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2006 International Conference on Software in Telecommunications and Computer Networks最新文献

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Evaluation of QoS Support for Multimedia Traffics in IEEE 802.11e IEEE 802.11e中多媒体业务的QoS支持评估
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329728
A. Andreadis, G. Benelli, Riccardo Zambon
{"title":"Evaluation of QoS Support for Multimedia Traffics in IEEE 802.11e","authors":"A. Andreadis, G. Benelli, Riccardo Zambon","doi":"10.1109/SOFTCOM.2006.329728","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329728","url":null,"abstract":"The efficient delivery of multimedia over wireless LANs is strongly dependent on the requirements imposed by different traffics contending the channel resources. Mechanisms for supporting QoS are needed, especially when voice and video applications come into play with stringent constraints in terms of delay and throughput. In this paper we evaluate, through simulations, the benefits derived from the adoption of the IEEE 802.11e standard in delivering multimedia over WLANs. The adoption of fine-tuned parameters regulating the EDCA MAC scheme permits to achieve high performance in terms of goodput and delay, allowing multimedia traffics to fully satisfy their QoS requirements. Realistic assumptions have been made in our simulations, by taking into account the shadowing effects, typical of closed environments, and by adopting suitable parameters to simulate 802.11e channels as exactly as possible","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121380080","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: 10
Parametric Models for Speech Quality Estimation in GSM Networks GSM网络中语音质量估计的参数模型
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329748
M. Barile, P. Camarda, R. Dell'Aquila, N. Vitti
{"title":"Parametric Models for Speech Quality Estimation in GSM Networks","authors":"M. Barile, P. Camarda, R. Dell'Aquila, N. Vitti","doi":"10.1109/SOFTCOM.2006.329748","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329748","url":null,"abstract":"Speech quality assessment is an emergent QoS aspect in cellular network monitoring. This contribution deals with the estimation of perceived speech quality in GSM networks, by means of parametric models. Our goal is to provide a model for MOS estimation, based on parameters available in the operation and maintenance centre (OMC) and in the measurement reports from mobile stations. Specifically, based on MOS values from a large database obtained performing intrusive tests in a real GSM network, and on the correspondent measured transmission parameters, an extensive data analysis has been conducted. The correlation coefficients of GSM parameters with the objective speech quality have been then maximized, and a simple linear model has been proposed. Moreover, handover events have been considered and their impact on perceived speech quality has been proved","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"647 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113996425","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: 7
Electromagnetic effects on transmission lines 传输线上的电磁效应
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329719
D. A. Larrabee
{"title":"Electromagnetic effects on transmission lines","authors":"D. A. Larrabee","doi":"10.1109/SOFTCOM.2006.329719","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329719","url":null,"abstract":"Electromagnetic fields can generate interference on intersystem wiring and cabling. Often this interconnection is in the form of cables and other forms of transmission lines. The simplest model for the system interconnections is a two wire transmission line. Even such a simple case is complex when the wavelength approaches the spacing between the conductors. In such a case one needs to use the full set of Maxwell's equations. Such calculations are computationally expensive. The general solution to this problem provides more information than is needed. A simpler approach is to compute the resonant frequency amplitudes using a modified transmission line model which includes a radiation resistance term. We have obtained a closed form solution of the modified transmission line model with radiation resistance. We compare the results of this solution with computational solutions obtained from a Maxwell equation solver. We conclude that under some conditions, the model is sufficiently accurate at wavelengths larger than 5 times the separation of the wires on the transmission line","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114484956","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
Robust and Survivable Network Design for Entirely Uncertain Traffic Demand Patterns 完全不确定流量需求模式下的鲁棒生存网络设计
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329754
M. Scheffel
{"title":"Robust and Survivable Network Design for Entirely Uncertain Traffic Demand Patterns","authors":"M. Scheffel","doi":"10.1109/SOFTCOM.2006.329754","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329754","url":null,"abstract":"New and more dynamic services cause significant changes in the traffic distribution of today's transport networks. Thus it is a crucial challenge for network providers to dimension their networks appropriately to be able to satisfy the demands. This paper investigates the traffic portion of entirely uncertain demand requests that do not allow any forecast. We develop mathematical programs to minimize the overall capacity consumption and investigate a case study scenario","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130761028","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
The Role of Position Reporting Frequency in LBS QoS Establishment 位置报告频率在LBS服务质量建立中的作用
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329749
L. Busic, R. Filjar
{"title":"The Role of Position Reporting Frequency in LBS QoS Establishment","authors":"L. Busic, R. Filjar","doi":"10.1109/SOFTCOM.2006.329749","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329749","url":null,"abstract":"Position reporting frequency (PRF) is among the main parameters that determine the quality of service (QoS) of location-based services (LBS). Well established PRF provides scalable location awareness for the LBS subject in question. The best description of particular object's location would be obtained if he/she/it were reporting the positioning in very small steps. However, this would soon overburden the network with mostly unnecessary traffic. In order to overcome the limitations of an ideal reporting scheme and preserve acceptable level of location awareness quality, the PRF requirements should be optimised in relation to both available resources and solution performance. This paper addresses a case-related approach for PRF requirements establishment. Three LBS solution paradigms has been chosen for an analysis aimed to yield PRF requirements parameters. PRF parameters have been identified as applicable for a general guidance in more detailed definition of PRF for location-based services","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117226862","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: 5
Composite Noise Temperature at Low Earth Orbiting Satellite Ground Station 低地球轨道卫星地面站合成噪声温度
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329751
S. Cakaj, K. Malaric
{"title":"Composite Noise Temperature at Low Earth Orbiting Satellite Ground Station","authors":"S. Cakaj, K. Malaric","doi":"10.1109/SOFTCOM.2006.329751","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329751","url":null,"abstract":"Noise introduces a fundamental limit on the performance of any communication system. Satellite communication systems are particularly susceptible to noise because of their inherent low received power. During the link budget calculations, noises of the equipment and line loss have to be considered. An alternative, but equivalent way of expressing the noisiness of the equipment and line loss is through noise temperature. The noise temperature which represents noise of all components in satellite receiving system chain is called composite noise temperature. Thus, on this paper the methodology applied for composite noise temperature calculations for satellite links is presented. In order to illustrate these calculations, data of Vienna ground station within MOST project are applied. The project MOST (microvariability and oscillations of stars) is a Canadian micro satellite space telescope mission. The project MOST consists of a low earth orbiting (LEO) satellite and three ground stations, one of them in Vienna. The Vienna ground station system was set up at the Institute for Astronomy of the University of Vienna in cooperation with the Institute of Communications and Radio-Frequency Engineering of the Vienna University of Technology. The satellite link operates on 2 GHz band","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117207463","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: 7
Visualization of Mobile Ad-Hoc Laboratory Network (S-Net) 移动自组织实验室网络(S-Net)可视化
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329732
B. Jagodic
{"title":"Visualization of Mobile Ad-Hoc Laboratory Network (S-Net)","authors":"B. Jagodic","doi":"10.1109/SOFTCOM.2006.329732","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329732","url":null,"abstract":"Surging mobile ad-hoc networks have become interesting from application and service delivery point of view. Since links between nodes in such infrastructureless network alternate continuously, the network's wireless topology may change rapidly and unpredictably. Thus, the visualization of the topology and routing mechanisms becomes important in testing and evaluation of the very network, as well as in understanding of its concepts and organisation. This paper reviews the most frequently used techniques in the visualization of mobile ad-hoc networks. Moreover, the visualization of S-Net, a mobile ad-hoc laboratory network developed by our research team, is described in detail","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128540553","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
Regional Networks and Operator Neutrality in Finland 芬兰的区域网络和运营商中立性
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329758
T. Karhula, J. Ikonen, M. Juutilainen
{"title":"Regional Networks and Operator Neutrality in Finland","authors":"T. Karhula, J. Ikonen, M. Juutilainen","doi":"10.1109/SOFTCOM.2006.329758","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329758","url":null,"abstract":"Broadband Internet access is not hype but everyday reality. Internet service providers are calling everything that is sufficient for using current Internet services as broadband. The use for broadband is changing towards high bandwidth services, like IPTV. However current broadband connections limit deployment of new high bandwidth services. In this paper we examine a network access model where access to end users is owned by a network access company and services are provided by separate companies. This model is called operator neutral network (ONN) model and it is assumed to promote the number of available services as they are treated equally by the network owner. We also study the situation of regional networks in Finland and classify them","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130544109","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
The Management Infrastructure of a Network Measurement System for QoS Parameters QoS参数网络测量系统的管理架构
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329752
A. Bikfalvi, P. Patras, C. Vancea, V. Dobrota
{"title":"The Management Infrastructure of a Network Measurement System for QoS Parameters","authors":"A. Bikfalvi, P. Patras, C. Vancea, V. Dobrota","doi":"10.1109/SOFTCOM.2006.329752","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329752","url":null,"abstract":"The paper presents the designing principles of a management infrastructure for monitoring the capabilities of different network interface cards (gigabit Ethernet, Endace), both for traffic generation and capturing at reception. This evaluation is useful to asses the goodness of captured traffic analysis and QoS performance measurements, using PC based platforms. The idea was to implement the communication of the management information between an administration console and a set of distributed SNMP-based software measurement agents for GNU/Linux platforms that enable to perform QoS measurement sessions","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125452106","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
Policy Based Data Access in Wireless Adhoc Networks 无线自组网中基于策略的数据访问
2006 International Conference on Software in Telecommunications and Computer Networks Pub Date : 2006-09-01 DOI: 10.1109/SOFTCOM.2006.329733
Q. Memon
{"title":"Policy Based Data Access in Wireless Adhoc Networks","authors":"Q. Memon","doi":"10.1109/SOFTCOM.2006.329733","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2006.329733","url":null,"abstract":"A mobile adhoc network (MANET) provides a communication environment that is characterized by dynamic changes in topology and in the availability of resources. In this work, concepts of role-based access and databases are combined to specify separation of duty (on wireless networks) as required for database integrity. The framework to adapt policy based access control models in the MANET environment is discussed. Given this approach, a system developer can design an authorization model for data access and its transfer, based on roles in an adhoc environment","PeriodicalId":292242,"journal":{"name":"2006 International Conference on Software in Telecommunications and Computer Networks","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126358530","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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