Kang, K. Kang, Do-Seob Ahn","doi":"10.1109/VETECF.2007.278","DOIUrl":"https://doi.org/10.1109/VETECF.2007.278","url":null,"abstract":"In this paper, we propose a novel timing estimation method for orthogonal frequency division multiplexing (OFDM) systems. Conventional timing synchronization method is useful for only their corresponding preamble structures. The proposed method, however, can be applied to any OFDM systems regardless of preamble structure and remarkably increases in the estimation accuracy of more than 5 dB in terms of the mean square error. The proposed method improves the performance just by novel processing at the receiver instead of designing a new preamble structure.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123181039","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
Optimizing the Date of an Upgrading Investment in a Data Network 优化数据网络升级投资的日期
2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.40
F. Morlot, B. Fourestié, S. Elayoubi
{"title":"Optimizing the Date of an Upgrading Investment in a Data Network","authors":"F. Morlot, B. Fourestié, S. Elayoubi","doi":"10.1109/VETECF.2007.40","DOIUrl":"https://doi.org/10.1109/VETECF.2007.40","url":null,"abstract":"Due to the introduction of new services, the volume of data transferred in mobile networks is rapidly growing and operators periodically face the necessity to upgrade their network. Such upgrades allow them to increase the capacity and provide adequate Quality of Service (QoS). In this paper we propose a general framework for deriving the optimal date for a network upgrade. We show that this date is the result of a compromise between the decrease of upgrade investment cost with time and the loss of profit generated by insufficient capacity. The upgrade should hence be performed when the loss of profit, derived using analytical capacity expressions, exceeds the expected discount. The model presented herein accounts for the randomness of the demand and upgrading cost functions, and results are given for a HSDPA network.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"464 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123376455","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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