2010 IEEE Globecom Workshops最新文献_第8页

Link adaptation for parallel channels with encoder rate and modem symbol rate constraints 具有编码器速率和调制解调器符号速率约束的并行信道链路自适应

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700084

Y. Tang, M. Brandt-Pearce, S. Wilson

引用次数: 1

Chained Turbo Equalization for SC-FDMA Systems without Cyclic Prefix 无循环前缀SC-FDMA系统的链式Turbo均衡

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700151

Hui Zhou, K. Anwar, T. Matsumoto

引用次数: 7

Using broadcast to protect user privacy in location-based applications 在基于位置的应用程序中使用广播来保护用户隐私

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700201

Fuyu Liu, G. Hamza-Lup, K. Hua

{"title":"Using broadcast to protect user privacy in location-based applications","authors":"Fuyu Liu, G. Hamza-Lup, K. Hua","doi":"10.1109/GLOCOMW.2010.5700201","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2010.5700201","url":null,"abstract":"Most existing cloaking techniques are based on a three-tier architecture: mobile users, a trusted anonymizer server, and service providers. In this paper, we propose a new three-tier architecture, where the trusted anonymizer server also serves as a broadcast server. The trusted anonymizer server takes a proactive approach. It first groups mobile users into clusters. Then for each cluster, it fetches the most popular query results from service providers. The query results are then broadcast through an air channel to reach all mobile users. As a result, to get a query answered, a mobile user can first tune into the air channel to determine if the query result is available. If not, the mobile user just sends a traditional location-based query to the trusted anonymizer server. Other than the novel new three-tier architecture, we also propose two cell-based clustering algorithms, and a broadcast index to facilitate the download of query results. The proposed techniques are compared using simulation against the improved Interval Cloak technique under the traditional three-tier architecture. The extensive results show that our system is better in reducing communication cost and protecting user privacy.","PeriodicalId":232205,"journal":{"name":"2010 IEEE Globecom Workshops","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116265849","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

An RFID based system for digital investigation in Vehicular Adhoc Networks 基于RFID的车载自组织网络数字调查系统

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700103

Bayrem Triki, S. Rekhis, N. Boudriga

引用次数: 0

Exploiting super peers for large-scale peer-to-peer Wi-Fi roaming 利用超级对等体实现大规模点对点Wi-Fi漫游

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700292

Efstratios G. Dimopoulos, P. A. Frangoudis, George C. Polyzos

{"title":"Exploiting super peers for large-scale peer-to-peer Wi-Fi roaming","authors":"Efstratios G. Dimopoulos, P. A. Frangoudis, George C. Polyzos","doi":"10.1109/GLOCOMW.2010.5700292","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2010.5700292","url":null,"abstract":"With the low installation and maintenance cost of IEEE 802.11-based equipment, dense Wi-Fi deployments are a reality, especially in today's urban areas. This vast number of WLANs can be exploited to achieve low-cost ubiquitous wireless Internet access, which is also demostrated by the emergence of community-based wireless access schemes. In our prior work we have developed a reciprocity-based peer-to-peer architecture for Wi-Fi sharing, where peers provide free Wi-Fi access to others in order to enjoy the same benefit when they are away from their own Wi-Fi network. Our system tries to match peer consumption with contribution and we have shown it to work well for city-scale Wi-Fi sharing communities. However, when attempting to roam outside the city boundaries, the statistics are such that there is typically a lack of consumption-contribution information between consuming and providing members, which hinders the system's scalability. In this work, we extend our architecture with global-scale roaming capabilities by relaxing the requirement for full decentralization. In particular, we exploit special trusted super-peers which act as representatives of different Wi-Fi sharing communities (e.g., communities of different geographical regions) and which mediate transactions when there is insufficient information about peer contribution history. Extensive simulations show that this super-peer-assisted approach can significantly enhance the system's performance in terms of roaming coverage.","PeriodicalId":232205,"journal":{"name":"2010 IEEE Globecom Workshops","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124957068","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

Proactive fault management based on risk-augmented routing 基于风险增强路由的主动故障管理

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700366

Bruno Vidalenc, L. Ciavaglia

引用次数: 6

Analyzing implicit group messaging: A novel messaging paradigm for group-oriented content distribution 分析隐式组消息传递:面向组的内容分发的一种新的消息传递范式

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700191

Neil Cowzer, P. Nixon

引用次数: 0

Autonomic mobility and resource management over an integrated wireless environment — A GANA oriented architecture 集成无线环境中的自主移动性和资源管理——面向加纳的体系结构

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700379

G. Aristomenopoulos, T. Kastrinogiannis, Z. Li, M. Wilson, M. G. Juan, A. Jose, Y. Li, V. Kaldanis, S. Papavassiliou

引用次数: 8

On the cost of supporting mobility and multihoming 关于支持移动性和多址的成本

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700332

Vatche Isahagian, I. Matta, J. Akinwumi

引用次数: 11

Joint channel estimation and equalization for OFDM based broadband communications in rapidly varying mobile channels 快速变化移动信道中基于OFDM的宽带通信联合信道估计与均衡

2010 IEEE Globecom Workshops Pub Date : 2010-12-01 DOI: 10.1109/GLOCOMW.2010.5700420

H. Şenol, E. Panayirci, H. Poor

{"title":"Joint channel estimation and equalization for OFDM based broadband communications in rapidly varying mobile channels","authors":"H. Şenol, E. Panayirci, H. Poor","doi":"10.1109/GLOCOMW.2010.5700420","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2010.5700420","url":null,"abstract":"This paper is concerned with the challenging and timely problem of channel estimation for orthogonal frequency division multiplexing (OFDM) systems in the presence of frequency selective and very rapidly time varying channels. In OFDM systems operating over rapidly time-varying channels, the orthogonality between subcarriers is destroyed leading to inter-carrier interference (ICI) and resulting in an irreducible error floor. The band-limited, discrete cosine serial expansion of low-dimensionality is employed to represent the time-varying channel. In this way, the resulting reduced dimensional channel coefficients are estimated iteratively with tractable complexity and independently of the channel statistics. The algorithm is based on the expectation maximization-maximum a posteriori probability (EM-MAP) technique leading to a receiver structure that also yields the equalized output using the channel estimates. The pilot symbols are employed to estimate the initial coefficients effectively and unknown data symbols are averaged out in the algorithm in a non-data-aided fashion. It is shown that the computational complexity of the proposed algorithm to estimate the channel coefficients and to generate the equalized output as a by-product is ≃ O(N) per detected symbol, N being the number of OFDM subcarriers. Computational complexity as well as computer simulations carried out for the systems described in WiMAX and LTE standards indicate that it has significant performance and complexity advantages over existing suboptimal channel estimation and equalization algorithms proposed earlier in the literature.","PeriodicalId":232205,"journal":{"name":"2010 IEEE Globecom Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125526543","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