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2008 Fourth Advanced International Conference on Telecommunications最新文献

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MPLS Based Mobility Model for 3G/WLAN Integrated Networks and Its Performance Evaluation 基于MPLS的3G/WLAN综合网络移动性模型及其性能评价
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.61
C. Pani, I. S. Misra
{"title":"MPLS Based Mobility Model for 3G/WLAN Integrated Networks and Its Performance Evaluation","authors":"C. Pani, I. S. Misra","doi":"10.1109/AICT.2008.61","DOIUrl":"https://doi.org/10.1109/AICT.2008.61","url":null,"abstract":"In this paper, MPLS based mobility management is proposed by enabling HMPv6/MPLS in 3G/WLAN integrated framework. We develop an analytical model to evaluate registration update cost, network throughput and average packet transmission delay inside and outside the hierarchical domain for the proposed structure. Numerical results show that our proposed mobility management mechanism can significantly reduce average packet transmission delay with slight higher overhead in handoff sensitive environment. We compare our result with other mobile IP based protocol like MIPv4, MIPv6 and H-MPLS for performance evaluation.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"28 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":"126103042","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
Cross-Layer Protocol Design of a 3G-RNC Simulator 3G-RNC模拟器的跨层协议设计
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.14
G. Tselikis
{"title":"Cross-Layer Protocol Design of a 3G-RNC Simulator","authors":"G. Tselikis","doi":"10.1109/AICT.2008.14","DOIUrl":"https://doi.org/10.1109/AICT.2008.14","url":null,"abstract":"Layering is the dominating design methodology of communication protocol stacks. This architecture is characterized by a stack of protocol layers where each protocol undertakes specific tasks by using the services made available by the layers below it, and providing new services to upper layers. However, by retaining the strictly modular architecture, where each layer keeps its independence and communicates solely with its adjacent layers, the implementation of the protocol stack may have a negative impact on the system performance. Recently, the cross-layer design has been introduced. This paper presents the reference architecture of a commercial 3G radio network controller (RNC) simulator based on cross-layer design done by actively exploiting the dependence between protocol layers to obtain performance gains.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"5 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":"125241272","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
Asymptotic Approximation of the Probability Density Function of the Nonlinear Phase Noise Using the Method of Steepest Descent 用最陡下降法逼近非线性相位噪声的概率密度函数
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.66
V. Vgenopoulou, I. Roudas, K. Ho, I. Chochliouros, G. Agapiou, T. Doukoglou
{"title":"Asymptotic Approximation of the Probability Density Function of the Nonlinear Phase Noise Using the Method of Steepest Descent","authors":"V. Vgenopoulou, I. Roudas, K. Ho, I. Chochliouros, G. Agapiou, T. Doukoglou","doi":"10.1109/AICT.2008.66","DOIUrl":"https://doi.org/10.1109/AICT.2008.66","url":null,"abstract":"Fiber-optic communication systems using phase shift keying (PSK) modulation may suffer from nonlinear phase noise. In this paper, an asymptotic approximation of the probability density function (p.d.f.) of the normalized nonlinear phase noise is derived by taking the inverse Laplace transform of its moment generating function and using the method of steepest descent. For comparison, the inverse Laplace transform of the moment generating function is also numerically evaluated using numerical quadrature. Comparison of the analytical and numerical results, for specific examples, indicates that the method of steepest descent is more accurate and, therefore, is preferable for semi-analytical calculations of the error probability.","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":"117067253","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
End-User Driven Service Creation for Converged Service of Telecom and Internet 终端用户驱动的电信与互联网融合服务创新
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.39
Young-Suk Shin, Cho-rong Yu, Seunghwa Chung, Sangki Kim
{"title":"End-User Driven Service Creation for Converged Service of Telecom and Internet","authors":"Young-Suk Shin, Cho-rong Yu, Seunghwa Chung, Sangki Kim","doi":"10.1109/AICT.2008.39","DOIUrl":"https://doi.org/10.1109/AICT.2008.39","url":null,"abstract":"Convergence and user-centricity are the leading trends in telecom network. The service creation scheme is changing to realize these trends. This paper describes the end-user driven service creation method for converged service over telecom and Internet domain. The proposed SCE fulfills the general SCE requirements and also comes up with the network trend to user-centricity and the network evolution towards convergence. The advantage of our approach comes from web based service creation and execution environment to satisfy end-user's requirements and encourage user's participation. Using our SCE, end- users can create their own service applications and use them anytime and anywhere through their personal devices.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"50 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":"124022962","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: 16
Bit Loss Probability versus Loss Probability in the Admission Control Process of Non-Elastic Traffic Sources 非弹性流量源准入控制过程中的比特丢失概率与丢失概率
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.34
L. Ioan, Grazziela Niculescu
{"title":"Bit Loss Probability versus Loss Probability in the Admission Control Process of Non-Elastic Traffic Sources","authors":"L. Ioan, Grazziela Niculescu","doi":"10.1109/AICT.2008.34","DOIUrl":"https://doi.org/10.1109/AICT.2008.34","url":null,"abstract":"Admission control is one of the key functions performed by the management of services and network resources in order to guarantee the QoS requirements of different types of traffic flows. In the case of non-elastic traffic streams, the admission control is typically based on a formula derived by assuming that the traffic aggregate may be approximated by a Gaussian distribution and considering the loss probability, i.e. the buffer overflow probability, as the QoS parameter. In this paper we consider an alternative QoS parameter that is the bit loss probability that is the long term proportion of lost bits, which is more related to the current measurements (e.g. throughput or packet loss rate) than the loss probability. Therefore, we derive an appropriate computational formula for the effective bandwidth which, as numerical results show, is more accurate and, consequently, assures a more efficient admission control mechanism.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"47 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":"132260965","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
Towards High Quality VoIP in 3G Networks - An Empirical Study 面向3G网络的高质量VoIP——实证研究
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.59
Andres Arjona, C. Westphal, Antti Ylä-Jääski, M. Kristensson
{"title":"Towards High Quality VoIP in 3G Networks - An Empirical Study","authors":"Andres Arjona, C. Westphal, Antti Ylä-Jääski, M. Kristensson","doi":"10.1109/AICT.2008.59","DOIUrl":"https://doi.org/10.1109/AICT.2008.59","url":null,"abstract":"Third generation (3G) packet switched WCDMA networks with high-speed downlink packet access (HSPDA) are currently being deployed worldwide to provide wireless broadband connectivity. When introducing HSDPA in 3G networks the end user experience and system capacity with voice over IP applications improve considerably. When later on adding also high-speed packet uplink access (HSUPA), the system capacity and end user experience will improve even further. This paper analyzes with measurements the VoIP quality over current Release 5 HSDPA networks. The results show that even though the introduction of HSDPA significantly reduces the user-to-user voice delay, the performance is satisfactory only for selected devices, the overall end user experience is still significantly worse than with circuit switched solutions and not acceptable. The current limitations with VoIP in HSDPA networks with a too large delay can be improved by using the RLC UNACK mode, potentially decreasing the jitter buffer size and reducing the terminal processing delay. In the longer term, HSUPA and several features in 3GPP Release 7 standards will bring further performance improvements in both user plane latency and system capacity.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"523 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120976164","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: 21
Information Theoretic Uplink Capacity of the Linear Cellular Array 线性蜂窝阵列的信息理论上行容量
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.35
S. Chatzinotas, M. Imran, C. Tzaras
{"title":"Information Theoretic Uplink Capacity of the Linear Cellular Array","authors":"S. Chatzinotas, M. Imran, C. Tzaras","doi":"10.1109/AICT.2008.35","DOIUrl":"https://doi.org/10.1109/AICT.2008.35","url":null,"abstract":"In the information-theoretic literature, Wyner's model has been the starting point for studying the capacity limits of cellular systems. This simple cellular model was adopted and extended by researchers in order to incorporate flat fading and path loss. However, the majority of these extensions preserved a fundamental assumption of Wyner's model, namely the collocation of User Terminals (UTs). In this paper, we alleviate this assumption and we evaluate the effect of user distribution on the sum-rate capacity. In this context, we show that the effect of user distribution is only considerable in low cell-density systems and we argue that \"collocated\" models can be utilized to approximate the \"distributed\" ones in the high cell-density regime. Subsequently, we provide closed forms for the calculation of the interference factors of \"collocated\" models given the system parameters. In addition, the asymptotics of the per-cell sum-rate capacity are investigated. Finally, the presented results are interpreted in the context of practical cellular systems using appropriate figures of merit.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"111 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":"121326165","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
Dimensioning of Optical Networks with Incomplete Information 不完全信息光网络的维数问题
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.27
C. Pavan, R. Morais, A. R. Correia, A. Pinto
{"title":"Dimensioning of Optical Networks with Incomplete Information","authors":"C. Pavan, R. Morais, A. R. Correia, A. Pinto","doi":"10.1109/AICT.2008.27","DOIUrl":"https://doi.org/10.1109/AICT.2008.27","url":null,"abstract":"We perform the dimensioning of a set of realistic optical networks with and without knowledge of the network topology. Results are compared regarding transmission systems and bandwidth management costs, and the average error is calculated. We found that the lack of information about the network topology does not penalize substantially the accuracy of the results.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"76 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":"125957219","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
Performance Assessment for the Selection Transmit Diversity in Adaptive Polarized MIMO Pre-RAKE System 自适应极化MIMO预rake系统选择发射分集性能评估
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.15
J. Halim, H. El-Badawy, H. El-Hennawy
{"title":"Performance Assessment for the Selection Transmit Diversity in Adaptive Polarized MIMO Pre-RAKE System","authors":"J. Halim, H. El-Badawy, H. El-Hennawy","doi":"10.1109/AICT.2008.15","DOIUrl":"https://doi.org/10.1109/AICT.2008.15","url":null,"abstract":"This paper evaluates the performance of the Selection Transmit Diversity (STD) technique in adaptive Polarized Multiple-Input Multiple-Output (MIMO) Pre-RAKE system. The proposed system will be examined in Frequency Division Duplex (FDD) mode. For the same spatial dimensions, the proposed system will be compared with the Pre/Post RAKE systems and the single-polarization Pre-RAKE STD systems. As will be shown, our system can achieve a much better performance in addition to simplify the receiver's implementation. Also, the system performance will be investigated in case of excluding the cross-pol Pre-RAKEs in the base station. The paper discusses the effect of the polarization diversity characteristics as well as the impact of the imbalance in the co-polarized power intensities on the BER performance. For slowly-varying channels, an assessment for the system performance will be investigated under different Feedback Information (FBI) rates. In addition, a performance comparison for vehicular and pedestrian environments will be presented.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"33 3 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":"134521453","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 New Method to Measure the Jitter of a Signal 一种测量信号抖动的新方法
2008 Fourth Advanced International Conference on Telecommunications Pub Date : 2008-06-08 DOI: 10.1109/AICT.2008.78
A. Reis, J. F. Rocha, A. Gameiro, J. P. Carvalho
{"title":"A New Method to Measure the Jitter of a Signal","authors":"A. Reis, J. F. Rocha, A. Gameiro, J. P. Carvalho","doi":"10.1109/AICT.2008.78","DOIUrl":"https://doi.org/10.1109/AICT.2008.78","url":null,"abstract":"In this paper, we present a new method to measure the jitter caused by noise in a communication system. First, we show some conventional jitter measurers and after we present the new proposed method. We will test the new jitter measurer on the analog PLL (phase lock loop). The objective is to show that the results measured by the new process are correct, rigorous and coherent with the well known theoretical and experimental values.","PeriodicalId":105735,"journal":{"name":"2008 Fourth Advanced International Conference on Telecommunications","volume":"21 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":"116756379","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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