Disponibilidad Espacial Del Espectro Dentro De Zonas Urbanas Densas

Con la creciente demanda de servicios con acceso inalámbrico de corto alcance que operan en bandas de uso compartido (e.g. ISM), sobretodo en zonas urbanas densas, existe preocupación de futuros colapsos en ese segmento de espectro radioeléctrico, debido al incremento de los niveles de interferencia. En ese contexto, las tecnologías con capacidades de acceso oportunista del espectro (OSA) podrían brindar una buena alternativa para descongestionar las bandas ISM. En particular permitiendo a los dispositivos que laboran en bandas ISM acceder de manera oportunista a otras bandas licenciadas a otros sistemas (e.g. TV) sin causar interferencia a sus usuarios legítimos. Por lo antes expuesto, en este artículo se propone cuantificar la disponibilidad espacial del espectro licenciado en zonas al interior de edificios, de manera que sistemas de corto alcance puedan funcionar como usuarios secundarios en bandas licenciadas. Para este estudio se utilizaron varios modelos de propagación semi-empíricos que permiten hacer un análisis exhaustivo de aproximación.The growing demand for services with short-range wireless operating in sharing bands (e.g. ISM), especially in dense urban areas, there is concern of future collapses in that segment of the radio spectrum due to increased interference levels. In this context, technologies with opportunistic spectrum access (OSA) capabilities could provide a good alternative to decongest the ISM bands. In particular allowing devices working in ISM bands opportunistically access to other bands so licensed to other systems (e.g. TV) without causing interference to legitimate users. For the above, this article proposes to quantify the spatial availability of licensed spectrum in areas inside buildings, so that short-range systems can function as secondary users in licensed bands. For this study various semi-empirical propagation models that allow do a thorough analysis approach have been used

EVALUATION OF SPECTRUM OCCUPANCY AND COMPARISON FOR THREE DIFFERENT REGIONS

Radio spectrum is a scarce source and very significant to measure and monitor. The present spectrum must be exploited efficiently since every new application must be allocated to spectrum. With purpose of using the spectrum efficiently, there are worldwide research efforts on dynamic spectrum access. Among these methods, cognitive radio mostly draws attention. In order to carry out dynamic spectrum access studies successfully, available spectrum must be meticulously analyzed. In this paper, spectrum occupancy measurements between 25-3000 MHz frequency bands were made in three different regions (Selçuklu, Karatay, Meram) of Konya, Turkey in outdoors during six months. Obtained data is presented with graphics. The occupancy ratios are %5.12, %4.46 and %4.19 for Selçuklu, Karatay and Meram, respectively

A radio spectrum measurement platform for spectrum surveying in cognitive radio

This paper presents a sophisticated radio spectrum measurement platform specifically envisaged and designed for spectrum occupancy surveys in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR). The presented tool is a very flexible computer-controlled radio measurement system, which has successfully been used in extensive spectrum measurement campaigns and empirical studies in the context of the DSA/CR technology. An exhaustive and in-depth description of the developed measurement platform is provided, with a special emphasis on implementation details and lessons learned during the development of the tool that may result helpful to other researchers and engineers in the development of similar radio spectrum measurement tools.Peer ReviewedPostprint (published version

A radio spectrum measurement platform for spectrum surveying in cognitive radio

This paper presents a sophisticated radio spectrum measurement platform specifically envisaged and designed for spectrum occupancy surveys in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR). The presented tool is a very flexible computer-controlled radio measurement system, which has successfully been used in extensive spectrum measurement campaigns and empirical studies in the context of the DSA/CR technology. An exhaustive and in-depth description of the developed measurement platform is provided, with a special emphasis on implementation details and lessons learned during the development of the tool that may result helpful to other researchers and engineers in the development of similar radio spectrum measurement tools.Peer Reviewe

A radio spectrum measurement platform for spectrum surveying in cognitive radio

This paper presents a sophisticated radio spectrum measurement platform specifically envisaged and designed for spectrum occupancy surveys in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR). The presented tool is a very flexible computer-controlled radio measurement system, which has successfully been used in extensive spectrum measurement campaigns and empirical studies in the context of the DSA/CR technology. An exhaustive and in-depth description of the developed measurement platform is provided, with a special emphasis on implementation details and lessons learned during the development of the tool that may result helpful to other researchers and engineers in the development of similar radio spectrum measurement tools.Peer Reviewe