Third International Conference on Communications and Networking最新文献

An empirical analysis of the impact of RSS to distance mapping on localization in WSNs RSS距离映射对WSNs定位影响的实证分析

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217729

A. Koubâa, M. B. Jamaa, Amjaad Alhaqbani

引用次数: 9

A novel user scheduling strategy for grouped subcarriers in MIMO-OFDM system MIMO-OFDM系统中一种新的分组子载波用户调度策略

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217726

S. Rahima, N. Hamdi

引用次数: 0

Energy consumption analysis to predict the lifetime of IEEE 802.15.4 wireless sensor networks 用于预测IEEE 802.15.4无线传感器网络寿命的能耗分析

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217732

Zayneb Trabelsi Ayoub, Sofiane Ouni, F. Kamoun

引用次数: 10

Performance study of a reduced complexity time synchronization approach for OFDM systems OFDM系统低复杂度时间同步方法的性能研究

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217742

Leila Nasraoui, L. N. Atallah, M. Siala

{"title":"Performance study of a reduced complexity time synchronization approach for OFDM systems","authors":"Leila Nasraoui, L. N. Atallah, M. Siala","doi":"10.1109/ComNet.2012.6217742","DOIUrl":"https://doi.org/10.1109/ComNet.2012.6217742","url":null,"abstract":"This paper presents a performance analysis of a recently proposed preamble based reduced complexity two-stage synchronization technique. The preamble, composed of two identical sub-sequences, is first used to determine an uncertainty interval based on Cox and Schmidl algorithm. Then, a differential correlation is carried using a new sub-sequence obtained by element wise multiplication of the preamble sub-sequence and a shifted version of it. This second step is exploited to fine tune the coarse estimate by carrying the differential correlation over the uncertainty interval. We here study the effect of the training sequence choice on the synchronization performance in the general case of multipath channels. We also discuss some complexity issues compared to previously proposed algorithms. We show that the frame start detection is greatly sensitive to the training sequence class and choice. Computational load evaluation ensure that the reduced complexity approach, which was found to provide almost equal performance to those obtained by higher complexity algorithms in [10, 11], has much lower complexity load comparable to that of simple sliding correlation based approaches. To further reduce the computational load, an optimal choice of the uncertainty interval, used in the fine stage, can also be adapted to the operating SNR.","PeriodicalId":296060,"journal":{"name":"Third International Conference on Communications and Networking","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123236173","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

Analytical analysis of applying aggregation with fragment retransmission on IEEE 802.11e EDCA network in saturated conditions 饱和条件下IEEE 802.11e EDCA网络中应用分片重传聚合的分析分析

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217730

Emna Charfi, L. Chaari, L. Kamoun

引用次数: 3

Performance optimization of amplify-and-forward relaying schemes for uplink OFDMA communications 上行OFDMA通信放大转发中继方案的性能优化

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217741

Naoufel Debbabi, I. Kammoun, M. Siala

{"title":"Performance optimization of amplify-and-forward relaying schemes for uplink OFDMA communications","authors":"Naoufel Debbabi, I. Kammoun, M. Siala","doi":"10.1109/ComNet.2012.6217741","DOIUrl":"https://doi.org/10.1109/ComNet.2012.6217741","url":null,"abstract":"Cooperative communication is a promising technique to enhance the system performance by exploiting the spatial diversity provided by the relay use. Incremental relaying techniques are proposed to limit the resources use to only bad channel conditions. In this paper, we deal with AF and IAF performance optimization for uplink Orthogonal Frequency Division Multiple Access (OFDMA) communications, carried on a packet-per-packet basis. For OFDMA cellular system, we define a cost that reliably quantifies the additional multiple-access interference (MAI) inherent to the relaying use. This MAI cost expression depends highly on the adopted frequency reuse pattern. The optimization, in terms of Packet-Error-Rate (PER), is carried out while keeping this MAI cost constant, for regular and fractional frequency reuse patterns. For FFR, different frequency reuse factors are applied to cell-center and cell-edge areas. Simulation results are showing that IAF relaying outperforms the direct transmission scheme by more than 15 dB gain, in terms of the reduction of the MAI. Additionally, IAF seems to be usually more powerful than AF.","PeriodicalId":296060,"journal":{"name":"Third International Conference on Communications and Networking","volume":"507 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115994912","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

Behavior analysis of QoS parameters from a live IP network 动态IP网络中QoS参数的行为分析

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217731

Hassan El Ghazi, H. Dahmouni

{"title":"Behavior analysis of QoS parameters from a live IP network","authors":"Hassan El Ghazi, H. Dahmouni","doi":"10.1109/ComNet.2012.6217731","DOIUrl":"https://doi.org/10.1109/ComNet.2012.6217731","url":null,"abstract":"Given the convergence towards an all IP platform, there has been a tremendous growth in demand for new multimedia applications, which have critical delay and jitter parameters. Thus, the proposed services by all-IP generation require a serious study of QoS parameters by establishing a new algorithm of traffic management. The topic of this paper is the evaluation of QoS parameters in real Pre-Wimax environments. The main contribution is the validation of an analytical delay-jitter behavior model. These models can be used in optimization algorithms in order to provide opportunistic and reliable all-IP networks. It allows understanding the impact of the jitter constraints on the throughput and packet loss in wireless systems. However, we show that the real-time QoS requirements of real-time and interactive services can be avoided to a large degree by controlling the packet delay-jitter in a fixed and mobile environment. The QoS metrics have been computed from live measurements in a Pre-Wimax realistic environment (Toulouse/Blagnac Airport). Tested technology was Pre-Wimax with ALAVRION equipments operating in unlicensed frequency bands (5.4GHz in France) in Time Division Duplex (TDD) mode.","PeriodicalId":296060,"journal":{"name":"Third International Conference on Communications and Networking","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130320754","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 cooperative communication protocol for saving energy consumption in WSNs 一种节省无线传感器网络能耗的协作通信协议

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217725

M. Maalej, Hichem Besbes, S. Cherif

引用次数: 7

Lattice decoding for the Compute-and-Forward protocol 计算转发协议的点阵解码

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217737

Asma Mejri, G. R. Othman, J. Belfiore

{"title":"Lattice decoding for the Compute-and-Forward protocol","authors":"Asma Mejri, G. R. Othman, J. Belfiore","doi":"10.1109/ComNet.2012.6217737","DOIUrl":"https://doi.org/10.1109/ComNet.2012.6217737","url":null,"abstract":"In this work we focus exclusively on the Compute-and-Forward (C&F) protocol as a channel coding-based approach for Physical Layer Network Coding. The Core principle of this relaying strategy is based on using Nested Lattice Codes. The source nodes in a relay network encode their messages into lattice codewords and transmit them to the relay. The latter receives a noisy mixing of these codewords and decodes an integer linear combination of them for sequential transmission. To the best of our knowledge, all existent works related to the Compute-and-Forward protocol study only its theoretical limits and no experimental analysis has been proposed so far. Our contribution through this work concerns a plethora of practical aspects, related to lattice decoding for the C&F, that need to be solved to achieve the promising potential of this strategy. We propose practical decoding approaches and investigate the achieved diversity order and identify the relevant parameters that may influence it. We provide simulation results to compare the performance of the different proposed decoding approaches and to link theoretical results with practical aspects.","PeriodicalId":296060,"journal":{"name":"Third International Conference on Communications and Networking","volume":"311 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116686570","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: 8

Performance evaluation of the HWMP proactive tree mode for IEEE 802.11s based Wireless Mesh Networks 基于IEEE 802.11s的无线Mesh网络中HWMP主动树模式的性能评估

Third International Conference on Communications and Networking Pub Date : 2012-06-14 DOI: 10.1109/ComNet.2012.6217743

Mohamed Guesmia, Mustapha Guezouri, N. Mbarek

引用次数: 9