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2008 IEEE International Symposium on Wireless Communication Systems最新文献

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Why should multicast be used in WSNs 为什么要在无线传感器网络中使用组播
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726126
Ricardo M. Silva, J. Silva, Milan Simek, F. Boavida
{"title":"Why should multicast be used in WSNs","authors":"Ricardo M. Silva, J. Silva, Milan Simek, F. Boavida","doi":"10.1109/ISWCS.2008.4726126","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726126","url":null,"abstract":"Wireless sensor networks present a great potential in monitoring systems. A vast scope of applications can take advantage of WSNs and, mainly because of their own nature, the aggregation of WSN nodes into groups provides more potential solutions when compared with traditional monitoring systems. This paper introduces the issue of multicast messages and their impact on battery resources of WSNs. It presents a study based on a real implementation to evaluate the energy consumed by each node when a multicast or unicast is used. A study of the multicast impact in the neighbourhood is also presented in this paper.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"250 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127539446","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: 8
Distributed power and topology control for ir-uwb sensor networks 超宽带传感器网络的分布式功率和拓扑控制
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726122
D. Bielefeld, R. Mathar
{"title":"Distributed power and topology control for ir-uwb sensor networks","authors":"D. Bielefeld, R. Mathar","doi":"10.1109/ISWCS.2008.4726122","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726122","url":null,"abstract":"To extend the lifetime of wireless sensor networks a power-aware design of the communication units is required. This can be accomplished by employing power-controllable impulse radio ultra-wideband (IR-UWB) transceivers. In this paper, two distributed power control algorithms are suggested that are based on a variation of IR-UWB specific parameters. The iterative algorithms converge to the optimal transmit power levels for all nodes of a given network topology. The global transmission power can be further reduced by the construction of a network hierarchy. For this purpose a topology control algorithm is proposed that can be combined with the power control procedures. This combination realises an efficient application specific multiple access scheme for IR-UWB sensor networks.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132963261","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
Impact of mobility on the performance of data flows in OFDMA-based IEEE802.16e systems 基于ofdma的IEEE802.16e系统中移动性对数据流性能的影响
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726136
T. Chahed, C. Tarhini
{"title":"Impact of mobility on the performance of data flows in OFDMA-based IEEE802.16e systems","authors":"T. Chahed, C. Tarhini","doi":"10.1109/ISWCS.2008.4726136","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726136","url":null,"abstract":"OFDMA-based IEEE802.16 implements among other features adaptive modulation and coding (AMC) which results in a different bit rate for each user depending on its position in the cell as well as the radio condition it experiences; users away from the base station experience lower throughput. In case of (intra-cell) mobility, the download time for the data user will thus depend on the different locations she or he visits. This in turn impacts the overall (Erlang) capacity of the system defined as the maximum number of users that can be handled simultaneously by the system for a given target blocking probability. This is the focus of the present work where we model the cross-layer capacity of the system under a general user mobility pattern.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126282588","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
Multi-antenna system design for 3GPP LTE 3GPP LTE多天线系统设计
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726102
Amitava Ghosh, W. Xiao, R. Ratasuk, Alan Rottinghaus, B. Classon
{"title":"Multi-antenna system design for 3GPP LTE","authors":"Amitava Ghosh, W. Xiao, R. Ratasuk, Alan Rottinghaus, B. Classon","doi":"10.1109/ISWCS.2008.4726102","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726102","url":null,"abstract":"Standardization work is nearly complete on long term evolution (LTE) of the UMTS Terrestrial Radio Access and Radio Access Network which is aimed for commercial deployment in 2010. Goals for the evolved system include support for improved system capacity and coverage, high peak data rates, low latency, reduced operating costs, multi-antenna support, flexible bandwidth operations and seamless integration with existing systems. To reach these goals, a new design for the air interface including state-of-art multi-antenna technology needs to be deployed. This paper provides a look at different multi-antenna schemes for LTE downlink and uplink. The paper also discusses various Node-B antenna configurations and summarizes the performance of different multi-antenna schemes under various scenarios.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"57 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121009507","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: 10
An energy efficient routing scheme for mobile wireless sensor networks 一种面向移动无线传感器网络的节能路由方案
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726120
L. Nguyen, X. Défago, R. Beuran, Y. Shinoda
{"title":"An energy efficient routing scheme for mobile wireless sensor networks","authors":"L. Nguyen, X. Défago, R. Beuran, Y. Shinoda","doi":"10.1109/ISWCS.2008.4726120","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726120","url":null,"abstract":"Research on wireless sensor networks has recently received much attention as they offer an advantage of monitoring various kinds of environment by sensing physical phenomenon. Among various issues, energy consumption is one of the most important criteria for routing protocol in wireless sensor networks (WSNs). This paper introduces an energy efficient clustering algorithm for mobile sensor network based on the LEACH protocol. The proposed protocol adds feature to LEACH to support for mobile nodes and also reduces the consumption of the network resource in each round. The proposed protocol is simulated and the results show a significant reduction in network energy consumption compared to LEACH.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121501098","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: 143
MMSE channel estimation and time synchronization tracking for cooperative MIMO-OFDM with propagation delay differences 具有传播延迟差异的MIMO-OFDM的MMSE信道估计与时间同步跟踪
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726093
A. Ibing, K. Manolakis
{"title":"MMSE channel estimation and time synchronization tracking for cooperative MIMO-OFDM with propagation delay differences","authors":"A. Ibing, K. Manolakis","doi":"10.1109/ISWCS.2008.4726093","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726093","url":null,"abstract":"We propose a method for concurrent OFDM fine time synchronization to different stations with propagation delay differences, and a receiver based delay difference compensation method for MMSE channel estimation, which are needed to enable cooperative MIMO-OFDM transmission. Cyclic prefix removal is done dynamically with respect to the closest station, which allows for intersymbol interference free reception from all cooperating stations (if cyclic prefix length is adequately chosen). Pilot phase rotations caused by delay differences are compensated to allow for practical MMSE channel estimation with precomputed interpolation matrices. Simulative evaluation is done using 3GPP LTE parameters. Channel estimation mean square error and bit error rate curves show the method able to support cooperative MIMO-OFDM.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"137 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116557125","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
A Bluetooth-based minimum infrastructure home localisation system 基于蓝牙的最低基础设施家庭定位系统
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726134
Damian Kelly, S. McLoone, T. Dishongh
{"title":"A Bluetooth-based minimum infrastructure home localisation system","authors":"Damian Kelly, S. McLoone, T. Dishongh","doi":"10.1109/ISWCS.2008.4726134","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726134","url":null,"abstract":"Indoor location tracking is a function best suited to wireless LAN devices. This generally precludes it from home use in isolated rural areas, where WLAN is a rare commodity. We propose an affordable localisation system which can be implemented using a variety of Bluetooth enabled mobile phones. This permits the incorporation of cellular network signal measurements as well as Bluetooth link measurements into the localisation framework. This paper presents a Hidden Markov Model localisation method, utilising the Viterbi algorithm, which enables single Bluetooth access point localisation. The improvement of accuracy this presents over a Naive Bayes classifier is illustrated, along with the optimal method of obtaining training data.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131763943","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: 17
Mitigating CFO in OFDM systems by exploring the symbol structure 通过探索符号结构来减少OFDM系统中的CFO
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726014
C. Ribeiro, A. Gameiro
{"title":"Mitigating CFO in OFDM systems by exploring the symbol structure","authors":"C. Ribeiro, A. Gameiro","doi":"10.1109/ISWCS.2008.4726014","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726014","url":null,"abstract":"In this paper we revisit the carrier frequency offset (CFO) estimation and removal for broadband orthogonal frequency division multiplexing (OFDM) systems. We propose an algorithm that explores the time-domain (TD) properties of transmitted symbols carrying pilots and data. A careful examination of the components that constitute the TD received symbols leads to the definition of a simple, yet effective, cost function. In a real scenario, the cost function presents a bowl shape with a single global minimum easily identifiable (no local minima). The proposed method is independent of the channel estimation and decision, presenting a very low computational load. The feasibility of the investigated method is substantiated by system simulation using BRAN-A broadband wireless channel model. Simulation results show that the impact of the residual CFO in the system¿s performance is minimal.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127739460","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
Binary tree based public-key management for Mobile Ad Hoc Networks 基于二叉树的移动自组网公钥管理
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726144
G. Kambourakis, Elisavet Konstantinou, S. Gritzalis
{"title":"Binary tree based public-key management for Mobile Ad Hoc Networks","authors":"G. Kambourakis, Elisavet Konstantinou, S. Gritzalis","doi":"10.1109/ISWCS.2008.4726144","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726144","url":null,"abstract":"The establishment of a public key infrastructure (PKI) in mobile ad hoc networks (MANETs) is considered a difficult task because of the intrinsic characteristics of these networks. The absence of centralized services and the possible network partitions make traditional security solutions not straightforwardly applicable in MANETs. In this paper, we propose a public key management scheme based on a binary tree formation of the network¿s nodes. Using the binary tree structure, certificate chains are easily built between communicating nodes that are multi-hops away and the cumbersome problem of certificate chain discovery is avoided. We argue that our mechanism has several advantages over similar solutions, especially when a fair balancing between security and performance is terminus.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132627897","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
UTOSPF: A distributed dynamic route guidance system based on Wireless Sensor Networks and Open Shortest Path First protocol UTOSPF:基于无线传感器网络和开放最短路径优先协议的分布式动态路由引导系统
2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI: 10.1109/ISWCS.2008.4726118
K. Faez, Mohammad Khanjary
{"title":"UTOSPF: A distributed dynamic route guidance system based on Wireless Sensor Networks and Open Shortest Path First protocol","authors":"K. Faez, Mohammad Khanjary","doi":"10.1109/ISWCS.2008.4726118","DOIUrl":"https://doi.org/10.1109/ISWCS.2008.4726118","url":null,"abstract":"Recent advancements in wireless communications and electronics have caused the emergence of a new type of networks called Wireless Sensor Networks (WSNs). WSNs have some unique features such as autonomy, low cost, tiny size, simple and fast deployment and high scalability, and many applications have been forecasted for them. In recent years, many WSN-based applications were proposed for Intelligent Transportation Systems (ITS). In this paper, UTOSPF-Urban Traffic Open Shortest Path First-a novel distributed system based on WSNs and Open Shortest Path First (OSPF) protocol is proposed that collects the real-time traffic information from roads, and based on this information, the optimal routes for every destination will be found and drivers will be informed via Variable Message Signs (VMS) or special transceivers. Fast and low cost deployment, high scalability, autonomy and distributed processing are main features of this system that make it suitable for using in urban environments. Simulation results showed that UTOSPF improve the average speed of vehicles up to 40% as compared to random routes in the simulated scenario.","PeriodicalId":158650,"journal":{"name":"2008 IEEE International Symposium on Wireless Communication Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132239795","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: 17
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