2010 Sixth Advanced International Conference on Telecommunications最新文献_第9页

Differentiation between Different Traffic Categories Using Multi-level of Priority in DCF-WLAN DCF-WLAN中使用多级优先级区分不同的流量分类

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.50

M. Ahmed, Gamal Abdel Fadeel, I. I. Ibrahim

引用次数: 10

Collaborative Learning in OpenSim by Utilizing SLoodle 基于SLoodle的OpenSim协同学习

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.75

A. Konstantinidis, T. Tsiatsos, S. Demetriadis, A. Pomportsis

引用次数: 54

Security in OPERA Specification Based PLC Systems 基于OPERA规范的PLC系统安全性

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.26

G. Corral, J. Selga, A. Zaballos, David González-Tarragó, L. M. Torres, Berthold Haberler

引用次数: 2

Using Matrix Convolutions and Clustering for Energy Efficient Routing Algorithm in Sensor Networks 基于矩阵卷积和聚类的传感器网络节能路由算法

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.18

Yaser A. Yousef, Marc Gilg, P. Lorenz

引用次数: 3

Decision Support for the Usage of Multicast versus Unicast in Broadband TV Networks 宽带电视网络中多播与单播的决策支持

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.57

Alireza Abdollahpouri, B. Wolfinger

{"title":"Decision Support for the Usage of Multicast versus Unicast in Broadband TV Networks","authors":"Alireza Abdollahpouri, B. Wolfinger","doi":"10.1109/AICT.2010.57","DOIUrl":"https://doi.org/10.1109/AICT.2010.57","url":null,"abstract":"Internet Protocol Television (IPTV) is undoubtedly a killer application and when offered via wireless networks, it paves the way for quad-play in next generation networks. It has been argued for a long time that the popularity of TV channels can be modeled quite realistically using a Zipf-like distribution in which the top 10% of channels account for nearly 90% of viewers. Therefore, most channels are unpopular or rarely watched and it is not efficient to multicast a channel as long as there are less than a given number of viewers tuned into it. The interesting question arises at which bound multicast and unicast channels should be separated. In this article, we want to first introduce a performance criterion, called multicast gain, which can be used for computing multicast efficiency. Based on the measured gain, we define a threshold in order to identify cases in which unicasting might be a better choice. We show that although multicasting can usually outperform multiple unicasting in terms of bandwidth usage, due to the inherent overhead in establishing and maintaining multicast connections, in special cases, using multiple unicast flows can be preferable.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128624823","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

Cooperative Agent Based Vertical Handover Scheme for Heterogeneous Networks 基于协作代理的异构网络垂直切换方案

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.43

Atiq Ahmed, L. Merghem, D. Gaïti

引用次数: 15

Spectral Enhancement of Whispered Speech Based on Probability Mass Function 基于概率质量函数的低声语音频谱增强

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.47

H. Sharifzadeh, I. Mcloughlin, Farzaneh Ahmadi

{"title":"Spectral Enhancement of Whispered Speech Based on Probability Mass Function","authors":"H. Sharifzadeh, I. Mcloughlin, Farzaneh Ahmadi","doi":"10.1109/AICT.2010.47","DOIUrl":"https://doi.org/10.1109/AICT.2010.47","url":null,"abstract":"Whispered speech can be effectively used for quiet and private communications over mobile phones and is also the communication means for ENT patients under a regime of voice rest. The reconstruction of natural sounding speech from such whispers can be useful for several types of application across different scientific fields ranging from communications to biomedical engineering. Despite the useful applications for a such technology, the reconstruction of natural speech from whispers has received relatively little research effort to date. This paper presents novel methods for spectral enhancement and formant smoothing with the aim of attaining more natural sounding speech within the reconstruction process. The proposed approach uses a probability mass-density function to identify a reliable formant trajectory through whispers and apply vocal modifications accordingly. Subjective evaluation experiments were performed, and are reported, to assess the performance of the techniques. A method for the near real-time conversion of whispers to normal phonated speech through a modified CELP codec has been discussed in our previously published work which, the proposed formant modification approach in this paper builds upon.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127757423","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

Collateral Damage in the Last Big Internet Storm 上一场互联网大风暴的附带损害

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.16

P. Gutiérrez

{"title":"Collateral Damage in the Last Big Internet Storm","authors":"P. Gutiérrez","doi":"10.1109/AICT.2010.16","DOIUrl":"https://doi.org/10.1109/AICT.2010.16","url":null,"abstract":"The Internet is in a transition phase. Migrating to IPv6 is currently the centre of many studies, since the IPv4 address space exhaustion is starting to be noticeable by facts like the slowdown in the growth of the IPv4 routing table. Another less advertised but equally important challenge for the Internet is the exhaustion of the current 16 bit Autonomous System Numbers. The solution adopted by the IETF has to introduce 32-bit Autonomous System Numbers in order to get a reasonable breathing space. This implies another transition process, which is less public because it has no direct impact on the end users. But this process is not being as smooth as many people would desire and is at the root of several routing storms, which have lately shaken the Internet. This paper analyses the last Internet routing storm, which occurred on August, 2009 from a location which is geographically and topographically distant from the storm's textit{epicentre}. The data captured by RIPE'S BGP probes at the London Internet Exchange are decomposed for this study and the traffic profiles of the different probes is analysed separately. This study looks at traces produced by BGP-4 traffic engineering techniques based on changes in the ASPATH attribute and discovers one probe which mainly collected traffic which was induced by a change in the ASPATH prepending behaviour of a neighbouring Autonomous System.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121791574","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

Link Quality and Local Load Balancing Routing Mechanisms in Wireless Sensor Networks 无线传感器网络中的链路质量和本地负载均衡路由机制

2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.27

C. Diallo, M. Marot, M. Becker

{"title":"Link Quality and Local Load Balancing Routing Mechanisms in Wireless Sensor Networks","authors":"C. Diallo, M. Marot, M. Becker","doi":"10.1109/AICT.2010.27","DOIUrl":"https://doi.org/10.1109/AICT.2010.27","url":null,"abstract":"The choice of a routing protocol in a wireless sensor network (WSN) depends on the nature of the application and on its primary mission. Lot of works addressed the problem of routing mechanisms with more or less effectiveness, some of which pointed out the use of the link quality indicator (LQI) as a route selection criterion (metric). In a previous work, following an experimental study, we have shown [1], under some conditions, the inefficiency of the LQI based routing. In this paper, we propose a simple way, to improve reliability and efficiency of the LQI based routing in WSN. We also evaluate other route selection criteria including the \"remaining energy level\" and the \"sensor proximity with respect to the Base Station (BS)\". The proposed local load balancing routing protocol is aimed to help source nodes to exploit potential capabilities of their respective neighbors without having any knowledge of their properties such as the position or the energy level. Simulation results show that our adaptation of the LQI metric is among the best route selection criteria regardless of the performance criterion under consideration, and that the load balancing significantly improves the routing efficiency by lengthening the network lifetime while minimizing packet losses.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133233190","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: 29