{"id":105440,"date":"2010-03-12T00:00:00","date_gmt":"2010-03-12T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/analysis-of-qos-parameters-in-fading-channels-based-on-the-effective-bandwidth-theory\/"},"modified":"2010-03-12T00:00:00","modified_gmt":"2010-03-12T00:00:00","slug":"analysis-of-qos-parameters-in-fading-channels-based-on-the-effective-bandwidth-theory","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/radiocomunicaciones\/analysis-of-qos-parameters-in-fading-channels-based-on-the-effective-bandwidth-theory\/","title":{"rendered":"Analysis of qos parameters in fading channels based on the effective bandwidth theory"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Beatriz Soret Alvarez <\/strong><\/h2>\n<p>T\u00edtulo de la tesis: analysis of qos parameters in fading channels based on the effective bandwidth theory resumen: en este trabajo se ha estudiado un sistema de comunicaciones inal\u00e1mbrico en el que se multiplexan flujos de informaci\u00f3n variable en un canal que tambi\u00e9n es de velocidad variable, ya que el sistema aplica t\u00e9cnicas adaptativas. En concreto, se ha analizado la relaci\u00f3n que existe entre la fuente de informaci\u00f3n y el canal de comunicaci\u00f3n y par\u00e1metros de calidad de servicio como son el retardo y la tasa de error de bit. Por ser el canal variable, el requisito de retardo se define en t\u00e9rminos probabil\u00edsticos. para realizar el an\u00e1lisis se ha empleado la teor\u00eda del ancho de banda efectivo. Ha sido necesario evaluar anal\u00edticamente el ancho de banda efectivo de varios canales radio (selectivos o no en frecuencia). Este resultado ha permitido calcular los percentiles del retardo experimentado por la informaci\u00f3n transmitida por el enlace. Adem\u00e1s, se ha cuantificado la m\u00e1xima velocidad de fuente para la que se puede garantizar probabil\u00edsticamente un cierto retardo. El retardo que sufre un flujo de informaci\u00f3n depende no s\u00f3lo de la velocidad de transmisi\u00f3n del canal, sino tambi\u00e9n de la distribuci\u00f3n y la autocorrelaci\u00f3n del proceso fuente. Dos procesos fuente con la misma velocidad media pero siguiendo una distribuci\u00f3n distinta dar\u00e1n lugar a distintos valores de retardo. En cualquier caso, las mejores condiciones de retardo se consiguen cuando el usuario genera tr\u00e1fico a una velocidad constante. Asimismo, la correlaci\u00f3n del canal, ya sea temporal, frecuencial o ambas, tambi\u00e9n afecta negativamente al retardo. finalmente, se ha extendido el an\u00e1lisis para varios planteadores en el caso en que el canal sea compartido por un conjunto de usuarios. En este nuevo escenario, no s\u00f3lo la restricci\u00f3n de retardo y el proceso canal y fuente afectan a la m\u00e1xima velocidad de fuente admisible, sino que tambi\u00e9n la disciplina con la que se selecciona al usuario que va a transmitir tiene un gran impacto en los resultados. La evaluaci\u00f3n de la m\u00e1xima velocidad de fuente admisible por cada usuario permite comparar las prestaciones obtenidas por distintos algoritmos de multiplexaci\u00f3n, en t\u00e9rminos de velocidad neta, retardo y justicia. en resumen, los resultados anal\u00edticos de esta tesis demuestran la alta sensibilidad del retardo a la variabilidad del tr\u00e1fico, a la correlaci\u00f3n temporal o frecuencial del canal y al algoritmo de multiplexaci\u00f3n<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Analysis of qos parameters in fading channels based on the effective bandwidth theory<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Analysis of qos parameters in fading channels based on the effective bandwidth theory <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Beatriz Soret Alvarez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 M\u00e1laga<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 03\/12\/2010<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Mar\u00eda  Del Carmen Aguayo Torres<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: lorenza Carrasco martorell <\/li>\n<li>petar Popovski (vocal)<\/li>\n<li>nicola Marchetti (vocal)<\/li>\n<li>azadeh Faridih (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Beatriz Soret Alvarez T\u00edtulo de la tesis: analysis of qos parameters in fading channels based on the 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