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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    <subfield code="a">Cellular Networks, SFN, Broadcast, Unicast, Beamforming, Trisectored antennas, video delivery</subfield>
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    <subfield code="u">Enensys Technologies</subfield>
    <subfield code="a">Cedric Thienot ´</subfield>
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    <subfield code="u">Enensys Technologies</subfield>
    <subfield code="a">Christophe Burdinat</subfield>
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    <subfield code="u">IMT Atlantique/IRISA</subfield>
    <subfield code="a">Xavier Lagrange</subfield>
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    <subfield code="c">2019-10-13</subfield>
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    <subfield code="u">Enensys Technologies</subfield>
    <subfield code="a">Juan Vargas</subfield>
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    <subfield code="a">Broadcast-Multicast Single Frequency Network versus Unicast in Cellular Systems</subfield>
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    <subfield code="a">Creative Commons Attribution 4.0 International</subfield>
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    <subfield code="a">&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;</subfield>
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    <subfield code="a">10.5281/zenodo.4299947</subfield>
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