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The Second International Conference on Communications and Networking最新文献

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Performance of Closed Form and Iterative MU-MIMO precoders for different broadcast channel configurations 封闭形式和迭代MU-MIMO预编码器在不同广播信道配置下的性能
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699809
Mustapha Amara, Y. Yuan-Wu, D. Slock
{"title":"Performance of Closed Form and Iterative MU-MIMO precoders for different broadcast channel configurations","authors":"Mustapha Amara, Y. Yuan-Wu, D. Slock","doi":"10.1109/COMNET.2010.5699809","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699809","url":null,"abstract":"We investigate in this paper the performance achieved by some SDMA (Space Division Multiple Access) access techniques in a Broadcast channel configuration. The study includes the two basic linear precoding schemes present in the literature namely the CF (Closed Form) and the Iterative precoding techniques. These techniques have already been widely studied for the i.i.d Rayleigh channel. In fact, these precoding methods are essentially based on the exploitation of diversity created by multipaths present in such a channel to enhance the beamforming design and consequently increase the SINR (Signal to Interference and Noise Ratio) for each user. In this work the impact of a reduction of these degrees of freedom has been investigated through simulations under other channel configurations. The obtained results demonstrate that these precoding techniques remain efficient only for systems offering high number of degrees of freedom and fail when a direct LOS (Line Of Sight) is present limiting the achievable Sum Rate (SR) of the system. The obtained results have also been compared to the TDMA (Time Division Multiple Access) communication mode.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127872430","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
Resource allocation of OFDMA based cognitive radio systems under partial channel state information and raw sensing information 部分信道状态信息和原始感知信息下基于OFDMA的认知无线电系统资源分配
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699805
Rahma Bouraoui, S. Najeh, Hichem Besbes
{"title":"Resource allocation of OFDMA based cognitive radio systems under partial channel state information and raw sensing information","authors":"Rahma Bouraoui, S. Najeh, Hichem Besbes","doi":"10.1109/COMNET.2010.5699805","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699805","url":null,"abstract":"1 Cognitive radio is an emerging research topic aiming to improve spectrum usage. This paper deals with resource allocation problem in OFDMA cognitive radio systems. Previous research that has dealt with this problem assume perfect knowledge of the channel state information (CSI) and few works consider the quality of the spectrum sensing in the resource allocation issue. The proposed approach combines both partial CSI and raw sensing information (RSI), in order to offer a better compromise between the throughput and the quality of service (QoS) of the secondary system. The proposed algorithm is a sub-optimal low complex algorithm based on two steps. Simulations were drawn to evaluate the performance of this algorithm in terms of achievable data rate, power consumption, generated interference and QoS of the secondary users.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130383262","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
Multicarrier equalization by subchannel SINR maximization 子信道信噪比最大化的多载波均衡
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699818
E. Ben Salem, Hichem Besbes, S. Cherif, Roberto López-Valcarce
{"title":"Multicarrier equalization by subchannel SINR maximization","authors":"E. Ben Salem, Hichem Besbes, S. Cherif, Roberto López-Valcarce","doi":"10.1109/COMNET.2010.5699818","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699818","url":null,"abstract":"1 In multicarrier (MC) communication receivers, the use of a time-domain equalizer (TEQ) mitigates inter-symbol and inter-carrier interferences by shortening the overall channel delay spread. Nevertheless, the TEQ-based MC-receiver structure does not result in optimal bit rate and if one wants to optimize the bit rate a nonlinear cost function has to be maximized. Hence, to optimize the MC system bit rate, we aim to equalize each subchannel separately by maximizing its Signal-to-Interference and Noise Ratio (SINR). The proposed approach is based on exact and accurate model of the subchannel SINR. Optimal equalizers are then designed in the case of ADSL environment where numerical simulation confirms the improvement in performance of the proposed approach with respect to previous methods.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131973009","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
Outage capacity of bidirectional relaying in cognitive relay networks 认知中继网络中双向中继的中断容量
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699819
A. A. Alkheir, Zied Bouida, K. Qaraqe, M. Ibnkahla
{"title":"Outage capacity of bidirectional relaying in cognitive relay networks","authors":"A. A. Alkheir, Zied Bouida, K. Qaraqe, M. Ibnkahla","doi":"10.1109/COMNET.2010.5699819","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699819","url":null,"abstract":"This article studies the outage capacity of bidirectional relaying using Decode and Forward (DF) in cognitive relay networks. We consider a communication system where two sources attempt to exchange their messages through a set of cognitive relay nodes. Only relays with successful decoding and spectrum acquisition are allowed to participate in the broadcast phase (BC). We consider two schemes for selecting the relays in the BC phase. In the first scheme, successfully decoding at least one of the two signals allows a relay to participate, while the second scheme requires successful decoding of both signals for a relay to participate. Simulation results illustrate the performance advantage of the first scheme for low SNR values. Furthermore, we use high SNR approximations in deriving closed from expressions for the outage capacity.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122853563","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
XPACML eXtensible Privacy Access Control Markup Langua 可扩展隐私访问控制标记语言
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699807
K. Bekara, Yosra Ben Mustapha, M. Laurent
{"title":"XPACML eXtensible Privacy Access Control Markup Langua","authors":"K. Bekara, Yosra Ben Mustapha, M. Laurent","doi":"10.1109/COMNET.2010.5699807","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699807","url":null,"abstract":"Privacy in the digital world is a critical problem which is becoming even more imperious with the growth of the Internet, accompanied by the proliferation of e-services (e.g. e-commerce, e-health). One research track for efficient privacy management is to make use of user's and service provider's (SP) privacy policies, and to perform an automatic comparison in between to help any (skilled or unskilled) users preserving their privacy.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131740873","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: 17
Cooperative ARQ protocols for dual-hop systems 双跳系统的协同ARQ协议
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699811
Maymouna Ben Said, H. Boujemaa
{"title":"Cooperative ARQ protocols for dual-hop systems","authors":"Maymouna Ben Said, H. Boujemaa","doi":"10.1109/COMNET.2010.5699811","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699811","url":null,"abstract":"In this paper, we analyze the performance of a cooperative ARQ protocol in terms of throughput efficiency over a dual-hop Rayleigh fading channel. Three basic ARQ strategies are considered, the stop and wait, the go back N and the selective repeat. Two relaying methods are discussed: amplify and forward (AF) versus decode and forward (DF). Finally, simulation results are provided to validate our analysis.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122565870","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
Performance improvement of CSMA/CA for data gathering scenarios in wireless sensor networks 无线传感器网络数据采集场景下CSMA/CA的性能改进
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699821
B. Nefzi, Yeqiong Song
{"title":"Performance improvement of CSMA/CA for data gathering scenarios in wireless sensor networks","authors":"B. Nefzi, Yeqiong Song","doi":"10.1109/COMNET.2010.5699821","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699821","url":null,"abstract":"This article addresses the problem of performance degradation of wireless sensor networks for scenarios involving data gathering to a small number of node sinks; as the data travel toward a sink, its neighbor nodes experience high loads and congestion. Using CSMA/CA as the basic access protocol, we implemented CoSenS, a collecting and sending burst scheme, on the top of it to address these issues. The idea of CoSenS is that a router does not retransmit packets as they arrive. Instead, it collects data from its children and other neighbor routers and then sends them into a burst during a period of time that we call transmission period. The performance analysis shows that, as the load increases, our scheme maximizes the throughput and successful transmission rates while minimizing the end-to-end delay compared to CSMA/CA.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129928731","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
Ethernet Congestion Manager characteristics, calibration and analysis 以太网拥塞管理器的特点，校准和分析
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699703
Hela Mliki, L. Kamoun, L. Chaari
{"title":"Ethernet Congestion Manager characteristics, calibration and analysis","authors":"Hela Mliki, L. Kamoun, L. Chaari","doi":"10.1109/COMNET.2010.5699703","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699703","url":null,"abstract":"Following the dominance of Ethernet in local area, campus and enterprise network, efforts are in progress in the Institute of Electrical and Electronics Engineers (IEEE), the Metro Ethernet Forum (MEF), and the International Telecommunication Union (ITU) to extend Ethernet into metro networks [11]. The major challenge for deploying this technology in metro networks and Wide Area Network (WAN) is to guarantee the Quality of services (QOS) [1]. Nevertheless, congestion problems can be harmful to QoS. Actually, networks are increasing in size and complexity and new network services are deployed, the management becomes more complex and congestion can become a serious problem. Congestion control mechanisms control congestion in nodes which suffer from lack of resources. Congestion control mechanisms have to be complying with IEEE802.1 specifications. Our investigation will be concentrated on ECM (Ethernet Congestion Manager) mechanism. We have studied ECM algorithm, we have suggested some scenarios and tests then based on simulations results ECM performance analysis are deduced.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134259892","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
Data traffic performance model for cellular networks 蜂窝网络的数据流量性能模型
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699822
H. Dahmouni, H. El Ghazi, Sandrine Vaton
{"title":"Data traffic performance model for cellular networks","authors":"H. Dahmouni, H. El Ghazi, Sandrine Vaton","doi":"10.1109/COMNET.2010.5699822","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699822","url":null,"abstract":"Most of current cellular networks are designed for transmitting packet data and voice services. Several types of traffic such as voice, WAP, Web, FTP and E-mail with different ON/OFF distributions have to be supported by these networks. It is therefore important to know their performance in such systems. In this paper we develop a performance analytical model which takes into account the different types of traffic and a finite number of users generating ON/OFF sessions in a cell. In particular it takes into account the realistic behavior of the user when he generates finite length sessions. The main contribution of this work is the presentation of performance model based on Continuous-Time Markov Chains (CTMC) which their insensitivity is proved analytically. The closed form formula deduced from the model is used to evaluate the various parameters of quality of service, such as, the radio resource utilization, the average throughput and the blocking probability.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"14 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130871549","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
A novel reservation approach for TDMA-based Ad hoc networks 一种新的基于tdma的Ad hoc网络预约方法
The Second International Conference on Communications and Networking Pub Date : 2010-11-01 DOI: 10.1109/COMNET.2010.5699827
Jihen Bokri, Sofiane Ouni, F. Kamoun
{"title":"A novel reservation approach for TDMA-based Ad hoc networks","authors":"Jihen Bokri, Sofiane Ouni, F. Kamoun","doi":"10.1109/COMNET.2010.5699827","DOIUrl":"https://doi.org/10.1109/COMNET.2010.5699827","url":null,"abstract":"Providing Quality of Service in the Ad hoc networks is one of the topics that have received a lot of attention recently. The most common QoS solution presented in the literature is the reservation method. It consists of making resources reservation for the flows which have QoS requirements. In this paper, we propose a novel reservation approach for the TDMA-based Ad hoc networks. Our proposal is based on decreasing the bandwidth consumption by omitting the control phase from the habitual TDMA (Time Division Multiple Access) frame structure. Furthermore, our reservation approach deals with the mobility issue by differentiating the reservations in the two-hop neighboring. We have compared our approach to the existing reservation protocols and the results have demonstrated that our method can reduce the end-to-end delay as well as the amount of control messages.","PeriodicalId":444734,"journal":{"name":"The Second International Conference on Communications and Networking","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115946867","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
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