Conference paper Open Access

Broadcast-Multicast Single Frequency Network versus Unicast in Cellular Systems

Juan Vargas; Cedric Thienot ´; Christophe Burdinat; Xavier Lagrange


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        <foaf:name>Cedric Thienot ´</foaf:name>
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        <foaf:name>Christophe Burdinat</foaf:name>
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        <foaf:name>Xavier Lagrange</foaf:name>
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    <dct:title>Broadcast-Multicast Single Frequency Network versus Unicast in Cellular Systems</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2019</dct:issued>
    <dcat:keyword>Cellular Networks, SFN, Broadcast, Unicast, Beamforming, Trisectored antennas, video delivery</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2019-10-13</dct:issued>
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    <dct:description>&lt;p&gt;Video is an important factor of the load in cellular&lt;br&gt; networks due to the growing popularity of streaming and&lt;br&gt; linear services. In unicast transmission mode, the same data is&lt;br&gt; transmitted as many times as the number of receivers demanding&lt;br&gt; the same video content. Conversely, in broadcast transmissions&lt;br&gt; using the Single Frequency Network (SFN) technique, a set of&lt;br&gt; base stations perform synchronized transmission of the same&lt;br&gt; waveform to a potentially infinite number of users. The objective&lt;br&gt; of this study is to compare the performance of unicast and&lt;br&gt; broadcast. More precisely, we determine the minimum number&lt;br&gt; of users downloading the same data from which a broadcast&lt;br&gt; transmission is more efficient than multiple unicast transmissions.&lt;br&gt; In this paper, a model to calculate the Signal-to-Interference-plusNoise Ratio (SINR) in unicast and broadcast modes is presented,&lt;br&gt; considering Poisson distributed base stations, path loss, fading,&lt;br&gt; shadowing, trisectored antennas, SFN with a different number&lt;br&gt; of base stations and beamforming in unicast mode. Results show&lt;br&gt; that even when an SFN is formed by just 2 base stations and&lt;br&gt; unicast transmissions are performed using beamforming with 8&lt;br&gt; antennas per sector, broadcast outperforms unicast when there&lt;br&gt; are at least 8 users per cell demanding the same content.&lt;/p&gt;</dct:description>
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