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2010 Sixth Advanced International Conference on Telecommunications最新文献

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Self-Optimization of Spectrum Assignment and Transmission Power in OFDMA Femtocells OFDMA飞蜂窝中频谱分配和发射功率的自优化
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.14
F. Bernardo, R. Agustí, Jorge Cordero, C. Crespo
{"title":"Self-Optimization of Spectrum Assignment and Transmission Power in OFDMA Femtocells","authors":"F. Bernardo, R. Agustí, Jorge Cordero, C. Crespo","doi":"10.1109/AICT.2010.14","DOIUrl":"https://doi.org/10.1109/AICT.2010.14","url":null,"abstract":"This paper presents a framework based on self-organization to jointly self-optimize the spectrum assignment and the transmission power in the context of downlink OFDMA femtocell deployments. It is a distributed framework where each femtocell acts as an autonomous entity. Femtocells perform spectrum and transmission power assignment based on users’ reported measurements, which are employed to sense intercell interference, including that from other femtocells or from macrocells in two-layer deployments. Results have been obtained for a realistic indoor femtocell deployment with and without macrocell interference. The paper shows that, thanks to self-organization, sensible performance improvements can be achieved in terms of spectral efficiency and power consumption reductions.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125502125","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: 36
A New p-Cycle Selection Approach Based on Efficient Restoration Measure for WDM Optical Networks 基于有效恢复措施的WDM光网络p周期选择新方法
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.79
Carlos Colman Meixner, Liz Campuzano, D. Pinto, E. Dávalos
{"title":"A New p-Cycle Selection Approach Based on Efficient Restoration Measure for WDM Optical Networks","authors":"Carlos Colman Meixner, Liz Campuzano, D. Pinto, E. Dávalos","doi":"10.1109/AICT.2010.79","DOIUrl":"https://doi.org/10.1109/AICT.2010.79","url":null,"abstract":"The study of protection against failures in WDM optical networks plays strategic importance due to huge bandwidth of optical fiber. The p-Cycle is a novel protection approach based on pre-configured cycles to provide a fast recovery for single link failure. The optimal selection of cycles is the central problem to get a high protection performance of p-Cycle approach. In that sense, the importance of the length of a cycle for fast restoration is studied in this paper, because it affects directly the quality of restoration, therefore, the quality-of-service can be affected. This paper proposes a new heuristic approach and a new evaluation metric to solve the p-Cycle protection problem which simultaneously optimizes cost, protection, length and fairness of solutions in a mono-objective approach. Experimental results show a good performance of the heuristic proposed, when is compared with a recent Genetic Algorithms approach and the state-of-the-art ILP method.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124594932","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
Ergodic Capacity of M-1-1 AF Relaying Systems over Rayleigh Fading Channels M-1-1 AF中继系统在瑞利衰落信道上的遍历容量
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.53
Hyunkee Min, Sungeun Lee, Kyungchul Kwak, Hyungjong Kim, D. Hong
{"title":"Ergodic Capacity of M-1-1 AF Relaying Systems over Rayleigh Fading Channels","authors":"Hyunkee Min, Sungeun Lee, Kyungchul Kwak, Hyungjong Kim, D. Hong","doi":"10.1109/AICT.2010.53","DOIUrl":"https://doi.org/10.1109/AICT.2010.53","url":null,"abstract":"The amplify-and-forward relaying system considered here consists of a base station (BS) with M transmit antennas, K relay stations (RSs) with a single antenna each, and a mobile station (MS) with a single antenna. Upper bounds of ergodic capacities are derived for some specific values of M and general values of K where the best relay selection (BRS) is used, and the maximum-ratio-transmission (MRT) is applied for the BS-RS transmission. Numerical results show that increasing M enhances the ergodic capacity due to the reduction of noise propagation, and increasing K also enhances the ergodic capacity due to the K-th order diversity gain from the BRS. In addition, the effect of increasing K on capacity enhancement is much significant compared to that of increasing M. On the other hand, the capacity enhancement from increasing M is limited, whereas the capacity enhancement from increasing K is unlimited. In addition, the capacity enhancement from M and that from K are independent.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129590381","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 Review of UWB MAC Protocols 超宽带MAC协议综述
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.101
M. Zin, M. Hope
{"title":"A Review of UWB MAC Protocols","authors":"M. Zin, M. Hope","doi":"10.1109/AICT.2010.101","DOIUrl":"https://doi.org/10.1109/AICT.2010.101","url":null,"abstract":"In this paper, we review several ultra-wideband (UWB) medium access control (MAC) protocols that have been proposed to date. This review then considers the possibility of developing an optimal MAC layer for high data rate UWB transmission systems that transmit very little power especially in application to mobile devices. MAC in UWB wireless networks is necessary to coordinate channel access among competing devices. Unique UWB characteristics offer great challenges and opportunities in effective UWB MAC design. We first present the background of UWB and the concept of MAC protocols for UWB. Secondly, we summarize four UWB MAC protocols that have been proposed by other researchers and finally, a conclusion with a view to the planned future work. The main contribution of this paper is that it presents a summarised version of several MAC protocols applicable to UWB systems. This will hopefully initiate further research and developments in UWB MAC protocol design.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132368005","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: 25
Renovate Cognitive Networks under Spectrum Unavailability 频谱不可用下的认知网络重构
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.36
A. Al-Dulaimi, Saba Al-Rubaye, H. Al-Raweshidy
{"title":"Renovate Cognitive Networks under Spectrum Unavailability","authors":"A. Al-Dulaimi, Saba Al-Rubaye, H. Al-Raweshidy","doi":"10.1109/AICT.2010.36","DOIUrl":"https://doi.org/10.1109/AICT.2010.36","url":null,"abstract":"Spectrum availability is a decisive factor for the continuity of Cognitive Network (CN) broadcast. Cognitive networks lease the spectrum temporarily whenever the primary users went off. Thus, localized wireless changes within CN cells rapidly affect the transmissions of the cognitive radios. This situation becomes more complicated for cognitive mesh networks when establishing a link over many cells. Therefore, link formation failure may cause complete disruption at certain sites of the network. A mathematical model is first introduced to study the delay impacts of the spectrum unavailability on the CN’s which has been analyzed as the most severe cause for the CN failures. In this paper, a new subnet called Cognitive Radio over Fibre (CRoF) is proposed as an alternative for the wireless links between cognitive base stations every time there is no free spectrum to communicate. In this proposed solution, the CRoF subnet splits the CN into zones according to the number of expected users and free spectrum available. Then, CRoF base stations are placed at the edges of the structured zones to act as seniors for other cognitive cells. Consequently, a new management for secondary networks is achieved for local spectrum access. Initial Opnet simulations show 11% time savings during packet delivery for the CRoF designed scenarios in comparison with traditional CN’s. The proposed CRoF subnet provides a permanent solution to restore service delivery for the CN’s affected by wireless changes.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125807238","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
Impulsive Noise Correction in Systems Based on CGU Frames 基于CGU帧的系统脉冲噪声校正
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.96
F. Abdelkefi
{"title":"Impulsive Noise Correction in Systems Based on CGU Frames","authors":"F. Abdelkefi","doi":"10.1109/AICT.2010.96","DOIUrl":"https://doi.org/10.1109/AICT.2010.96","url":null,"abstract":"In this paper, we highlight that when the overcomplete signal representation is based on a class of frames, called Cyclic Geometrically Uniform (CGU) finite frames, family of frames containing finite harmonic frames (both in RM and CM), this representation becomes equivalent to a Reed-Solomon (RS) coding scheme. Hence, the main benefit obtained from the relationship between the CGU frame and RS code, consists on canceling the errors introduced by the transmission channel. This obviously leads to a quasiperfect reconstructed signal and a robust and low complexity transmission. Simulation results are presented to confirm our claims.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125932567","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 Context-Aware Communication Link for Unmanned Aerial Vehicles 一种用于无人机的上下文感知通信链路
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.83
E. Moreira, R. M. Vanni, Diego L. Função, C. Marcondes
{"title":"A Context-Aware Communication Link for Unmanned Aerial Vehicles","authors":"E. Moreira, R. M. Vanni, Diego L. Função, C. Marcondes","doi":"10.1109/AICT.2010.83","DOIUrl":"https://doi.org/10.1109/AICT.2010.83","url":null,"abstract":"The impact of contextual events for the performance of high bandwidth communication UAV link is the theme of this paper. Applications in this field have some strict quality requirements, and the communication link performance is essential for the mission success. Several events in the flight or in the surroundings can interfere with the data stream. We describe a context-controlled system which could dynamically adapt the flight in order to cope with eventualities during a mission. The main constraints of the link are discussed, and we analyze the link budget for the link considering directional receiving and transmitting antennas.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130405792","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
Radio Optimization of High Speed Mobile Networks 高速移动网络的无线电优化
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.70
T. Janevski, V. Nikolic
{"title":"Radio Optimization of High Speed Mobile Networks","authors":"T. Janevski, V. Nikolic","doi":"10.1109/AICT.2010.70","DOIUrl":"https://doi.org/10.1109/AICT.2010.70","url":null,"abstract":"In this paper, we provide radio plan performance optimization of the high speed mobile networks that carry multimedia traffic. We showed that knowing the uplink coverage one can accurately balance the service area in downlink and uplink in the radio network. Also, it was shown that the choice of optimal antenna beam width and tilt is important for better performances. Thus, the interference may be controlled and the capacity and coverage may be balanced and improved. However, it was also shown that higher user data rates may lead to lower capacity of the system and higher instability of the available capacity. All results in this paper can be used in the radio optimization process of high speed mobile networks.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127260670","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
Speech Quality Prediction in VoIP Concatenating Multiple Markov-Based Channels 基于马尔可夫信道的VoIP语音质量预测
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.46
Iban Lopetegui, R. Carrasco, S. Boussakta
{"title":"Speech Quality Prediction in VoIP Concatenating Multiple Markov-Based Channels","authors":"Iban Lopetegui, R. Carrasco, S. Boussakta","doi":"10.1109/AICT.2010.46","DOIUrl":"https://doi.org/10.1109/AICT.2010.46","url":null,"abstract":"The cross interaction of technologies has become standard practice to add more constraints to Voice over Internet Protocol sessions (VoIP). In this paper, a self developed end to end VoIP simulator to predict speech quality is presented. This system has been validated with a real test bench and can provide up to three audio compressors and two channel status at a time. Simulator response is tested through a Mean Opinion Score (MOS) and compared to ITU-T´s G.107 E-model speech quality predictor. High packet loss rate limitation on the E-model is solved by our proposed new parameter. In addition, a methodology to extend this predictor for multiple concatenated channels has been tested and proved to be successful, results in double channels tests range between 1.86R and 8.35R error rate. The methodology is a useful speech quality predictor for design and management purposes, VoIP gateways can take advantage of channels and codec information to guarantee an specific quality of service to end users.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127565942","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
Efficient Power Management Adaptation for Video Transmission over TFRC 基于TFRC的视频传输的高效电源管理适应
2010 Sixth Advanced International Conference on Telecommunications Pub Date : 2010-05-09 DOI: 10.1109/AICT.2010.10
C. Bouras, V. Papapanagiotou, K. Stamos, G. Zaoudis
{"title":"Efficient Power Management Adaptation for Video Transmission over TFRC","authors":"C. Bouras, V. Papapanagiotou, K. Stamos, G. Zaoudis","doi":"10.1109/AICT.2010.10","DOIUrl":"https://doi.org/10.1109/AICT.2010.10","url":null,"abstract":"In this paper, we describe a power management mechanism for wireless video transmission using the TFRC protocol that takes into account feedback about the received video quality and tries to intelligently adapt transmitting power accordingly. The purpose of the mechanism is to utilize TFRC feedback and thus achieve a beneficial balance between the power consumption and the received video quality. We use simulation in order to compare and evaluate our approach.","PeriodicalId":339151,"journal":{"name":"2010 Sixth Advanced International Conference on Telecommunications","volume":"2007 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125584512","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
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