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2010 International Conference on Broadband, Wireless Computing, Communication and Applications最新文献

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Characteristics of Diffracted Waves Going over Building Rooftop 建筑物屋顶绕射波的特性
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2011-05-25 DOI: 10.1504/IJSSC.2011.040346
Jiro Iwashige, L. Barolli, Katsuki Hayashi
{"title":"Characteristics of Diffracted Waves Going over Building Rooftop","authors":"Jiro Iwashige, L. Barolli, Katsuki Hayashi","doi":"10.1504/IJSSC.2011.040346","DOIUrl":"https://doi.org/10.1504/IJSSC.2011.040346","url":null,"abstract":"In order to have an effective utilization of the radio wave resources, it is important to estimate propagation path in the urban area. In our previous work, we have examined the diffracted fields by two edges with an arbitrary angle which are in different and same heights. In this paper, the characteristics of the diffracted fields by two horizontal edges of a building rooftop are discussed. The numerical calculations are carried out for two wedges of a building rooftop on perfect conductor and concrete wedges. The results show that the waves grazing on the rooftop of concrete building are considerably attenuated for the low concrete conductivity, but when parapets are constructed on the rooftop, the diffracted waves become stronger than the grazing waves.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"57 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132478748","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
Defect Identification by Sensor Network Under Uncertainties 不确定条件下传感器网络缺陷识别
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-11 DOI: 10.1109/BWCCA.2010.64
T. Furukawa, Jinquan Cheng, S. Lim, Fei Xu, R. Shioya
{"title":"Defect Identification by Sensor Network Under Uncertainties","authors":"T. Furukawa, Jinquan Cheng, S. Lim, Fei Xu, R. Shioya","doi":"10.1109/BWCCA.2010.64","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.64","url":null,"abstract":"This paper presents a theoretical framework for identification of defects by a sensor network under uncertainties. While location of sensors are not known due to their inspection due to limited knowledge on the structure to be inspected, existing inspection methods do not take uncertainties of sensor locations into account for the localization of defects. The proposed theoretical framework formulates the uncertainties of sensor states stemming from both motion and measurement and allows stochastic identification of defects using recursive Beyesian estimation. Multi-sensor belief fusion further allows a network of sensors to jointly identify defects and improve the accuracy of identification. Parametric studies and application to practical defect identification have shown the validity of the proposed framework.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123406717","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
Experimental Evaluation of a MANET Testbed in Indoor Stairs Scenarios 室内楼梯场景下MANET试验台的实验评估
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-11 DOI: 10.1109/BWCCA.2010.154
M. Hiyama, Makoto Ikeda, L. Barolli, Elis Kulla, F. Xhafa, A. Durresi
{"title":"Experimental Evaluation of a MANET Testbed in Indoor Stairs Scenarios","authors":"M. Hiyama, Makoto Ikeda, L. Barolli, Elis Kulla, F. Xhafa, A. Durresi","doi":"10.1109/BWCCA.2010.154","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.154","url":null,"abstract":"In recent years, Mobile Ad hoc Networks (MANETs) are continuing to attract the attention for their potential use in several fields. Mobility and the absence of any fixed infrastructure make MANETs very attractive for mobility and rescue operations and time-critical applications. In this paper, we present the implementation and analysis of our implemented MANET testbed considering the Optimized Link State Routing (OLSR) protocol. We consider two models. One when all the nodes are static and another one when one node is moving. The mobile node moves toward the destination at a regular speed and when arrives at the corner of stairs is stops for about three seconds. In this work, we assess the performance of our MANET testbed in terms of throughput and packet loss. From our experiments, we found that the OLSR protocol has a good performance when nodes are in stationary state. However, when the node moves the throughput is decreased. We observed that the number of packet loss increases after 2-hops for static model and after 1-hop for moving model. But, when the node is moving, the packet loss for 2-hops to 4-hops is almost the same.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122476535","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
Gaussian Distributive Filtering in Histogram Equalization 直方图均衡化中的高斯分布滤波
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.129
Ping-Hsien Lin, H. Yen, Chia-Chen Yu
{"title":"Gaussian Distributive Filtering in Histogram Equalization","authors":"Ping-Hsien Lin, H. Yen, Chia-Chen Yu","doi":"10.1109/BWCCA.2010.129","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.129","url":null,"abstract":"Following the rapid advances in digital technologies, more and more consumer electronic devices, such as cell phones and PDAs, are equipped with built-in camera modules. In order to be cost-effective, optoelectronics components used in such devices are usually not sophisticated enough to support professional photographing. Pictures taken by such devices tend to be of unsatisfiable quality under poor shooting conditions, and post-processing becomes very useful in improving the quality of such images. Among various post-processing techniques of digital images, histogram equalization performs contrast adjustment of an image by evenly distributing its brightness values. In digital images, however, the phenomenon of ``quantization'' prevents ideal equalization of the histogram. To compensate for such drawback, we propose a technique named Gaussian Distributive Filter to serve as a post-enhancement method for histogram equalization techniques to fine-tune the histogram of an image. Experimental results show our proposed technique to be promising.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114968613","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
Evaluation of a Fuzzy-Based CAC Scheme for Different Priorities in Wireless Cellular Networks 无线蜂窝网络中基于模糊的不同优先级CAC方案的评价
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.143
Taku Ikebata, Gjergji Mino, L. Barolli, F. Xhafa, A. Durresi, A. Koyama
{"title":"Evaluation of a Fuzzy-Based CAC Scheme for Different Priorities in Wireless Cellular Networks","authors":"Taku Ikebata, Gjergji Mino, L. Barolli, F. Xhafa, A. Durresi, A. Koyama","doi":"10.1109/BWCCA.2010.143","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.143","url":null,"abstract":"Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning. However, the decision for CAC is very challenging issue due to user mobility, limited radio spectrum, and multimedia traffic characteristics. We proposed a fuzzy-based CAC system by considering the priority of the on-going connections. We called this system FACS-P. In FACSP, as priority parameter, we considered only one parameter (service request). In our previous work, we extend our work by adding different priorities. We call this system FACS-MP. In this paper, we evaluate by simulations the performance of the proposed system. From the simulations results, we conclude that the FACS-MP make a good differentiation of different services and has better behaviour than FACS-P.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115774635","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
Advanced Design Issues for OASIS Network-on-Chip Architecture OASIS片上网络架构的高级设计问题
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.51
Kenichi Mori, Adam Esch, B. Abderazek, Kenichi Kuroda
{"title":"Advanced Design Issues for OASIS Network-on-Chip Architecture","authors":"Kenichi Mori, Adam Esch, B. Abderazek, Kenichi Kuroda","doi":"10.1109/BWCCA.2010.51","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.51","url":null,"abstract":"Network-on-Chip (NoC) architectures provide a good way of realizing efficient interconnections and largely alleviate the limitations of bus-based solutions. NoC has emerged as a solution to problems exhibited by the shared bus communication approach in System-On-Chip (SoC) implementations including lack of scalability, clock skew, lack of support for concurrent communication and power consumption. The communication requirement of this paradigm is affected by architecture parameters such as topology, routing, buffer size etc. In this paper, we propose advanced optimization techniques for OASIS NoC, a NoC we previously designed. We describe the architecture and the novel optimization techniques in details. Hardware complexity and preliminary performance results are also given.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"335 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120939577","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: 26
Phase Error Cancellation for OFDM Systems Using Adaptive Filters 基于自适应滤波器的OFDM系统相位误差消除
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.148
Chia-Hsin Cheng, Kai-Jie Chen, Gwo-Ruey Lee, Yung-Fa Huang
{"title":"Phase Error Cancellation for OFDM Systems Using Adaptive Filters","authors":"Chia-Hsin Cheng, Kai-Jie Chen, Gwo-Ruey Lee, Yung-Fa Huang","doi":"10.1109/BWCCA.2010.148","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.148","url":null,"abstract":"Orthogonal Frequency Division Multi-plexing (OFDM) is a significant technology to provide a high-rate wireless transmissions. In this paper, a scheme called as a step size delta - least mean square (SSD-LMS) is used for phase error cancellation. The results show that SSD-LMS algorithm can provide a rapid convergence with a low steady-state fluctuation error than that with the conventional LMS algorithm.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123787156","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
Received Signal Strength Technique Performance in Sensor Network Localization Application 接收信号强度技术在传感器网络定位中的应用
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.96
Kazim Firat Taraktas, O. Ceylan, H. B. Yagci
{"title":"Received Signal Strength Technique Performance in Sensor Network Localization Application","authors":"Kazim Firat Taraktas, O. Ceylan, H. B. Yagci","doi":"10.1109/BWCCA.2010.96","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.96","url":null,"abstract":"In this paper, we initially present RSSI vs Distance test results performed indoor and outdoor with Texas Instruments CC2431 Development Kit. In addition, Location Engine of Development Kit performance is presented with 3 and 4 reference nodes. An alternative algorithm based on Cayley-Menger Determinant, proposed by M.Cao, B.D.O. Anderson and A.S. Morse has been implemented in Matlab and it is compared with Location Engine. It is concluded that accuracy of alternative one slightly better than Location Engine with 3 reference nodes. Increasing reference node count makes Location Engine more accurate.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129258810","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
Contract Signatures in E-Commerce Applications 电子商务应用中的合同签署
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.101
L. Harn, Chu-Hsing Lin, Che-Wei Hu
{"title":"Contract Signatures in E-Commerce Applications","authors":"L. Harn, Chu-Hsing Lin, Che-Wei Hu","doi":"10.1109/BWCCA.2010.101","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.101","url":null,"abstract":"In this paper, we propose a notion of contract signatures used in e-commerce applications. This scheme adopts digital multi-signature scheme in public-key cryptography to facilitate fair signature exchange over network. Security proof under the random oracle model of this modified signature scheme is include. This proposed solution allows two parties to produce and exchange two ambiguous signatures which are fully ambiguous for any third party (i.e. 1 out ambiguity). The combination of these two ambiguous signatures forms the contract signature. There is no “keystone” (i.e. a secret key used in the concurrent signature) of the signature. In case anyone releases the contract signature to a verifier, both signers bind to the contract signature.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129636711","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
Fault Tolerant Methods for Intermitted Failures in Virtual Large Scale Disks 虚拟大规模磁盘中间断故障的容错方法
2010 International Conference on Broadband, Wireless Computing, Communication and Applications Pub Date : 2010-11-04 DOI: 10.1109/BWCCA.2010.75
M. Uehara
{"title":"Fault Tolerant Methods for Intermitted Failures in Virtual Large Scale Disks","authors":"M. Uehara","doi":"10.1109/BWCCA.2010.75","DOIUrl":"https://doi.org/10.1109/BWCCA.2010.75","url":null,"abstract":"Recently, the demand of low cost large scale storages increases. We developed VLSD (Virtual Large Scale Disks) toolkit for constructing virtual disk based distributed storages, which aggregate free spaces of individual disks. However, current implementation of VLSD can mask only stop failure but cannot mask other kinds of failures such as intermitted failure. In this paper, we introduce two classes to VLSD in order to increase the intermitted fault tolerance. One is Retry Disk which retries to read/write at failures, another is VotedRAID1 which masks failures by majority voting. In this paper, we describe these classes in detail and evaluate their fault tolerance.","PeriodicalId":196401,"journal":{"name":"2010 International Conference on Broadband, Wireless Computing, Communication and Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121853075","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
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