<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0124-2253</journal-id>
<journal-title><![CDATA[Revista científica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Cient.]]></abbrev-journal-title>
<issn>0124-2253</issn>
<publisher>
<publisher-name><![CDATA[Universidad Distrital Francisco José de Caldas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0124-22532020000100122</article-id>
<article-id pub-id-type="doi">10.14483/23448350.15022</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Retardo en Redes Inalámbricas Colaborativas]]></article-title>
<article-title xml:lang="en"><![CDATA[Delay in Collaborative Wireless Networks]]></article-title>
<article-title xml:lang="pt"><![CDATA[Atraso em Redes Sem Fio Colaborativas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Suárez]]></surname>
<given-names><![CDATA[César Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giral-Ramírez]]></surname>
<given-names><![CDATA[Diego Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedraza-Martínez]]></surname>
<given-names><![CDATA[Luis Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Distrital Francisco José de Caldas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Distrital Francisco José de Caldas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Distrital Francisco José de Caldas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<numero>37</numero>
<fpage>122</fpage>
<lpage>130</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0124-22532020000100122&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0124-22532020000100122&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0124-22532020000100122&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La radio cognitiva es una tecnología que hace un uso eficiente del espectro y permite a los usuarios secundarios utilizar las oportunidades espectrales de las bandas licenciadas, pero sin interferir con las comunicaciones de los usuarios primarios. El objetivo de este artículo es analizar y comparar el desempeño de dos algoritmos de toma de decisiones multicriterio: Topsis y Vikor, con diferentes niveles de colaboración entre usuarios secundarios. Los dos algoritmos se evalúan y comparar con respecto al retardo durante una transmisión de información de 9 MB. La comparación se realizó bajo cuatro escenarios distintos, de acuerdo con la clase de servicio y el nivel de tráfico, para la banda de frecuencia GSM. De acuerdo con los resultados alcanzados el algoritmo Topsis tiene un mejor desempeño en los diferentes escenarios y niveles de colaboración.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Cognitive radio is a technology that makes efficient use of the spectrum allowing secondary users to use the spectral opportunities of the licensed bands, but without interfering with the communications of the primary users. The objective of this article is to analyze and compare the performance of two multicriteria decision making algorithms: Topsis and Vikor, with different levels of collaboration between secondary users. The two algorithms are evaluated and compared at the delay level during an information transmission of 9 MB. The comparison is made under four different scenarios, according to the class of service and the level of traffic, for the GSM frequency band. According to the results achieved, the Topsis algorithm has a better performance in different scenarios and collaboration levels.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo O rádio cognitivo é uma tecnologia que faz uso eficiente do espectro, permitindo que usuários secundários usem as oportunidades espectrais das bandas licenciadas, mas sem interferir nas comunicações dos usuários principais. O objetivo deste artigo é analisar e comparar o desempenho de dois algoritmos multicritério de tomada de decisão: Topsis e Vikor com diferentes níveis de colaboração entre usuários secundários. Os dois algoritmos são avaliados e comparados no nível de atraso durante uma transmissão de informação de 9 MB. A comparação é feita em quatro cenários diferentes, de acordo com a classe de serviço e o nível de tráfego, para a faixa de freqüência GSM. De acordo com os resultados obtidos, o algoritmo Topsis possui um melhor desempenho em diferentes cenários e níveis de colaboração.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[decisión espectral]]></kwd>
<kwd lng="es"><![CDATA[GSM]]></kwd>
<kwd lng="es"><![CDATA[MCDM]]></kwd>
<kwd lng="es"><![CDATA[radio cognitiva]]></kwd>
<kwd lng="es"><![CDATA[redes inalámbricas]]></kwd>
<kwd lng="es"><![CDATA[retardo]]></kwd>
<kwd lng="en"><![CDATA[cognitive radio]]></kwd>
<kwd lng="en"><![CDATA[delay]]></kwd>
<kwd lng="en"><![CDATA[GSM]]></kwd>
<kwd lng="en"><![CDATA[MCDM]]></kwd>
<kwd lng="en"><![CDATA[spectral decision]]></kwd>
<kwd lng="en"><![CDATA[wireless networks]]></kwd>
<kwd lng="pt"><![CDATA[GSM]]></kwd>
<kwd lng="pt"><![CDATA[MCDM]]></kwd>
<kwd lng="pt"><![CDATA[decisão espectral]]></kwd>
<kwd lng="pt"><![CDATA[rádio Cognitivo]]></kwd>
<kwd lng="pt"><![CDATA[redes sem fio]]></kwd>
<kwd lng="pt"><![CDATA[atraso]]></kwd>
</kwd-group>
</article-meta>
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