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2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)最新文献

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Parallel Algebraic Approach of BCH Coding in VHDL VHDL中BCH编码的并行代数方法
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.47
L. Cargnini, R. Fagundes, E. Bezerra, G. M. Almeida
{"title":"Parallel Algebraic Approach of BCH Coding in VHDL","authors":"L. Cargnini, R. Fagundes, E. Bezerra, G. M. Almeida","doi":"10.1109/ICCGI.2007.47","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.47","url":null,"abstract":"This work introduces an algebraic approach, using a Hardware Description Language (HDL) and shows that nowadays microelectronics technology could solve algebraic problems that were considered unsolvable using traditional sequential implementation forms as Berlekamp-Massey. An algebraic approach to implement Error Correcting Codes (ECC) is proposed, and implemented using a Hardware Description Language, specifically VHDL. The ECC designed for HDL algebraic implementation is Bose-Chaudhuri-Hocquenghem (BCH), that is one of the most important cyclic block codes. In this research work, we adopted n=63 and k=57, BCH(63,57) an usual configuration in many scientific communication systems as CCSDS telecommand systems of European Space Agency (ESA) and Agenda Espacial Brasileira (AEB). The achieved results clearly shows the main idea in our approach: to prove that an algebraic implementation is a far better approach, leading to an impressive efficiency, and much more suitable than any other sequential algorithm, even then the ones in a hardware version.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114891382","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
Is Current 6to4 Relay Deployment Adequate? 当前的6to4中继部署是否足够?
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.35
M. Domingues, C. Friaças, D. Malone
{"title":"Is Current 6to4 Relay Deployment Adequate?","authors":"M. Domingues, C. Friaças, D. Malone","doi":"10.1109/ICCGI.2007.35","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.35","url":null,"abstract":"6to4 is a mechanism for providing IPv6 connectivity where native IPv6 is still unavailable. 6to4 is based on relay routers deployment. The anycast technique is used to address relays, and each relay's advertisement may be seen globally or only within a limited scope. The number of available relays is important to this mechanism's robustness, as well as their geographic location. Due to the details of the mechanism, limited scope relays are not easy to find, despite the fact their location and existence is key to evaluate suitability of current deployment.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128077058","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
On the Behavior of LMS Adaptive Algorithm in MMSE Receivers for DS-CDMA Systems DS-CDMA系统中LMS自适应算法在MMSE接收机中的行为研究
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.42
C. Paleologu, C. Vladeanu
{"title":"On the Behavior of LMS Adaptive Algorithm in MMSE Receivers for DS-CDMA Systems","authors":"C. Paleologu, C. Vladeanu","doi":"10.1109/ICCGI.2007.42","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.42","url":null,"abstract":"This paper analyzes the behavior of the Least Mean Square (LMS) adaptive algorithm in the minimum mean-squared error (MMSE) single user adaptive receiver for the asynchronous direct sequence-code division multiple access (DS-CDMA) system. It is known that in this context the adaptive algorithm can be iterated several times during the same bit interval in order to achieve a faster convergence rate for the receiver, which further reduces the length of the training sequence. Instead of using such multiple iterations we propose a single equivalent formula for updating the receiver coefficients, saving significant time processing. The simulation results prove the equivalency of these approaches in terms of convergence rate performances.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114602442","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
A User-Centric Model for Supporting Web Services 支持Web服务的以用户为中心的模型
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.9
Jingna Li, Jingsha He
{"title":"A User-Centric Model for Supporting Web Services","authors":"Jingna Li, Jingsha He","doi":"10.1109/ICCGI.2007.9","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.9","url":null,"abstract":"The wide deployment of Web services in wire line and wireless networks has resulted in the proliferation of user identities relying on which the trust between a user and a Web service can be established through identification and authentication. Since user identities normally contain some information concerned with user privacy, sharing of such identity information between Web services should be minimized to preserve user privacy. In this paper, we propose a user-centric trust model for supporting Web services based on the principle of least sharing identity information. This model can be applied to applications in which a user is interacting with multiple Web services simultaneously. We describe this model and show how it can be used as the foundation for developing comprehensive solutions to protect user identities during Web service interactions, thus preserving user privacy.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121786322","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
Scoop: A Complete Methodology for Cooperative Systems Modeling and Analysis 独家:合作系统建模和分析的完整方法论
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.55
David Saint-Voirin, Christophe Lang, Hervé Guyennet
{"title":"Scoop: A Complete Methodology for Cooperative Systems Modeling and Analysis","authors":"David Saint-Voirin, Christophe Lang, Hervé Guyennet","doi":"10.1109/ICCGI.2007.55","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.55","url":null,"abstract":"In this paper, we present our methodology proposal for cooperative remote systems modeling. Its aim is to develop models of existing or planned cooperative systems. These models are used to specify systems or to create dynamic working simulations. Comparative performances are deduced from the latter. The associated meta-model proposal is based, among other things, on the use of multi-agent systems, Petri nets and stochastics Petri nets. After having described the whole methodology concepts, we show a set of general results extracted from simulations.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"85 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127732858","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
Optical CDMA Serial Interference Cancellation: First Cancellation Stage 光CDMA串行干扰消除:第一消除阶段
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.44
E. I. Babekir, N. Elfadel, A. Mohammed, A. Aziz, N. Saad
{"title":"Optical CDMA Serial Interference Cancellation: First Cancellation Stage","authors":"E. I. Babekir, N. Elfadel, A. Mohammed, A. Aziz, N. Saad","doi":"10.1109/ICCGI.2007.44","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.44","url":null,"abstract":"Multiple access interference (MAI) is a primary concern in optical coded division multiple access (OCDMA). To alleviate this issue, first cancellation stage of an optical serial interference cancellation (O-SIC) can be employed. In this paper, we investigate the effect of optical serial interference cancellation for the first cancellation stage on bit error rate (BER). We compare the first cancellation stage with the conventional correlation method by utilizing different threshold values with the various length and different number of users. We have successfully shown that the optical serial interference cancellation yields a better performance than the conventional correlation method by choosing the optimum value in the first cancellation stage. We provide the results of computer simulations showing the BER improvement when the first cancellation stage of optical serial interference cancellation (OP- SIC) is used over the cancellation technique. The comparisons are done for several numbers of users.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123918248","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
Distributed Routing Algorithms in all Optical Multi-Rings Topology Networks 全光多环拓扑网络中的分布式路由算法
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.22
L. Gastal, S. Rousseau
{"title":"Distributed Routing Algorithms in all Optical Multi-Rings Topology Networks","authors":"L. Gastal, S. Rousseau","doi":"10.1109/ICCGI.2007.22","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.22","url":null,"abstract":"This paper investigates the problem of minimizing the worst packet latency and maximizing the ratio of utilization in all-optical multi-rings topologies. The topology is composed of several rings connected through one switch. In this framework, a distributed management protocol as well as a switching protocol are proposed and analyzed along different types of traffic. One of the aims of this framework is to propose a distributed management protocol that controls the access resources and thus the number of packets in nodes. Indeed, simulations results show the variation, in terms of number of packets in buffers, between the proposed protocol and the well known token ring protocol. We first focus on the algorithmic complexity of the related problem in a one ring network. Then, we analyze simulation results provided by the OMnet++ simulator, in terms of packet delay, latency, utilization ratio of the network, and also number of packets in nodes buffer. We compare proposed protocols with the well known token ring protocol giving theoretical analysis and also simulation results.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124726463","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
A Practical Evaluation of the Nautilus6 Operational Home Agent Service 诺第留斯6号可操作家庭代理服务的实际评估
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.7
M. Andre
{"title":"A Practical Evaluation of the Nautilus6 Operational Home Agent Service","authors":"M. Andre","doi":"10.1109/ICCGI.2007.7","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.7","url":null,"abstract":"This paper presents a practical evaluation of the IPv6 mobility service recently opened by the Nautilus6 working group to make the usage of Mobile IPv6 accessible to a wide range of people. The mentioned service also aims at demonstrating by the practice the feasibility of a Mobile IPv6 deployment and thus contributing to the spread of this mobility protocol. The service presented in this paper is structured around three distinct entities: a Home Agent which is the main server for mobility, a web interface to simplify the operations involving the user and a Live CD as an immediate tool to use the service. This paper also introduces the SONAR measurement tool and presents a concrete example of how it can be used to monitor the activity of a Home Agent. Finally this document proposes solutions for a better Mobile IPv6 experience with the latter service, based on the results of an experiment held during a four-day conference.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134021763","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
A Fully Distributed Mechanism for Locating Mobile Agents 一种完全分布式的移动代理定位机制
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.1
P. Flocchini, M. Xie
{"title":"A Fully Distributed Mechanism for Locating Mobile Agents","authors":"P. Flocchini, M. Xie","doi":"10.1109/ICCGI.2007.1","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.1","url":null,"abstract":"In this paper we propose a method based on distributed hashing to locate mobile agents in a system. The strategy is fully distributed, and transparent to the client that is performing the locating request; moreover, it is scalable and efficient. The idea is to treat mobile agents and hosts similarly to the way peers are treated in a Peer-to-peer system, and to implement a lookup protocol that is based on that principle, while taking care of the mobile nature of the agents. We also introduce the notion of Agent Pool, which allows us to reuse mobile agents that might be idle in the system instead of creating new ones at each request.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116129342","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
Wireless Temporal-Spatial Human Mobility Analysis Using Real-Time Three Dimensional Acceleration Data 利用实时三维加速度数据的无线时空人体移动性分析
2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07) Pub Date : 2007-03-04 DOI: 10.1109/ICCGI.2007.65
A. Kalpaxis
{"title":"Wireless Temporal-Spatial Human Mobility Analysis Using Real-Time Three Dimensional Acceleration Data","authors":"A. Kalpaxis","doi":"10.1109/ICCGI.2007.65","DOIUrl":"https://doi.org/10.1109/ICCGI.2007.65","url":null,"abstract":"It is estimated that by the year 2010, the number of people over 65 years of age will reach 39 million. By 2030, that number is expected to over 70 million individuals in the 85 and older age group making them the fastest growing group of older individuals. Their growth rate is three times more than all of the 65 and older age groups put together. Falls and mobility issues are very common among older individuals and can have severe consequences. In older individuals, falls and mobility issues can occur as a result of normal age related changes such as changes in vision, gait, strength, disease progression, and medication. We introduce wireless microcontroller hardware and software that leverages micro electro mechanical system (MEMS) transducers which communicate with a server-based heuristics analytics system. The real-time heuristics analytics system performs correlation analysis which will allow for measuring and detecting of mobility related events correlated with, for example, specific disease progression and/or changes in medication dosing and scheduling. If there is excessive inactivity detected within a selected time period, notification will be sent by the heuristics analytics system to a response center.","PeriodicalId":102568,"journal":{"name":"2007 International Multi-Conference on Computing in the Global Information Technology (ICCGI'07)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126686351","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: 9
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