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<h2>HLR and throughput optimisation for EGPRS</h2>

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<h3>QoS
Profile</h3>

<p>The HLR settings for <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=id011623#id011623" 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=id011623#id011623');return false" shape="rect" target="_blank">PDP</a> context
and QoS profile need to be according to Rel99 according to the table below. </p>


<p>The <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=id08982#id08982" 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=id08982#id08982');return false" shape="rect" target="_blank">LLC</a> un-ACK 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=id08942#id08942" 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=id08942#id08942');return false" shape="rect" target="_blank">RLC</a>
ACK mode can be selected by the following HLR settings:</p>


<ul>
<li><p><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=id0509#id0509" 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=id0509#id0509');return false" shape="rect" target="_blank">SDU</a> error ratio:
1E-4</p>
</li>
<li><p>In-sequence delivery of SDUs: No</p>
</li>
<li><p>Delivery of erroneous SDUs: No</p>
</li>
</ul>


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<p>Table: Selection of LLC and RLC protocol Modes</p>


<table border="1">
<thead>
<tr align="left" char="" charoff="50" valign="bottom">
<th colspan="1" rowspan="1" valign="top"><p>SDU Error Ratio</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Residual Bit Error Ratio</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Delivery of erroneous SDUs</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Delivery order</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Resulting LLC mode</p>
</th>
<th colspan="1" rowspan="1" valign="top"><p>Resulting RLC mode</p>
</th>
</tr>
</thead>
<tbody>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>10<sup>-6</sup></p>
</td>
<td colspan="1" rowspan="1"><p>10 <sup>-5</sup></p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>Yes</p>
</td>
<td colspan="1" rowspan="1"><p>ACK</p>
</td>
<td colspan="1" rowspan="1"><p>ACK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>10<sup> -4</sup></p>
</td>
<td colspan="1" rowspan="1"><p>10 <sup>-5</sup></p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>Un-ACK, Protected</p>
</td>
<td colspan="1" rowspan="1"><p>ACK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>10 <sup>-3</sup></p>
</td>
<td colspan="1" rowspan="1"><p>10 <sup>-5</sup></p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>Un-ACK, Protected</p>
</td>
<td colspan="1" rowspan="1"><p>Un-ACK</p>
</td>
</tr>
<tr align="left" char="" charoff="50" valign="top">
<td colspan="1" rowspan="1"><p>10 <sup>-3</sup></p>
</td>
<td colspan="1" rowspan="1"><p>4 * 10 <sup>-3</sup></p>
</td>
<td colspan="1" rowspan="1"><p>Yes</p>
</td>
<td colspan="1" rowspan="1"><p>No</p>
</td>
<td colspan="1" rowspan="1"><p>Un-ACK, Unprotected</p>
</td>
<td colspan="1" rowspan="1"><p>Un-ACK</p>
</td>
</tr>
</tbody>
</table>
</div>
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<div class="topic">
<h3>Maximum
bit rate</h3>

<p>The QoS Attributes <em>Max bit rate UL</em>
and <em>Max bit rate DL</em> can be used to limit the maximum
throughput of user independently of EGPRS multi slot class. The Nokia GGSN
has traffic shaping functionality that can limit the maximum throughput for
DL.</p>


<p>The following settings do not limit the EGPRS throughput
for up to 4 slots DL and 2 slots UL.</p>


<ul>
<li><p>Max bit rate DL: 256 kbit/s</p>
</li>
<li><p>Max bit rate UL: 128 kbit/s</p>
</li>
</ul>
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