<?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>0120-5609</journal-id>
<journal-title><![CDATA[Ingeniería e Investigación]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. Investig.]]></abbrev-journal-title>
<issn>0120-5609</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad Nacional de Colombia.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-56092018000300050</article-id>
<article-id pub-id-type="doi">10.15446/ing.investig.v38n3.67523</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Calculation of Call Unpairing Probability in GSM Cell Using VAMOS Technics]]></article-title>
<article-title xml:lang="es"><![CDATA[Cálculo de Probabilidad de Emparejamiento sin éxito de Llamada en Celular GSM Usando la Técnica de VAMOS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miti&#263;]]></surname>
<given-names><![CDATA[Dragan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lebl]]></surname>
<given-names><![CDATA[Aleksandar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Markov]]></surname>
<given-names><![CDATA[Zarko]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,IRITEL  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Serbia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,IRITEL  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Serbia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,IRITEL  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Serbia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>38</volume>
<numero>3</numero>
<fpage>50</fpage>
<lpage>58</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-56092018000300050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-56092018000300050&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-56092018000300050&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This paper considers GSM cell system in which pure VAMOS technics is implemented. Traffic properties of the system with VAMOS possibility (probability of unsuccessful pairing of connections in one timeslot and loss probability due to lack of idle channels) are determined. It is found dependence of these properties on the allowable power difference for successful pairing, on offered traffic and on environmental attenuation coefficient. The serving quality of this channel group is compared to an Erlang group with the same parameters. It is proved that probability of bad serving in the group of VAMOS channels is higher than in Erlang group with the same parameters, but not more than two times. The results obtained by calculation are proved comparing them to the results of simulation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Este documento considera el sistema celular GSM en el que se implementa la técnica de VAMOS puros. Se determinan las propiedades de tráfico del sistema con VAMOS posibilidad (probabilidad de emparejamiento sin éxito de conexiones en una canal del tiempo, probabilidad y la pérdida debido a la falta de canales en reposo). Se encuentra la dependencia de estas propiedades de la diferencia de potencia permitida para el emparejamiento con éxito, el tráfico ofrecido y el coeficiente de atenuación del medio ambiente. La calidad de porción de este grupo de canales se compara con un grupo de Erlang con los mismos parámetros. Se demostró que la probabilidad de mala porción en el grupo de canales VAMOS es más alta que en el grupo de Erlang con los mismos parámetros, pero no más de dos veces. Los resultados obtenidos mediante el cálculo se demuestran comparando con los resultados de la simulación.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[GSM]]></kwd>
<kwd lng="en"><![CDATA[VAMOS]]></kwd>
<kwd lng="en"><![CDATA[(un)successful pairing]]></kwd>
<kwd lng="en"><![CDATA[Erlang model]]></kwd>
<kwd lng="es"><![CDATA[GSM]]></kwd>
<kwd lng="es"><![CDATA[VAMOS]]></kwd>
<kwd lng="es"><![CDATA[emparejamiento sin (con) éxito]]></kwd>
<kwd lng="es"><![CDATA[modelo de Erlang]]></kwd>
</kwd-group>
</article-meta>
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