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2008 Fourth Advanced International Conference on Telecommunications最新文献

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Next Generation Network Related Standardization - Enablers for the Convergence 下一代网络相关标准化——融合的推动者
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.68
T. Väärämäki, J. Puttonen, G. Fekete
{"title":"Next Generation Network Related Standardization - Enablers for the Convergence","authors":"T. Väärämäki, J. Puttonen, G. Fekete","doi":"10.1109/AICT.2008.68","DOIUrl":"https://doi.org/10.1109/AICT.2008.68","url":null,"abstract":"In this article we present the on-going standardization work related to the next generation network (NGN) standardization. Several standardization organizations are working on different aspects of NGN, such as Internet Engineering Task Force (IETF), Institute of Electrical and Electronics Engineers (IEEE) and 3rd Generation Partnership Project. We present the current work and status of each standardization organizations and provide a use-case type example of the use, benefits and relations of the NGN research. To achieve the visions of next generation networks presented by e.g. International Telecommunication Union (ITU) an efficient usage of the upcoming standards as well as coordination between standardization bodies are needed.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133174225","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
A Technique for Blind Identification of Uplink Signals in Multibeam Smart Antenna 一种多波束智能天线上行信号盲识别技术
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.26
Qinghua Chen, Xianzhong Xie
{"title":"A Technique for Blind Identification of Uplink Signals in Multibeam Smart Antenna","authors":"Qinghua Chen, Xianzhong Xie","doi":"10.1109/AICT.2008.26","DOIUrl":"https://doi.org/10.1109/AICT.2008.26","url":null,"abstract":"In this paper, we construct signal modelings of four types of signals in wireless communication, i.e. single user single antenna signal, virtual MIMO signal, multibeam smart antenna signal and single user MIMO signal first , based on the model, propose a technique for blind identification of uplink signals in multibeam smart antenna by combining MUSIC algorithm with forward-backward spatial smoothing algorithm to blindly estimate DOAs of these four types of signals, when the source signal is one of the four types. Simulation results show the feasibility of this technique. This paper has important value in both theory and application, especially in noncooperation communication environment.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128823977","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
BER and Complexity Comparisons of the MPIC Receiver and the Linear Chip Equalizer MPIC接收机与线性芯片均衡器的误码率和复杂度比较
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.37
Aymen Ayari, H. Boujemaa, M. Siala
{"title":"BER and Complexity Comparisons of the MPIC Receiver and the Linear Chip Equalizer","authors":"Aymen Ayari, H. Boujemaa, M. Siala","doi":"10.1109/AICT.2008.37","DOIUrl":"https://doi.org/10.1109/AICT.2008.37","url":null,"abstract":"The introduction of multimedia and Internet services in UMTS universal mobile telecommunication system\", is the origin of emergence of packet-access mode HSDPA high speed downlink packet access\". This evolution will permit the transmission of data with packet mode at 10 Mb/s. In such a context, the quality of the transmission is degraded due to inter symbol interference, inter channel interference and the proximity of the constellation points. In order to improve the quality of service in HSDPA, it is necessary to reduce the inter symbol and inter channel interferences. In the setting of this work we compare between complexity and performances of two HSDPA receiver, MPIC receiver and linear chip equalizer. This study, shows that the complexity of MPIC depends of number of stages, correlators and paths and the complexity of linear chip equalizer depend on the length of the global channel.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128375874","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
GEAP: A Fault Management Scheme in Optical Networks GEAP:一种光网络故障管理方案
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.64
A. Souza, A. S. S. Vieira, Jéssyca Alencar L. e Silva, A. L. B. P. Barros, G. Campos, J. Celestino, L. Mendouga
{"title":"GEAP: A Fault Management Scheme in Optical Networks","authors":"A. Souza, A. S. S. Vieira, Jéssyca Alencar L. e Silva, A. L. B. P. Barros, G. Campos, J. Celestino, L. Mendouga","doi":"10.1109/AICT.2008.64","DOIUrl":"https://doi.org/10.1109/AICT.2008.64","url":null,"abstract":"One of the ways to offer QoS in optical networks, in a policy-based environment, is to use route protection policies. For each signed contract, the network administrator defines the type of protection (1:1, 1+1 or l:n) through service classes (gold, silver, bronze). However, the pre-planned backup routes can be inadequate to guarantee the SLA (service level agreement). In case of failure, there is no way to guarantee that the choosen protection route will meet the client requirements. In this paper, a method for choosing the best backup route is proposed through genetic algorithms and PBM, called GEAP.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129594895","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
Improvement of WDM Transmission Perfromance by Enhancement of Signal Detection 通过增强信号检测来提高WDM传输性能
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.65
A. Alhabsi, H. Bourdoucen
{"title":"Improvement of WDM Transmission Perfromance by Enhancement of Signal Detection","authors":"A. Alhabsi, H. Bourdoucen","doi":"10.1109/AICT.2008.65","DOIUrl":"https://doi.org/10.1109/AICT.2008.65","url":null,"abstract":"In this paper, effect of enhancing signal detection on improving WDM transmission performance is considered. This has been shown for systems operating at 10 Gbps with a nonreturn-to-zero (NRZ) modulation format. The transmission system has been built using standard transmitters and receivers operating at wavelength of 1550 nm with a standard single mode fiber. Performance of improved detected signal has been evaluated via the analysis of quality factor obtained from the detected eye diagrams and the computation of bit error rate. Numerical simulations have shown a noticeable improvement of the system bit error rate (BER) after a post processing operation on the received signal. An average factor around 30% increase in the fiber span for a BER 10\" is reported. This improvement will allow fiber spans to increase, diminish the amount of repeaters used and thus reduce the cost of transmission systems.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122520469","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 Reactive Tunneling (RT) Scheme to Improve Handover Latency over the Mobile Network Environment 一种改进移动网络环境下切换延迟的响应隧道(RT)方案
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.43
Chung-Ming Huang, Meng-Shu Chiang, Tz-Heng Hsu
{"title":"A Reactive Tunneling (RT) Scheme to Improve Handover Latency over the Mobile Network Environment","authors":"Chung-Ming Huang, Meng-Shu Chiang, Tz-Heng Hsu","doi":"10.1109/AICT.2008.43","DOIUrl":"https://doi.org/10.1109/AICT.2008.43","url":null,"abstract":"In the fast handover scheme, MN can prepare for handover when the current link is not broken. Obtaining a new care-of-address (CoA) and building a tunnel for packet forwarding make the fast handover scheme be able to reduce packet loss and handover latency. However, the performance of the fast handover scheme will be downgraded if a MN fails to finish the handover preparation before it disconnects. In this paper, we propose a reactive tunneling (RT) scheme to resolve the aforementioned problems. In the proposed RT scheme, MN can obtain a new Co A in advance and a tunnel is built with less overhead. As a result, the performance of fast handover scheme can be improved.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133956578","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: 6
On the Handoff-Call Blocking Probability Calculation in W-CDMA Cellular Networks W-CDMA蜂窝网络中切换-呼叫阻塞概率的计算
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.36
V. Vassilakis, G. Kallos, I. Moscholios, M. Logothetis
{"title":"On the Handoff-Call Blocking Probability Calculation in W-CDMA Cellular Networks","authors":"V. Vassilakis, G. Kallos, I. Moscholios, M. Logothetis","doi":"10.1109/AICT.2008.36","DOIUrl":"https://doi.org/10.1109/AICT.2008.36","url":null,"abstract":"In this paper, we investigate the call blocking probability calculations in the uplink of W-CDMA mobile cellular networks. In these networks, we distinguish two types of blocking, the new-call blocking, which concerns the initial call establishment request, and the handoffcall blocking, due to the users' mobility from one cell to the other. To analyze the system, we describe it by a Discrete Time Markov Chain, and based on it, we derive a recursive formula for the calculation of the state probabilities. Consequently, the new-call blocking probabilities and the handoffcall blocking probabilities are determined. To evaluate the proposed formulas, the analytical results are compared with simulation results. This comparison shows that the accuracy of the proposed formulas is very satisfactory.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114634717","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: 15
On Trustworthy Reputation Evidence Establishment: Rating Analysis and Defense against Dishonesty 诚信信誉证据的建立:评级分析与失信防范
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.38
Chunmei Gui, Quanyuan Wu, Huaimin Wang, Jian Qiang
{"title":"On Trustworthy Reputation Evidence Establishment: Rating Analysis and Defense against Dishonesty","authors":"Chunmei Gui, Quanyuan Wu, Huaimin Wang, Jian Qiang","doi":"10.1109/AICT.2008.38","DOIUrl":"https://doi.org/10.1109/AICT.2008.38","url":null,"abstract":"The guarantee of high trustworthiness holds the balance for secure sharing and efficient collaboration among entities in wide distributed, dynamic domain. Recently, most papers elaborate on architectures or mechanisms for designing reputation service and resource selection. The presence of inaccurate testimonies and malicious referrers is necessary to be considered. Based on D-S evidence theory, guided by rating reliability in psychology, the proposed approach can filter out dishonest feedbacks and respects entity's rating habits at the same time. Experiments show the cost of calculation is low. It is apt to deploy in open environment and will be effective after short time of training.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128510330","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
Attaching an IMS Subscriber to an Unknown Foreign Network 将IMS用户连接到未知的外部网络
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.10
Seppo Heikkinen
{"title":"Attaching an IMS Subscriber to an Unknown Foreign Network","authors":"Seppo Heikkinen","doi":"10.1109/AICT.2008.10","DOIUrl":"https://doi.org/10.1109/AICT.2008.10","url":null,"abstract":"The networking landscape is about to change. The multitude of different kind of operators and access networks can provide access at any time irrespective of location. However, it will be less likely that every player has pre-established relationships with all the parties. Thus, there is a need for measures that allow the users to securely connect to previously unknown networks and still have the assurance of the home network for the service provisioning. In this paper we describe an architecture, which aims to secure the initial connectivity and the interaction between the involved parties by employing cryptographic identities in a roaming scenario, where the access and home operator have no pre-established agreement. It also allows the operators to take advantage of their existing multimedia service provisioning infrastructures, such as IMS.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124615433","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
An Infrastructure of Programmable Networks for Peer-to-Peer Applications 点对点应用的可编程网络基础结构
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.12
A. R. Cardoso, A. Serhrouchni, E. Donato, J. Celestino, M. Salaün
{"title":"An Infrastructure of Programmable Networks for Peer-to-Peer Applications","authors":"A. R. Cardoso, A. Serhrouchni, E. Donato, J. Celestino, M. Salaün","doi":"10.1109/AICT.2008.12","DOIUrl":"https://doi.org/10.1109/AICT.2008.12","url":null,"abstract":"Although peer-to-peer (P2P) and programmable networks have their particularities, both work with distributed systems. In this article, a new concept looks for the integration among P2P and programmable networks. The originality of this work lives in the total convergence of networks P2P and programmable networks, with the objective of rendering service providers the ability to quickly create and provide new and customized services in response to market demand. Programmable networks as infrastructure for P2P traffic identification and optimization are considered and examples like file push and the management of joining/leaving peers highlight the usefulness of this proposal in the solution of traffic challenges.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121307219","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
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