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2010 17th International Conference on Telecommunications最新文献

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New method for GPRS cellular network traces exploitation GPRS蜂窝网络线路开发的新方法
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478797
Aymen Ayari, M. Ayadi, H. Khedher, S. Tabbane
{"title":"New method for GPRS cellular network traces exploitation","authors":"Aymen Ayari, M. Ayadi, H. Khedher, S. Tabbane","doi":"10.1109/ICTEL.2010.5478797","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478797","url":null,"abstract":"In the idea to create a realistic model of mobility and traffic for the networks of 3rd and 4th generation, we have studied many techniques of modeling and planning. Our choice was for the real network traces exploitation techniques, mainly because compared to other techniques this technique is very adapted to the real modeling. Although this technique is most convenient, it has many disadvantages. From this context, was born the aim of this work which consists in the creation of a new method which can investigate on mobile network traces based on Data Mining. These new methods permit us to investigate on data GPRS network traces and extract a very significant population for the study, modeling and planning existent and new network.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"78 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120926098","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
Power allocation strategies across N orthogonal channels for singe-relay networks at both source and relay 单中继网络中N个正交信道的功率分配策略
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478874
Y. Ko, M. Ardakani, S. Vorobyov
{"title":"Power allocation strategies across N orthogonal channels for singe-relay networks at both source and relay","authors":"Y. Ko, M. Ardakani, S. Vorobyov","doi":"10.1109/ICTEL.2010.5478874","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478874","url":null,"abstract":"We consider a wireless relay network with one source, one relay and one destination, where communications between nodes are preformed over N orthogonal channels. This, for example, is the case when orthogonal frequency division multiplexing is employed for data communications. Since the power available at the source and relay is limited, we study optimal power allocation strategies at the source and relay in order to maximize the overall source-destination capacity. Depending on the availability of the channel state information at both the source and relay or only at the relay, power allocation is performed at both the source and relay or only at the relay. Considering different setups for the problem, various optimization problems are formulated and solved. Some properties of the optimal solution are also proved.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130718078","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
Flow-based path selection for Internet traffic engineering with NSGA-II 基于NSGA-II的互联网流量工程流路径选择
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478839
El-Sayed M. El-Alfy
{"title":"Flow-based path selection for Internet traffic engineering with NSGA-II","authors":"El-Sayed M. El-Alfy","doi":"10.1109/ICTEL.2010.5478839","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478839","url":null,"abstract":"Traffic engineering has become an important issue in Internet operation due to the fast growing of the Internet traffic and the stringent requirements of quality-of-service over the limited available resources. This problem is a multicriteria optimization problem in nature and our goal in this paper is to explore the application of NSGA-II, an evolutionary algorithm for multiobjective optimization, for determining the optimal distribution of traffic demands over the network. The problem is first formulated as a multiobjective constrained optimization problem which is NP-hard. Then, a hybrid heuristic algorithm based on of linear programming and NSGA-II is developed for approximating the optimal Pareto front. We compare the performance of the proposed heuristic using a 10-node problem adopted from the literature with the exact solutions generated using a lexicographic Chebyshev method.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132758097","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
Performance of early retransmission scheme in streaming media 流媒体中早期重传方案的性能
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478842
Zhiyuan Yin, H. Alnuweiri, A. Reddy
{"title":"Performance of early retransmission scheme in streaming media","authors":"Zhiyuan Yin, H. Alnuweiri, A. Reddy","doi":"10.1109/ICTEL.2010.5478842","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478842","url":null,"abstract":"In this paper, we propose a new variant of TCP with an early retransmission scheme as an enhancement to make it more suitable for streaming media. We call this new protocol TCP-ER. We performed extensive ns2 simulations to show that: 1) The early retransmission scheme can considerably reduce the number of retransmission timeouts and packet delay jitter in a variety of network environments. 2) TCP-ER has a higher throughput in severely congested network conditions whereas stays relatively fair with typical TCP implementations(specifically TCP-SACK) as congestion gets alleviated. 3) Under same network conditions, constrained streaming over TCP-ER has a considerably lower number of late packets than its normal TCP counterpart.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131025756","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
Performance analysis of cooperative diversity networks with imperfect channel estimation over Rician fading channels 不完全信道估计下的合作分集网络性能分析
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478643
S. Ikki, M. F. Feteiha, M. Uysal
{"title":"Performance analysis of cooperative diversity networks with imperfect channel estimation over Rician fading channels","authors":"S. Ikki, M. F. Feteiha, M. Uysal","doi":"10.1109/ICTEL.2010.5478643","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478643","url":null,"abstract":"In this paper, we examine the effect of channel estimation error on the error and outage probabilities of a multi-relay system with amplify-and-forward relaying over frequency-flat Rician fading channel. We consider orthogonal relaying and study both conventional cooperative systems (i.e., all relays participate in the relaying phase) and opportunistic cooperative systems (i.e., only the best relay participates in the relaying phase). Based on the derivation of effective signal-to-ratio (SNR) at the receiver taking into account channel estimation error, we obtain closed-form expressions for error and outage probabilities in high SNR regime. Such closed form solutions are highly desirable because they allow for rapid and efficient evaluation of system performance. Computer simulations are used to validate our analytical results.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133821362","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
BER analysis of optical wireless signals through lognormal fading channels with perfect CSI 具有完美CSI的对数正态衰落信道中无线光信号的误码率分析
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478870
H. Moradi, Maryam Falahpour, H. Refai, P. Lopresti, Mohammed Atiquzzaman
{"title":"BER analysis of optical wireless signals through lognormal fading channels with perfect CSI","authors":"H. Moradi, Maryam Falahpour, H. Refai, P. Lopresti, Mohammed Atiquzzaman","doi":"10.1109/ICTEL.2010.5478870","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478870","url":null,"abstract":"Due to inconsistent atmospheric conditions, scattering and scintillation of free space optical (FSO) signal can occur, thus negatively influencing the received signal intensity. The channel is usually modeled as a normalized fading coefficient with additive Gaussian noise. Optimal detection of the received signal is designed based on a decision rule, e.g., Maximum Likelihood (ML), assuming the receiver knows the noise statistics and fading correlation of the channel. This paper briefly deals with analysis on bit error rate (BER) of a wireless optical signal passing through a lognormally distributed fading channel, when perfect knowledge of channel state information (CSI) at the receiver side is available. Two approaches will be presented to provide closed-form expressions for BER. One uses Gauss-Hermite quadrature approximation and the other one is based on power series. While numerical analysis shows a very small approximation error when the Gauss-Hermite approach is considered, the power series approach does not uses any approximation.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133093207","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
Closed-Form expressions for the capacity of spectrum-sharing constrained relaying systems 频谱共享约束中继系统容量的封闭表达式
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478821
Kais Ben Fredj, Leila Musavian, S. Aïssa
{"title":"Closed-Form expressions for the capacity of spectrum-sharing constrained relaying systems","authors":"Kais Ben Fredj, Leila Musavian, S. Aïssa","doi":"10.1109/ICTEL.2010.5478821","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478821","url":null,"abstract":"Capacity of relay-based systems under spectrumsharing constraints is studied in this paper. We consider that a secondary user (SU) is allowed to use the spectrum band allocated to a primary user (PU) as long as the former meets the interference-power requirements of the latter so that it does not disrupt the PU's communication process. We assume that the direct link between the SU's sender and destination is in deep fade and that data is transmitted through the help of a dedicated relaying device. Closed-form expressions for the ergodic and outage capacities are derived for different fading and shadowing environments. Numerical results corroborating the analysis are also provided.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"489 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131814572","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
Blind channel equalization in GI-less OFDM systems using property restoral 基于属性恢复的无gi OFDM系统盲信道均衡
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478829
F. O. Alayyan, R. Shubair, A. Zoubir, Y. Leung
{"title":"Blind channel equalization in GI-less OFDM systems using property restoral","authors":"F. O. Alayyan, R. Shubair, A. Zoubir, Y. Leung","doi":"10.1109/ICTEL.2010.5478829","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478829","url":null,"abstract":"We introduce a new low complexity equalizer for Orthogonal Frequency Division Multiplexing systems with virtual carriers. The proposed equalizer utilizes the existing redundancy in the frequency domain to completely eliminate the effects of inter-symbol-interference. We prove the usage of frequency domain redundancy is effective to extract the transmitted signals.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133864387","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
Jointly optimized heterogeneous MIMO broadcast systems 联合优化异构MIMO广播系统
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478759
W. Mesbah, H. Alnuweiri
{"title":"Jointly optimized heterogeneous MIMO broadcast systems","authors":"W. Mesbah, H. Alnuweiri","doi":"10.1109/ICTEL.2010.5478759","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478759","url":null,"abstract":"A heterogeneous multiple-input-multiple-output (MIMO) broadcast (BC) system is considered, with some of the users having target-rate requirements while other users are working with best-effort data rates. We assume the use of dirty paper coding, and we exploit the duality between the capacity regions of the multiple access and broadcast channels in order to optimally and jointly optimize the rates, powers and decoding order. We use the concept of stream achievable rate region (rather than user achievable rate region) and show that the best-effort users can achieve higher rates when the data streams of any user are not restricted to be decoded consecutively and when timesharing between different decoding orders is allowed. It is shown that the problem can be formulated as a convex optimization problem. We also propose an algorithm to obtain the time-sharing factors and decoding orders (corner points) required to achieve the optimal solution.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"114 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133969478","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
Link adaptation design for interfering cognitive radio with QoS constraints 具有QoS约束的干扰认知无线电链路自适应设计
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478785
M. Taki, F. Lahouti
{"title":"Link adaptation design for interfering cognitive radio with QoS constraints","authors":"M. Taki, F. Lahouti","doi":"10.1109/ICTEL.2010.5478785","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478785","url":null,"abstract":"In this paper, we consider a primary and a cognitive user transmitting over a wireless fading interference channel. Both primary and cognitive links are subject to delay-QoS constraints. The achievable throughput subject to a given delay-QoS constraint can be quantified as the effective capacity of a link. We consider a system in which the primary user transmits with a constant power and utilizes an adaptive modulation and coding (AMC) scheme subject to its required bit error rate (BER). A link (power and rate) adaptation scheme is proposed for the interfering cognitive radio to maximize its effective capacity, while a minimum required effective capacity for the primary user is provisioned. A BER performance requirement and a power constraint are also considered for the cognitive radio. The resulting problem is then cast as a nonlinear discrete optimization problem for which a fast and efficient suboptimum solution is presented. Comparisons with the scheduled (non-interfering) adaptive cognitive transmission demonstrate the efficiency of the proposed interfering transmission scheme.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133388490","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
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