Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000013
Andrea Pirsa, Leon Rokic, Hrvoje Vdovic, Lara Vertlberg, Matea Zilak, Z. Car, V. Podobnik
Nowadays more than a billion people with various disabilities face barriers in inclusion. ICT-based assistive solutions are high-tech approach for overcoming those barriers. While ICT devices become more and more available and affordable, as well as ICT-based assistive solution more and more numerous, the systematic solution which would enable people with disabilities to search for appropriate ICT-based assistive solution still lacks. This paper is a step towards in that direction. The paper firstly proposes a taxonomy for ICT-based assistive solution and then uses the proposed taxonomy to systematically categorize and describe currently available ICT-based assistive solutions on the global market. Finally, the paper proposes the operationalization of the proposed taxonomy in a form of the spreadsheet tool which enables user friendly search of indexed ICT-based assistive solutions.
{"title":"Analysis of ICT-based assistive solutions for people with disabilities","authors":"Andrea Pirsa, Leon Rokic, Hrvoje Vdovic, Lara Vertlberg, Matea Zilak, Z. Car, V. Podobnik","doi":"10.23919/ConTEL.2017.8000013","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000013","url":null,"abstract":"Nowadays more than a billion people with various disabilities face barriers in inclusion. ICT-based assistive solutions are high-tech approach for overcoming those barriers. While ICT devices become more and more available and affordable, as well as ICT-based assistive solution more and more numerous, the systematic solution which would enable people with disabilities to search for appropriate ICT-based assistive solution still lacks. This paper is a step towards in that direction. The paper firstly proposes a taxonomy for ICT-based assistive solution and then uses the proposed taxonomy to systematically categorize and describe currently available ICT-based assistive solutions on the global market. Finally, the paper proposes the operationalization of the proposed taxonomy in a form of the spreadsheet tool which enables user friendly search of indexed ICT-based assistive solutions.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132975157","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000036
H. Ivanov, T. Plank, C. Pock, E. Leitgeb
A novel approach for testing Free Space Optical (FSO) systems in a controlled laboratory condition is proposed. Based on fibre optics technology, our testbed could effectively emulate the operation of real wireless optical communication systems combined with various atmospheric perturbation effects such as fog and clouds. The suggested architecture applies an optical variable attenuator as a main device representing the tropospheric influences over the launched Gaussian beam in the free space channel. In addition, the current scheme involves an attenuator control unit with an external Digital Analog Converter (DAC) controlled by self-developed software. To obtain optimal results in terms of the presented setup, a calibration process including linearization of the non-linear attenuation versus voltage figure is performed. Finally, analytical results of the attenuation based on real and simulated measurements with the hardware channel emulator (= testbed) in a laboratory controlled environment are shown.
{"title":"FSO system performance evaluation based on calibrated atmospheric channel emulation","authors":"H. Ivanov, T. Plank, C. Pock, E. Leitgeb","doi":"10.23919/ConTEL.2017.8000036","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000036","url":null,"abstract":"A novel approach for testing Free Space Optical (FSO) systems in a controlled laboratory condition is proposed. Based on fibre optics technology, our testbed could effectively emulate the operation of real wireless optical communication systems combined with various atmospheric perturbation effects such as fog and clouds. The suggested architecture applies an optical variable attenuator as a main device representing the tropospheric influences over the launched Gaussian beam in the free space channel. In addition, the current scheme involves an attenuator control unit with an external Digital Analog Converter (DAC) controlled by self-developed software. To obtain optimal results in terms of the presented setup, a calibration process including linearization of the non-linear attenuation versus voltage figure is performed. Finally, analytical results of the attenuation based on real and simulated measurements with the hardware channel emulator (= testbed) in a laboratory controlled environment are shown.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126038562","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000049
K. Grgic, Vedran Mendelski, D. Zagar
The development of wireless sensor networks and constant increase of their capabilities enabled the integration of image capturing device within sensor node, representing the basis for visual sensor network. Such smart camera is primarily used for converting visual data into knowledge. The paper analyzes security requirements of visual sensor networks and describes possible security threats and attacks, while also suggesting possible countermeasures. Security framework for possible application on visual sensor networks and smart cameras is also proposed, and its components are explained. Finally, some conclusions are derived and suggestions for future development are given.
{"title":"Security framework for visual sensors and smart camera networks","authors":"K. Grgic, Vedran Mendelski, D. Zagar","doi":"10.23919/ConTEL.2017.8000049","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000049","url":null,"abstract":"The development of wireless sensor networks and constant increase of their capabilities enabled the integration of image capturing device within sensor node, representing the basis for visual sensor network. Such smart camera is primarily used for converting visual data into knowledge. The paper analyzes security requirements of visual sensor networks and describes possible security threats and attacks, while also suggesting possible countermeasures. Security framework for possible application on visual sensor networks and smart cameras is also proposed, and its components are explained. Finally, some conclusions are derived and suggestions for future development are given.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123891874","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000009
S. Krajnović
Radio access technologies for mobile broadband have evolved effectively to provide connectivity to billions of subscribers and things. Current Radio Access Network architecture is undergoing a transformation to increase deployment flexibility and network dynamicity, so that networks will be able to meet the performance requirements demanded by applications such as extreme mobile broadband and long-range massive machine type communication. Next generation 5G networks will cater for a wide range of new business opportunities, some of which have yet to be conceptualized. They will provide support for advanced mobile broadband services such as massive media distribution. Applications like remote operation of machinery, tele-surgery, and smart metering all require connectivity, but with vastly different characteristics. The ability to provide customized connectivity will benefit many industries around the world, enabling them to bring new products and services to market rapidly, and adapt to fast changing demands, all while continuing to offer and expand existing services. To prevent total cost of ownership from soaring, the 5G architecture will be software configurable and split between general purpose and specialized hardware, in a way that enables optimal placement of networks functions.
{"title":"5G and Radio Access Network architecture","authors":"S. Krajnović","doi":"10.23919/ConTEL.2017.8000009","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000009","url":null,"abstract":"Radio access technologies for mobile broadband have evolved effectively to provide connectivity to billions of subscribers and things. Current Radio Access Network architecture is undergoing a transformation to increase deployment flexibility and network dynamicity, so that networks will be able to meet the performance requirements demanded by applications such as extreme mobile broadband and long-range massive machine type communication. Next generation 5G networks will cater for a wide range of new business opportunities, some of which have yet to be conceptualized. They will provide support for advanced mobile broadband services such as massive media distribution. Applications like remote operation of machinery, tele-surgery, and smart metering all require connectivity, but with vastly different characteristics. The ability to provide customized connectivity will benefit many industries around the world, enabling them to bring new products and services to market rapidly, and adapt to fast changing demands, all while continuing to offer and expand existing services. To prevent total cost of ownership from soaring, the 5G architecture will be software configurable and split between general purpose and specialized hardware, in a way that enables optimal placement of networks functions.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127082648","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000045
V. Vassilakis, I. Moscholios, B. Alzahrani, M. Logothetis
The concept of software-defined networking (SDN) is able to offer important advantages over the traditional communication paradigms. This is achieved by decoupling the decision-making process from the underlying network infrastructure that forwards the traffic. Recently, there have been efforts in applying the SDN approach to wireless and cellular networks. In fact, SDN is considered as one of the key enablers for future 5G communication networks. Information-centric networking (ICN) is another emerging communication paradigm that has been proposed to improve the content delivery efficiency compared to the traditional host-centric communication protocols. ICN decouples the data from their location, application, and means of transportation. This feature makes ICN particularly suitable for efficient dissemination of large volumes of data, especially in highly dynamic and heterogeneous mobile environments. In this work, we consider an SDN-enabled cellular network and propose an ICN protocol to ensure fast and efficient content dissemination to mobile users. The proposed protocol has been evaluated by means of computer simulations for the use case of a live video streaming service. Our experimental results show significant improvements in terms of response times over the current long-term evolution (LTE) networks.
{"title":"Toward information-centric software-defined cellular networks","authors":"V. Vassilakis, I. Moscholios, B. Alzahrani, M. Logothetis","doi":"10.23919/ConTEL.2017.8000045","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000045","url":null,"abstract":"The concept of software-defined networking (SDN) is able to offer important advantages over the traditional communication paradigms. This is achieved by decoupling the decision-making process from the underlying network infrastructure that forwards the traffic. Recently, there have been efforts in applying the SDN approach to wireless and cellular networks. In fact, SDN is considered as one of the key enablers for future 5G communication networks. Information-centric networking (ICN) is another emerging communication paradigm that has been proposed to improve the content delivery efficiency compared to the traditional host-centric communication protocols. ICN decouples the data from their location, application, and means of transportation. This feature makes ICN particularly suitable for efficient dissemination of large volumes of data, especially in highly dynamic and heterogeneous mobile environments. In this work, we consider an SDN-enabled cellular network and propose an ICN protocol to ensure fast and efficient content dissemination to mobile users. The proposed protocol has been evaluated by means of computer simulations for the use case of a live video streaming service. Our experimental results show significant improvements in terms of response times over the current long-term evolution (LTE) networks.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123861332","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000043
Radu-Ioan Ciobanu, C. Dobre, Daniel Gutiérrez-Reina, S. T. Marín
When two nodes in an opportunistic network meet, a utility function is generally employed to select the data that have to be exchanged between them, in order to maximize the chance of message delivery and to minimize congestion. The utility function computes weighted sums of various parameters, such as node centrality, similarity, trust, etc. Most of the existing solutions pre-compute the weights based on offline observations, and apply the same values regardless of a node's context. However, since mobile networks are extremely varied in terms of node type and behavior, this approach might prove not to be optimal. The network might be split into sub-networks that behave differently from each other (for instance, a group of nodes from the network might have many contacts, whereas some nodes might spend hours without encountering other peers). Thus, in this paper we wish to lay the foundation for a dynamic data routing solution for opportunistic networks. We show that nodes do indeed behave differently and have different views of the network, but that familiar nodes (i.e., that meet each other often for long periods of time) are alike in terms of behavior. Furthermore, we adapt an existing dissemination solution to dynamically adjust the weights of the utility function based on a node's context, and show through simulations that it behaves better than the static version. This would allow us to pre-compute the weights of the utility function and dynamically change them as a node's view of the network is modified, leading to a more efficient dissemination.
{"title":"A dynamic data routing solution for opportunistic networks","authors":"Radu-Ioan Ciobanu, C. Dobre, Daniel Gutiérrez-Reina, S. T. Marín","doi":"10.23919/ConTEL.2017.8000043","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000043","url":null,"abstract":"When two nodes in an opportunistic network meet, a utility function is generally employed to select the data that have to be exchanged between them, in order to maximize the chance of message delivery and to minimize congestion. The utility function computes weighted sums of various parameters, such as node centrality, similarity, trust, etc. Most of the existing solutions pre-compute the weights based on offline observations, and apply the same values regardless of a node's context. However, since mobile networks are extremely varied in terms of node type and behavior, this approach might prove not to be optimal. The network might be split into sub-networks that behave differently from each other (for instance, a group of nodes from the network might have many contacts, whereas some nodes might spend hours without encountering other peers). Thus, in this paper we wish to lay the foundation for a dynamic data routing solution for opportunistic networks. We show that nodes do indeed behave differently and have different views of the network, but that familiar nodes (i.e., that meet each other often for long periods of time) are alike in terms of behavior. Furthermore, we adapt an existing dissemination solution to dynamically adjust the weights of the utility function based on a node's context, and show through simulations that it behaves better than the static version. This would allow us to pre-compute the weights of the utility function and dynamically change them as a node's view of the network is modified, leading to a more efficient dissemination.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128298518","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000044
Koichi Nihei, H. Yoshida, Natsuki Kai, Dai Kanetomo, K. Satoda
Video streaming is now one of the main applications on mobile networks. Since the throughput fluctuates widely on a mobile network, adaptive bitrate control methods that control the video bitrate in accordance with this fluctuation have been developed. These methods decide the bitrate at a one-second or a few-second interval. In most of these methods, the output of a decision is a bitrate value, and the decided bitrate continues until the next decision. This paper models the behavior of video packets on a mobile uplink and proposes a novel bitrate control method. In the method, the output of a decision is the bitrate change over time for several seconds into the future, not a bitrate value, that maximizes an integrated value of the quality of experience (QoE) indicator for the model of behavior. This paper compares the proposed method with conventional methods by simulation. The proposed method improved the mean opinion score (MOS), which indicates the estimated QoE as a value between 1 and 5, by up to 0.2.
{"title":"QoE maximizing bitrate control for live video streaming on a mobile uplink","authors":"Koichi Nihei, H. Yoshida, Natsuki Kai, Dai Kanetomo, K. Satoda","doi":"10.23919/ConTEL.2017.8000044","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000044","url":null,"abstract":"Video streaming is now one of the main applications on mobile networks. Since the throughput fluctuates widely on a mobile network, adaptive bitrate control methods that control the video bitrate in accordance with this fluctuation have been developed. These methods decide the bitrate at a one-second or a few-second interval. In most of these methods, the output of a decision is a bitrate value, and the decided bitrate continues until the next decision. This paper models the behavior of video packets on a mobile uplink and proposes a novel bitrate control method. In the method, the output of a decision is the bitrate change over time for several seconds into the future, not a bitrate value, that maximizes an integrated value of the quality of experience (QoE) indicator for the model of behavior. This paper compares the proposed method with conventional methods by simulation. The proposed method improved the mean opinion score (MOS), which indicates the estimated QoE as a value between 1 and 5, by up to 0.2.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"1246 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128110861","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000047
A. Preinerstorfer, Maria Egly, I. Gojmerac, Christoph Hochwarter, Christine Schuster, Rob Stocker
The recent advancements in mobile network technologies and terminals have enabled ubiquitous Internet coverage, opening novel possibilities for public safety applications, and especially public warning and alerting. In this paper, we present the most recent results of the Austrian national project PASA (Public Warning and Alert System for Austria), the aim of which is to design, prototypically develop and evaluate a novel national public warning system, thereby following an interdisciplinary systems engineering process. After briefly describing the available technological alternatives, we summarize both our investigations about the preferences of the Austrian population and the results of the requirements specification phase of the project. Subsequently, we describe the high-level architecture of the PASA system before discussing the selected use case scenarios which will be realized in the scope of the project. Finally, we conclude the present paper with a brief summary and an outlook on our future research within the Austrian national and the European context.
{"title":"Requirements for the next generation Public Warning and Alert System for Austria","authors":"A. Preinerstorfer, Maria Egly, I. Gojmerac, Christoph Hochwarter, Christine Schuster, Rob Stocker","doi":"10.23919/ConTEL.2017.8000047","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000047","url":null,"abstract":"The recent advancements in mobile network technologies and terminals have enabled ubiquitous Internet coverage, opening novel possibilities for public safety applications, and especially public warning and alerting. In this paper, we present the most recent results of the Austrian national project PASA (Public Warning and Alert System for Austria), the aim of which is to design, prototypically develop and evaluate a novel national public warning system, thereby following an interdisciplinary systems engineering process. After briefly describing the available technological alternatives, we summarize both our investigations about the preferences of the Austrian population and the results of the requirements specification phase of the project. Subsequently, we describe the high-level architecture of the PASA system before discussing the selected use case scenarios which will be realized in the scope of the project. Finally, we conclude the present paper with a brief summary and an outlook on our future research within the Austrian national and the European context.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124562545","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000052
Maja Stupalo, J. Ilic, Luka Humski, Z. Skocir, D. Pintar, M. Vranić
Online social networks (OSN) are one of the most widely adapted services of the Internet infrastructure, Facebook being one of the most popular among them. Facebook models connections between its users through the concept of “friendship”. However, the type and intensity of these connections between different people on Facebook vary significantly. In most cases, friends on Facebook correspond to mere acquaintances in real-life, with only a smaller subset representing actual close friends. The aim of research presented in this paper is to provide a method for estimating the intensity of Facebook friendships, i.e., to distinguish connections representing close friends from others. The study was performed by analyzing Facebook interactions between users (e.g. number of mutual likes, comments, shared photos, etc.) using supervised learning algorithms for binary classification of data. Among the chosen algorithms, the best results were gained by using random forest algorithm - accuracy of 84.73%.
{"title":"Applying the binary classification methods for discovering the best friends on an online social network","authors":"Maja Stupalo, J. Ilic, Luka Humski, Z. Skocir, D. Pintar, M. Vranić","doi":"10.23919/ConTEL.2017.8000052","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000052","url":null,"abstract":"Online social networks (OSN) are one of the most widely adapted services of the Internet infrastructure, Facebook being one of the most popular among them. Facebook models connections between its users through the concept of “friendship”. However, the type and intensity of these connections between different people on Facebook vary significantly. In most cases, friends on Facebook correspond to mere acquaintances in real-life, with only a smaller subset representing actual close friends. The aim of research presented in this paper is to provide a method for estimating the intensity of Facebook friendships, i.e., to distinguish connections representing close friends from others. The study was performed by analyzing Facebook interactions between users (e.g. number of mutual likes, comments, shared photos, etc.) using supervised learning algorithms for binary classification of data. Among the chosen algorithms, the best results were gained by using random forest algorithm - accuracy of 84.73%.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123788698","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}
Pub Date : 2017-06-01DOI: 10.23919/ConTEL.2017.8000035
F. Knobloch
Visible light communication (VLC) is an emerging technology for public street lighting. The paper comprises two parts. A spatial scaled simulation model for Signal to Noise Ratio (SNR) analysis and a spatial scaled experiment are elaborated to evaluate the VLC propagation channel model in an inhomogeneous street lighting channel. As a first result, a minor improved non Line of Sight (NLoS) ceiling bounce simulation substantially agrees with the measurement. The model is sufficient adequate for a path loss estimation in a larger spatial dimension. As a second result, the receiver requires a huge aperture of 10 to 30 cm diameter for a communication performance of wireless sensor networks between the lights. The Line of Sight (LoS) link requires nearly a quarter of the surface but pointing errors are likely due to the rural outdoor environment. Furthermore, the spatial simulation resolution considering a small Field of View (FOV) influences the gain of up to 5 dB and has therefore been identified as a new error source in the NLoS propagation model whereby the influence is negligible at medium distances.
{"title":"Impact of dimming and aperture on the optical wireless performance in public street lighting","authors":"F. Knobloch","doi":"10.23919/ConTEL.2017.8000035","DOIUrl":"https://doi.org/10.23919/ConTEL.2017.8000035","url":null,"abstract":"Visible light communication (VLC) is an emerging technology for public street lighting. The paper comprises two parts. A spatial scaled simulation model for Signal to Noise Ratio (SNR) analysis and a spatial scaled experiment are elaborated to evaluate the VLC propagation channel model in an inhomogeneous street lighting channel. As a first result, a minor improved non Line of Sight (NLoS) ceiling bounce simulation substantially agrees with the measurement. The model is sufficient adequate for a path loss estimation in a larger spatial dimension. As a second result, the receiver requires a huge aperture of 10 to 30 cm diameter for a communication performance of wireless sensor networks between the lights. The Line of Sight (LoS) link requires nearly a quarter of the surface but pointing errors are likely due to the rural outdoor environment. Furthermore, the spatial simulation resolution considering a small Field of View (FOV) influences the gain of up to 5 dB and has therefore been identified as a new error source in the NLoS propagation model whereby the influence is negligible at medium distances.","PeriodicalId":410388,"journal":{"name":"2017 14th International Conference on Telecommunications (ConTEL)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130914716","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}
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