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<h1>EGPRS coverage planning and link budget</h1>

<p>Coverage prediction is based on radio wave propagation
formulas. The design provides the basis for Uplink and Downlink Budget calculations.
However, unlike CS network planning, packet services can tolerate delay and
throughput variations and maximise the capacity with the employment of advanced
features such as <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id03726#id03726" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id03726#id03726');return false" shape="rect" target="_blank">LA</a> and <a href="NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id0361#id0361" onclick="openSmallPopup(event,'NED?action=retrieve&amp;identifier=general_glossary&amp;edition=13&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=id0361#id0361');return false" shape="rect" target="_blank">IR</a>.
Consequently, network planning can be optimised with smaller margins.</p>


<p>The physical layer of EGPRS is the existing GSM network;
the EGPRS coverage area therefore depends on the GSM service area. However,
the different coding schemes have different coverage areas, as shown in table <em>EGPRS
Relative coverage to MCS-5</em>. The MCS-5 coverage is approx 50% of MCS-1,
while MCS-8 coverage is approx 40% of MCS-5.</p>


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<img alt="urn:mars:dn0445374:1:none:global:cgm_fixed:data:data" border="0" src="NED?action=retrieve&amp;identifier=dn0445374&amp;edition=1&amp;language=none&amp;coverage=global&amp;encoding=gif&amp;component=data&amp;item=data" /><p class="figure-caption">Figure: EGPRS relative coverage to MSC-5</p>
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<p><a href="NED?action=retrieve&amp;identifier=dn02256778&amp;edition=5&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_2#ned_2" onclick="sync(this);return true" shape="rect">Required signal strength </a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn02256778&amp;edition=5&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_3#ned_3" onclick="sync(this);return true" shape="rect">Receiving end</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn02256778&amp;edition=5&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_4#ned_4" onclick="sync(this);return true" shape="rect">Transmitting end</a></p>


<p><a href="NED?action=retrieve&amp;identifier=dn02256778&amp;edition=5&amp;language=en&amp;coverage=global&amp;encoding=xhtml_1_0&amp;component=data&amp;item=data&amp;pointer=ned_5#ned_5" onclick="sync(this);return true" shape="rect">Example link budget</a></p>
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